Patent ID: 7934754

Claim:
A lock assembly for use with a latch movable from an extended position to a retracted position, the lock assembly comprising: an interior assembly including, an interior handle, a push button assembly manually movable from an unlocked position to a locked position, a biasing member that biases the push button assembly toward the unlocked position, a retaining member that engages both the push button assembly and a lock member to retain the push button assembly in the locked position, an exterior assembly including an exterior handle; a driver rotatable from a locked position to an unlocked position such that the exterior handle is manually operable to retract the latch when the driver is in the unlocked position and inoperable to retract the latch when the driver is in the locked position; and a cam member coupled to the driver for rotation with the driver, wherein the push button assembly engages the cam member to rotate the driver toward the locked position when the push button assembly moves from the unlocked position toward the locked position and the push button assembly engages the cam member to rotate the driver toward the unlocked position when the push button assembly moves from the locked position toward the unlocked position, wherein the push button assembly includes a cam surface, wherein the cam member includes a cam surface, and wherein the cam surface of the push button assembly contacts the cam surface of the cam member to rotate the driver toward the locked position.