Valves and valve actuation – Fluid actuated or retarded – With mechanical movement between actuator and valve
Patent
1997-04-25
1999-12-14
Walton, George L.
Valves and valve actuation
Fluid actuated or retarded
With mechanical movement between actuator and valve
92 137, 92 68, 92130C, 92132, 92137, 251 60, 251 61, 251229, 251279, F16K 31126
Patent
active
060006757
ABSTRACT:
A rotary valve actuator with movable actuator linkage maintained in a constant "pull-pull" tension, includes a sliding canister, rotatable lever, and a return spring substantially aligned in-line with each other. The linear motion of the canister in response to an expanding and contracting pressurized bladder is converted through chain linkage into rotary lever motion. The return spring is connected through respective chain linkage to the lever so the pulling tension of the spring/lever linkage rotates the lever and maintains tension on both chain linkages. Adjustable travel stops are provided. In an alternate embodiment the return spring chain linkage is configured at right angles to the linear movement of the canister.
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Fisher Controls International Inc.
Walton George L.
LandOfFree
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