Key for locking cylinders, particularly for locking systems

Details Key for locking cylinders, particularly for locking systems Key for locking cylinders, particularly for locking systems

1994-10-26

1996-02-27

Gall, Lloyd A.

Locks

Operating mechanism

Key

70358, 70403, 70409, E05B 1902

Patent

active

054938848

ABSTRACT:
A key for a rotationally adjustable cylinder core (4) with a lock cylinder (3) containing a cryptochannel (11) freely leading into the peripheral area of the cylinder core (4) and, more particularly, to a key for a cylinder core of locking systems, which is provided with a profiled region (15), which is provided with lateral recesses (such as 17, 18), facing the back of the key that is flush with the peripheral area of the cylinder core when the key is inserted, and with a notched region (13), which faces the opposite key breast, can be inserted into the central cylinder core region of the cryptochannel (11), has a round, cylindrical and, particularly, a circular, cylindrical shape, as well as milled slots, depressions or similar notches (16) disposed peripherally and axially offset in the key for arranging tumbler elements (8), which are mounted in the lock cylinder (3) and can be adjusted radially to the core center of the lock cylinder (3). In order to impart even greater stability and provide an even larger peripheral surface for accommodating even more recesses and in order to avoid sharp edges in the region of the back of the key, the profiled region (15) of the key as well as the notched region (13) of the key has a round, cylindrical and, particularly, a circular, cylindrical shape and is connected with the notched region (13) by way of a waist region (14), which is short yet narrow.

REFERENCES:
patent: 707757 (1902-08-01), Bryda
patent: 857439 (1907-06-01), Calicchio
patent: 925122 (1909-06-01), Merlonetti
patent: 1459290 (1923-06-01), Habenicht
patent: 1793432 (1931-02-01), Sczepczenski
patent: 3817066 (1974-06-01), Pearson
patent: 5131249 (1992-07-01), Baden et al.

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