Tools – Wrench – screwdriver – or driver therefor – Having work engaging and force exerting portion inserted...
Reexamination Certificate
2008-09-16
2008-09-16
Shakeri, Hadi (Department: 3723)
Tools
Wrench, screwdriver, or driver therefor
Having work engaging and force exerting portion inserted...
C081S125000, C279S022000
Reexamination Certificate
active
11604320
ABSTRACT:
A screw bit positioning device includes a tube which has a first hole and a second hole respectively defined through a wall thereof so that a first bead and a second bead are respectively engaged the first and second holes. A movable member is movably received in the passage and located between a stop and a first spring. A sleeve is movably mounted to the tube and cooperates with a second spring mounted on the tube such that when the sleeve is moved, the first and second beads are simultaneously pressed into the tube or received in two respective spaces in the inner periphery of the sleeve. The screw bit and the movable member are positioned when the first and second beads are merged into the tube. When the first and second beads are released, the screw bit is pushed out from the tube by the first spring.
REFERENCES:
patent: 5996452 (1999-12-01), Chiang
patent: 6270085 (2001-08-01), Chen et al.
patent: 6637755 (2003-10-01), Chen et al.
patent: 6973858 (2005-12-01), Huang
patent: 7096768 (2006-08-01), Chen
patent: 7114728 (2006-10-01), Chen
patent: 7287449 (2007-10-01), Abel et al.
patent: 2004/0255732 (2004-12-01), Lin
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