Pipe wrench having a fixed positioning ring

Details Pipe wrench having a fixed positioning ring Pipe wrench having a fixed positioning ring

2007-03-06

2007-03-06

Wilson, Lee D. (Department: 3723)

Tools

Wrench, screwdriver, or driver therefor

Handle clutched to head

C081S058000, C081S058200

Reexamination Certificate

active

11091511

ABSTRACT:
A ratchet pipe wrench a C-shaped head including two jaws and a ratchet mechanism is received in the head so as to engage with a C-shaped engaging member rotatably engaged with the space between the two jaws of the head. A C-shaped positioning ring is securely engaged with a groove defined in an inside of the two jaws of the head so that only the engaging member is rotatable relative to the head.

REFERENCES:
patent: 2401128 (1946-05-01), Anderson
patent: 2699082 (1955-01-01), Viets
patent: 2851914 (1958-09-01), Zeckzer
patent: 3175434 (1965-03-01), Bergquist
patent: 4479409 (1984-10-01), Antonius
patent: 5388479 (1995-02-01), Sroka
patent: 5417129 (1995-05-01), Baron
patent: 6032555 (2000-03-01), Whitley
patent: D427866 (2000-07-01), Chabot
patent: 6382051 (2002-05-01), Chang
patent: 6651533 (2003-11-01), Hsien
patent: 6752048 (2004-06-01), Chiang
patent: 6928904 (2005-08-01), Hsien

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