Restricted key system

Details Restricted key system Restricted key system

1991-04-10

1993-01-05

Luebke, Renee S.

Locks

Operating mechanism

Key

70407, 70340, 70421, 70409, E05B 904

Patent

active

051760150

ABSTRACT:
A restricted key system providing keys/key slots with an angled or chevron shaped cross sectional profile. Each key blade of the restricted key system includes an upper planar portion which is bitted or cut to position the standard pin tumblers, an intermediate portion which forms a horizontal ledge, and a lower planar portion which extends from the intermediate portion at an angle in the range of 5.degree.-85.degree. relative to the upper planar portion. The horizontal ledge of the key blade may be provided with at least two additional bitting surfaces for wards, tumblers and/or other key differing elements.

REFERENCES:
patent: 540111 (1895-11-01), Sargent
patent: 588026 (1897-08-01), Stadtmuller
patent: 1915897 (1933-06-01), Maxwell et al.
patent: 2049548 (1936-08-01), Swanson
patent: 2814941 (1957-12-01), Best
patent: 3603123 (1971-09-01), Best
patent: 3797292 (1974-03-01), Taylor
patent: 4213316 (1980-07-01), Tietz
patent: 4294093 (1981-10-01), Best et al.
patent: 4356713 (1982-11-01), Widen
patent: 4416128 (1983-11-01), Steinbrink
patent: 4444034 (1984-04-01), Best et al.
patent: 4683740 (1987-08-01), Errani
patent: 4787225 (1988-11-01), Hauser et al.
patent: 4815307 (1989-03-01), Widen

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