blabla/PATSTAT/CPC_data/CPCSchemeXML202302/cpc-scheme-F01L.xml

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<class-scheme publication-date="2023-02-01" scheme-type="cpc" publication-type="official">
<classification-item breakdown-code="false" not-allocatable="true" level="5" additional-only="false" sort-key="F01L" definition-exists="true" date-revised="2021-01-01" status="published"><classification-symbol>F01L</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES</text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph>Groups <class-ref scheme="cpc">F01L1/00</class-ref>&#160;-&#160;<class-ref scheme="cpc">F01L13/00</class-ref> cover only valve-gear or valve arrangements without provision for variable fluid distribution.</note-paragraph><note-paragraph>Valve gear or valve arrangements specially adapted for steam engines are covered by groups <class-ref scheme="cpc">F01L15/00</class-ref>&#160;-&#160;<class-ref scheme="cpc">F01L35/00</class-ref>.</note-paragraph><note-paragraph>Valve-gear arrangements specially adapted for machines or engines with variable working-fluid distribution are covered by groups <class-ref scheme="cpc">F01L15/00</class-ref>&#160;-&#160;<class-ref scheme="cpc">F01L35/00</class-ref>.</note-paragraph><note-paragraph>Attention is drawn to the notes preceding class <class-ref scheme="cpc">F01</class-ref>, especially Note (3).</note-paragraph><note-paragraph>As regards the above-mentioned Note (3), attention is drawn to <class-ref scheme="cpc">F01B3/10</class-ref>, <class-ref scheme="cpc">F01B15/06</class-ref>, <class-ref scheme="cpc">F01C21/18</class-ref>, <class-ref scheme="cpc">F02B53/06</class-ref>, <class-ref scheme="cpc">F03C1/08</class-ref>, <class-ref scheme="cpc">F04B1/18</class-ref>, <class-ref scheme="cpc">F04B7/00</class-ref>, <class-ref scheme="cpc">F04B39/08</class-ref>, <class-ref scheme="cpc">F04B39/10</class-ref>, and <class-ref scheme="cpc">F04C15/06</class-ref>, <class-ref scheme="cpc">F04C29/12</class-ref>. </note-paragraph></note><note type="warning"><note-paragraph warning-type="ipc-not-used">The following IPC groups are not in the CPC scheme. The subject matter for these IPC groups is classified in the following CPC groups: <table><row><entry><class-ref scheme="ipc">F01L31/20</class-ref></entry><entry> covered by </entry><entry>  <class-ref scheme="cpc">F01L31/08</class-ref> - <class-ref scheme="cpc">F01L31/18</class-ref>  </entry></row><row><entry><class-ref scheme="ipc">F01L31/22</class-ref></entry><entry> covered by </entry><entry>  <class-ref scheme="cpc">F01L31/08</class-ref> - <class-ref scheme="cpc">F01L31/18</class-ref>  </entry></row><row><entry><class-ref scheme="ipc">F01L31/24</class-ref></entry><entry> covered by </entry><entry>  <class-ref scheme="cpc">F01L31/08</class-ref> - <class-ref scheme="cpc">F01L31/18</class-ref>  </entry></row></table></note-paragraph></note></notes-and-warnings>
<classification-item breakdown-code="false" not-allocatable="true" level="6" additional-only="false" sort-key="F01L1/00" date-revised="2021-01-01" status="published"><classification-symbol>F01L1/00</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Valve-gear or valve arrangements for positive-displacement machines or engines other than steam engines, e.g. for internal-combustion piston engines, without provision for variable fluid distribution</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F01L1/00" definition-exists="true" ipc-concordant="F01L1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L1/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Valve-gear or valve arrangements, e.g. lift-valve gear </text><reference><text>lift-valve and valve-seat assemblies <u>per se</u> <class-ref scheme="cpc">F01L3/00</class-ref>; slide-valve gear <class-ref scheme="cpc">F01L5/00</class-ref>; actuated non-mechanically <class-ref scheme="cpc">F01L9/00</class-ref>; valve arrangements in working piston or piston rod <class-ref scheme="cpc">F01L11/00</class-ref>; modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations <class-ref scheme="cpc">F01L13/00</class-ref></text></reference></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L1/02" definition-exists="true" ipc-concordant="F01L1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L1/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Valve drive </text><reference><text>transmitting-gear between valve drive and valve <class-ref scheme="cpc">F01L1/12</class-ref></text></reference></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F01L1/022" definition-exists="true" ipc-concordant="F01L1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L1/022</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Chain drive</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F01L1/024" definition-exists="true" ipc-concordant="F01L1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L1/024</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Belt drive</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F01L1/026" definition-exists="true" ipc-concordant="F01L1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L1/026</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Gear drive</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F01L1/028" definition-exists="false" ipc-concordant="F01L1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2001/028</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Pre-assembled timing arrangement, e.g. located in a cassette</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F01L1/04" definition-exists="false" ipc-concordant="F01L1/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L1/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by means of cams, camshafts, cam discs, eccentrics or the like </text><reference><text><class-ref scheme="cpc">F01L1/10</class-ref> takes precedence</text></reference></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F01L1/042" definition-exists="false" ipc-concordant="F01L1/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L1/042</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Cam discs</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F01L1/044" definition-exists="false" ipc-concordant="F01L1/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F01L1/044</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Reciprocating cams</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">F01L1/044</class-ref> is impacted by reclassification into group <class-ref scheme="cpc">F01L1/10</class-ref>.<br/>Groups <class-ref scheme="cpc">F01L1/044</class-ref> and <class-ref scheme="cpc">F01L1/10</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F01L1/047" definition-exists="true" ipc-concordant="F01L1/047" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L1/047</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Camshafts</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="F01L1/0471" definition-exists="false" ipc-concordant="F01L1/047" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-08-01" status="published"><classification-symbol>F01L2001/0471</classification-symbol><class-title date-revised="2018-08-01"><title-part><CPC-specific-text><text>Assembled camshafts</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="F01L1/0473" definition-exists="false" ipc-concordant="F01L1/047" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>F01L2001/0473</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>Composite camshafts, e.g. with cams or cam sleeve being able to move relative to the inner camshaft or a cam adjusting rod</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="F01L1/0475" definition-exists="false" ipc-concordant="F01L1/047" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F01L2001/0475</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Hollow camshafts</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="F01L1/0476" definition-exists="false" ipc-concordant="F01L1/047" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2001/0476</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Camshaft bearings</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="F01L1/0478" definition-exists="false" ipc-concordant="F01L1/047" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2001/0478</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Torque pulse compensated camshafts</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F01L1/053" definition-exists="true" ipc-concordant="F01L1/053" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L1/053</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>overhead type</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F01L1/0532" definition-exists="false" ipc-concordant="F01L1/053" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L1/0532</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the cams being directly in contact with the driven valve</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="F01L1/0535" definition-exists="false" ipc-concordant="F01L1/053" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2001/0535</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Single overhead camshafts [SOHC]</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="F01L1/0537" definition-exists="false" ipc-concordant="F01L1/053" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2001/0537</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Double overhead camshafts [DOHC]</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="F01L1/054" definition-exists="false" ipc-concordant="F01L1/047" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2001/054</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Camshafts in cylinder block</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F01L1/06" definition-exists="false" ipc-concordant="F01L1/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L1/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the cams, or the like, rotating at a higher speed than that corresponding to the valve cycle, e.g. operating fourstroke engine valves directly from crankshaft</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F01L1/08" definition-exists="true" ipc-concordant="F01L1/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L1/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Shape of cams</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F01L1/10" definition-exists="true" ipc-concordant="F01L1/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F01L1/10</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>by means of crank-or eccentric-driven rods</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">F01L1/10</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">F01L1/044</class-ref>. <br/>Groups <class-ref scheme="cpc">F01L1/044</class-ref> and <class-ref scheme="cpc">F01L1/10</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L1/12" definition-exists="true" ipc-concordant="F01L1/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L1/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Transmitting gear between valve drive and valve </text><reference><text>simultaneously operating two or more valves <class-ref scheme="cpc">F01L1/26</class-ref></text></reference></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F01L1/14" definition-exists="true" ipc-concordant="F01L1/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L1/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Tappets </text><CPC-specific-text><reference><text>hydraulic tappets for automatically adjusting or compensating clearance <class-ref scheme="cpc">F01L1/24</class-ref></text></reference></CPC-specific-text></title-part><title-part><text>Push rods</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F01L1/143" definition-exists="false" ipc-concordant="F01L1/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L1/143</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for use with overhead camshafts</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F01L1/146" definition-exists="false" ipc-concordant="F01L1/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L1/146</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Push-rods</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F01L1/16" definition-exists="false" ipc-concordant="F01L1/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L1/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Silencing impact</text></title-part><title-part><text>Reducing