Restoring structure of a lock

Details Restoring structure of a lock Restoring structure of a lock

2006-07-11

2006-07-11

Estremsky, Gary (Department: 3676)

Closure fasteners

Knob rose plates

C292S336300

Reexamination Certificate

active

07073829

ABSTRACT:
A restoring structure of a lock comprises: a sleeve disk, having a first wall and a second wall, the first wall interconnecting a first face and a second face, and the second wall interconnecting the second face and a third face, the first face and the second face defining a recess, the first face further having a projection, and the second wall defining a central hole; an integrally formed rotative tube, inserted through the central hole of the sleeve disk, and having an end which is formed with a bent portion at a location corresponding to the projection of the sleeve disk and has at least one protrusion disposed at a predetermined position, the protrusion abutting against the first face of the sleeve disk; a torsion spring having two legs, adapted to fit onto an outer wall of the rotative tube such that the legs engage on the bent portion of the rotative tube and the projection of the sleeve disk; and a guard ring disposed adjacent to the third face of the sleeve disk and adapted to engage with at least one lateral slot formed on the rotative tube; whereby when the rotative tube is rotated clockwise or counterclockwise at a desired angle, the torsion spring is compressed to create an elastic deformation such that the at least one protrusion of the rotative tube runs toward the projection of the sleeve disk, and when the rotative tube is released, the rotative tube is returned to its original position by a restoration force of the torsion spring.

REFERENCES:
patent: 2778667 (1957-01-01), Young
patent: 5125696 (1992-06-01), Robida et al.
patent: 5666833 (1997-09-01), Gao et al.
patent: 5887465 (1999-03-01), Shen
patent: 6386602 (2002-05-01), Lan
patent: 6575006 (2003-06-01), Don

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