Pilot-control safety valve

Details Pilot-control safety valve Pilot-control safety valve

1988-08-19

1989-10-10

Walton, George L.

Valves and valve actuation

Fluid actuated or retarded

Flexible wall expansible chamber reciprocating valve actuator

251 615, 2513353, F16K 31126

Patent

active

048726397

ABSTRACT:
A piloted-safety valve in which a shaft is guided in a guide sleeve in the alve body and both the shaft and the guide sleeve have collars to which ends of an extensible metal jacket are sealingly anchored. The jacket, e.g. a bellows, is in a compressed state when the valve is closed.

REFERENCES:
patent: 2654394 (1953-10-01), Thorburn
patent: 2770251 (1956-11-01), Goddard et al.
patent: 2807421 (1957-09-01), Carlson, Jr.
patent: 2885173 (1959-05-01), Dobrick
patent: 3084901 (1963-04-01), Thorburn
patent: 3322142 (1967-05-01), Baumann
patent: 4214727 (1980-07-01), Baram
patent: 4431159 (1984-02-01), Stubbs
patent: 4515344 (1985-05-01), Gemignani
patent: 4526341 (1985-07-01), Thomas
patent: 4553564 (1985-11-01), Baram

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