Pipe wrench retrofit

Details Pipe wrench retrofit Pipe wrench retrofit

2006-05-09

2006-05-09

Wilson, Lee D. (Department: 3723)

Tools

Wrench, screwdriver, or driver therefor

Slidable jaw adjustments

C081S167000, C081S165000

Reexamination Certificate

active

07040199

ABSTRACT:
The specification discloses a modified nut assembly and locking assembly for locking the shank of a wrench in place. The nut assembly preferably includes a nut for engaging and disengaging the shank of the wrench and a spring for biasing the nut to a position where the shank of the wrench is locked in place. Threads internal to the nut matingly engage threads on the shank of the wrench when in a locked position, and grooves internal to the nut allow the shank of the wrench to slide freely through the nut when in an unlocked position. The locking assembly preferably includes a housing, a sliding portion, a locking portion, and a spring. The sliding portion and locking portion preferably abut each other within the housing. The spring is preferably located in the sliding portion and extends from the sliding portion to the shank of the wrench.

REFERENCES:
patent: 1301958 (1919-04-01), Mendenhall
patent: 2345650 (1944-04-01), Attwood
patent: 2597403 (1952-05-01), Tedesco
patent: 2704478 (1955-03-01), Webb
patent: 3636800 (1972-01-01), Myers
patent: 3996820 (1976-12-01), Tuell
patent: 4144779 (1979-03-01), Honick
patent: 4222310 (1980-09-01), Garrett et al.
patent: 4309924 (1982-01-01), McLain
patent: 4315393 (1982-02-01), Schack et al.
patent: 4903555 (1990-02-01), Howard
patent: 5516247 (1996-05-01), Hosoda et al.
patent: 5749690 (1998-05-01), Kutz
patent: 5810532 (1998-09-01), Huang

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