Patent ID: 8485569

Claim:
A lock assembly comprising a) a rotary latch member rotatable between a first, locking, position and a second, released, position; b) an actuator for effecting rotation of the rotary latch member; c) a deadlocking member movable between a first, deadlocking, position and a second, released, position for deadlocking the rotary latch member, wherein the actuator directly engages the deadlocking member; and d) a rotary drive mechanism between the actuator and the rotary latch member for transmitting a rotary drive to the rotary latch member, the rotary drive mechanism including first and second members, said first member mounted for rotation about a first axis, and said second member mounted for rotation about a second, axis, substantially parallel to the first axis, and having overlapping peripheral portions with at least two sets of interengaging formations, each set of interengaging formations comprising: i) a recess extending radially outwardly from a peripheral portion of one of the first and second members, and ii) a post projecting in the direction generally parallel to the axes of rotation of the members and engagable in said recess, a first set of interengaging formations being arranged to interengage over a first part of the movement of the rotary latch member from the first, locking, position to the second, released, position and a second set of interengaging formations being arranged to interengage over a second part of the movement of the rotary latch member from the first, locking, position to the second, released, position, the first and second parts of the movement of the rotary latch member being different from one another and continuous or overlapping, and wherein said deadlocking member is mounted for rotation about a third axis and is distinct from the rotary drive mechanism.