Screw fastener

Details Screw fastener Screw fastener

2011-06-21

2011-06-21

Thomas, David B (Department: 3723)

Tools

Wrench, screwdriver, or driver therefor

Machine

Reexamination Certificate

active

07963194

ABSTRACT:
A screw fastener includes a screwdriver that includes a sleeve having an absorption hole configured to absorb a top surface of a screw, a bit housed in the absorption hole and having a tip engageable with a recess of the screw, and a rotation unit configured to rotate the bit with the sleeve, a movement unit configured to move the screwdriver between a container configured to accommodate the screw and a work, a positional shift detector configured to detect a positional shift on a plane between a center axis of the screw perpendicular to the plane and a center axis of the bit perpendicular to the plane, and a controller controls a movement of the movement unit so as to reduce the positional shift, based on a detection result of the positional shift detector.

REFERENCES:
patent: 6681659 (2004-01-01), Hoe et al.
patent: 7586284 (2009-09-01), Akita
patent: 0109447 (1984-05-01), None
patent: 58-206387 (1983-12-01), None
patent: 3-221331 (1991-09-01), None
patent: 4-075828 (1992-03-01), None
patent: 5-60736 (1993-08-01), None
patent: 2008142824 (2008-06-01), None
patent: 2008200799 (2008-09-01), None
patent: 2007/105257 (2007-09-01), None
patent: WO 2008099491 (2008-08-01), None
International Search Report of PCT/JP2008/053801, mailing date of Apr. 1, 2008.

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