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:
Jan. 08, 2002
Filed:
Jun. 07, 2000
Applicant:
Inventors:
Henri Cholet, Le Pecq, FR;
Eric Vandenbroucke, Nanterre, FR;
Assignee:
Institut Francais du Petrole, Rueil-Malmaison Cedex, FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01C 1/10 ;
U.S. Cl.
CPC ...
F01C 1/10 ;
Abstract
A progressive-cavity pump intended to impart energy to a fluid, includes at least a casing ( ), a stator ( ) and a rotor ( ) arranged in the stator. The casing has at least two parts, a first part ( ) made of a material of low elasticity and a second part ( ) arranged between the inner wall ( ) of the housing and the first part ( ), the second part ( ) being suited to apply and/or to maintain a stress &sgr; exerted by the first part ( ) on the rotor ( ) in order to obtain the pressure gain required for the pumped fluid.