Closure fasteners – Operators with knobs or handles
Patent
1993-12-27
1996-11-05
Meyers, Steven N.
Closure fasteners
Operators with knobs or handles
292DIG27, 70422, B21D 4310
Patent
active
055709168
ABSTRACT:
A door lever assembly for disengaging an unlocked latch of a lockable door latch assembly includes a lever handle rotatably connected to a trim housing supporting a stop plate. A cam is operably connected to the lever handle and positioned to rotate in response to rotation of the lever handle, converting its rotational movement to linear movement of a movable slider positioned adjacent to the cam. A lift arm is operably connected to vertical rods of the door latch assembly and an over-ride spring is connected between the slider and the lift arm. The over-ride spring transmits motion of the slider to the lift arm to lift the lift arm and the connected vertical rods when the door latch assembly is in an unlocked position. The over-ride spring compresses in response to slider movement when the blocking slide is positioned to block movement of the lift arm when the door latch assembly is in its locked position, preventing damage to components of the door lever assembly. In an unlocked position, a pivot rotates to control contact between the slider and the stop plate.
REFERENCES:
patent: 2961866 (1960-11-01), North
patent: 3545799 (1970-12-01), Gertsfeld
patent: 3881331 (1975-05-01), Tranberg
patent: 3999411 (1976-12-01), Kambic
patent: 4321812 (1982-03-01), Pelcin
patent: 4520736 (1985-06-01), Crosby
patent: 4649725 (1987-03-01), Yamashita
patent: 4754715 (1988-07-01), Squires
patent: 5149152 (1992-09-01), Lanius
patent: 5290077 (1994-03-01), Fleming
Estremsky Gary
Meyers Steven N.
Palermo Robert F.
Richardson A. James
Von Duprin, Inc.
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