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. 16, 1997
Filed:
Nov. 02, 1995
Applicant:
Inventors:
Assignee:
Grundl und Hoffmann GmbH Gesellschaft fur elektrotechnishe, Entiwicklungen, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02K / ;
U.S. Cl.
CPC ...
310 52 ; 310 51 ; 310 53 ; 310 54 ; 475161 ; 180 / ; 180 655 ;
Abstract
A brushless electric motor has a fluid-tight housing, an internal rotor which is connected to an output shaft, stator plates which are disposed at a radial spacing from the rotor, a coolant delivery line leading into the interior of the housing, and a coolant discharge line leading out of the housing. A control arrangement, which as a function of the rotational speed and torque adjusts the volume flow of the coolant flowing through the interior of the housing, is provided to keep the efficiency of the arrangement as a whole high and to provide an electric motor having high power density.