Diaphragm latch mechanism

Details Diaphragm latch mechanism Diaphragm latch mechanism

1989-12-11

1990-10-23

Nicholson, Eric K.

Closure fasteners

Bolts

Multiple

29225665, 292260, 70168, 220235, 220323, E05C 900

Patent

active

049646591

ABSTRACT:
A latching mechanism is provided for enabling perimeter locking for doors and the like. A diaphragm is provided which engages a surrounding frame along the perimeter of the diaphragm. Slots in the diaphragm enable a reduction of the diaphragm perimeter by movement of a central portion of the diaphragm in a direction perpendicular to the original plane of the diaphragm. When the diaphragm perimeter is reduced, simultaneous disengagement between the perimeter and the surrounding frame occurs.

REFERENCES:
patent: 609569 (1898-08-01), Berchtold
patent: 1015907 (1912-01-01), Ryder
patent: 1308794 (1919-07-01), Lynch et al.
patent: 1973924 (1934-09-01), Kloeb
patent: 2283371 (1942-05-01), Johnson
patent: 2488796 (1949-11-01), Baier
patent: 2735571 (1956-02-01), Lockwood
patent: 3606070 (1971-09-01), Shepherd
patent: 3791045 (1974-02-01), Landis et al.
patent: 3893584 (1975-07-01), Ledford
patent: 4534488 (1985-08-01), Boggs et al.

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