Patent ID: 6967562
Filing Date: 2005-11-22
Classification: E05B,G07C,Y10T

Abstract:
1. A retrofit assembly for a cylindrical door lock of the type having an opening spindle for controlling a latch bolt of the door lock and having a latching spindle coaxial with the opening spindle which controls a lock mechanism of the door lock when rotated relative to the opening spindle, the retrofit assembly comprising: an electronically controllable actuating member couplable to the latching spindle and adapted to be positioned on the cylindrical door lock such that the opening spindle is engageable with an inner door knob of the cylindrical door lock; wherein the actuating member rotates the latching spindle relative to the opening spindle when an appropriate electronic signal is received by the actuating member, the rotation causing the lock mechanism to go into an unlocked or a locked state, wherein the actuating member includes a stator which is coupled to the opening spindle and which is rotatable relative to the latching spindle, the actuating member further includes a rotor which is coupled to the latching spindle and which is rotatable relative to the opening spindle, wherein when the rotor rotates relative to the stator, the latching spindle rotates relative to the opening spindle.