Locks – Special application – For closures
Reexamination Certificate
2005-04-05
2005-04-05
Walsh, John B. (Department: 2151)
Locks
Special application
For closures
C070S465000
Reexamination Certificate
active
06874339
ABSTRACT:
An emergency release for a door lock that is to be mounted to a door includes a lock unit having handles and a lock, one of the handles being associated with the lock and the other not associated therewith, a latch unit having a latching bolt, wherein the lock, when set, prevents retraction of the latching bolt by rotation of the handle associated with the lock, but does not prevent the retraction by rotation of the other handle, a linking unit having latch retraction means and a holding element, and a sensor unit having a sensor door. The sensor door is opened in response to a predetermined pressure change across the door on which the door lock is mounted and is connected to the holding element so that the holding element actuates latch retraction when the sensor door is opened for retracting the bolt independently of the lock unit.
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patent: 5590917 (1997-01-01), Brooks et al.
patent: 11-256896 (1999-09-01), None
Takigen Mfg. Co., Ltd.
Walsh John B.
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