F17B

GAS-HOLDERS OF VARIABLE CAPACITY self-acting gas cut-off devices A47J27/62, G05D; flame traps A62C4/00; gas mixers B01F, F16K11/00, G05D11/00; construction or assembling of bulk storage containers employing civil-engineering techniques E04H7/00, gas compressors F04; valves F16K; damping pulsations in valves or pipes F16K, F16L; pipes F16L; stopping devices for gas mains F16L55/10; vessels adapted for storing compressed, liquefied, or solidified gases F17C; gas distribution systems F17D1/04; detecting leakage F17D5/02, G01M; supervising or alarm devices F17D5/02, G08B; control of combustion in burners F23N; gas flow or pressure regulators G05D

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.

F17B1/00

Gas-holders of variable capacity large containers in general B65D88/00; storing fluids in natural or artificial cavities or chambers in the earth B65G5/00

F17B1/007

with telescopically movable ring-shaped parts F17B1/10 takes precedence; sealing of rings F17B1/04

F17B1/013

with movables discs F17B1/10 takes precedence; sealing of discs F17B1/04

F17B1/02

Details

F17B1/04

Sealing devices for sliding parts in general F16J15/00

F17B1/06

using sealing liquids

F17B1/08

using resilient materials for packing, e.g. leather

F17B1/10

Guiding moving parts

F17B1/12

Gas admission or discharge arrangements

F17B1/14

Safety devices, e.g. prevention of excess pressure

F17B1/16

of wet type

F17B1/18

bell-shaped

F17B1/20

telescopic

F17B1/22

spirally-guided

F17B1/24

of dry type

F17B1/26

with flexible walls, e.g. bellows connection of valves to inflatable elastic bodies B60C29/00