Drive mechanisms, more particularly for valve actuators
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United States of America Patent
Stats
-
Feb 1, 1983
Grant Date -
N/A
app pub date -
Sep 25, 1980
filing date -
Sep 28, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
This invention relates to a motorized 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 drivably 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.
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