Multiple lock assembly

Details Multiple lock assembly Multiple lock assembly

1994-05-13

1997-02-18

Dino, Suzanne L.

Locks

Special application

For closures

70120, 292 36, E05B 6314

Patent

active

056032340

ABSTRACT:
A lock assembly for locking and unlocking a door comprising a lock bar moveable between a locked and unlocked position, three locks, each of which have lock arms moveable between a locked and an unlocked position, and a linkage connecting the lock arms to the lock bar. The linkage has a first operating configuration whereby the lock bar moves from its locked to its unlocked position in response to the movement of any pair of lock arms from their locked to their unlocked position. The linkage also has a second operating configuration whereby the lock bar moves from its locked to its unlocked position in response to either movement by a predetermined pair of lock arms from their locked to unlocked position or the movement of the third lock arm from its locked to unlocked position.

REFERENCES:
patent: 2094369 (1937-09-01), Millice
patent: 2375196 (1945-05-01), Cederwall
patent: 2445511 (1948-07-01), Bretos y Claveria
patent: 2494575 (1950-01-01), O'Brien
patent: 2729089 (1956-01-01), Pelcin
patent: 4147044 (1979-04-01), Bernath
patent: 4362034 (1982-12-01), Amgar
patent: 4470277 (1984-09-01), Uyeda
patent: 4679415 (1987-07-01), Spratt
patent: 5067755 (1991-11-01), James
patent: 5341752 (1994-08-01), Hambleton

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