Closure lock

Details Closure lock Closure lock

1993-12-14

1994-12-06

Cuomo, Peter M.

Movable or removable closures

With operator for movably mounted closure

Operator drives closure along guide

318760, E05F 1100

Patent

active

053699130

ABSTRACT:
A closure lock which utilizes the operating motor for moving of the closure as the locking mechanism. A shorting circuit is applied across the motor when the closure is in an at-rest position. Any attempt at manually moving of the closure between the closed position of the closure and the open position of the closure will require the rotor of the motor to be rotated relative to the stator of the motor. This requires a significant amount of motor drag to be overcome which is difficult and thereby functions as a locking mechanism preventing operating of the closure. This closure lock can be bypassed by an authorized person by the opening of a manually operated switch which will permit the closure to be easily moved between its open and closed position.

REFERENCES:
patent: 4313281 (1982-02-01), Richmond
patent: 4812728 (1989-03-01), Yang
patent: 4945677 (1990-08-01), Kramer
patent: 4954759 (1990-09-01), Fey
patent: 5076012 (1991-12-01), Richmond et al.

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