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)
Introduced: September 1968
Description
F17B covers gas storage devices with adjustable or variable internal volume, designed to accommodate fluctuating gas quantities while maintaining controlled pressure conditions. These systems typically employ movable walls, pistons, floating elements, or collapsible chambers to expand or contract based on gas demand and supply. Applications include gas holders for industrial distribution networks, buffer tanks in manufacturing processes, and pressure regulation systems where constant volume storage is impractical. This classification excludes fixed-capacity gas containers and pressure vessels that maintain constant volume (covered by F17C).
Title
Titles differ between systems:
IPC: GAS-HOLDERS OF VARIABLE CAPACITY
CPC: 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)
Full Title
Full titles differ between systems:
GAS-HOLDERS OF VARIABLE CAPACITY
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)
IPC and CPC are identically structured here. All 1 subcodes exist in both systems.
1 shared codes have differing titles between IPC and CPC.
Child Classifications
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- F17B 1/00 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) IPC+CPC Available in IPC and CPC
Top Applicants
Top Applicants (IPC)
Class F17,2013–2023, worldwide · Source: EPO PATSTAT
- DAEWOO SHIPBUILDING & MARINE ENGINEERING COMPANY KR 1,622
- GAZ TRANSPORT ET TECHNIGAZ FR 1,588
- L'AIR LIQUIDE SOCIETE ANONYME POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE FR 1,470
- SAMSUNG HEAVY INDUSTRIES KR 1,287
- HYUNDAI HEAVY INDUSTRIES COMPANY KR 989
- TOYOTA MOTOR CORPORATION 830
- LINDE DE 703
- SINOPEC (CHINA PETROCHEMICAL CORPORATION) 666
- ROBERT BOSCH DE 654
- BMW (BAYERISCHE MOTOREN WERKE) DE 511
Top Applicants (CPC)
Class F17,2013–2023, worldwide · Source: EPO PATSTAT
- GAZ TRANSPORT ET TECHNIGAZ FR 1,718
- L'AIR LIQUIDE SOCIETE ANONYME POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE FR 1,633
- DAEWOO SHIPBUILDING & MARINE ENGINEERING COMPANY KR 1,570
- SAMSUNG HEAVY INDUSTRIES KR 1,174
- HYUNDAI HEAVY INDUSTRIES COMPANY KR 988
- LINDE DE 757
- ROBERT BOSCH DE 696
- BMW (BAYERISCHE MOTOREN WERKE) DE 523
- TOYOTA MOTOR CORPORATION JP 515
- KAWASAKI HEAVY IND JP 456