Patent ID: 7452012

Claim:
A multi-functional mortise lock comprising: a casing having a front plate for confronting a door frame, a first sidewall and an opposed second sidewall, at least one of the sidewalls having a lock cylinder opening for receiving a lock cylinder; a latch bolt movable with respect to the casing between an extended position and a retracted position; at least one spindle hub adapted for connection to a spindle projecting from a handle, the at least one spindle hub acting to move the latch bolt to the retracted position when rotated; an interfering member movable between a locked position in which the interfering member interferingly engages the at least one spindle hub to prevent rotation thereof and an unlocked position in which the interfering member is disengaged from the at least one spindle hub; a lock/unlock lever for moving the interfering member between the locked and unlocked positions, a latch retract lever for moving the latch bolt between the extended and retracted positions; a control hub operable by the lock cylinder, the control hub being operably connected to the lock/unlock lever to move the interfering member between the locked and unlocked positions; the latch retract lever being operable by the lock cylinder to move the latch bolt between the extended and retracted positions; at least one blocking element positionable through at least one blocking opening in the first sidewall to prevent the lock cylinder from operating the lock/unlock lever to move the interfering member between the locked and unlocked positions, the at least one blocking element being positionable through the at least one blocking opening without removing the first or second sidewall from the mortise lock.