wear</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F01L1/18" definition-exists="true" ipc-concordant="F01L1/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L1/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Rocking arms or levers</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F01L1/181" definition-exists="true" ipc-concordant="F01L1/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L1/181</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Centre pivot rocking arms</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F01L1/182" definition-exists="true" ipc-concordant="F01L1/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L1/182</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the rocking arm being pivoted about an individual fulcrum, i.e. not about a common shaft</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F01L1/183" definition-exists="true" ipc-concordant="F01L1/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L1/183</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of the boat type</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F01L1/185" definition-exists="true" ipc-concordant="F01L1/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L1/185</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Overhead end-pivot rocking arms</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="F01L1/186" definition-exists="false" ipc-concordant="F01L1/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2001/186</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Split rocking arms, e.g. rocker arms having two articulated parts and means for varying the relative position of these parts or for selectively connecting the parts to move in unison</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="F01L1/187" definition-exists="false" ipc-concordant="F01L1/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2001/187</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Clips, e.g. for retaining rocker arm on pivot</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="F01L1/188" definition-exists="false" ipc-concordant="F01L1/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2001/188</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Fulcrums at upper surface</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L1/20" definition-exists="false" ipc-concordant="F01L1/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L1/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Adjusting or compensating clearance</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F01L1/205" definition-exists="false" ipc-concordant="F01L1/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L1/205</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by means of shims or the like</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F01L1/22" definition-exists="false" ipc-concordant="F01L1/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L1/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>automatically, e.g. mechanically</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F01L1/24" definition-exists="true" ipc-concordant="F01L1/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L1/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by fluid means, e.g. hydraulically</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F01L1/2405" definition-exists="false" ipc-concordant="F01L1/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L1/2405</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by means of a hydraulic adjusting device located between the cylinder head and rocker arm</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F01L1/2411" definition-exists="false" ipc-concordant="F01L1/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L1/2411</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by means of a hydraulic adjusting device located between the valve stem and rocker arm</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F01L1/2416" definition-exists="false" ipc-concordant="F01L1/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L1/2416</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by means of a hydraulic adjusting device attached to an articulated rocker</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F01L1/2422" definition-exists="false" ipc-concordant="F01L1/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L1/2422</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by means or a hydraulic adjusting device located between the push rod and rocker arm</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="F01L1/2427" definition-exists="false" ipc-concordant="F01L1/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2001/2427</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by means of an hydraulic adjusting device located between cam and push rod</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="F01L1/2433" definition-exists="false" ipc-concordant="F01L1/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2001/2433</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Self contained, e.g. sealed hydraulic lash adjusters</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="F01L1/2438" definition-exists="false" ipc-concordant="F01L1/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2001/2438</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with means permitting forced opening of check valve</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="F01L1/2444" definition-exists="false" ipc-concordant="F01L1/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2001/2444</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Details relating to the hydraulic feeding circuit, e.g. lifter oil manifold assembly [LOMA]</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F01L1/245" definition-exists="false" ipc-concordant="F01L1/245" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L1/245</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Hydraulic tappets</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F01L1/25" definition-exists="false" ipc-concordant="F01L1/25" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L1/25</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>between cam and valve stem</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="F01L1/252" definition-exists="false" ipc-concordant="F01L1/25" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L1/252</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for side-valve engines</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F01L1/255" definition-exists="false" ipc-concordant="F01L1/255" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L1/255</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>between cam and rocker arm</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="F01L1/256" definition-exists="false" ipc-concordant="F01L1/245" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2001/256</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>between cam and push rod</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L1/26" definition-exists="false" ipc-concordant="F01L1/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L1/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the provision of two or more valves operated simultaneously by same transmitting-gear</text></title-part><title-part><text>peculiar to machines or engines with more than two lift-valves per cylinder </text><reference><text>with coaxial valves <class-ref scheme="cpc">F01L1/28</class-ref></text></reference></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F01L1/262" definition-exists="false" ipc-concordant="F01L1/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L1/262</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with valve stems disposed radially from a centre which is substantially the centre of curvature of the upper wall surface of a combustion chamber </text><reference><text><class-ref scheme="cpc">F01L1/265</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F01L1/265" definition-exists="false" ipc-concordant="F01L1/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L1/265</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>peculiar to machines or engines with three or more intake valves per cylinder</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F01L1/267" definition-exists="false" ipc-concordant="F01L1/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L1/267</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with means for varying the timing or the lift of the valves</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L1/28" definition-exists="false" ipc-concordant="F01L1/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L1/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the provision of coaxial valves</text></title-part><title-part><text>characterised by the provision of valves co-operating with both intake and exhaust ports</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F01L1/285" definition-exists="false" ipc-concordant="F01L1/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L1/285</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Coaxial intake and exhaust valves</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L1/30" definition-exists="false" ipc-concordant="F01L1/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L1/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the provision of positively opened and closed valves, i.e. desmodromic valves</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L1/32" definition-exists="true" ipc-concordant="F01L1/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L1/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the provision of means for rotating lift valves, e.g. to diminish wear</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L1/34" definition-exists="true" ipc-concordant="F01L1/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L1/34</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the provision of means for changing the timing of the valves without changing the duration of opening </text><CPC-specific-text><text>and without affecting the magnitude of the valve lift</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F01L1/344" definition-exists="true" ipc-concordant="F01L1/344" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L1/344</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F01L1/34403" definition-exists="true" ipc-concordant="F01L1/344" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L1/34403</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using helically teethed sleeve or gear moving axially between crankshaft and camshaft</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F01L1/34406" definition-exists="true" ipc-concordant="F01L1/344" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L1/34406</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the helically teethed sleeve being located in the camshaft driving pulley</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F01L1/34409" definition-exists="false" ipc-concordant="F01L1/344" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L1/34409</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by torque-responsive means</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F01L1/34413" definition-exists="true" ipc-concordant="F01L1/344" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L1/34413</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using composite camshafts, e.g. with cams being able to move relative to the camshaft</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F01L1/34416" definition-exists="true" ipc-concordant="F01L1/344" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L1/34416</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using twisted cams</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F01L1/3442" definition-exists="true" ipc-concordant="F01L1/344" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L1/3442</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using hydraulic chambers with variable volume to transmit the rotating force</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="F01L1/34423" definition-exists="false" ipc-concordant="F01L1/344" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2001/34423</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Details relating to the hydraulic feeding circuit</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="F01L1/34426" definition-exists="false" ipc-concordant="F01L1/344" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2001/34426</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Oil