Trolley member of garage door opener system

Details Trolley member of garage door opener system Trolley member of garage door opener system

2005-01-11

2005-01-11

Redman, Jerry (Department: 3634)

Movable or removable closures

Optionally moved, manually, or by motor

C192S08200T

Reexamination Certificate

active

06840010

ABSTRACT:
A trolley member for a garage door opener, comprises a trolley body (2), a connecting rod (7), a gear shaft (3) disposed on the trolley body (2), a rack (5) disposed on the trolley body (2), a gear (9) disposed on the gear shaft (3). The teeth of the gear (9) is engaged with the teeth of the rack (5). The rack (5) is connected to a spring device. The rack (5) has two working status. A first working status is that the rack (5) is inserted into a slot (10) of a chain link (8) and the spring member urges the rack (5) to the first working status, and a second working status is that the rack (5) is detached from the slot (10). The rack (5) is always urged to the first working status by the spring device, thereby the motor can reliably drive the chain and then the trolley member moving, and the chain can not be idling.

REFERENCES:
patent: 4628636 (1986-12-01), Folger
patent: 5253451 (1993-10-01), Hormann

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