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. 24, 2004
Filed:
Feb. 12, 2001
Bernard Herman Van Bilderbeek, London, GB;
Craig Francis Bryce Hendrie, Wimbledon, GB;
Shell Oil Company, Houston, TX (US);
Abstract
A sealing device is provided for making a seal against an annular surface. The device includes at least one flexible seal ring having a relaxed position in which the seal ring is out of contact with the surface and an active position in which the seal ring is in sealing contact with the surface, an operating member movable relative to the seal ring in a direction substantially parallel to the annular surface to produce a substantially radial movement of the ring into the active position, and a plurality of elongate, substantially parallel shape-memory material actuators arranged around the annular surface. A change of shape of the actuators produces the movement of the operating member which moves the seal ring into the active position.