control valves</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="F01L1/3443" definition-exists="false" ipc-concordant="F01L1/344" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2001/3443</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Solenoid driven oil control valves</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="F01L1/34433" definition-exists="false" ipc-concordant="F01L1/344" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2001/34433</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Location oil control valves</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="F01L1/34436" definition-exists="false" ipc-concordant="F01L1/344" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2001/34436</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Features or method for avoiding malfunction due to foreign matters in oil</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="F01L1/3444" definition-exists="false" ipc-concordant="F01L1/344" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2001/3444</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Oil filters</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="F01L1/34443" definition-exists="false" ipc-concordant="F01L1/344" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2001/34443</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Cleaning control of oil control valves</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="F01L1/34446" definition-exists="false" ipc-concordant="F01L1/344" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2001/34446</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Fluid accumulators for the feeding circuit</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="F01L1/3445" definition-exists="false" ipc-concordant="F01L1/344" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2001/3445</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Details relating to the hydraulic means for changing the angular relationship</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="F01L1/34453" definition-exists="false" ipc-concordant="F01L1/344" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2001/34453</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Locking means between driving and driven members</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="F01L1/34456" definition-exists="false" ipc-concordant="F01L1/344" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2001/34456</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Locking in only one position</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="F01L1/34459" definition-exists="false" ipc-concordant="F01L1/344" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2001/34459</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Locking in multiple positions</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="F01L1/34463" definition-exists="false" ipc-concordant="F01L1/344" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2001/34463</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Locking position intermediate between most retarded and most advanced positions</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="F01L1/34466" definition-exists="false" ipc-concordant="F01L1/344" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2001/34466</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with multiple locking devices</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="F01L1/34469" definition-exists="false" ipc-concordant="F01L1/344" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2001/34469</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Lock movement parallel to camshaft axis</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="F01L1/34473" definition-exists="false" ipc-concordant="F01L1/344" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2001/34473</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Lock movement perpendicular to camshaft axis</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="F01L1/34476" definition-exists="false" ipc-concordant="F01L1/344" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2001/34476</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Restrict range locking means</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="F01L1/34479" definition-exists="false" ipc-concordant="F01L1/344" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2001/34479</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Sealing of phaser devices</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="F01L1/34483" definition-exists="false" ipc-concordant="F01L1/344" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2001/34483</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Phaser return springs</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="F01L1/34486" definition-exists="false" ipc-concordant="F01L1/344" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2001/34486</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Location and number of the means for changing the angular relationship</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="F01L1/34489" definition-exists="false" ipc-concordant="F01L1/344" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2001/34489</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Two phasers on one camshaft</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="F01L1/34493" definition-exists="false" ipc-concordant="F01L1/344" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2001/34493</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Dual independent phasing system [DIPS]</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="F01L1/34496" definition-exists="false" ipc-concordant="F01L1/344" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2001/34496</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Two phasers on different camshafts</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F01L1/348" definition-exists="true" ipc-concordant="F01L1/348" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L1/348</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by means acting on timing belts or chains</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F01L1/352" definition-exists="true" ipc-concordant="F01L1/352" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L1/352</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using bevel or epicyclic gear</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="F01L1/3521" definition-exists="false" ipc-concordant="F01L1/352" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2001/3521</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Harmonic drive of flexspline type</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="F01L1/3522" definition-exists="false" ipc-concordant="F01L1/352" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2001/3522</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with electromagnetic brake</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F01L1/356" definition-exists="false" ipc-concordant="F01L1/356" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>F01L1/356</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>making the angular relationship oscillate </text><CPC-specific-text><text>, e.g. non-homokinetic drive</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L1/36" definition-exists="false" ipc-concordant="F01L1/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L1/36</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>peculiar to machines or engines of specific type other than four-stroke cycle</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F01L1/38" definition-exists="false" ipc-concordant="F01L1/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L1/38</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for engines with other than four-stroke cycle, e.g. with two-stroke cycle </text><reference><text><class-ref scheme="cpc">F01L1/26</class-ref>, <class-ref scheme="cpc">F01L1/28</class-ref> take precedence</text></reference></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F01L1/40" definition-exists="true" ipc-concordant="F01L1/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F01L1/40</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>for engines with scavenging charge near top dead centre position, e.g. by overlapping inlet and exhaust time</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F01L1/42" definition-exists="false" ipc-concordant="F01L1/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L1/42</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for machines or engines characterised by cylinder arrangements, e.g. star or fan</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L1/44" definition-exists="false" ipc-concordant="F01L1/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L1/44</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Multiple-valve gear or arrangements, not provided for in preceding subgroups, e.g. with lift and different valves</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F01L1/443" definition-exists="false" ipc-concordant="F01L1/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L1/443</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising a lift valve and at least one rotary valve</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F01L1/446" definition-exists="false" ipc-concordant="F01L1/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L1/446</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising a lift valve and at least one reed valve</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L1/46" definition-exists="false" ipc-concordant="F01L1/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L1/46</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Component parts, details, or accessories, not provided for in preceding subgroups</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F01L1/462" definition-exists="false" ipc-concordant="F01L1/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L1/462</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Valve return spring arrangements</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F01L1/465" definition-exists="false" ipc-concordant="F01L1/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L1/465</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Pneumatic arrangements</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F01L1/467" definition-exists="false" ipc-concordant="F01L1/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2001/467</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Lost motion springs</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F01L3/00" definition-exists="true" ipc-concordant="F01L3/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L3/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces</text></title-part><title-part><text>Parts or accessories thereof</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L3/02" definition-exists="false" ipc-concordant="F01L3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L3/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Selecting particular materials for valve-members or valve-seats</text></title-part><title-part><text>Valve-members or valve-seats composed of two or more materials</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F01L3/04" definition-exists="false" ipc-concordant="F01L3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L3/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Coated valve members or valve-seats</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L3/06" definition-exists="false" ipc-concordant="F01L3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L3/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Valve members or valve-seats with means for guiding or deflecting the medium controlled thereby, e.g. producing a rotary motion of the drawn-in cylinder charge </text><reference><text>for rotating lift-valves <class-ref scheme="cpc">F01L1/32</class-ref></text></reference></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L3/08" definition-exists="false" ipc-concordant="F01L3/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L3/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Valves guides</text></title-part><title-part><text>Sealing of valve stem, e.g. sealing by lubricant</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F01L3/085" definition-exists="false" ipc-concordant="F01L3/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L3/085</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Valve