WebCPC CPC COOPERATIVE PATENT CLASSIFICATION

F17B　GAS-HOLDERS OF VARIABLE CAPACITY (self-acting gas cut-off devices A47J 27/62, G05D; flame traps A62C 4/00; gas mixers B01F, F16K 11/00, G05D 11/00; construction or assembling of bulk storage containers employing civil-engineering techniques E04H 7/00, gas compressors F04; valves F16K; damping pulsations in valves or pipes F16K, F16L; pipes F16L; stopping devices for gas mains F16L 55/10; vessels adapted for storing compressed, liquefied, or solidified gases F17C; gas distribution systems F17D 1/04; detecting leakage F17D 5/02, G01M; supervising or alarm devices F17D 5/02, G08B; control of combustion in burners F23N; gas flow or pressure regulators G05D)

F17B 1/00 Gas-holders of variable capacity (large containers in general B65D 88/00; storing fluids in natural or artificial cavities or chambers in the earth B65G 5/00)

F17B 1/007 ・with telescopically movable ring-shaped parts (F17B 1/10 takes precedence; sealing of rings F17B 1/04)

F17B 1/013 ・with movables discs (F17B 1/10 takes precedence; sealing of discs F17B 1/04)

F17B 1/02 ・Details

F17B 1/04 ・・Sealing devices for sliding parts (in general F16J 15/00)

F17B 1/06 ・・・using sealing liquids

F17B 1/08 ・・・using resilient materials for packing, e.g. leather

F17B 1/10 ・・Guiding moving parts

F17B 1/12 ・・Gas admission or discharge arrangements

F17B 1/14 ・・Safety devices, e.g. prevention of excess pressure

F17B 1/16 ・of wet type

F17B 1/18 ・・bell-shaped

F17B 1/20 ・・telescopic

F17B 1/22 ・・・spirally-guided

F17B 1/24 ・of dry type

F17B 1/26 ・・with flexible walls, e.g. bellows (connection of valves to inflatable elastic bodies B60C 29/00)