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:
Jul. 11, 2000
Filed:
Aug. 04, 1998
Applicant:
Inventor:
Yvon Castel, Croissy sur Seine, FR;
Assignee:
Institut Francias du Petrole, Cedex, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F04F / ;
U.S. Cl.
CPC ...
417 55 ; 417171 ; 417172 ; 417 76 ;
Abstract
A pumping device providing direct energy exchange between a working fluid and a pumped fluid, comprising at least a first ejector propelling the working fluid in one direction and at least a second ejector propelling working fluid in a second direction. The axial thrust induced by the jet emitted in the first direction compensates at least partly that of a jet emitted in the second direction by another ejector.