cages</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L3/10" definition-exists="false" ipc-concordant="F01L3/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L3/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Connecting springs to valve members</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F01L3/11" definition-exists="false" ipc-concordant="F01L3/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2003/11</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Connecting valve members to rocker arm or tappet</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L3/12" definition-exists="false" ipc-concordant="F01L3/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L3/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cooling of valves</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F01L3/14" definition-exists="false" ipc-concordant="F01L3/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L3/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by means of a liquid or solid coolant, e.g. sodium, in a closed chamber in a valve</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F01L3/16" definition-exists="true" ipc-concordant="F01L3/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F01L3/16</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>by means of a fluid flowing through or along valve, e.g. air</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F01L3/18" definition-exists="false" ipc-concordant="F01L3/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L3/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Liquid cooling of valve</text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L3/20" definition-exists="false" ipc-concordant="F01L3/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L3/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Shapes or constructions of valve members, not provided for in preceding subgroups of this group</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F01L3/205" definition-exists="false" ipc-concordant="F01L3/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L3/205</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Reed valves</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L3/22" definition-exists="false" ipc-concordant="F01L3/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L3/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Valve-seats not provided for in preceding subgroups of this group</text></title-part><title-part><text>Fixing of valve-seats</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L3/24" definition-exists="false" ipc-concordant="F01L3/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L3/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Safety means or accessories, not provided for in preceding sub- groups of this group</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F01L3/25" definition-exists="false" ipc-concordant="F01L3/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2003/25</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Valve configurations in relation to engine</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F01L3/251" definition-exists="false" ipc-concordant="F01L3/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2003/251</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Large number of valves, e.g. five or more</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F01L3/253" definition-exists="false" ipc-concordant="F01L3/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2003/253</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>configured parallel to piston axis</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F01L3/255" definition-exists="false" ipc-concordant="F01L3/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-05-01" status="published"><classification-symbol>F01L2003/255</classification-symbol><class-title date-revised="2017-05-01"><title-part><CPC-specific-text><text>configured other than parallel or symmetrical relative to piston axis</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F01L3/256" definition-exists="false" ipc-concordant="F01L3/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2003/256</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>configured other than perpendicular to camshaft axis</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F01L3/258" definition-exists="false" ipc-concordant="F01L3/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2003/258</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>opening away from cylinder</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F01L5/00" definition-exists="true" ipc-concordant="F01L5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L5/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Slide valve-gear or valve-arrangements </text><reference><text>with pure rotary or oscillatory movement <class-ref scheme="cpc">F01L7/00</class-ref></text></reference></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L5/02" definition-exists="false" ipc-concordant="F01L5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>F01L5/02</classification-symbol><class-title date-revised="2016-08-01"><title-part><text>with other than cylindrical, sleeve or part annularly shaped valves, e.g. with flat-type valves</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L5/04" definition-exists="false" ipc-concordant="F01L5/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L5/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with cylindrical, sleeve, or part-annularly shaped valves</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F01L5/045" definition-exists="false" ipc-concordant="F01L5/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L5/045</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Piston-type or cylinder-type valves arranged above the piston and coaxial with the cylinder axis</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F01L5/06" definition-exists="false" ipc-concordant="F01L5/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L5/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>surrounding working cylinder or piston</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F01L5/08" definition-exists="false" ipc-concordant="F01L5/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L5/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements with several movements or several valves, e.g. one valve inside the other </text><reference><text>with part-annularly shaped valves <class-ref scheme="cpc">F01L5/12</class-ref></text></reference></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F01L5/10" definition-exists="false" ipc-concordant="F01L5/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L5/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with reciprocating and other movements of the same valve</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F01L5/12" definition-exists="false" ipc-concordant="F01L5/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L5/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements with part-annularly-shaped valves</text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L5/14" definition-exists="false" ipc-concordant="F01L5/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L5/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the provision of valves with reciprocating and other movements </text><reference><text>surrounding working cylinder or piston <class-ref scheme="cpc">F01L5/06</class-ref></text></reference></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F01L5/16" definition-exists="false" ipc-concordant="F01L5/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L5/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with reciprocating and other movement of same valve, e.g. longitudinally of working cylinder and in cross direction</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F01L5/18" definition-exists="false" ipc-concordant="F01L5/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L5/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with reciprocatory valve and other slide valve</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L5/20" definition-exists="false" ipc-concordant="F01L5/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F01L5/20</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>specially for two-stroke engines </text><reference><text><class-ref scheme="cpc">F01L5/06</class-ref>, <class-ref scheme="cpc">F01L5/14</class-ref> take precedence</text></reference></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L5/22" definition-exists="false" ipc-concordant="F01L5/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F01L5/22</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Multiple-valve arrangements </text><reference><text>with valves surrounding working cylinder or piston <class-ref scheme="cpc">F01L5/08</class-ref>; with reciprocatory and other slide valves <class-ref scheme="cpc">F01L5/18</class-ref>; specially for two-stroke engines <class-ref scheme="cpc">F01L5/20</class-ref></text></reference></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L5/24" definition-exists="false" ipc-concordant="F01L5/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L5/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Component parts, details or accessories, not provided for in preceding subgroups in this group</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F01L7/00" definition-exists="true" ipc-concordant="F01L7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L7/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Rotary or oscillatory slide valve-gear or valve arrangements </text><reference><text>slide valves with combined rotary and non-rotary movements, combinations of rotary and non-rotary slide valves <class-ref scheme="cpc">F01L5/00</class-ref></text></reference></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L7/02" definition-exists="false" ipc-concordant="F01L7/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L7/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with cylindrical, sleeve, or part-annularly shaped valves </text><reference><text>of disc type <class-ref scheme="cpc">F01L7/06</class-ref>; of conical type <class-ref scheme="cpc">F01L7/08</class-ref></text></reference></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F01L7/021" definition-exists="false" ipc-concordant="F01L7/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L7/021</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with one rotary valve</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F01L7/022" definition-exists="false" ipc-concordant="F01L7/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L7/022</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Cylindrical valves having one recess communicating successively with aligned inlet and exhaust ports</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F01L7/023" definition-exists="false" ipc-concordant="F01L7/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L7/023</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Cylindrical valves having a hollow or partly hollow body allowing axial inlet or exhaust fluid circulation</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F01L7/024" definition-exists="false" ipc-concordant="F01L7/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L7/024</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Cylindrical valves comprising radial inlet and axial outlet or axial inlet and radial outlet</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F01L7/025" definition-exists="false" ipc-concordant="F01L7/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L7/025</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Cylindrical valves comprising radial inlet and side outlet or side inlet and radial outlet</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F01L7/026" definition-exists="false" ipc-concordant="F01L7/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L7/026</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with two or more rotary valves, their rotational axes being parallel, e.g. 4-stroke</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F01L7/027" definition-exists="false" ipc-concordant="F01L7/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L7/027</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with two or more