Patents by Inventor Darrell W. Rall

Darrell W. Rall 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).

  • Retainer gasket construction
    Patent number: 7401404
    Abstract: Sealing gasket construction for providing a fluid seal intermediate a pair of opposed, mating parts or structures. The gasket includes a metal retainer and a resilient seal element received in a groove formed into the retainer. Such groove is adapted to be fabricated by coining or a like sheet metal stamping or forming process.
    Type: Grant
    Filed: July 27, 2004
    Date of Patent: July 22, 2008
    Assignee: Parker-Hannifin Corporation
    Inventors: William P. Yetter, Douglas C. Schenk, Darrell W. Rall