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72 lines
37 KiB
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72 lines
37 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
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<class-scheme publication-date="2023-02-01" scheme-type="cpc" publication-type="official">
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<classification-item breakdown-code="false" not-allocatable="true" level="5" additional-only="false" sort-key="F22D" definition-exists="true" date-revised="2019-01-01" status="published"><classification-symbol>F22D</classification-symbol><class-title date-revised="2019-01-01"><title-part><text>PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION</text></title-part><title-part><text>FEED-WATER SUPPLY FOR STEAM GENERATION</text></title-part><title-part><text>CONTROLLING WATER LEVEL FOR STEAM GENERATION</text></title-part><title-part><text>AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph>In this subclass non-limiting references (in the sense of paragraph 39 of the Guide to the IPC) may still be displayed in the scheme.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="true" level="6" additional-only="false" sort-key="F22D1/00" date-revised="2013-01-01" status="published"><classification-symbol>F22D1/00</classification-symbol>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F22D1/00" definition-exists="true" ipc-concordant="F22D1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D1/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Feed-water heaters, i.e. economisers or like preheaters</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F22D1/003" definition-exists="false" ipc-concordant="F22D1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D1/003</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Feed-water heater systems </text><reference><text><class-ref scheme="cpc">F22D1/325</class-ref>, <class-ref scheme="cpc">F22D1/36</class-ref> and <class-ref scheme="cpc">F22D1/40</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F22D1/006" definition-exists="false" ipc-concordant="F22D1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D1/006</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with heating tubes </text><reference><text><class-ref scheme="cpc">F22D1/24</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F22D1/02" definition-exists="false" ipc-concordant="F22D1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D1/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with water tubes arranged in the boiler furnace, fire tubes, or flue ways </text><reference><text>heat-exchange tubes in general <class-ref scheme="cpc">F28F</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F22D1/04" definition-exists="false" ipc-concordant="F22D1/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D1/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the tubes having plain outer surfaces, e.g. in vertical arrangement</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F22D1/06" definition-exists="false" ipc-concordant="F22D1/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D1/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in horizontal arrangement</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="F22D1/08" definition-exists="false" ipc-concordant="F22D1/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D1/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the tubes having fins, ribs, gills, corrugations, or the like on their outer surfaces, e.g. in vertical arrangement</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F22D1/10" definition-exists="false" ipc-concordant="F22D1/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D1/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in horizontal arrangement </text><reference><text>hollow fire-bars, grates, or the like used as water tubes <class-ref scheme="cpc">F23H3/02</class-ref></text></reference></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="F22D1/12" definition-exists="false" ipc-concordant="F22D1/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D1/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Control devices, e.g. for regulating steam temperature</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F22D1/14" definition-exists="false" ipc-concordant="F22D1/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D1/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Safety or venting devices </text><reference><text>safety devices for boilers in general <class-ref scheme="cpc">F22B37/42</class-ref></text></reference></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="F22D1/16" definition-exists="false" ipc-concordant="F22D1/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D1/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with water tubes arranged otherwise than in the boiler furnace, fire tubes, or flue ways</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F22D1/18" definition-exists="false" ipc-concordant="F22D1/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D1/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>and heated indirectly</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F22D1/20" definition-exists="false" ipc-concordant="F22D1/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D1/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>and directly connected to boilers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F22D1/22" definition-exists="false" ipc-concordant="F22D1/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D1/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>and provided for rotary movements</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="F22D1/24" definition-exists="false" ipc-concordant="F22D1/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D1/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with fire tubes or flue ways traversing feed-water vessels</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F22D1/26" definition-exists="false" ipc-concordant="F22D1/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D1/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with means, other than tubes, to separate water and heating medium, e.g. bulk heaters without internal flues or tubes, jacketted smoke-boxes or flue or flues</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F22D1/28" definition-exists="false" ipc-concordant="F22D1/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D1/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for direct heat transfer, e.g. by mixing water and steam</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F22D1/30" definition-exists="false" ipc-concordant="F22D1/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D1/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with stages, steps, baffles, dishes, circular troughs, or other means to cause interrupted or cascading fall of water </text><reference><text>de-aeration apparatus <class-ref scheme="cpc">C02F</class-ref></text></reference></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="F22D1/32" definition-exists="false" ipc-concordant="F22D1/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D1/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>arranged to be heated by steam, e.g. bled from