valves arranged coaxially </text><reference><text><class-ref scheme="cpc">F01L7/045</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F01L7/028" definition-exists="false" ipc-concordant="F01L7/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L7/028</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having the rotational axis coaxial with the cylinder axis and the valve surface not surrounding piston or cylinder</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F01L7/029" definition-exists="false" ipc-concordant="F01L7/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L7/029</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having the rotational axis of the valve parallel to the cylinder axis</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F01L7/04" definition-exists="false" ipc-concordant="F01L7/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>F01L7/04</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>surrounding working cylinder or piston</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F01L7/045" definition-exists="false" ipc-concordant="F01L7/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L7/045</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with two or more valves arranged coaxially</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L7/06" definition-exists="false" ipc-concordant="F01L7/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L7/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with disc type valves</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L7/08" definition-exists="false" ipc-concordant="F01L7/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L7/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with conically or frusto-conically shaped valves</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L7/10" definition-exists="false" ipc-concordant="F01L7/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L7/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with valves of other specific shape, e.g. spherical</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L7/12" definition-exists="false" ipc-concordant="F01L7/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L7/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>specially for two-stroke engines </text><reference><text><class-ref scheme="cpc">F01L7/04</class-ref> takes precedence</text></reference></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L7/14" definition-exists="false" ipc-concordant="F01L7/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L7/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Multiple-valve arrangements </text><reference><text>with valves surrounding working cylinder or piston <class-ref scheme="cpc">F01L7/04</class-ref>; specially for two-stroke engines <class-ref scheme="cpc">F01L7/12</class-ref></text></reference></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L7/16" definition-exists="false" ipc-concordant="F01L7/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L7/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Sealing or packing arrangements specially therefor</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L7/18" definition-exists="false" ipc-concordant="F01L7/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>F01L7/18</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>Component parts, details, or accessories not provided for in preceding subgroups of this group</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F01L9/00" definition-exists="true" ipc-concordant="F01L9/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L9/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Valve-gear or valve arrangements actuated non-mechanically</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L9/10" definition-exists="true" ipc-concordant="F01L9/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F01L9/10</classification-symbol><class-title date-revised="2021-01-01"> <title-part><text>by fluid means, e.g. hydraulic</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F01L9/11" definition-exists="false" ipc-concordant="F01L9/11" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F01L9/11</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>in which the action of a cam is being transmitted to a valve by a liquid column</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F01L9/12" definition-exists="false" ipc-concordant="F01L9/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F01L9/12</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>with a liquid chamber between a piston actuated by a cam and a piston acting on a valve stem</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F01L9/14" definition-exists="false" ipc-concordant="F01L9/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F01L9/14</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>the volume of the chamber being variable, e.g. for varying the lift or the timing of a valve</text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F01L9/16" definition-exists="false" ipc-concordant="F01L9/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F01L9/16</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Pneumatic means</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F01L9/18" definition-exists="false" ipc-concordant="F01L9/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F01L9/18</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Means for increasing the initial opening force on the valve</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L9/20" definition-exists="true" ipc-concordant="F01L9/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F01L9/20</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>by electric means</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F01L9/21" definition-exists="false" ipc-concordant="F01L9/21" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F01L9/21</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>actuated by solenoids</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="F01L9/2103" definition-exists="false" ipc-concordant="F01L9/21" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F01L2009/2103</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>comprising one coil</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="F01L9/2105" definition-exists="false" ipc-concordant="F01L9/21" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F01L2009/2105</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>comprising two or more coils</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="F01L9/2107" definition-exists="false" ipc-concordant="F01L9/21" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F01L2009/2107</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>being disposed coaxially to the armature shaft</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="F01L9/2109" definition-exists="false" ipc-concordant="F01L9/21" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F01L2009/2109</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>The armature being articulated perpendicularly to the coils axes</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="F01L9/2115" definition-exists="false" ipc-concordant="F01L9/21" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F01L2009/2115</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Moving coil actuators</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="F01L9/2117" definition-exists="false" ipc-concordant="F01L9/21" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F01L2009/2117</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Floating actuators for varying the valve stroke</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="F01L9/2125" definition-exists="false" ipc-concordant="F01L9/21" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F01L2009/2125</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Shaft and armature construction</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="F01L9/2126" definition-exists="false" ipc-concordant="F01L9/21" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F01L2009/2126</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Arrangements for amplifying the armature stroke</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="F01L9/2128" definition-exists="false" ipc-concordant="F01L9/21" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F01L2009/2128</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Core and coil construction</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="F01L9/213" definition-exists="false" ipc-concordant="F01L9/21" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F01L2009/213</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Casing construction</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="F01L9/2132" definition-exists="false" ipc-concordant="F01L9/21" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F01L2009/2132</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Biasing means</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="F01L9/2134" definition-exists="false" ipc-concordant="F01L9/21" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F01L2009/2134</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Helical springs</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="F01L9/2136" definition-exists="false" ipc-concordant="F01L9/21" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F01L2009/2136</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Two opposed springs for intermediate resting position of the armature</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="F01L9/2138" definition-exists="false" ipc-concordant="F01L9/21" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F01L2009/2138</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Torsion springs</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="F01L9/214" definition-exists="false" ipc-concordant="F01L9/21" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F01L2009/214</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Pneumatic springs</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="F01L9/2142" definition-exists="false" ipc-concordant="F01L9/21" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F01L2009/2142</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Means for varying the spring bias</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="F01L9/2144" definition-exists="false" ipc-concordant="F01L9/21" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F01L2009/2144</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Means for connecting springs to valve or anchor</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="F01L9/2146" definition-exists="false" ipc-concordant="F01L9/21" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F01L2009/2146</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Latching means</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="F01L9/2151" definition-exists="false" ipc-concordant="F01L9/21" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F01L2009/2151</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Damping means</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="F01L9/2153" definition-exists="false" ipc-concordant="F01L9/21" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F01L2009/2153</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Means for counteracting cylinder pressure</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="F01L9/2155" definition-exists="false" ipc-concordant="F01L9/21" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F01L2009/2155</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Lash adjusting means</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="F01L9/2163" definition-exists="false" ipc-concordant="F01L9/21" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F01L2009/2163</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Connectors</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="F01L9/2167" definition-exists="false" ipc-concordant="F01L9/21" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F01L2009/2167</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Sensing means</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="F01L9/2169" definition-exists="false" ipc-concordant="F01L9/21" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F01L2009/2169</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Position