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:
Jul. 02, 1991
Filed:
Jun. 05, 1989
Applicant:
Inventors:
Niels D Jensen, Bjerringbro, DK;
Poul E Mikkelstrup, Bjerringbro, DK;
Assignee:
Grundfos International A/S, Bjerringbro, DK;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F04D / ;
U.S. Cl.
CPC ...
4174233 ; 417366 ; 4174237 ; 4174238 ;
Abstract
An immersion pump assembly comprises a pump and a wet-rotor motor driving the pump and having a common hollow spindle for the motor and the pump. Liquid in the wet-rotor compartment of the motor can be introduced into the spindle and conveyed within the spindle into the pump casing in heat exchange relationship with the liquid conveyed by the pump, by way of the wall of the spindle. The liquid is returned from the spindle into the rotor compartment by a pumping action. The exit and return openings for the liquid in the rotor compartment are spaced from each other axially of the pump assembly.