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:
Jun. 20, 1989
Filed:
Jan. 20, 1988
Applicant:
Inventor:
Torgeir Skarstad, Spikkestad, NO;
Assignee:
Kvaerner-Eureka A/S, Tranby, NO;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01D / ;
U.S. Cl.
CPC ...
4151682 ; 415 98 ;
Abstract
The invention relates to a vertical submersible pump assembly comprising a centrifugal pump assembly which comprises a centrifugal pump with a rotor and a pump casing, and a drive motor connected with the pump rotor by a drive shaft. A drain chamber surrounds the drive shaft and is sealed off in the direction of the pump rotor and the drive motor by the aid of respective shaft seals. The invention is characterized by the fact that the centrifugal pump has a dual inlet, that the pump casing forms the bottom of the drain chamber and contains the seals against the pump rotor, and that the drain chamber is shaped with a pocket extending down into the upper casing inlet.