Flush-mounted door latch

Closure fasteners – Bolts – Swinging and camming

Patent

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Details

292DIG31, 292DIG37, 292223, 292216, E05C 314

Patent

active

055709150

ABSTRACT:
A flush-mounted latching device is provided for two-sided operation of a door. A spring-loaded cam engages a corresponding roller bearing mounted adjacent to the door to prevent opening when the latch is in a locked condition. Touch-operated push-buttons provided on either side of the door may be actuated to release the latch and allow the door to spring open. A push-button mounted flush with the interior surface of the door releases the latch immediately upon depression. A push-button mounted substantially flush with the exterior surface of the door releases the latch when depressed and then released. From either side, the door opens in a direction corresponding to the movement of an operator's finger upon actuating the corresponding push-button.

REFERENCES:
patent: 2156874 (1939-05-01), Schonitzer
patent: 2238414 (1941-04-01), Erickson
patent: 2497624 (1950-02-01), Nelson
patent: 2700290 (1955-01-01), Dall
patent: 2863200 (1958-12-01), Miller et al.
patent: 3176487 (1965-04-01), Dauenbaugh
patent: 3384404 (1968-05-01), Slattery
patent: 4003614 (1977-01-01), Geer et al.
patent: 4006951 (1977-02-01), Geer et al.
patent: 4025096 (1977-05-01), Geer
patent: 4056276 (1977-11-01), Jarvis
patent: 4194377 (1980-03-01), Maeda
patent: 4438964 (1984-03-01), Peters
patent: 4487440 (1984-12-01), Beijer
patent: 4510779 (1985-04-01), Ahad
patent: 4635454 (1987-01-01), Brown
patent: 4978153 (1990-12-01), Hirsch et al.

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