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:
Nov. 19, 1985
Filed:
Jun. 01, 1983
Applicant:
Inventors:
Michel Galais, Angouleme, FR;
Christian Sardain, Delle, FR;
Jean Fouin, Angouleme, FR;
Marcel Arnaudeau, Paris, FR;
Pierre Morin, Levallois-Perret, FR;
Assignee:
Moteurs Leroy-Somer, Angouleme Cedex, FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04B / ;
U.S. Cl.
CPC ...
417369 ; 417372 ; 415111 ; 415176 ;
Abstract
A motor pump set having two coaxial shafts is provided with a fluid circuit for protecting the rotary packing-gland against any ingress of solid particles such as sand. Pumped fluid is withdrawn from an intermediate space of the pump and returned upstream via a duct within the pump shaft in order to lubricate the bearings as it passes. The fraction of the fluid stream which is discharged from the last bearing flows in the vicinity of the packing-gland and is driven through radial discharge ducts under the action of centrifugal force.