Screw locking tool

Details Screw locking tool Screw locking tool

2011-04-12

2011-04-12

Thomas, David B (Department: 3723)

Tools

Wrench, screwdriver, or driver therefor

Having work engaging and force exerting portion inserted...

C081S451000

Reexamination Certificate

active

07921753

ABSTRACT:
A screw locking tool includes a main body composed of a shank to be combined with a hand tool and a sleeve. The shank has front end continually connected with the sleeve having its surface disposed with an annular recess with an O-shaped ring fitted therein and bored with insert holes communicating with an accommodating cavity of the sleeve for receiving positioning steel balls, with an elastic element fixed in the accommodating cavity. A screwing element secured with the accommodating cavity has a shank with a minor-diameter and a medium-diameter annular recess for receiving steel balls to prevent the screwing element from slipping off. A receiving groove at the front end of the screwing element is bored with insert holes respectively for fitting a positioning steel ball and has an annular recess fitted therein with an O-shaped ring for positioning the steel balls.

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patent: 6539826 (2003-04-01), Oesterle et al.
patent: 7237464 (2007-07-01), Mekler
patent: 2002/0166421 (2002-11-01), Bowerman
patent: 2006/0278050 (2006-12-01), Hsiao

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