Tools – Wrench – screwdriver – or driver therefor – Sliding jaw face
Reexamination Certificate
2005-09-20
2005-09-20
Thomas, David B. (Department: 3723)
Tools
Wrench, screwdriver, or driver therefor
Sliding jaw face
C081S058200
Reexamination Certificate
active
06945143
ABSTRACT:
The present invention relates to a self-adjustable universal spanner comprising: a spanner head member having a jaw for seating a bolt head and a feed groove. The jaw includes a flat contact surface which is in surface contact with the flat surface of the bolt head in the front lower of the jaw, and includes an escape curved surface and a slope surface for vertex contact in the rear of the flat contact surface. The feed groove includes a spring insert groove with a pin escape groove being installed in the rear thereof and a guide groove for deviation prevention with an escape slope contact surface, a slope surface for slip prevention, a guide protrusion and a elastic support pin. The slope contact surface is formed in the top of the member, and the contact surface for slip prevention is formed in the rear bottom of the flat contact surface. The guide protrusion has a deviation preventing shoulder protrusively installed in the length direction, and the support pin is provided in the rear of the member, wherein the member is slidably inserted in the feed groove means of the spanner head; and a deviation preventing pin keeps the brake piece member from deviating by being inserted in front of the guide groove for deviation prevention. Therefore, the present invention may fasten or loosen a bolt or nut simply, continuously and efficiently without the spanner head being deviated from the bolt or nut.
REFERENCES:
patent: 1308440 (1919-07-01), Morrison
patent: 2855814 (1958-10-01), Yavner
patent: 2879681 (1959-03-01), Blasdell
patent: 3023654 (1962-03-01), Stambaugh et al.
patent: 3717054 (1973-02-01), Thompson
patent: 3858467 (1975-01-01), Evans
patent: 5533428 (1996-07-01), Pradelski
patent: 5579667 (1996-12-01), Kim
patent: 5768958 (1998-06-01), Gamble
patent: 6202516 (2001-03-01), Kim
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