Tools – Wrench – screwdriver – or driver therefor – Having work engaging and force exerting portion inserted...
Reexamination Certificate
2006-06-13
2006-06-13
Thomas, David B. (Department: 3723)
Tools
Wrench, screwdriver, or driver therefor
Having work engaging and force exerting portion inserted...
C081S448000
Reexamination Certificate
active
07059222
ABSTRACT:
A slide stop device of a hexagonal spanner serves for preventing a rounded edged inner hexagonal screw to slide as the hexagonal spanner drives the inner hexagonal screw. The slide stop device comprises a spanner body; one end of the spanner body having a driving portion; the driving portion having three axial slots; and a screw hole extending from the tapered hole; a resisting element formed by a screw unit, a tapered resisting unit having a shape corresponding to that of the tapered hole, and a spring. In assembly, the screw unit and the resisting unit are placed in the tapered hole; and the spring is placed between the tapered hole and the resisting unit. The screw unit is screw into the screw hole, while a head of the screw unit resists against the step portion and a part of the resisting element exposes from the tapered hole.
REFERENCES:
patent: 1058454 (1913-04-01), Moores
patent: 2404427 (1946-07-01), Bloomfield
patent: 2991674 (1961-07-01), Uhl
patent: 3600984 (1971-08-01), Bihlmaier
patent: 4696102 (1987-09-01), Overbay
patent: 4724608 (1988-02-01), Parrott
patent: 5025688 (1991-06-01), Davis
patent: 5927165 (1999-07-01), Vasudeva
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