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:
Oct. 05, 1976
Filed:
Aug. 01, 1974
Applicant:
Inventors:
Dieter Kullmann, Langenzenn, DT;
Peter Henninger, Erlangen, DT;
Assignee:
Siemens Aktiengesellschaft, Munich, DT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02K / ;
U.S. Cl.
CPC ...
310219 ; 310178 ;
Abstract
This invention concerns an improvement in a fluid contact arrangement employed in a DC machine. The invention provides a contact fluid which is interposed between the rotor and the stator of the machine. The fluid is ferromagnetic. Further, the invention provides a magnetic field which is directed perpendicular to the air gap. The effect of the magnetic field on the ferromagnetic contact fluid is such that the fluid is retained within the gap both when the rotor is at a standstill and when it operates at its normal speed.