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Tube cutter tool and method of use for coupon removal

United States Patent

5,626,445
May 6, 1997
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
A tube cutter tool is insertable into a tube for cutting a coupon from a damaged site on the exterior of the tube. Prior to using the tool, the damaged site is first located from the interior of the tube using a multi-coil pancake eddy current test probe. The damaged site is then marked. A fiber optic probe is used to monitor the subsequent cutting procedure which is performed using a hole saw mounted on the tube cutter tool. Prior to completion of the cutting procedure, a drill in the center of the hole saw is drilled into the coupon to hold it in place.
Nachbar; Henry D. (Ballston Lake, NY), Etten, Jr.; Marvin P. (Ballston Lake, NY), Kurowski; Paul A. (Scotia, NY)
The United States of America as represented by the United States (Washington, DC)
08/ 376,150
January 23, 1995
The U.S. Government has rights in this invention pursuant to Contract Number DE-AC12-76-SN00052 awarded by the U.S. Department of Energy.