Door unlocking device

Details Door unlocking device Door unlocking device

1985-12-03

1987-07-14

Moore, Richard E.

Closure fasteners

Bolts

Sliding

292254, E05C 106

Patent

active

046798340

ABSTRACT:
A device for unlocking a door locked with a door lock apparatus of a type which is comprised of a latch bolt and a trigger bolt capable of locking the latch bolt and of preventing the latch bolt from being retracted when the door is closed. The unlocking device is mounted on a door frame supporting the door and includes a strike having openings through which the trigger and latch bolts are inserted, and a stopper plate moveable between a service position where it is engaged by the trigger bolt to prevent trigger bolt from protruding from the strike and a non-service position where the trigger bolt is permitted to protrude from the strike so as to release the locking of the latch bolt with the trigger bolt. The stopper plate is moved by a solenoid actuated by remote control. The unlocking device is further provided with a pushing member which moves the latch bolt, which has been released from the trigger bolt, out of the strike, whereby the door may be opened by mere pushing without rotating a door knob.

REFERENCES:
patent: 3917329 (1975-11-01), Fujiki et al.
patent: 4529234 (1985-07-01), Senften

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