Locks – Operating mechanism – Key
Patent
1999-06-11
2000-05-09
Gall, Lloyd A.
Locks
Operating mechanism
Key
70409, 70419, 70491, 70493, E05B 2706
Patent
active
060587504
ABSTRACT:
An improved lock structure, and especially a lock structure in which a stepped shaped wall of the key hole in the lock core can be cooperated with a key to allow the key to be drawn out regardless of its angular position. The lock core can also be rotated from an unlocking position to a locking position without the key; convenience thus is increased. Besides, a plurality of pusher pins are allocated in multiple directions to increase the difficulty of unlocking by a thief, this can thereby increase theft-proof effect.
REFERENCES:
patent: 1020208 (1912-03-01), Laughlin
patent: 1243936 (1917-10-01), Henckler
patent: 3621688 (1971-11-01), Asmar et al.
patent: 3656328 (1972-04-01), Hughes
patent: 3729964 (1973-05-01), Hsu
patent: 4761977 (1988-08-01), Weatherby
Gall Lloyd A.
Tung Chu International Inc.
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