Patent ID: 8141400

Claim:
A lockset for use with a door comprising: an electronic keypad positioned on a keypad housing and adapted to control a clutch sub-assembly; said electronic keypad including a housing adapted to be positioned on an exterior side of said door and over a single, standard 2 and ⅛ inch door preparation bore; an exterior latch actuating mechanism positioned in said keypad housing and having a first axis of rotation; an interior latch actuating mechanism adapted to be positioned on an interior side of said door and adjacent said bore; said clutch sub-assembly adapted for operating through said bore, adapted for coupling said exterior latch actuating mechanism to said interior latch actuating mechanism when said clutch sub-assembly is engaged and adapted for uncoupling said exterior latch actuating mechanism from said interior latch actuating mechanism when said clutch sub-assembly is disengaged; said clutch sub-assembly comprising: an exterior side mechanism, an interior side mechanism and a clutch axle engagable with said exterior side mechanism and engagable with said interior side mechanism; said exterior side mechanism comprising; a motor having an axle, a worm gear positioned at a first end of said axle, and said axle extending along a first axis and rotatable about said first axis; a spring actuator having a first, anchor end, a second, clutch engaging end and a middle region engaged by said worm gear; and, a clutch actuator engaged by said clutch engaging end of said spring actuator and said clutch actuator adapted to reciprocate; (i) in response to rotation of said worm gear; and, (ii) along a second axis, that is parallel to said first, axis; said clutch axle extending through said door preparation bore along said second axis and engaging with said interior side mechanism upon engagement of said clutch sub-assembly; said interior side mechanism operatively connected to a latch; said latch positioned in said door and adapted to reciprocate through a standard 1-inch or ⅞ door preparation bore in response to rotation of said exterior latch actuating mechanism when said electronic keypad causes said clutch sub-assembly to be engaged.