Thumb actuated latch retracting mechanism for grip handle locks

Details Thumb actuated latch retracting mechanism for grip handle locks Thumb actuated latch retracting mechanism for grip handle locks

1996-05-15

1997-01-14

Lindsey, Rodney M.

Closure fasteners

Operators with knobs or handles

292165, 292357, 292DIG53, E05B 300

Patent

active

055931936

ABSTRACT:
A thumb actuated latch retracting mechanism, for mounting with a grip handle on a door, includes a thumbpiece, the thumbpiece having a laterally offset cam on a second end thereof; an escutcheon plate having an opening through which the second end of the thumbpiece and the cam protrude into a door preparation cavity; and provision within the cavity for retracting a latchbolt in response to pressing the thumbpiece, the provision including a chassis mounted to the escutcheon and containing further provisions for converting linear motion of the thumbpiece cam to rotary motion of a spindle for retracting the latchbolt. The chassis also has tabs which act as barbs to hold the handle and mechanism against the door when pushed into mounting position and to simplify installation.

REFERENCES:
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patent: 3477754 (1969-11-01), Check
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patent: 4576405 (1986-03-01), Wartian
patent: 4629228 (1986-12-01), Marko et al.
patent: 4632439 (1986-12-01), Miller
patent: 4779909 (1988-10-01), Hennessy
patent: 4982986 (1991-01-01), Gresset, Jr. et al.
patent: 4986583 (1991-01-01), Campbell et al.
patent: 5190327 (1993-03-01), Lin
patent: 5385374 (1995-01-01), Fann et al.

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