Tools – Wrench – screwdriver – or driver therefor – Having work engaging and force exerting portion inserted...
Reexamination Certificate
2006-04-11
2006-04-11
Wilson, Lee D. (Department: 3723)
Tools
Wrench, screwdriver, or driver therefor
Having work engaging and force exerting portion inserted...
C081S446000, C081S442000
Reexamination Certificate
active
07024972
ABSTRACT:
Disclosed is a tool for both removing and tightening screw-on drains that is simple and easy to use, has a simple design and is easy to manufacture. The tool is capable of engaging an inner surface of a drain flange in a manner that is sufficient to transfer enough force to remove screw-on drain flanges and is capable of use with various designs and sizes of screw-on drain flanges. Different size cams and different lever arms used on the cams allow the tool to optimize the radial force to torque ratio for both removal and insertion of screw-on drain flanges. In addition, nubs are used at the bottom of the drain flange to engage arms that typically are used on drain flanges to further add to the resistance that can be provided between the tool and the drain flange and distribute forces in a dynamic, instantaneous and automatic fashion to optimize removal of the drain flange.
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Pictures of Homemade Tool, 5 Pages.
Ridge Tool—342 Internal Wrench.
BrassCraft T150 Internal Pipe Wrench.
BrassCraft T167 Pipe Nipple Extractor.
Website: Plummingworld.com “Internal Pipe Wrench Set” 2 Pages.
Johnson Steven X.
Werner Gary D.
Cochran William W.
Cochran Freund & Young LLC
Grant Alvin J.
Wilson Lee D.
WJ Technologies, Inc.
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