Lock latch

Details Lock latch Lock latch

1993-06-11

1994-08-30

Lindsey, Rodney M.

Closure fasteners

Bolts

Sliding

292337, E05C 112

Patent

active

053421019

ABSTRACT:
A door latch has an actuating mechanism which retracts the latch tongue by a small amount of rotation of a doorknob. The actuating mechanism includes a wheel rotated by the knob which has a projecting tooth engaging a lever that pulls a plate connected to the latch arm. The lever arm is longer than the tooth.

REFERENCES:
patent: 2533582 (1950-12-01), Hillgren
patent: 2634151 (1953-04-01), Russell et al.
patent: 2759751 (1956-08-01), Kaiser
patent: 2795447 (1957-06-01), Schlage
patent: 3036850 (1962-05-01), Schmid
patent: 4564229 (1986-01-01), Mullich et al.
patent: 4602490 (1986-07-01), Glass et al.
patent: 4711477 (1987-12-01), Fann et al.

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