turbines</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F22D1/325" definition-exists="false" ipc-concordant="F22D1/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D1/325</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Schematic arrangements or control devices therefor</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F22D1/34" definition-exists="false" ipc-concordant="F22D1/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D1/34</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>and returning condensate to boiler with main feed supply</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="F22D1/36" definition-exists="false" ipc-concordant="F22D1/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D1/36</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Water and air preheating systems</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F22D1/38" definition-exists="false" ipc-concordant="F22D1/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D1/38</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Constructional features of water and air preheating systems</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="F22D1/40" definition-exists="false" ipc-concordant="F22D1/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D1/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Combinations of exhaust-steam and smoke-gas preheaters </text><reference><text>for locomotives <class-ref scheme="cpc">F22D1/42</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F22D1/42" definition-exists="false" ipc-concordant="F22D1/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D1/42</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>specially adapted for locomotives</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F22D1/44" definition-exists="false" ipc-concordant="F22D1/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D1/44</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Smoke-gas preheaters</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F22D1/46" definition-exists="false" ipc-concordant="F22D1/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D1/46</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Exhaust-steam preheaters</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F22D1/48" definition-exists="false" ipc-concordant="F22D1/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D1/48</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details</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="F22D1/50" definition-exists="false" ipc-concordant="F22D1/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D1/50</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>incorporating thermal de-aeration of feed-water </text><reference><text>de-aeration produced in the course of direct heat transfer <class-ref scheme="cpc">F22D1/28</class-ref>; thermal de-aeration of water <u>per se</u> <class-ref scheme="cpc">B01D19/00</class-ref>, <class-ref scheme="cpc">C02F1/20</class-ref>; valves for venting <class-ref scheme="cpc">F16K24/04</class-ref></text></reference></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F22D3/00" definition-exists="true" ipc-concordant="F22D3/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D3/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Accumulators for preheated water</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F22D3/02" definition-exists="false" ipc-concordant="F22D3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D3/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>arranged within combustion chambers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F22D3/04" definition-exists="false" ipc-concordant="F22D3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D3/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>combined with steam accumulators</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F22D3/06" definition-exists="false" ipc-concordant="F22D3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D3/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>directly connected to boilers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F22D3/08" definition-exists="false" ipc-concordant="F22D3/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D3/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>specially adapted for locomotives </text><reference><text>locomotives boilers <class-ref scheme="cpc">F22B13/06</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F22D3/10" definition-exists="false" ipc-concordant="F22D3/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D3/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Control devices </text><reference><text>controlling water feed to boilers, or water level <class-ref scheme="cpc">F22D5/00</class-ref></text></reference></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F22D5/00" definition-exists="true" ipc-concordant="F22D5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D5/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Controlling water feed or water level</text></title-part><title-part><text>Automatic water feeding or water-level regulators </text><reference><text>steam traps <class-ref scheme="cpc">F16T</class-ref>; measuring or indicating instruments <class-ref scheme="cpc">G01</class-ref>; for indicating water level <class-ref scheme="cpc">G01F</class-ref>; level control in general <class-ref scheme="cpc">G05D9/00</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F22D5/02" definition-exists="false" ipc-concordant="F22D5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D5/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with an intermediate compartment from which the water is fed by gravity after mechanically moving the compartment, the movement being controlled according to water level</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F22D5/04" definition-exists="false" ipc-concordant="F22D5/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D5/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with pivoting buckets</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F22D5/06" definition-exists="false" ipc-concordant="F22D5/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D5/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with receptacles external to, but in free communication with, the boilers and adapted to move up and down in accordance with change in water level</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F22D5/08" definition-exists="false" ipc-concordant="F22D5/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D5/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with float-actuated valves</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F22D5/10" definition-exists="false" ipc-concordant="F22D5/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D5/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>and with pistons or membranes unitary with the feed inlet valves</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F22D5/12" definition-exists="false" ipc-concordant="F22D5/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D5/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>and with dipping tubes</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="F22D5/14" definition-exists="false" ipc-concordant="F22D5/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D5/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>responsive