E - Fixed Constructions – 05 – B
Patent
E - Fixed Constructions
05
B
292/2
E05B 65/10 (2006.01)
Patent
CA 1254921
CRASH BAR DOOR LOCKING DEVICE Abstract A crash bar door locking device is provided, suited for mounting on the inside of a swinging door. The crash bar is mounted horizontally across the door providing ready access by movement in the outside direction. The crash bar activates a pivotal lever which causes a latch bolt to rotate inwardly and dis- engage from a door strike. The pivotal lever provides a deadbolt feature by preventing the rotation of the latch bolt. A release is incorporated in the latch bolt and allows the latch bolt to rotate when the re- lease engages the door strike as the door closes. An additional unlocking mechanism may be provided for re- tracting the latch bolt from the outside of the door independently of the crossbar. A firelocking mechan- ism may be incorporated in the latch bolt to secure the latch bolt when a fire occurs. Two pins with a spring between them are retained by fusible plugs at either end of a bore in the latch bolt, so that the latch bolt operates as normal lock on the door. When a fire occurs, the fusible plugs will melt and the pins will go to an extended position in which they in- teract with a bracket mounted on the door and prevent the latch bolt from disengaging the door strike so that the door will remain closed.
479940
Dorma Properties Inc.
Osler Hoskin & Harcourt Llp
LandOfFree
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