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. 30, 2007
Filed:
Aug. 09, 2005
Padmasiri Daya Seneviratne, Fullerton, CA (US);
Lawrence Wells, Yorba Linda, CA (US);
David B. Mason, Anaheim Hills, CA (US);
Padmasiri Daya Seneviratne, Fullerton, CA (US);
Lawrence Wells, Yorba Linda, CA (US);
David B. Mason, Anaheim Hills, CA (US);
Varco I/P, Inc., Orange, CA (US);
Abstract
A triple-valve internal blow out preventer having unitary construction is provided, each 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 may include an undercut. A protective coating may also be applied to both the external surface and the undercut of the ball to increase the durability of each of the valves.