Patents by Inventor Bradley W. Hanson

Bradley W. Hanson 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).

  • Countergravity casting apparatus
    Patent number: 4828011
    Abstract: Immersion-type vacuum countergravity casting apparatus having a vacuum chamber including spring means for pressing the mold portions sealingly together and/or resisting destructive inward flexure of the mold. A split vacuum chamber, including a floating lower skirt portion, avoids the creation of stress concentration sites between the chamber and the mold.
    Type: Grant
    Filed: June 24, 1988
    Date of Patent: May 9, 1989
    Assignee: General Motors Corporation
    Inventors: Paul H. Hafer, Bradley W. Hanson, Jeffrey D. Porter, James Smith, Jr.