Patent ID: 6189351
Filing Date: 2001-02-20
Classification: E05B,Y10S,Y10T

Abstract:
A door lock having an inner handle (14); an outer handle (12); a key cylinder (28) positioned within the outer handle; a chassis (20) containing a latch retractor; an inner spindle (52) having latch scoops (45) thereon, the inner spindle latch scoops being operably connected to the latch retractor, the inner spindle being operably connected to the inner handle; an outer spindle (42) keyed to the outer handle; and a tubular key spindle (44) positioned within the outer spindle, the key spindle having two latch scoops (45) thereon, the key spindle latch scoops being operably connected to the latch retractor, characterized in that:a lost motion means for operatively connecting the key cylinder to the key spindle and for permitting the key cylinder to freely rotate a predetermined degree of rotation relative to the key spindle, the lost motion means comprising the key spindle having an aperture (62) therein and a rotatable plug bushing (67) therein, a cam pin (60) extending radially from the plug bushing into the key spindle aperture, a spring which is free of contact with said plug bushing biasing said plug bushing toward said latch retractor, ends of said cam pin engaging the plug bushing and the key spindle the key cylinder operably engaging the plug bushing whereby, when the key cylinder is rotated, the plug bushing and cam pin rotate, the cam pin contacting an edge of the aperture thereby transmitting the rotary motion of the key cylinder to the key spindle.