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:
Mar. 13, 1990
Filed:
Oct. 17, 1988
Applicant:
Inventors:
Jean-Pierre Jourde, Croissy sur Seine, FR;
Marc Miettaux, Decines, FR;
Assignee:
Regie Nationale des Usines Renault, Boulogne-Billancourt, FR;
Primary Examiner:
Int. Cl.
CPC ...
F04B / ;
U.S. Cl.
CPC ...
417252 ; 417295 ;
Abstract
Variable flow pump comprising at least a piston (1) associated with a chamber (2), said piston (1) cooperating with a surface (3) driven in a constant displacement reciprocating movement, characterized in that the piston (1) is free of any continuous mechanical connection with said surface (3); and wherein said chamber (2) is associated with a flow regulating system (9) placed upstream, and wherein it is equipped with a clack valve (7) on the feed and with a clack valve (8) on the delivery; said regulating system (9) being fed by a booster pump (10).