Releasable drive mechanism

Details Releasable drive mechanism Releasable drive mechanism

1994-08-30

1997-03-25

Lorence, Richard M.

Movable or removable closures

Optionally moved, manually, or by motor

192 6961, 192 97, 192995, 192108, E05F 1500, F16D 1104

Patent

active

056133219

ABSTRACT:
A releasable drive mechanism is provided, having a sprocket and gear rotatable about a central axis, the gear being rotatably secured to a shaft extending along the central axis. The sprocket and the gear are each configured to provide a coplanar portion extending parallel with the central axis that interfaces the surface of the other. A clutch engageable with the sprocket and the gear is provided, having projections or keys being positionable between the interfacing surfaces for releasably coupling the sprocket and the gear for joint rotation. A lever is provided for disengaging the clutch and the clutch may be biased to facilitate engagement of the clutch. A clip may also be provided to prevent lateral movement of the sprocket on the shaft when the clutch is disengaged.

REFERENCES:
patent: 4265350 (1981-05-01), Vaughan
patent: 4504094 (1985-03-01), Barrows
patent: 4869354 (1989-09-01), Brazier
patent: 5048653 (1991-09-01), Fellows
patent: 5161630 (1992-11-01), Garin, III et al.
patent: 5263527 (1993-11-01), Marlatt et al.

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