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Automated internal pipe cutting device

United States Patent

January 21, 2003
View the Complete Patent at the US Patent & Trademark Office
U.S. Department of Energy - Visit the Office of the Assistant General Counsel for Technology Transfer & Intellectual Property Website
The invention is a remotely controlled internal pipe cutting device primarily used for cutting pipes where the outside of the pipe is inaccessible at the line where the cut is to be made. The device includes an axial ram within a rotational cylinder which is enclosed in a housing. The housing is adapted for attachment to an open end of the pipe and for supporting the ram and cylinder in cantilever fashion within the pipe. A radially movable cutter, preferably a plasma arc torch, is attached to the distal end of the ram. A drive mechanism, containing motors and mechanical hardware for operating the ram and cylinder, is attached to the proximal end of the housing. The ram and cylinder provide for moving the cutter axially and circumferentially, and a cable assembly attached to a remote motor provide for the movement of the cutter radially, within the pipe. The control system can be adjusted and operated remotely to control the position and movement of the cutter to obtain the desired cut. The control system can also provide automatic standoff control for a plasma arc torch.
Godlewski; William J. (Clifton Park, NY), Haffke; Gary S. (Ballston Spa, NY), Purvis; Dale (Amsterdam, NY), Bashar; Ronald W. (Oakdale, CT), Jones; Stewart D. (Mechanicville, NY), Moretti, Jr.; Henry (Cranston, RI), Pimentel; James (Warwick, RI)
The United States of America as represented by the United States Department of Energy (Washington, DC)
09/ 657,002
September 7, 2000
ACKNOWLEDGMENT OF FEDERAL RESEARCH SUPPORT This invention was made or conceived in the course of or under a contract with the U.S. Department of Energy.