Patents by Inventor Jay T. Duke

Jay T. Duke 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).

  • High pressure rotary shaft seal
    Patent number: 4717160
    Abstract: A seal assembly for a shaft comprises one or more annular sealing elements having an initial internal diameter larger than the diameter of the shaft. The elements are deformed by a pair of annular backup rings disposed on opposite sides thereof. The backup rings have opposed axially extending undulations therein for effecting axial deformation and radial contraction of the sealing elements upon advancement of the backup rings toward one another.
    Type: Grant
    Filed: April 21, 1986
    Date of Patent: January 5, 1988
    Assignee: Microdot Inc.
    Inventors: Gordon T. Zitting, Jay T. Duke