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:
Aug. 31, 2004
Filed:
Aug. 20, 2002
Applicant:
Inventors:
Divonsir Lopes, Rio de Janeiro, BR;
Elisio Caetano Filho, Rio de Janeiro, BR;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04B 4/900 ; F04B 2/500 ; F04B 2/304 ;
U.S. Cl.
CPC ...
F04B 4/900 ; F04B 2/500 ; F04B 2/304 ;
Abstract
A pump system for multi-phase fluids that includes a drive-shaft ( ), mechanical differential units ( , D . . . D ) and pumps ( , B . . . B ) where the differential units allow for the changing of pump rotation speeds between pumps( , B . . . B ) so as to adjust the compressibility of fluids in order to reduce or eliminate circulatory flow. There is also a description of the method of operating the system according to the invention.