Profiled key for cylinder locks

Details Profiled key for cylinder locks Profiled key for cylinder locks

2009-02-18

2010-02-23

Barrett, Suzanne D (Department: 3673)

Locks

Operating mechanism

Key

C070S493000, C070S495000

Reexamination Certificate

active

07665337

ABSTRACT:
A key for use in a cylinder lock with a rotatable key plug having a profiled keyway including a longitudinal profile rib at a side wall of the keyway. The key has an elongated, substantially flat key blade (120; 120′) having a longitudinal profile groove (122; 122′) extending along at least a portion of the length of the key blade. The groove has an undercut portion (129) adjacent to a ridge portion (128, 128′), the outside of which forms part of a side surface (123; 123′) of the key blade and the inside of which comprises a side wall portion (126; 126′) being inclined and facing the bottom wall (124; 124′) of the groove. The undercut portion (129; 129′) of the groove is expanded, at its innermost part adjacent to the inclined side wall portion (126; 126′), into a longitudinally extending pocket (135; 135′).

REFERENCES:
patent: 4638651 (1987-01-01), Surko, Jr.
patent: 5640865 (1997-06-01), Widen
patent: 5715717 (1998-02-01), Widen
patent: 5809816 (1998-09-01), Widen
patent: 6851292 (2005-02-01), Kruhn
patent: 7159424 (2007-01-01), Widen
patent: 7487653 (2009-02-01), Widen

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