Patents by Inventor Elmer E. Eiffler

Elmer E. Eiffler 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 of treating a coating on a reactor coolant pump sealing surface
    Patent number: 4978487
    Abstract: An annular chromium carbide coating on an annular sealing surface of a stainless steel sealing assembly component for use in a nuclear reactor coolant pump, is treated by encasing at least the chromium carbide coating on the stainless steel sealing surface by applying a metallic cover thereover, evacuating the atmosphere between the cover and the coating on the sealing surface, hot isostatic pressing the stainless steel sealing assembly component and the chromium carbide coating thereon encased by the cover, cooling the sealing assembly component and the coating thereon encased by the cover, and after cooling thereof removing the cover from the coating. The result is a chromium carbide coating on the sealing component substrate densified substantially to its full theoretical density (greater than 99%) and metallurgically bonded by the hot isostatic pressing to the substrate exterior surface.
    Type: Grant
    Filed: January 13, 1989
    Date of Patent: December 18, 1990
    Assignee: Westinghouse Electric Corp.
    Inventors: Elmer E. Eiffler, Natraj C. Iyer, Alan T. Male, David J. Boes