Self-locking garage door operator

Details Self-locking garage door operator Self-locking garage door operator

1987-12-04

1989-05-09

Kannan, Philip C.

Movable or removable closures

Operator interrelated with closure latch release

Motor driven

49200, 160189, E05F 1500

Patent

active

048276677

ABSTRACT:
The invention relates generally to motorized garage door operating apparatus and, more specifically, to such apparatus including mechanical locking means which automatically disengages at the onset of energization of the motorized opening/closing apparatus from the closed door condition before any opening motion of the door begins. The apparatus also operates to activate the locking means after the door is advanced to its fully closed position.

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patent: 4442631 (1984-04-01), Weber
patent: 4597224 (1986-07-01), Tucker
patent: 4618174 (1986-10-01), Duke
patent: 4739584 (1988-04-01), Zellman

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