High security locks and key

Details High security locks and key High security locks and key

1984-01-16

1984-11-20

Smith, Gary L.

Locks

Operating mechanism

Key

70398, E05B 1912

Patent

active

044831641

ABSTRACT:
A high security lock and a high security key for locking and unlocking said lock. The lock has a resilient O-ring seated in the bore of a hollow plunger and a retainer sleeve fixed in the bore of the hollow plunger and bearing against the rear surface of the O-ring. A center pin with an enlarged forward head extends rearwardly through the bore of the plunger, the O-ring gripping the periphery of the center pin and yieldably resisting center pin reciprocal movement within the plunger bore. The key has elongated outer expanding fingers and an inner coaxially arranged center pin. When the key is fully inserted into the lock and the key handle is operated, the expanding fingers are initially radially expanded to grip the inner surface of the lock plunger bore, and are then longitudinally retracted to draw the plunger rearwardly. Simultaneously, the key center pin is prevented from retracting and holds the lock center pin stationary permitting the lock to unlock.

REFERENCES:
patent: 3478548 (1969-11-01), Finck
patent: 4040279 (1977-08-01), Signorelli et al.
patent: 4155232 (1979-05-01), Haus et al.

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