Pneumatic pipe wrench and associated method

Details Pneumatic pipe wrench and associated method Pneumatic pipe wrench and associated method

2007-08-21

2009-12-29

Muller, Bryan R (Department: 3727)

Tools

Wrench, screwdriver, or driver therefor

Having work engaging and force exerting portion inserted...

C081S442000, C081S448000

Reexamination Certificate

active

07637186

ABSTRACT:
A pneumatic pipe wrench includes an elongated shaft provided with axially opposed top and bottom ends respectively and a cylindrical shaft guide removably connected to the shaft. The apparatus further includes a mechanism for attaching the shaft guide to the shaft, a mechanism for removably securing the bottom end of the shaft to an inner surface of the existing length of pipe, and a mechanism for loosening the existing length of pipe. Such a loosening mechanism is removably connected to the shaft. The loosening mechanism includes the handle of the pumping mechanism and the depressions of the shaft.

REFERENCES:
patent: 1354538 (1920-10-01), Devereaux
patent: 1518087 (1924-12-01), McMullen
patent: 1672053 (1928-06-01), Brown
patent: 1908622 (1933-05-01), Baker et al.
patent: 2018154 (1935-10-01), Scott
patent: 2468867 (1949-05-01), Collins
patent: 2624609 (1953-01-01), Storm
patent: 3296900 (1967-01-01), Behnke
patent: 5224401 (1993-07-01), Cesari et al.

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