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:
Sep. 14, 1993
Filed:
Dec. 12, 1991
Applicant:
Inventor:
Remy Lefebvre, Radepont-Fleury s/Andelle, FR;
Assignee:
Dosapro Milton Roy, Pont-Saint-Pierre, FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04B / ;
U.S. Cl.
CPC ...
417383 ; 417395 ; 417 63 ; 92 9 / ;
Abstract
In a hydraulically controlled diaphragm pump for high pressures, the diaphragm situated between the hydraulic control chamber and the working chamber is composite and comprises two thin metal diaphragms having between them an intermediate diaphragm that is thick, is made of synthetic material, has high crushing strength, and is in the form of an elastically deformable vault whose concave side faces towards the working chamber.