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. 22, 2013
Filed:
Apr. 23, 2008
Applicants:
Andrew Dale Riley, Eufaula, OK (US);
Randall Ferrain Weaver, Haywood, OK (US);
Inventors:
Andrew Dale Riley, Eufaula, OK (US);
Randall Ferrain Weaver, Haywood, OK (US);
Assignee:
National Oilwell Varco, L.P., Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16J 1/06 (2006.01);
U.S. Cl.
CPC ...
Abstract
A reciprocating pump including a piston is disclosed. In some embodiments, the piston includes an annular hub, a flexible sealing element coupled to an outer surface of the hub, and a sleeve seated on the outer surface of the hub adjacent the sealing element. The sleeve is axially moveable relative to the hub to compress the sealing element. The sealing element includes a lip, which is displaced radially outward when the sleeve compresses the sealing element.