Patents by Inventor Jerald L. Smith

Jerald L. Smith 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).

  • Seals containing composite non-extrusion springs
    Patent number: 5791657
    Abstract: A wellhead seal assembly for sealing between first and second pipe members comprises an annular elastomeric body having, in cross-section, a generally rectangular shape comprising a first flat radial surface, a second flat radial surface, an inner circumferential surface and an outer circumferential surface; said inner circumferential surface comprises a generally convex portion that extends from an imaginary plane connecting the inner circumferential edge of each of said first radial surface and said second radial surface; said seal assembly further comprises at least one annular, non-metallic spring member in said elastomeric body positioned generally tangentially to the intersection of either of said radial surfaces with said inner circumferential surface.
    Type: Grant
    Filed: January 7, 1997
    Date of Patent: August 11, 1998
    Assignee: FMC Corporation
    Inventors: David E. Cain, Andrew C. Posluszny, Rudolf R. Schoen, Jerald L. Smith, Robert K. Stoddard, John C. Vicic, Christopher E. Cunningham, Steven M. French, Jim Tait