Key cylinder automatic returning device for cylinder lock device

Details Key cylinder automatic returning device for cylinder lock device Key cylinder automatic returning device for cylinder lock device

1995-04-28

1997-05-20

Dino, Suzanne L.

Locks

Operating mechanism

Key

70380, 70367, 70DIG36, E05B 910

Patent

active

056303319

ABSTRACT:
A cylinder shaft projects from a key cylinder along the center line of a sleeve, and first and second case shafts project from a case. A spring is coiled on the first case shaft, and the cylinder shaft is placed between the first and second case shafts. The cylinder shaft and the second case shaft are placed between both legs of the spring. When the key cylinder is rotated with respect to the sleeve by the proper key being inserted in the key cylinder, the spring imparts returning force to the cylinder shaft that is making an arcuate movement in a circular-arc groove formed in the case.

REFERENCES:
patent: 1876803 (1932-09-01), Von Mehren
patent: 3310642 (1967-03-01), Zeller
patent: 4633689 (1987-01-01), Wolniak et al.
patent: 4634822 (1987-01-01), Goeke
patent: 4655062 (1987-04-01), Kaufman
patent: 4903512 (1990-02-01), Leroy et al.
patent: 4936895 (1990-06-01), LeClerc et al.
patent: 5186030 (1993-02-01), Lin
patent: 5263348 (1993-11-01), Wittwer
patent: 5265453 (1993-11-01), Konii et al.
patent: 5285667 (1994-02-01), Fukasawa et al.
patent: 5428978 (1995-07-01), Tsukano

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