Patent ID: 8177268

Claim:
A lock for a lever handle mounted on a door, the lock comprising a blocker-support base adapted to mount on a door in a fixed position to surround a lever handle coupled to the door and the blocker-support base is formed to include an anchor receiver, a lever-handle rotation blocker mounted on the blocker-support base to rotate about a rotation axis between a door-locking position wherein the lever-handle rotation blocker is adapted to block rotation about the rotation axis of a lever handle carried on a door to keep the door in mating contact with a door frame and a door-unlocking position wherein the lever-handle rotation blocker is adapted to allow rotation about the rotation axis of a lever handle carried on a door to allow the door to move out of mating contact with a door frame, and a blocker-movement controller including a rotation lock including an anchor and an anchor return configured to apply a biasing force to the anchor, the anchor being coupled to the lever-handle rotation blocker and configured to move from a lever-rotation blocking position wherein the anchor is arranged to extend into the anchor receiver formed in the blocker-support base toward a lever-rotation unblocking position wherein the anchor is positioned to lie outside the anchor receiver, and actuator means for moving the anchor against the biasing force to cause the anchor to move out of the anchor receiver to free the lever-handle rotation blocker to rotate about the rotation axis in response to rotation of the lever handle about the rotation axis from the door-locking position toward the door-unlocking position.