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. 13, 2005
Filed:
Mar. 27, 2002
Ingolf Groening, Lohr am Main, DE;
Thomas Schelbert, Rieneck, DE;
Michael Heider, Frammersbach, DE;
Bernd Schnurr, Lohr am Main, DE;
Ingolf Groening, Lohr am Main, DE;
Thomas Schelbert, Rieneck, DE;
Michael Heider, Frammersbach, DE;
Bernd Schnurr, Lohr am Main, DE;
Rexroth Indramat GmbH, Lohr am Main, DE;
Abstract
The invention relates to a primary part () or secondary part () of an electric motor (), having a core () of a magnetically conductive material, which forms slots () for the windings (), and at least one cooling tube (), through which a coolant fluid () can flow, is inserted into the slots () under the windings (). To assure that a primary part () or secondary part () of this kind is comparatively simple to produce and assemble and has increased cooling performance or increased cooling efficiency compared to the prior art, it is proposed that the effective slot cross section has an at least local retaining constriction () relative to the cooling tube (), so that the cooling tube is fixed by the retaining constriction () in its seat in a receptacle region () of the slot (), and the slot cross section in the receptacle region () has a contour () corresponding to the outer contour () of the cooling tube () in such a way that the cooling tube () has a surface contact () extending substantially over its length with the inner wall () of the receptacle region (), the surface contact being at least local with respect to its outer circumference ().