Patents by Inventor William H. Shoffner

William H. Shoffner 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).

  • Tamper resistant trailer hitch
    Patent number: 5018759
    Abstract: A tamper resistant trailer hitch. The trailer hitch includes a body with a hitch ball receiving cavity therein and a conventional coupling mechanism. The hitch may be locked in a coupled position on the hitch ball or in an uncoupled position in which the ball receiving cavity is covered to provide tamper resistance. In a first embodiment, a side opening coupling configuration is used with the cover mounted on a rotating locking ring. In a second embodiment, a pivoting locking plate is mounted on the lower side of the hitch. In a third embodiment, a sliding locking plate is mounted on the lower side of the hitch.
    Type: Grant
    Filed: October 23, 1989
    Date of Patent: May 28, 1991
    Assignee: Guardian Hitch, Inc.
    Inventors: S. Leonard Villalon, James D. Olds, William H. Shoffner
  • Tamper resistant trailer hitch
    Patent number: 4925205
    Abstract: A tamper resistant trailer hitch. The trailer hitch includes a body with a hitch ball receiving cavity therein and a conventional coupling mechanism. The hitch may be locked in a coupled position on the hitch ball or in an uncoupled position in which the ball receiving cavity is covered to provide tamper resistance. In a first embodiment, a side opening coupling configuration is used with the cover mounted on a rotating locking ring. In a second embodiment, a pivoting locking plate is mounted on the lower side of the hitch. In a third embodiment, a sliding locking plate is mounted on the lower side of the hitch.
    Type: Grant
    Filed: November 3, 1987
    Date of Patent: May 15, 1990
    Assignee: Guardian Hitch, Inc.
    Inventors: S. Leonard Villalon, James D. Olds, William H. Shoffner
  • High pressure gauge carrier
    Patent number: 4735264
    Abstract: The high pressure gauge carrier of the present invention uses an outer gauge carrier housing having disposed therein a pressure-tight inner housing carrying a temperature gauge in the interior thereof. The inner housing is substantially filled with a compressible liquid, and the pressure tight connections of the inner housing incorporated metal to metal seals in order to eliminate the failure of elastomeric seals at the elevated temperatures encountered by the gauge carrier.
    Type: Grant
    Filed: July 30, 1986
    Date of Patent: April 5, 1988
    Assignee: Halliburton Company
    Inventors: Wesley J. Burris, II, Vincent P. Zeller, Jon B. Christensen, William H. Shoffner