sensors</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="F01L9/2171" definition-exists="false" ipc-concordant="F01L9/21" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F01L2009/2171</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Vibration sensors</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="F01L9/2174" definition-exists="false" ipc-concordant="F01L9/21" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F01L2009/2174</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Flux sensors</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="F01L9/2176" definition-exists="false" ipc-concordant="F01L9/21" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F01L2009/2176</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Spring force sensors</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F01L9/24" definition-exists="false" ipc-concordant="F01L9/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F01L9/24</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Piezo-electric actuators</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F01L9/25" definition-exists="false" ipc-concordant="F01L9/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F01L2009/25</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Mixed arrangement with both mechanically and electromagnetically actuated valves</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F01L9/26" definition-exists="false" ipc-concordant="F01L9/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F01L9/26</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Driving circuits therefor</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L9/30" definition-exists="false" ipc-concordant="F01L9/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F01L9/30</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Arrangements for setting the actuator position, e.g. the initial position</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L9/40" definition-exists="false" ipc-concordant="F01L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F01L9/40</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Methods of operation thereof</text></title-part><title-part><text>Control of valve actuation, e.g. duration or lift</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F01L9/408" definition-exists="false" ipc-concordant="F01L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F01L2009/408</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Engine starting</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="F01L9/4082" definition-exists="false" ipc-concordant="F01L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F01L2009/4082</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>in normal conditions</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F01L9/409" definition-exists="false" ipc-concordant="F01L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F01L2009/409</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Determination of valve speed</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F01L9/4092" definition-exists="false" ipc-concordant="F01L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F01L2009/4092</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Determination of valve timing during particular working conditions, e.g. deceleration</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F01L9/4094" definition-exists="false" ipc-concordant="F01L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F01L2009/4094</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Engine stopping; Engine stall</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F01L9/4096" definition-exists="false" ipc-concordant="F01L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F01L2009/4096</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>relating to sticking duration</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F01L9/4098" definition-exists="false" ipc-concordant="F01L9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F01L2009/4098</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>relating to gap between armature shaft and valve stem end</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F01L11/00" definition-exists="true" ipc-concordant="F01L11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L11/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Valve arrangements in working piston or piston-rod</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L11/02" definition-exists="false" ipc-concordant="F01L11/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L11/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in piston</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F01L11/04" definition-exists="false" ipc-concordant="F01L11/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L11/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>operated by movement of connecting-rod</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F01L11/06" definition-exists="false" ipc-concordant="F01L11/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L11/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>operating oscillatory valve</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F01L13/00" definition-exists="true" ipc-concordant="F01L13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L13/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L13/0005" definition-exists="true" ipc-concordant="F01L13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L13/0005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Deactivating valves</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F01L13/001" definition-exists="false" ipc-concordant="F01L13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2013/001</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Deactivating cylinders</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L13/0015" definition-exists="false" ipc-concordant="F01L13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L13/0015</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F01L13/0021" definition-exists="false" ipc-concordant="F01L13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L13/0021</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by modification of rocker arm ratio</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F01L13/0026" definition-exists="false" ipc-concordant="F01L13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L13/0026</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by means of an eccentric</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F01L13/0031" definition-exists="false" ipc-concordant="F01L13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L13/0031</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by modification of tappet or pushrod length</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F01L13/0036" definition-exists="false" ipc-concordant="F01L13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L13/0036</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F01L13/0042" definition-exists="false" ipc-concordant="F01L13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L13/0042</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with cams being profiled in axial and radial direction</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F01L13/0047" definition-exists="false" ipc-concordant="F01L13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L13/0047</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the movement of the valves resulting from the sum of the simultaneous actions of at least two cams, the cams being independently variable in phase in respect of each other</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="F01L13/0052" definition-exists="false" ipc-concordant="F01L13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2013/0052</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with cams provided on an axially slidable sleeve</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F01L13/0057" definition-exists="false" ipc-concordant="F01L13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L13/0057</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by splittable or deformable cams</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F01L13/0063" definition-exists="false" ipc-concordant="F01L13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L13/0063</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="F01L13/0068" definition-exists="false" ipc-concordant="F01L13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2013/0068</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with an oscillating cam acting on the valve of the &quot;BMW-Valvetronic&quot; type</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="F01L13/0073" definition-exists="false" ipc-concordant="F01L13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2013/0073</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with an oscillating cam acting on the valve of the &quot;Delphi&quot; type</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F01L13/0078" definition-exists="false" ipc-concordant="F01L13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2013/0078</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by modification of cam contact point by axially displacing the camshaft</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F01L13/0084" definition-exists="false" ipc-concordant="F01L13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2013/0084</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by modification of cam contact point by radially displacing the camshaft</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F01L13/0089" definition-exists="false" ipc-concordant="F01L13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2013/0089</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with means for delaying valve closing</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="F01L13/0094" definition-exists="false" ipc-concordant="F01L13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2013/0094</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with switchable clamp for keeping valve open</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L13/02" definition-exists="false" ipc-concordant="F01L13/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L13/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for reversing</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L13/04" definition-exists="false" ipc-concordant="F01L13/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L13/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for starting by means of fluid pressure</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L13/06" definition-exists="true" ipc-concordant="F01L13/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L13/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for braking</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F01L13/065" definition-exists="false" ipc-concordant="F01L13/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L13/065</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Compression release engine retarders of the &quot;Jacobs Manufacturing&quot; type</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L13/08" definition-exists="false" ipc-concordant="F01L13/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L13/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for decompression, e.g. during starting</text></title-part><title-part><text>for changing compression ratio</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F01L13/085" definition-exists="false" ipc-concordant="F01L13/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L13/085</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the valve-gear having an auxiliary cam protruding from the main cam profile</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F01L13/10" definition-exists="false" ipc-concordant="F01L13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2013/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Auxiliary actuators for variable valve timing</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F01L13/101" definition-exists="false" ipc-concordant="F01L13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2013/101</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Electromagnets</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F01L13/103" definition-exists="false" ipc-concordant="F01L13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2013/103</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Electric