to thermal expansion and contraction, e.g. of solid elements</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F22D5/16" definition-exists="false" ipc-concordant="F22D5/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D5/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of fluids</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="F22D5/18" definition-exists="false" ipc-concordant="F22D5/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D5/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for varying the speed or delivery pressure of feed pumps</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F22D5/20" definition-exists="false" ipc-concordant="F22D5/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D5/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>without floats</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F22D5/22" definition-exists="false" ipc-concordant="F22D5/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D5/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with floats</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="F22D5/24" definition-exists="false" ipc-concordant="F22D5/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D5/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with electric switches</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F22D5/26" definition-exists="false" ipc-concordant="F22D5/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D5/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Automatic feed-control systems </text><reference><text>automatic safety devices <class-ref scheme="cpc">F22B37/42</class-ref>; controlling in general <class-ref scheme="cpc">G05</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F22D5/28" definition-exists="false" ipc-concordant="F22D5/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D5/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>responsive to amount of steam withdrawn</text></title-part><title-part><text>responsive to steam pressure</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F22D5/30" definition-exists="false" ipc-concordant="F22D5/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D5/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>responsive to both water level and amount of steam withdrawn or steam pressure</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F22D5/32" definition-exists="false" ipc-concordant="F22D5/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D5/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>influencing the speed or delivery pressure of the feed pumps</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F22D5/34" definition-exists="false" ipc-concordant="F22D5/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D5/34</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Applications of valves </text><reference><text>valves <u>per se</u> <class-ref scheme="cpc">F16K</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F22D5/36" definition-exists="false" ipc-concordant="F22D5/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D5/36</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for feeding a number of steam boilers designed for different ranges of temperature and pressure</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F22D7/00" definition-exists="true" ipc-concordant="F22D7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D7/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Auxiliary devices for promoting water circulation </text><reference><text>adaptation of boilers for promoting water circulation <class-ref scheme="cpc">F22B37/34</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F22D7/02" definition-exists="false" ipc-concordant="F22D7/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D7/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Saddles or like directing plates fitted to furnace tubes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F22D7/04" definition-exists="false" ipc-concordant="F22D7/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D7/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Injectors for water or steam</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F22D7/06" definition-exists="false" ipc-concordant="F22D7/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D7/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Rotary devices, e.g. propellers</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F22D7/08" definition-exists="false" ipc-concordant="F22D7/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D7/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements of pumps, e.g. outside the boilers</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F22D7/10" definition-exists="false" ipc-concordant="F22D7/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D7/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>within the boilers</text></title-part></class-title></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="F22D7/12" definition-exists="false" ipc-concordant="F22D7/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D7/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Control devices</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F22D7/14" definition-exists="false" ipc-concordant="F22D7/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D7/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>specially adapted for locomotive boilers</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F22D11/00" definition-exists="true" ipc-concordant="F22D11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D11/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Feed-water supply not provided for in other main groups</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F22D11/003" definition-exists="false" ipc-concordant="F22D11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D11/003</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Emergency feed-water supply </text><reference><text>safety devices for boilers in general <class-ref scheme="cpc">F22B37/42</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F22D11/006" definition-exists="false" ipc-concordant="F22D11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D11/006</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements of feedwater cleaning with a boiler</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F22D11/02" definition-exists="false" ipc-concordant="F22D11/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D11/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements of feed-water pumps </text><reference><text><class-ref scheme="cpc">F22D11/06</class-ref> takes precedence; pumps <u>per se</u> <class-ref scheme="cpc">F04</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F22D11/04" definition-exists="false" ipc-concordant="F22D11/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D11/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with means to eliminate steam formation</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F22D11/06" definition-exists="false" ipc-concordant="F22D11/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F22D11/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for returning condensate to boiler</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item></classification-item></class-scheme> |