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. 22, 2004
Filed:
Jan. 16, 2003
Applicant:
Inventor:
Robert Emmett, Lancaster, GB;
Assignee:
BSW Limited, Lancaster, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16L 1/12 ; F16L 5/510 ; B66C 1/00 ;
U.S. Cl.
CPC ...
F16L 1/12 ; F16L 5/510 ; B66C 1/00 ;
Abstract
To obviate the need for hydraulic lines, from the surface, external water pressure is used to compress a seal member and form a seal with a surrounding pip. Valve is opened at depth to allow water to act on a piston, moving it within a chamber so as to compress the seal member. A second valve may be opened so that water acts on the opposite end of the piston to release the seal member.