Patent ID: 6953210
Filing Date: 2005-10-11
Classification: E05B,Y10T

Abstract:
1. A door lock comprising: a lock case, a bolt, a follower acting on the bolt, a coupling member selectively movable relative to the follower between a coupling position in which the coupling member coupled an operating shaft of the lock to the follower for force transmission from the operating shaft to the follower, and a decoupling position in which the operating shaft is not coupled to the follower, a lever member that includes a first support element and a second support element at different respective distances from the coupling member, a pivot member for engaging selectively either said first support element or said second support element and supporting the lever member for turning movement relative to the lock case about a central axis of the pivot member in a first rotational direction for moving the coupling member to the coupling position and in a second rotational direction, opposite the first rotational direction, for permitting the coupling member to move to the decoupling position, and an actuator including an engagement element that engages the lever member at a location between the first and second support elements and a force mechanism for urging the engagement element in a first direction for turning the lever member in one of said first and second rotational directions about the central axis of the pivot member or in a second direction, opposite the first direction, for turning the lever member in the other of said first and second rotational directions about the central axis of the pivot member, whereby in the event that the pivot member engages the first support element, urging of the engagement element in the first direction causes the lever member to turn in the first rotational direction whereas in the event that the pivot member engages the second support element, urging of the engagement element in the first direction causes the lever member to turn in the second rotational direction.