Force immune door latch

Details Force immune door latch Force immune door latch

1985-01-02

1987-07-14

Holko, Thomas J.

Locks

Operating mechanism

Key

70222, 292348, 292353, E05B 1310

Patent

active

046794204

ABSTRACT:
An improved force immune door knob/latch is provided which, by use of resiliently-biased ratcheting means, is rendered immune to force resulting from the application of excess torque to the door knob. These resiliently-biased ratcheting means are such that their biasing force is oriented in a direction perpendicular to the longitudinal axis of the door latch shaft.

REFERENCES:
patent: 191363 (1877-05-01), Naylor
patent: 485899 (1892-11-01), Tannenberg
patent: 843052 (1907-02-01), Weber
patent: 1013878 (1912-01-01), Hilton
patent: 1516152 (1924-11-01), Dumont
patent: 1611940 (1926-12-01), Ohmer
patent: 1668403 (1928-05-01), Haven
patent: 2017530 (1935-10-01), De Orlow
patent: 2511522 (1950-06-01), Williams
patent: 2676050 (1954-04-01), Nichols
patent: 2701735 (1955-02-01), Segal
patent: 2707649 (1955-05-01), Young
patent: 3621685 (1971-11-01), Sargent
patent: 4195502 (1980-04-01), Best et al.
patent: 4312201 (1982-01-01), Roos
patent: 4370875 (1983-02-01), Piiroinen

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