Patent ID: 8146392

Claim:
A latch for a door or window, the latch comprising: a housing adapted to be mounted on the door or window; a spring bolt shiftable on the housing between an extended position and a retracted position; a dead bolt shiftable on the housing between an extended position and a retracted position; a latch nut rotatable on the housing and connectable to inside and outside door handles; an actuating lever on and shiftable by the nut; an actuating element connected between the dead bolt and the actuating lever such that the dead bolt is moved into the respective retracted position on shifting of the actuating lever by the nut; a panic lever on and shiftable by the nut; a panic element connected to the panic lever and movable between an actuated position and an unactuated position; a key cylinder on the housing having an actuating lug movable between a locking end position and a freeing end position; a pivotal locking pawl shiftable by the actuating lug of the key cylinder into a locked position blocking movement of the actuating element and holding the dead bolt in the extended position and by movement of the lug into the freeing position into an unlocked position freeing the bolt and actuating element, the pawl being connected to the panic element and shiftable on movement of the panic element between the unactuated position and the actuated position, the locking pawl being coupled in the locked position to the lug such that, for a panic opening of the door, movement of the panic element into the actuated position shifts the lug into the freeing position and allows the pawl to move into the unlocked position and the dead bolt to move into the retracted position; a transmission ring rotatable on the key cylinder and coupled between the actuating lug and the locking pawl; and respective arrays of interengageable teeth on the ring and pawl.