Patents by Inventor John R. Bumgarner

John R. Bumgarner 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).

  • Isostatic bulge forming
    Patent number: 5419171
    Abstract: A method and apparatus are provided for isostatically bulge forming tube stock. The tube is assembled in sealing arrangement with a split die. The assembly is placed in a pressure vessel wherein an non-compressible fluid is pressurized to form the tube into the die cavities. Because the force on the tooling is compressive in nature, relatively low strength, low cost tools may be used.
    Type: Grant
    Filed: October 14, 1993
    Date of Patent: May 30, 1995
    Assignee: The Boeing Company
    Inventor: John R. Bumgarner