Patents by Inventor David A. Beale

David A. Beale 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).

  • Pressure and vacuum relief valve assembly
    Patent number: 4109674
    Abstract: In a pressure and vacuum relief valve assembly for a container that normally operates to limit pressure in the container both above and below atmospheric pressure, an auxiliary seal arrangement is provided that operates to prevent leakage from the container during and after an abnormal pressure surge.
    Type: Grant
    Filed: May 25, 1977
    Date of Patent: August 29, 1978
    Assignee: General Motors Corporation
    Inventor: David A. Beale