Safety device for power operated overhead door

Details Safety device for power operated overhead door Safety device for power operated overhead door

1990-01-16

1990-09-18

Kannan, Philip C.

Movable or removable closures

Safety means responsive to obstruction to closure

Closure drive stopping or reversal

49199, 49322, 160193, E05F 1500

Patent

active

049569384

ABSTRACT:
In conjunction with a conventional power operated overhead door, such as a garage door, which has wire cables attached to the door for assisting in raising (opening) and lowering (closing) the door, a cam plate or dog having a toothed edge can be pivotably moved to instantaneously clamp or bind against the wire cable to stop its downward movement in the event any obstacle, such as a small child, is detected in the path of the door while it is being closed. The cam plate is biased to permit the wire cable to move in a direction to open the door.

REFERENCES:
patent: 1544558 (1925-07-01), Coleman
patent: 1998233 (1935-04-01), Greegor
patent: 4385471 (1983-05-01), Gabry et al.

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