Locks – Operating mechanism – Key
Patent
1993-09-23
1995-07-11
Gall, Lloyd A.
Locks
Operating mechanism
Key
70337, 70493, 70375, 70421, E05B 2704
Patent
active
054310342
ABSTRACT:
A cylinder lock includes a lock shell which confines a cylindrical hole and a rotatable cylindrical key plug provided within the hole of the lock shell and formed with a longitudinally extending keyway. The key plug is further formed with a plurality of first bores which receive a lower tumbler pin of a respective first tumbler set, while the lock shell is further formed with a plurality of second bores which receive an upper tumbler pin of a respective first tumbler set. A plug retaining sleeve has a front portion which extends into the hole of the lock shell and which confines a hollow space for receiving a rear portion of the key plug. The rear portion of the key plug and the front portion of the plug retaining sleeve are respectively formed with third and fourth radially aligned bores which receive a lower tumbler pin of a second tumbler set.
REFERENCES:
patent: Re31910 (1985-06-01), Oliver
patent: 415178 (1889-11-01), Taylor
patent: 1233733 (1917-07-01), Voight
patent: 1788834 (1931-01-01), Hurd
patent: 1832108 (1031-11-01), Falk
patent: 1855607 (1932-04-01), Lyons
patent: 1964787 (1934-07-01), Voight
patent: 1986676 (1935-01-01), Hurd
patent: 2247621 (1941-07-01), Speer
patent: 2481093 (1949-09-01), Dyson
patent: 4194379 (1980-03-01), Dice, Sr.
Chiou Ming-Shyng
Fann Yaw-Shin
Gall Lloyd A.
Tong-Lung Metal Industry Co. Ltd.
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