Patents by Inventor Mark A. Stamback, deceased

Mark A. Stamback, deceased 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).

  • Upside-down square-up valve stem seal
    Patent number: 7299779
    Abstract: A valve stem seal of an internal combustion engine is described wherein the valve stem seal includes an outer peripheral surface and an inner sealing surface. The inner sealing surface minimizes ingress of a liquid upwardly from an intake port area into an overhead engine area by having at least one sealing lip disposed on an upper portion of the inner sealing surface and extending away from the inner sealing surface. The sealing lip includes a generally square lower corner.
    Type: Grant
    Filed: September 28, 2005
    Date of Patent: November 27, 2007
    Assignee: Dana Corporation
    Inventors: Timothy A. Hegemier, Cathy Stamback, legal representative, Mark A. Stamback, deceased