Screw tightener

Details Screw tightener Screw tightener

1996-11-14

1999-05-04

Smith, James G.

Tools

Wrench, screwdriver, or driver therefor

Machine

81 5737, B25B 2304

Patent

active

058991263

ABSTRACT:
A screw tightener using coupled screws comprises: a screw tightener body including a driver bit; a nose portion movable in the axial direction of the driver bit; a spring usually urging the nose portion to move forward from the screw tightener body; a feed wheel rotatably supported by the nose portion, wherein coupled screws supplied to the nose portion are fed in the direction of extension of the driver bit by interlocking the rotation of the feed wheel with the movement of the nose portion to be forced into the screw tightener body; retaining members for mutually retaining the screw tightener body and the nose portion when the indentation force is released after the nose portion is moved to be forced partway into the screw tightener body; and guide groove for preventing the retaining members from retaining when the nose portion is caused by the spring to undergo a reset movement with respect to the screw tightener body after the nose portion is moved to be forced into the screw tightener body by a predetermined movement.

REFERENCES:
patent: 3834252 (1974-09-01), Abell et al.
patent: 4762035 (1988-08-01), Fushiya et al.
patent: 5083483 (1992-01-01), Takagi
patent: 5138913 (1992-08-01), Chen
patent: 5167174 (1992-12-01), Fujiyama et al.
patent: 5339713 (1994-08-01), Hou
patent: 5402695 (1995-04-01), Hornung
patent: 5473965 (1995-12-01), Chen

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