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:
May. 02, 1989
Filed:
May. 27, 1986
Applicant:
Inventors:
Christian Bardin, Bois Colombes, FR;
Pierre Morin, Levallois-Perret, FR;
Assignee:
Institut Francais du Petrole, Rueil-Malmaison, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01F / ; F01B / ;
U.S. Cl.
CPC ...
91165 ; 7386147 ; 7386153 ;
Abstract
A method and device are provided for detecting a fluid flow rate, said device comprising a body in which is formed a passage for the fluid, said passage comprising at least two cross sections of different values, a piston having two faces cooperating with the housing, said piston defining with said housing two zones situated on each side of the two faces of said piston, means for returning said piston to a first position or rest position, each of said zones being substantially at the same pressure as said passage at the level of one of the two cross sections.