Valves and valve actuation – Fluid actuated or retarded – With mechanical movement between actuator and valve
Patent
1997-04-25
1999-11-02
Walton, George L.
Valves and valve actuation
Fluid actuated or retarded
With mechanical movement between actuator and valve
74 25, 74469, 7447901, 251229, 251279, F16K 31145
Patent
active
059754877
ABSTRACT:
A rotary valve actuator for fluid control valves having improved actuator linkage matching the torque requirements of most rotary shaft valves. A link member is pivotally interconnected to a linear movable actuating member and to a rotatable lever. The link member enables a high actuator torque to be developed and provided during the times when the valve requires a high torque, and a low actuator torque during other times when the valve only requires a lower torque. A high-low-high actuator torque is provided matching the high-low-high torque requirements of most rotary valves.
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Fisher Controls International Inc.
Walton George L.
LandOfFree
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