Pipe wrench

Details Pipe wrench Pipe wrench

2006-08-29

2006-08-29

Wilson, Lee D. (Department: 3723)

Tools

Wrench, screwdriver, or driver therefor

Pivoted outer jaw

C081S111000

Reexamination Certificate

active

07096764

ABSTRACT:
A Pipe Wrench with: reasonable coordination on distance between—Center of Arcuate Teeth and Link-Hole, eccentric length of Tips of Arcuate Teeth and Link-Hole; Instant Grip and Release, Time-Saving, Power-Saving, easy Operation is disclosed. It is composed of Heading-Hook, Main Body, Arcuate Jaw-Block, Spring-Guard Plate, Spring, Oil-Rope, Pin and Screw Bolt. The Jaw-Block designed by two (2) different sizes of Arc is inlaid in Slot B on Handle, due to designed size of Link-Hole being eccentric from center of Arcs of Jaw-Block is well coordinated with Arcs on Tip Teeth of Jaw-Block, which enables this Invention with Reliable and Firm Self-Lock on workpiece as well as its Open-Width being enlarged.

REFERENCES:
patent: 1442351 (1923-01-01), Martin
patent: 1577789 (1926-03-01), Conway
patent: 2028406 (1936-01-01), Mead
patent: 2057899 (1936-10-01), Lucas
patent: D143898 (1946-02-01), Brintnall
patent: 2441144 (1948-05-01), Gregory
patent: 2559973 (1951-07-01), Kunz
patent: 2559974 (1951-07-01), Kunz
patent: 2958246 (1960-11-01), Osborn
patent: 5251518 (1993-10-01), Woo
patent: 6742419 (2004-06-01), Chartier et al.
patent: 2004/0154440 (2004-08-01), Chartier et al.

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