Patent ID: 8011702

Claim:
An outer operational device for a panic exit door lock, comprising, in combination: a cover adapted to be mounted to a side of a door, with the cover defining a space, with the cover including a sidewall extending in a vertical direction and an annular wall extending perpendicularly along a periphery of sidewall, with the space defined between the annular wall and the sidewall; a handle including a shank having an engaging portion with non-circular cross sections, with the shank rotatably received in the cover; an actuating member mounted in the space and including an end and a non-circular connecting hole engaged with the engaging portion to rotate therewith; a sliding member slideably received in the space, with the sliding member including a pressing face abutting against the end of the actuating member, so that the sliding member slides when the actuating member rotates; a limiting member pivotably received in the space, with the limiting member including a pivotal portion and a stop, with the stop including a follower portion, with the limiting member being pivotable between a blocking position not allowing movement of the sliding member and a release position allowing movement of the sliding member, with the handle being rotatable when the limiting member is in the release position, with the handle being not rotatable when the limiting member is in the blocking position; a driving member fixed to the sliding member to move therewith, with the driving member including a rod adapted to couple with a panic exit door lock mounted to another side of the door, with the rod being movable to control locking or unlocking of the panic exit door lock; a cylinder mounted to the cover and including a lock core rotatably mounted therein, with an actuator being mounted outside of the cylinder and fixed to the lock core to rotate therewith; a mover rotatably mounted around the cylinder and including a tab and an actuating bar, with the tab being located in a path of rotational movement of the actuator and, thus, operably connected to the actuator, with the actuating bar being operably connected to follower portion, such that the mover is rotated to move the limiting member between the blocking position and the release position when the actuator is rotated; and a returning device mounted in the space and including: a body including a compartment; a housing mounted around the body; a rotatable member rotatably mounted in the compartment, with the rotatable member including a non-circular hole engaged with the engaging portion to allow joint rotation of the rotatable member and the handle; and an elastic element mounted between the body and the rotatable member for returning the rotatable member and the handle.