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:
Dec. 19, 2000
Filed:
Aug. 01, 1997
Jack Pollack, Calabasas Hills, CA (US);
Robert M Hobson, Roquebrue-Cap-Martin, FR;
Imadco, Inc., , US;
Abstract
A seal is provided for an offshore fluid swivel to seal a gap passage (34) leading from a transfer chamber (20) to the environment, which uses pressured fluid to apply a variable pressure that pushes the seal tightly against a sealed surface (52) on one side of the gap passage. In one arrangement, a ring-shaped seal device includes a seal body (82) of largely U-shaped cross-section, with a base (84) and a pair of legs (86, 88) extending from opposite sides of the base, with the base and at least one leg sealing against walls of the cavity that holds the seal. A hose (90) lies between the two legs and against the base of the seal body, and pressured fluid of greater than chamber fluid pressure is applied to the hose to expand it and thereby push apart the legs of the seal body. In another arrangement pressured fluid of greater than chamber pressure is used to push the entire seal body (152, 152D, 152E, 210) towards the sealed surface (52) and expand the body against upstream and downstream cavity walls (60, 70, 230, 232).
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile