Anti-pick cylinder lock

Details Anti-pick cylinder lock Anti-pick cylinder lock

1989-01-19

1990-11-27

Gall, Lloyd A.

Locks

Operating mechanism

Key

70377, E05B 2904

Patent

active

049726951

ABSTRACT:
Disclosed herein is a cylinder lock which is proof against lock pickers. The cylinder lock comprises a case having a cylindrical bore formed therein and an axially extending lock groove exposed to the cylindrical bore; a rotor rotatably disposed in the cylindrical bore; a plurality of tumblers slidably received in slits formed in the rotor, each tumbler having a head which is projectable into the lock groove when the rotor assumes a given angular position relative to the case; springs for biasing the tumblers radially outward from the slits of the rotor; and a structure for making the distances by which the heads of the tumblers are projected into the lock groove of the case different from one another.

REFERENCES:
patent: 450341 (1891-04-01), Russell, Jr.
patent: 466918 (1892-01-01), Forster et al.
patent: 1556606 (1925-10-01), Jacobi et al.
patent: 1860708 (1932-05-01), Falk
patent: 2023207 (1935-12-01), Olson
patent: 2079628 (1937-05-01), Olson
patent: 2330929 (1943-10-01), Shinn
patent: 3705507 (1972-12-01), Sanders et al.
patent: 4292823 (1981-10-01), Reinhard et al.

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