Lock cylinder with a body having integral spring retainer

Details Lock cylinder with a body having integral spring retainer Lock cylinder with a body having integral spring retainer

1995-02-16

1996-07-30

Gall, Lloyd A.

Locks

Operating mechanism

Key

70492, E05B 2904

Patent

active

055400710

ABSTRACT:
A lock cylinder includes a cylindrical body with first and second ends and a curved surface between those ends. A keyway extends from the first end into the cylindrical body for receiving a key that operates the lock. A slot extends from the curved surface to the keyway and has a separate pair of spaced apart lips spaced from opposite ends of the slot. A locking bar is within the slot and has a recess spaced from each end within which a pair of lips are received. Separate springs in each recess act against the pairs of lips to bias the locking bar into the cylindrical body. A plurality of tumblers are slideably located within the cylindrical body at a junction between the keyway and the slot. When the key is removed from the keyway, the tumblers push the locking bar to project from the curved surface of the cylindrical body. When the key is inserted fully into the keyway, the tumblers assume positions at which the locking bar is able to retract into the cylindrical body due to force exerted by the pair of springs against the lips.

REFERENCES:
patent: 2003086 (1935-05-01), Liss
patent: 2021185 (1935-11-01), Hurd
patent: 2405911 (1946-08-01), Swanson
patent: 2879658 (1959-03-01), Johnstone
patent: 2949762 (1960-08-01), Johnstone
patent: 3002268 (1961-10-01), Spain
patent: 3709006 (1973-01-01), Seidewand
patent: 3877267 (1975-04-01), Harris, Jr.
patent: 4446709 (1984-05-01), Steinbach
patent: 4561270 (1985-12-01), Spreng
patent: 4750342 (1988-06-01), Nakai

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