Clutch for valve actuator

Details Clutch for valve actuator Clutch for valve actuator

F - Mech Eng,Light,Heat,Weapons

16

K

251/14

F16K 31/00 (2006.01) F16D 41/20 (2006.01) F16K 31/04 (2006.01)

Patent

CA 1109850

CLUTCH FOR VALVE ACTUATOR ABSTRACT OF THE DISCLOSURE A valve actuator utilizing a drive motor and a stored energy device to operate valves primarily in safety related applications is disclosed. The actuator operates on signal or loss of power to return a driven valve to a pre- determined position. The actuator in particular utilizes unidirectional coupling between a driven shaft and an output shaft that is coupled to the driven valve. Specifically, the coupling utilizes a coiled spring having a unique diametral relationship with the driven shaft in order to insure reliable actuation and control of shaft wear. A fluid dampened device or dashpot is also utilized to provide controlled operation during the return cycle that is powered by the stored energy device.

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