Pin tumblers and corresponding keys for cylinder locks

Details Pin tumblers and corresponding keys for cylinder locks Pin tumblers and corresponding keys for cylinder locks

1991-10-24

1994-03-01

Gall, Lloyd A.

Locks

Operating mechanism

Key

70378, 70403, 70409, E05B 2704

Patent

active

052897095

ABSTRACT:
A tumbler pin tip and key surface are configured so that when engaged, the tumbler pin tip fully and precisely seats in the key bitting, and thus is rotationally positioned at a predetermined location. The contacting surfaces are generally sloped from one edge of the tumbler (and key surface) to the other in tapered form and the sloping surface may be flat, concave, convex or a combination as disclosed.

REFERENCES:
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patent: 4325241 (1982-04-01), Keller
patent: 4424692 (1984-01-01), Rousseau
patent: 4635455 (1987-01-01), Oliver
patent: 4756177 (1988-07-01), Widen
patent: 4760722 (1988-08-01), Fann et al.

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