The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 11, 1998
Filed:
Jan. 07, 1997
David E Cain, Houston, TX (US);
Andrew C Posluszny, Houston, TX (US);
Rudolf R Schoen, Houston, TX (US);
Jerald L Smith, Conroe, TX (US);
Robert K Stoddard, Kingwood, TX (US);
John C Vicic, Santa Cruz, CA (US);
Christopher E Cunningham, Kongsberg, NO;
Steven M French, New Brighton, MN (US);
Jim Tait, Dunfermline, GB;
FMC Corporation, Chicago, IL (US);
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.