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:
Dec. 04, 1979
Filed:
Jan. 04, 1978
Applicant:
Inventor:
Jacques R Granet, Laval, FR;
Assignee:
Le Material Telephonique, Boulogne-Billancourt, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F04B / ; F04B / ;
U.S. Cl.
CPC ...
417338 ; 417426 ; 417428 ;
Abstract
A symmetrical, twin centrifugal pump includes a pair of valves mounted about a common shaft. The valves are capable of independent operation thus allowing either or both of the pump elements to operate. A key is also mounted to the shaft to allow overall regulation of the pump by selectively impeding the flow of liquid from the pump inlet to pump outlet.