Screwing device

Details Screwing device Screwing device

2008-08-06

2010-11-23

Thomas, David B (Department: 3723)

Tools

Wrench, screwdriver, or driver therefor

Machine

Reexamination Certificate

active

07836796

ABSTRACT:
A screwing device includes a holder, an interaction unit and a screwing unit. The holder has a rotation axle. The interaction unit is connected to the rotation axle and has an interaction ring. The screwing unit has a plurality of screwing elements and interacts with the inner peripheral surface of the interaction ring. When the holder rotates along a screwing direction, the interaction ring also rotates along the same screwing direction and drives the screwing unit to rotate along the same screwing direction.

REFERENCES:
patent: 2444602 (1948-07-01), Hardie
patent: 6058810 (2000-05-01), Junkers
patent: 6134989 (2000-10-01), Stevens
patent: 6668685 (2003-12-01), Boston
patent: 2004/0001316 (2004-01-01), Kamikawa
patent: 2004/0250639 (2004-12-01), Winkler
patent: 2005/0188795 (2005-09-01), Woltz
patent: 2006/0236817 (2006-10-01), Junkers
patent: 1803406 (2006-07-01), None
patent: 2867805 (2007-02-01), None

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