Electrically-operated roller door operating mechanism

Details Electrically-operated roller door operating mechanism Electrically-operated roller door operating mechanism

E - Fixed Constructions

06

B

160/9

E06B 9/74 (2006.01)

Patent

CA 1166562

ABSTRACT OF THE INVENTION An electrically operated roller door driving mechanism for operating a roller door comprising a reversible electrical motor fixedly mounted to one of the roller door supporting drum wheels and housed within the core of the roller door curtain, the motor and drum wheel being arranged to rotate simultaneously, and a ring gear operatively associated with said motor via a reduction gear mechanism, the ring gear being capable of being held stationary with respect to the rotating drum wheel but also being capable of rotating in unison with the drum wheel to thereby enable the roller door to be manually opened and closed in the event of a motor malfunction or power failure.

363827

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