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:
Dec. 04, 2012
Filed:
Mar. 10, 2005
Robert Arnold Judge, Houston, TX (US);
Peringandoor Raman Hariharan, Houston, TX (US);
Robert Arnold Judge, Houston, TX (US);
Peringandoor Raman Hariharan, Houston, TX (US);
Hydril USA Manufacturing LLC, Houston, TX (US);
Abstract
A pump includes a housing partially bounded by first and second outer walls, an inner wall fixed within a bore, a first piston disposed between the first outer wall and the inner wall, a second piston disposed between the second outer wall and the inner wall, a coupling member coupling the first and second pistons, a plurality of valves, and a control unit configured to communicate with the plurality of valves. Wherein One of a first inner chamber and a first outer chamber is configured to receive process fluid and the other of the first inner chamber and the first outer chamber is configured to receive working fluid, and one of a second inner chamber and a second outer chamber is configured to receive damping fluid and the other of the second inner chamber and the second outer chamber is configured to receive working fluid.