Patents by Inventor David K. Perry

David K. Perry 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).

  • Controlled leakage rotating seal ring with elements for receiving and holding a lubricant on a face thereof
    Patent number: 6189896
    Abstract: A seal ring mountable to a rotating member for rotation therewith, the seal ring including a gap or other feature providing controlled leakage therethrough, a radial inner circumferential face, an opposite radial outer circumferential face, and at least one axial end face extending between the inner circumferential face and the outer circumferential face, wherein at least one face includes elements for receiving and holding a lubricant for providing lubrication between the face and a surface located in opposing relation thereto during rotation of the seal ring relative to the surface.
    Type: Grant
    Filed: April 8, 1999
    Date of Patent: February 20, 2001
    Assignee: Caterpillar Inc.
    Inventors: Alan M. Dickey, Kristy J. Johnson, David K. Perry