motors</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F01L13/105" definition-exists="false" ipc-concordant="F01L13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2013/105</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Hydraulic motors</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F01L13/106" definition-exists="false" ipc-concordant="F01L13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2013/106</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Pneumatic motors</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F01L13/108" definition-exists="false" ipc-concordant="F01L13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2013/108</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Centrifugal force</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F01L13/11" definition-exists="false" ipc-concordant="F01L13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2013/11</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Sensors for variable valve timing</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F01L13/111" definition-exists="false" ipc-concordant="F01L13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2013/111</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Camshafts position or phase</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F01L13/113" definition-exists="false" ipc-concordant="F01L13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2013/113</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>crankshafts position</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F01L13/115" definition-exists="false" ipc-concordant="F01L13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2013/115</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Pressure</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F01L13/116" definition-exists="false" ipc-concordant="F01L13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2013/116</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Temperature</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F01L13/118" definition-exists="false" ipc-concordant="F01L13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2013/118</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Valve lift</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="true" level="6" additional-only="false" sort-key="F01L15/00" date-revised="2021-01-01" status="published"><classification-symbol>F01L15/00</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Valve-gear or valve arrangements specially adapted for steam engines, or specially adapted for other positive-displacement machines or engines with variable working-fluid distribution</text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph>Groups <class-ref scheme="cpc">F01L15/00</class-ref> - <class-ref scheme="cpc">F01L31/00</class-ref> cover:<subnote type="bullet"><note-paragraph>valve drive or means external to valves for adjustment during operation;</note-paragraph><note-paragraph>tripping-gear;</note-paragraph><note-paragraph>reversing-gear;</note-paragraph><note-paragraph>use of pistons or piston-rods as valves or as valve-supporting elements;</note-paragraph><note-paragraph>valve-gear or valve arrangements peculiar to free-piston machines or engines.</note-paragraph></subnote></note-paragraph><note-paragraph>Groups <class-ref scheme="cpc">F01L15/00</class-ref> - <class-ref scheme="cpc">F01L31/00</class-ref> do not fully cover subject matter restricted to rotary, oscillatory, or lift-valve gear or valve arrangements, which is covered by group <class-ref scheme="cpc">F01L33/00</class-ref> or <class-ref scheme="cpc">F01L35/00</class-ref>.</note-paragraph></note></notes-and-warnings>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F01L15/00" definition-exists="false" ipc-concordant="F01L15/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F01L15/00</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Valve-gear or valve arrangements, e.g. with reciprocatory slide valves, other than provided for in groups <class-ref scheme="cpc">F01L17/00</class-ref> - <class-ref scheme="cpc">F01L29/00</class-ref> </text><reference><text>valve drive or external valve-adjustment during operation, tripping-gear or tripping of valves <class-ref scheme="cpc">F01L31/00</class-ref></text></reference></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L15/02" definition-exists="false" ipc-concordant="F01L15/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L15/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with valves other than cylindrical, sleeve, or part-annularly-shaped, e.g. flat D-valves</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F01L15/04" definition-exists="false" ipc-concordant="F01L15/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L15/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>main valve being combined with auxiliary valve </text><reference><text>of drag valve type <class-ref scheme="cpc">F01L15/10</class-ref></text></reference></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F01L15/06" definition-exists="false" ipc-concordant="F01L15/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L15/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of Meyer or Rider type, i.e. in which the expansion is varied at the expansion valve itself</text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L15/08" definition-exists="false" ipc-concordant="F01L15/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>F01L15/08</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>with cylindrical, sleeve, or part-annularly-shaped valves</text></title-part><title-part><text>Such main valves combined with auxiliary valves</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L15/10" definition-exists="false" ipc-concordant="F01L15/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L15/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with main slide valve and auxiliary valve dragged thereby</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L15/12" definition-exists="false" ipc-concordant="F01L15/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L15/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by having means for effecting pressure equilibrium between two different cylinder spaces at idling</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L15/14" definition-exists="false" ipc-concordant="F01L15/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L15/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements with several co-operating main valves, e.g. reciprocatory and rotary</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F01L15/16" definition-exists="false" ipc-concordant="F01L15/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L15/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with reciprocatory slide valves only</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L15/18" definition-exists="false" ipc-concordant="F01L15/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>F01L15/18</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>Valves arrangements not provided for in preceding subgroups of this main group</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L15/20" definition-exists="false" ipc-concordant="F01L15/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>F01L15/20</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>Component parts, details, or accessories, not provided for in preceding subgroups of this main group</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F01L17/00" definition-exists="false" ipc-concordant="F01L17/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L17/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Slide valve-gear or valve arrangements with cylindrical, sleeve, or part annularly-shaped valves surrounding working cylinder or piston</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L17/02" definition-exists="false" ipc-concordant="F01L17/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L17/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Drive or adjustment during operation, peculiar thereto, e.g. for reciprocating and oscillating movements or for several valves one inside the other</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F01L19/00" definition-exists="false" ipc-concordant="F01L19/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L19/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Slide valve-gear or valve arrangements with reciprocatory and other movement of same valve, other than provided for in <class-ref scheme="cpc">F01L17/00</class-ref>, e.g. longitudinally of working cylinder and in cross direction</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L19/02" definition-exists="false" ipc-concordant="F01L19/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L19/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Drive or adjustment during operation, peculiar thereto</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F01L21/00" definition-exists="false" ipc-concordant="F01L21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>F01L21/00</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>Use of working pistons or pistons-rods as fluid-distributing valves or as valve-supporting elements, e.g. in free-piston machines</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L21/02" definition-exists="false" ipc-concordant="F01L21/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L21/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Piston or piston-rod used as valve members </text><CPC-specific-text><reference><text><class-ref scheme="cpc">F01L25/066</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L21/04" definition-exists="false" ipc-concordant="F01L21/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L21/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Valves arranged in or on piston or piston-rod</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F01L23/00" definition-exists="true" ipc-concordant="F01L23/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F01L23/00</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Valves controlled by impact by piston, e.g. in free-piston machines</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F01L25/00" definition-exists="true" ipc-concordant="F01L25/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L25/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Drive, or adjustment during the operation, or distribution or expansion valves by non-mechanical means</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L25/02" definition-exists="false" ipc-concordant="F01L25/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L25/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by fluid means</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F01L25/04" definition-exists="false" ipc-concordant="F01L25/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L25/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by working-fluid of machine or engine, e.g. free-piston machine</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F01L25/06" definition-exists="false" ipc-concordant="F01L25/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>F01L25/06</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>Arrangements with main and auxiliary valves, at least one of them being fluid-driven</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F01L25/063" definition-exists="false" ipc-concordant="F01L25/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L25/063</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the auxiliary valve being actuated by the working motor-piston or piston-rod</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F01L25/066" definition-exists="false" ipc-concordant="F01L25/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L25/066</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>piston or piston-rod being used as auxiliary valve</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L25/08" definition-exists="false" ipc-concordant="F01L25/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L25/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by electric or magnetic means</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F01L27/00" definition-exists="true" ipc-concordant="F01L27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>F01L27/00</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>Distribution or expansion valve-gear peculiar to free-piston machines or engines and not provided for in <class-ref