Valves and valve actuation – Fluid actuated or retarded – With mechanical movement between actuator and valve
Patent
1973-12-28
1976-11-02
Schwadron, Martin P.
Valves and valve actuation
Fluid actuated or retarded
With mechanical movement between actuator and valve
74 8915, 744248VA, 92 2, 92 33, 92113, 92116, F16K 3112
Patent
active
039892239
ABSTRACT:
An hydraulically operated failsafe valve actuator for use on non-rising valve stems, particularly in a subsea environment. A rotatable shaft is connected to the non-rising valve stem. In one embodiment the valve is actuated to open by a fluid pressure operated motor acting against the bias of a spring. Means connects means linearly movable along the shaft and converts the linear movement of the linear movable means to rotary movement of the shaft. Spring means moves the linearly movable means in one direction to cause the shaft to rotate in one direction. Fluid pressure means, including a fluid pressure operated motor, rotates the shaft in an opposite direction to cause the linearly movable means to move in an opposite direction along the shaft. In another embodiment the valve is actuated to open by a fluid pressure operated piston acting against the bias of the spring. The piston is mounted on the rotatable shaft and moves linearly along the shaft to cause the shaft to rotate. Spring means moves the piston in one linear direction to rotate the shaft in one direction. Fluid pressure moves the piston in an opposite direction to rotate the shaft in an opposite direction.
REFERENCES:
patent: 2709062 (1955-05-01), Lamb
patent: 2883144 (1959-04-01), Kendig
patent: 3450382 (1969-06-01), Calim
patent: 3512421 (1970-05-01), Anderson
patent: 3628397 (1971-12-01), Sheesley
patent: 3640140 (1972-02-01), Gulick
Burkhardt Joseph A.
Childers Thomas W.
Koerner Roger J.
Exxon Production Research Company
Schneider John S.
Schwadron Martin P.
Walton George L.
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