Cylinder lock and key

Details Cylinder lock and key Cylinder lock and key

1987-05-29

1989-09-26

Smith, Gary L.

Locks

Operating mechanism

Key

70407, 70358, 33540, E05B 1906

Patent

active

048690856

ABSTRACT:
A cylinder lock and key includes one or more lateral ribs extending from a flat key and formed of a shape memory material. Auxiliary lock pins arranged in a cylinder core read the shape of the lateral ribs of the key and enable the lock to be opened only when the memory material of the ribs responds to the application of energy.

REFERENCES:
patent: 2105304 (1938-01-01), Wagner
patent: 2116246 (1938-05-01), MacDonald
patent: 2763027 (1956-09-01), Tampke
patent: 3022408 (1962-02-01), Wagner
patent: 3541818 (1970-11-01), Dana
patent: 3668909 (1972-06-01), Roberts
patent: 4325242 (1982-04-01), Tietz
patent: 4400956 (1983-08-01), Martin
patent: 4433487 (1984-02-01), Roland
patent: 4608842 (1986-09-01), Tietz
patent: 4712398 (1987-12-01), Clarkson et al.
patent: 4726205 (1988-02-01), Allerdist et al.

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