Cylinder lock

Details Cylinder lock Cylinder lock

1989-06-12

1990-06-19

Wolfe, Robert L.

Locks

Operating mechanism

Key

70409, E05B 2900

Patent

active

049341642

ABSTRACT:
A cylinder lock includes a cylindrical shell housing a core assembly which is locked against rotation relative to the shell by means of axial locking pieces and radial tumbler pins. The locking pieces move to their unlocking positions when the outer peripheral grooves thereof are aligned circumferentially with the outer peripheral grooves of the core assembly. The inner distal end of the locking pieces does not extend into an axial central bore of the core assembly, thereby minimizing the risk of the lock being picked by an intruder.

REFERENCES:
patent: 955267 (1910-05-01), Hill
patent: 1494765 (1924-05-01), Barrett
patent: 1804955 (1931-05-01), Schlumpf
patent: 2391834 (1945-12-01), Johnstone
patent: 2431894 (1947-12-01), Spain
patent: 3524335 (1970-08-01), George
patent: 4622834 (1986-11-01), Hughes
patent: 4794772 (1989-01-01), Falk et al.
patent: 4838051 (1989-06-01), Yang
patent: 7720838 (1929-07-01), Iznaga

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