Patents by Inventor Jack C. Spanner

Jack C. Spanner has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method for repairing heat exchanger tubing through partial tube replacement
    Patent number: 6247231
    Abstract: A method of repairing a heat exchanger tube in a steam generator includes the step of removing a degraded tube segment from an operative heat exchanger tube in a steam generator. A weld metal ring is then positioned between the operative heat exchanger tube and a new tube segment. The weld metal ring is then welded to the operative heat exchanger tube and the new tube segment to form a linking tube section. The linking tube section is then heat treated. The new tube segment is then expanded toward a steam generator tubesheet. Finally, the new tube segment is welded to the tube sheet.
    Type: Grant
    Filed: August 27, 1997
    Date of Patent: June 19, 2001
    Assignee: Electric Power Research Institute
    Inventors: Shane Joseph Findlan, Jack C. Spanner