Handle assembly for dual-stem door lock

Details Handle assembly for dual-stem door lock Handle assembly for dual-stem door lock

1993-10-06

1996-01-09

Boucher, Darnell M.

Closure fasteners

Knob rose plates

292DIG53, 292DIG30, 292348, 292DIG27, 292142, 70107, E05B 1502

Patent

active

054823340

ABSTRACT:
A door lock having upper and lower vertically spaced actuator seats centered on respective vertically spaced upper and lower axes has a handle assembly having inner and outer mounting plates horizontally flanking the door lock. An upper stem fitted in the upper actuator seat and supported on the inner plate can rotate about the upper actuator axis and carries an inner handle. A lower stem fitted in the lower actuator seat and supported on the outer plate can rotate about the lower axis. An outer stem separate from the inner stem and supported on the outer plate can rotate about the upper axis coaxially with the inner stem and carries an outer handle. Gearing interconnects the outer and lower stems for rotation of the lower stem about the lower axis on rotation of the outer stem about the upper axis.

REFERENCES:
patent: 1788287 (1931-01-01), Flagg
patent: 1911648 (1933-05-01), Rightmyer
patent: 1968285 (1934-07-01), Egan
patent: 2854277 (1958-09-01), Erkkila
patent: 3791180 (1974-02-01), Doyle
patent: 3839886 (1974-10-01), Watson
patent: 4058333 (1977-11-01), Roe et al.
patent: 4384465 (1983-05-01), Muus
patent: 4606203 (1986-08-01), Esser
patent: 4809526 (1989-03-01), Shen
patent: 4934800 (1990-06-01), Choi
patent: 5060991 (1991-10-01), Davidian et al.
patent: 5284450 (1994-10-01), Swanberg

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