Power opener with manual override

Details Power opener with manual override Power opener with manual override

1978-03-03

1979-02-06

Wyche, Benjamin W.

Machine element or mechanism

Alternate manual or power operators

192 67P, 192 95, F16H 3300

Patent

active

041377966

ABSTRACT:
A mechanism which normally is driven by a motor, but which can be safely manually driven by a hand crank or the like in case of a power shortage or other emergency. The mechanism has a power-driven drive gear and a driven assembly which preferably includes a gear-like member, such as a worm, and a crank-receiving member, such as an internally splined hub. A disconnecting assembly which is responsive to engagement of the hand crank in the crank-receiving member is provided to disconnect the driven assembly from the power-driven drive gear.

REFERENCES:
patent: 2674452 (1954-04-01), Hummert
patent: 2718395 (1955-09-01), Ehrlich
patent: 2772578 (1956-12-01), Kling
patent: 3452479 (1969-01-01), Bentlel

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