scheme="cpc">F01L21/00</class-ref>&#160;-&#160;<class-ref scheme="cpc">F01L25/00</class-ref></text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L27/02" definition-exists="false" ipc-concordant="F01L27/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L27/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the machine or engine having rotary or oscillatory valves</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L27/04" definition-exists="false" ipc-concordant="F01L27/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L27/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Delayed-action controls, e.g. of cataract or dashpot type</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F01L29/00" definition-exists="false" ipc-concordant="F01L29/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F01L29/00</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Reversing-gear</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L29/02" definition-exists="false" ipc-concordant="F01L29/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L29/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by displacing eccentric</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L29/04" definition-exists="false" ipc-concordant="F01L29/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L29/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by links or guide rods</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L29/06" definition-exists="false" ipc-concordant="F01L29/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L29/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by interchanging inlet and exhaust ports</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L29/08" definition-exists="false" ipc-concordant="F01L29/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L29/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>specially for rotary or oscillatory valves</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L29/10" definition-exists="false" ipc-concordant="F01L29/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L29/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details, e.g. drive</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F01L29/12" definition-exists="false" ipc-concordant="F01L29/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L29/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Powered reverse gear</text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F01L31/00" definition-exists="false" ipc-concordant="F01L31/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>F01L31/00</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Valve drive, valve adjustment during operation, or other valve control, not provided for in groups <class-ref scheme="cpc">F01L15/00</class-ref> - <class-ref scheme="cpc">F01L29/00</class-ref> </text><reference><text>sensing elements measuring the variable or condition to be controlled or regulated <class-ref scheme="cpc">F01B25/04</class-ref></text></reference></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L31/02" definition-exists="false" ipc-concordant="F01L31/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L31/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with tripping-gear </text><reference><text>for oscillatory valves <class-ref scheme="cpc">F01L31/06</class-ref></text></reference></title-part><title-part><text>Tripping of valves</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F01L31/04" definition-exists="false" ipc-concordant="F01L31/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L31/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with positively-driven trip levers</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L31/06" definition-exists="false" ipc-concordant="F01L31/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L31/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with tripping-gear specially for oscillatory valves</text></title-part><title-part><text>Oscillatory tripping-valves, e.g. of Corliss type</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L31/08" definition-exists="false" ipc-concordant="F01L31/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L31/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Valve drive or valve adjustment, apart from tripping aspects</text></title-part><title-part><text>Positively-driven gear</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F01L31/10" definition-exists="false" ipc-concordant="F01L31/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L31/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the drive being effected by eccentrics </text><reference><text><class-ref scheme="cpc">F01L31/14</class-ref> takes precedence</text></reference></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F01L31/12" definition-exists="false" ipc-concordant="F01L31/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L31/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Valve adjustment by displacing eccentric</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F01L31/16" definition-exists="false" ipc-concordant="F01L31/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L31/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the drive being effected by specific means other than eccentric, e.g. cams</text></title-part><title-part><text>Valve adjustment in connection with such drives</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F01L31/18" definition-exists="false" ipc-concordant="F01L31/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L31/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>specially for rotary or oscillatory valves</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L33/02" definition-exists="false" ipc-concordant="F01L33/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L33/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>rotary</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L33/04" definition-exists="false" ipc-concordant="F01L33/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L33/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>oscillatory</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L35/02" definition-exists="false" ipc-concordant="F01L35/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L35/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Valves</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F01L35/04" definition-exists="false" ipc-concordant="F01L35/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L35/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements of valves in the machine or engine, e.g. relative to working cylinder</text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="true" level="6" additional-only="true" sort-key="F01L201/00" date-revised="2013-01-01" status="published"><classification-symbol>F01L2201/00</classification-symbol>
<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="F01L201/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2201/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electronic control systems</text></title-part><title-part><text>Apparatus or methods therefor</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="F01L250/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2250/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Camshaft drives characterised by their transmission means</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F01L250/02" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2250/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the camshaft being driven by chains</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F01L250/04" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2250/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the camshaft being driven by belts</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F01L250/06" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2250/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the camshaft being driven by gear wheels</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="F01L301/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>F01L2301/00</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Using particular materials</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F01L303/01" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>F01L2303/01</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Tools for producing, mounting or adjusting, e.g. some part of the distribution</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F01L303/02" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>F01L2303/02</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Initial camshaft settings</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="F01L305/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>F01L2305/00</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Valve arrangements comprising rollers</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F01L305/02" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>F01L2305/02</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Mounting of rollers</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="F01L311/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>F01L2311/00</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Differential gears located between crankshafts and camshafts for varying the timing of valves</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="F01L313/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>F01L2313/00</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Rotary valve drives</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="F01L710/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2710/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Control of valve gear, speed or power</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F01L710/003" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2710/003</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Control of valve gear for two stroke engines</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F01L710/006" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2710/006</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Safety devices therefor</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="F01L740/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2740/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Control of slide-valve gear</text></title-part><title-part><text>Control pistons</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F01L740/003" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2740/003</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>more than one slide-valve, e.g. for four stroke engines</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F01L740/006" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2740/006</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>more than one slide-valve, e.g. for two stroke engines</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="F01L750/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2750/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Control of valve gear for four stroke engines directly driven by the crankshaft</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="F01L760/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2760/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Control of valve gear to facilitate reversing, starting, braking of four stroke engines</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F01L760/001" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2760/001</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for starting four stroke engines</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F01L760/002" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2760/002</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for reversing or starting four stroke engines</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F01L760/003" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F01L2760/003</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for switching to compressor action in order to brake</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F01L760/008" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>F01L2760/008</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>for reversing and restarting two stroke engines</text></title-part></class-title></classification-item></classification-item>
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