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:
Oct. 24, 1989
Filed:
Feb. 20, 1987
Applicant:
Inventors:
Michel Canaud, Paris, FR;
Philippe Dewitte, Thourotte, FR;
Assignee:
Saint-Gobain Vitrage, Courbevoie, FR;
Primary Examiner:
Int. Cl.
CPC ...
F04B / ; F04B / ;
U.S. Cl.
CPC ...
417259 ; 417489 ;
Abstract
A vane pump in which the ports for passage of highly viscous material pumped are widely dimensioned and the clearances, in particular around the rod which carries the vane, are great. The invention applies to the pumping of materials of the type having a base of butyl rubber and/or polyisobutylene, and in general of materials exhibiting a viscosity greater than 35,000 poises.