Roller door operating mechanism

Details Roller door operating mechanism Roller door operating mechanism

1979-02-12

1981-03-24

Husar, C. J.

Machine element or mechanism

Gearing

Disconnecting means

74577R, 248652, 248666, G05G 508

Patent

active

042572851

ABSTRACT:
A roller shutter or door drum driving mechanism of the kind comprising a pivotally mounted electric motor, a gear train fixedly associated with said motor terminating in a pinion, a ring gear on the drum and manually operable, is furnished with releasable latch means which secure said motor and train in an operative position wherein the pinion meshes with the ring gear but, when released, permit the motor to move to an in-operative position wherein the pinion is clear of the ring gear.

REFERENCES:
patent: 1616027 (1927-02-01), Cheshire
patent: 2598880 (1952-06-01), Beldin

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