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:
Jun. 21, 1988
Filed:
Apr. 30, 1987
Thomas G Cassity, Katy, TX (US);
Cameron Iron Works USA, Inc., Houston, TX (US);
Abstract
The improved wellhead seal assembly includes an annular metal seal ring having upper spaced apart inner and outer rims with an upper energizing ring positioned between such rims and movable axially between them, a resilient seal embedded in and extending through ports in the central portion of the seal ring, lower inner and outer seal rings connected to said central portion of said seal ring by inner and outer bellows and a wedging ring depending from the central portion of the seal ring between such bellows and adapted to move downward between the inner and outer seal rings to wedge them apart into sealing engagement with the inner and outer sealing surfaces, such movement being responsive to downward movement of the upper energizing ring and the flexing of the lower bellows legs and continued movement of said upper energizing ring wedging said upper rims apart into sealing engagement with the inner and outer sealing surfaces, the upper energizing ring being releasably connected to the upper seal rims so that said upper seal is not set until the lower seal is completely energized and set.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile