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:
Apr. 21, 2015
Filed:
Oct. 31, 2012
Applicant:
Canrig Drilling Technology Ltd., Houston, TX (US);
Inventors:
Assignee:
Canrig Drilling Technology Ltd., Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16J 15/32 (2006.01); F16J 15/00 (2006.01);
U.S. Cl.
CPC ...
F16J 15/3216 (2013.01); Y10T 29/49826 (2015.01); F16J 15/008 (2013.01);
Abstract
An apparatus includes a rotatable shaft having a shaft surface and a first seal disposed in a sealing engagement with the shaft surface. At least a second seal is disposed in a first position relative to the rotatable shaft where the second seal is not in sealing engagement with the shaft surface and is movable to a second position relative to the rotatable shaft where the second seal is in sealing engagement with the shaft surface.