Patents by Inventor Gerald A. Zawadzkas

Gerald A. Zawadzkas 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 forming a high temperature, high pressure thin foil seal
    Patent number: 4477710
    Abstract: A vacuum or high pressure seal operative at high temperatures is formed by placing a thin metal foil over an opening, and forming an electrical seam weld at the interface of the surface and the foil by guiding a needle-like electrode along a path around the opening at a substantially constant rate, with substantially constant pressure being applied to the electrode as it is moved along the path. When supported, the seal is capable of withstanding high pressures, say ten atmospheres, at high temperatures, say 500.degree. C.
    Type: Grant
    Filed: October 10, 1979
    Date of Patent: October 16, 1984
    Assignee: University of Rochester
    Inventors: Gerald A. Zawadzkas, Mau-Song Chou