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:
Oct. 10, 1995
Filed:
Jun. 03, 1994
Carl F Boehm, Jr, Houston, TX (US);
David L Ford, Katy, TX (US);
Herman O Henderson, Jr, Houston, TX (US);
ABB Vetco Gray Inc., Houston, TX (US);
Abstract
A seal for a wellhead housing employs a locking groove. The seal is of a U-shape, having an inner and outer radially spaced apart legs. An energizing ring is stroked downward to force the legs apart to cause them to seal between the wellhead housing in the conduit and the wellhead housing. At least one groove is located on one side of the energizing ring, with the groove being of a saw-toothed shape to allow entry but to resist upward movement of the energizing ring. In a metal version of a seal, the groove is located on the exterior of the energizing ring so as to allow some axial movement of the inner leg of the seal relative to the energizing ring. In a second version, the seal is of plastic.