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:
Oct. 17, 2006
Filed:
Oct. 21, 2004
Applicants:
Padmasiri Daya Seneviratne, Fullerton, CA (US);
Lawrence Wells, Yorba Linda, CA (US);
David B. Mason, Anaheim Hills, CA (US);
Inventors:
Padmasiri Daya Seneviratne, Fullerton, CA (US);
Lawrence Wells, Yorba Linda, CA (US);
David B. Mason, Anaheim Hills, CA (US);
Assignee:
Varco I/P, Inc., Orange, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16L 7/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
An internal blow out preventer is provided that includes a ball valve including a tubular assembly having a central passageway with upper and lower seats mounted therein. A ball is rotatably received between the upper and lower seats and includes an external surface and a central opening, wherein the central opening includes an undercut. A protective coating is applied to both the external surface and the undercut of the ball.