Key-in-lever type door lock used for handicapped people

Details Key-in-lever type door lock used for handicapped people Key-in-lever type door lock used for handicapped people

1991-07-12

1993-01-12

Luebke, Renee S.

Locks

Special application

For control and machine elements

70479, 2923363, 2923365, E05B 1310

Patent

active

051779870

ABSTRACT:
A key-in-lever type door lock which can be installed on either a left hand or right hand door by a left-right reverse operation of a reverse plate. The lock comprises a lock assembly which regulates a uni-directional, 45-degree rotation of a handle thereof and a latch assembly which converts the 45-degree rotational movement to a retraction of a latch bolt. The lock is jimmy-proof, i.e., secure against improper manipulation, by the provision of a latch stop pivoted to the latch bolt and being movable together therewith. The latch stop, which has a catch end normally blocked by a retaining plate, is operationally pivotable about the latch bolt to release the blockage, thereby permitting a relative sliding movement between the latch stop and the retaining plate.

REFERENCES:
patent: 1876576 (1932-09-01), Arste
patent: 2726891 (1955-12-01), Gresham et al.
patent: 3354676 (1967-11-01), Wilson
patent: 4031725 (1977-06-01), Reid
patent: 4594864 (1986-06-01), Hart
patent: 4604879 (1986-08-01), Neary et al.
patent: 4838053 (1989-06-01), Shen
patent: 4945737 (1990-08-01), Hart

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