Fluid handling – Systems – Flow path with serial valves and/or closures
Patent
1996-04-18
1997-11-11
Lee, Kevin
Fluid handling
Systems
Flow path with serial valves and/or closures
13762532, 251309, F16K 508
Patent
active
056853386
ABSTRACT:
A shut-off device, such as a valve or a cock, for pipelines and comprising a casing provided with a flow passageway. The casing is provided with an inlet and an outlet and at least one shut-off member provided with a cavity, the member being movable between a position in which the flow passageway is open and a position in which the flow passageway is closed. An auxiliary chamber is arranged in the casing and communicates with the cavity of the shut-off member. The auxiliary chamber is defined by a separate, almost non-resilient wall portion abutting an abutment face on the wall of the casing. A pressure-relieving passageway formed in the wall of the casing is arranged between an abutment face at the auxiliary chamber and the inlet or outlet of the shut-off device. As a result, a shut-off device having more simple structure than known shut-off devices is obtained.
REFERENCES:
patent: 611899 (1898-10-01), Freeman
patent: 911546 (1909-02-01), Shields
patent: 1130399 (1915-03-01), Gustafson
patent: 2045113 (1936-06-01), Ward
patent: 3101191 (1963-08-01), Wolfensperger
patent: 4658847 (1987-04-01), McCrone
patent: 4846212 (1989-07-01), Scobie et al.
patent: 5312086 (1994-05-01), Hollingworth
Brdr. Christensens-Haner A/S
Dowden Donald S.
Lee Kevin
LandOfFree
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