Cutting/expanding tool

Details Cutting/expanding tool Cutting/expanding tool

1992-12-11

1994-04-26

Taylor, Dennis L.

Hydraulic and earth engineering

Subterranean or submarine pipe or cable laying, retrieving,...

30 925, 166 553, 166 557, 405156, 405184, F16L 100, F16L 5518

Patent

active

053061012

ABSTRACT:
A cutting/expanding tool includes a cylindrical support body having a guide side and a cutting side, a pair of guide rollers mounted in tandem along the longitudinal axis of the support body on the guide side, a cutting wheel mounted between the tandem guide rollers on the cutting side of the support body, and an expander connected rearwardly of the support body. A plurality of cutting wheels may also be provided, each of progressively increasing diameter. A scoring wheel may be mounted forwardly of the cutting wheels to prescore the surface to be cut, so as to facilitate the cutting action, and a deburrer may be mounted rearwardly of all the cutting wheels so as to smooth the cut edge. A method of using the cutting/expanding tool is also described, whereby after the tool has been propelled through a buried main to cut and to expand it, a replacement main is drawn back through the existing main. A conical, wedge or pie shaped expander may be used.

REFERENCES:
patent: 2983042 (1961-05-01), Frantz et al.
patent: 3181302 (1965-05-01), Lindsay
patent: 4648746 (1987-03-01), Abinett
patent: 4674914 (1987-06-01), Wayman et al.
patent: 4903406 (1990-02-01), Schosek et al.
patent: 4983071 (1991-01-01), Fisk et al.

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