Tools – Wrench – screwdriver – or driver therefor – Attachment – or including adjunct or replaceable portion
Reexamination Certificate
2007-07-24
2007-07-24
Thomas, David B (Department: 3723)
Tools
Wrench, screwdriver, or driver therefor
Attachment, or including adjunct or replaceable portion
C269S249000, C269S258000, C269S164000
Reexamination Certificate
active
11447364
ABSTRACT:
A loosening tool for breaking loose tightened threads of a pipe coupling using a plurality of wrench type devices is provided that is simple to use, offers more breakage force than muscling alone, and is relatively safe and effective in its operation. The loosening tool includes a forward facing support jaw, a base bar that supports a corresponding rearward facing support jaw and an adjusting mechanism used to move the forward facing support jaw from a ready position to a loosened position such that the pipe coupling moves to a less tightened position.
REFERENCES:
patent: 1497107 (1924-06-01), Lasell
patent: 2540553 (1951-02-01), Shobe
patent: 3811668 (1974-05-01), Kotter
patent: 4305316 (1981-12-01), Lehman
patent: 4363475 (1982-12-01), McCarty
patent: 5062326 (1991-11-01), Goldschmidt
patent: 5788809 (1998-08-01), Brennan
Knoblock Fred
Knoblock Kris
Law Office of Robert M Patino
Thomas David B
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