Locks – Operating mechanism – Using a powered device
Patent
1991-07-31
1993-01-12
Luebke, Renee S.
Locks
Operating mechanism
Using a powered device
70175, 292144, 292252, E05B 4700
Patent
active
051779889
ABSTRACT:
A locking system for a dead bolt and slam bolt locking of a movable door to a stationary keeper comprises a lock housing defining a cylinder chamber having an opening alignable with a keeper recess in the closed position of the door. A spherical locking bolt is mounted on a piston which is slidably and sealably movable in the cylinder chamber between an inner non-locking position and an outer locking position. The interior of the cylinder chamber is filled with a non-compressible fluid by outward movement of the piston and a normally closed check valve prevents exhaust of such fluid to produce a dead lock conditon. The check valve is alternatively opened by a manual key or by remotely controlled energization of a solenoid.
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Dino Suzanne L.
Luebke Renee S.
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