Bi-directional clutch type chain pulling device for rolling door

Details Bi-directional clutch type chain pulling device for rolling door Bi-directional clutch type chain pulling device for rolling door

1994-11-14

1996-12-03

Marmor, Charles A.

192 clutches and power-stop control

Vortex-flow drive and clutch

With brake

192144, F16D 6700, E05F 1500

Patent

active

055798780

ABSTRACT:
A bi-directional clutch type chain pulling device for rolling doors for releasing the brake and rolling the door up by pulling the chain at an arbitrary direction has a chain sprocket which can be pulled by external force and which is pivoted thereon with a spring acted triggering plate, the sides of which are formed with a pair of branch legs and a projected actuating pin which is secured at an intermediate portion. A linkage pin is inserted into the rotating shaft and projects out. An intermediate disk has radially an elongate slide groove and has in the intermediate portion a cylinder having an inner hole, on the inner surface of the hole being provided with a friction ring which can be actuated via the actuating pin. A release lever mechanism including a brake release lever is provided having a pin secured to one end for insertion into the elongate slide groove, the other end being pivoted and having a pair of upwardly inclined wing plates secured to it for acting on an actuating lever fixed integrally with the cam pin of a drum brake assembly via an intermediate lever pivoted at one end.

REFERENCES:
patent: 2670065 (1954-02-01), Stevens
patent: 4059779 (1977-11-01), Wistinghausen
patent: 4348011 (1982-09-01), Honda

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