Remote control choke

Details Remote control choke Remote control choke

1982-06-25

1984-07-24

Cohan, Alan

Valves and valve actuation

Fluid actuated or retarded

Piston type expansible chamber reciprocating valve actuator

251285, F16K 31363, F16K 5100

Patent

active

044614500

ABSTRACT:
There is provided a choke having an adjustable stop for absolutely limiting its degree of openness and a pressurized fluid-operated piston connected to the valve stem which normally is acted-on by differential pressure to maintain the valve open to the full extent permitted by engagement of the stem with the stop. A mechanical assistance device is provided for tending to close the valve and this device may be provided with a visual indicator from which, by inspection, one may tell the degree of openness of the valve. Remotely operable and on-site mechanical devices are shown provided for adjusting the absolute stop.

REFERENCES:
patent: 3331583 (1967-07-01), Baker
patent: 3499456 (1970-03-01), Rerecich et al.
patent: 3978884 (1976-09-01), Sundstrom
patent: 4054156 (1977-10-01), Benson

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