Patents by Inventor Jan T. Stover

Jan T. Stover 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 and apparatus for repairing superalloy components
    Patent number: 6673169
    Abstract: A method of repairing a metallic component, such as a superalloy turbine blade or turbine nozzle, includes the step of preparing the component by stripping the protective coatings from the component. The component is then pre-conditioned for welding by a first hot isostatic process. Once the conditioning sequence is complete, the component is welded using any of a number of welding techniques and by adding weld fillers to the weld area. After the welding step, the component is sealed by a second hot isostatic process treatment performed at conditions similar to the first hot isostatic process. The component is finally prepared for re-entry into service.
    Type: Grant
    Filed: April 1, 2002
    Date of Patent: January 6, 2004
    Assignee: Electric Power Research Institute, Inc.
    Inventors: Artie Gene Peterson, Jr., David Wayne Gandy, Gregory J. Frederick, Jan T. Stover, Ramaswamy Viswanathan
  • Apparatus and method of repairing turbine blades
    Patent number: 6364971
    Abstract: A method of repairing a metallic member, such as a superalloy turbine blade, includes the step of preparing the blade by stripping the protective coatings from the blade. The blade is then pre-conditioned for welding by a first hot isostatic process. Once the blade conditioning sequence is complete, the blade is welded using a laser welding technique and by adding weld fillers to the weld area. After the welding step, the blade is sealed by a second hot isostatic process treatment performed at conditions similar to the first hot isostatic process. The blade is finally prepared for re-entry into service.
    Type: Grant
    Filed: January 20, 2000
    Date of Patent: April 2, 2002
    Assignee: Electric Power Research Institute
    Inventors: Artie Gene Peterson, Jr., David Wayne Gandy, Gregory Frederick, Jan T. Stover, Ramaswamy Viswanathan