Cylinder locks and keys therefor

Details Cylinder locks and keys therefor Cylinder locks and keys therefor

1982-03-29

1985-02-12

Larson, Lowell A.

Metal deforming

With cutting

Machining between plural metal-deforming operations

70401, 76110, B21D 5342

Patent

active

044983271

ABSTRACT:
A method of forming a key including providing a key blank of V-shaped transverse cross section so as to have two blade portions joined by a base portion. The method further includes forming teeth on the blade portions and then bending the blank to a substantially U-shaped transverse cross section.

REFERENCES:
patent: 570032 (1896-10-01), Luebbers
patent: 1823547 (1931-09-01), Kaefer
patent: 2620649 (1952-12-01), Bernardo
patent: 3736780 (1973-06-01), Singer
patent: 3754422 (1973-08-01), Stackhouse
patent: 3968668 (1976-07-01), Epstein
patent: 4099398 (1978-07-01), Lipschultz

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