Patents by Inventor Tod Aldridge

Tod Aldridge 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).

  • Wellhead seal for wide temperature and pressure ranges
    Patent number: 5180008
    Abstract: A wellhead seal for establishing and maintaining a seal between a wellhead and inner pipe element. The seal is an annular elastomeric body having an inner axial surface with a generally convex central portion for pressing against the inner pipe element surrounded by the wellhead and an outer axial surface with a generally concave central portion which, in one embodiment, receives an annular energizing element to increase the sealing force between the body and casing. An annular anti-extrusion ring is provided at the inner edge of each radial end surface.
    Type: Grant
    Filed: December 18, 1991
    Date of Patent: January 19, 1993
    Assignee: FMC Corporation
    Inventors: Tod Aldridge, John A. Fitzgerald, Allan K. McGregor, Ronald D. Quates, Rudolf R. Schoen, Appavoo Thangarasu, John C. Vicic