Drive mechanisms, more particularly for valve actuators

Details Drive mechanisms, more particularly for valve actuators Drive mechanisms, more particularly for valve actuators

F - Mech Eng,Light,Heat,Weapons

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F16H 57/00 (2006.01) F16K 31/05 (2006.01) G05G 11/00 (2006.01)

Patent

CA 1147982

ABSTRACT This invention relates to a motorised actuator in which the motor shaft is drivably connected with the output shaft through an intermediate shaft assembly. The motor shaft assembly includes a worm and wormwheel which is formed with cut- outs each drivable receiving the extended ends of some of the teeth of a pinion which forms part of the intermediate shaft assembly. The pinion is at all times in driving engagement with a gear on the output shaft and is axially movable by a lever to disengage the motor drive so as to allow independent manual operation of the pinion and thereby the output shaft by a handwheel mounted on a shaft. The shaft is drivably coupled with a wormwheel which is in driving engagement with the pinion by means of the driving lugs.

360904

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