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:
Nov. 23, 2004
Filed:
Apr. 25, 2003
Applicant:
Inventors:
Erich Lunz, Lonnerstadt, DE;
Frank Dürschmied, Nümberg, DE;
Assignee:
Ina Wälzlager Schaeffler oHG, Herzogenaurach, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02K 4/100 ;
U.S. Cl.
CPC ...
H02K 4/100 ;
Abstract
A linear motor includes a secondary part ( ) having several permanent magnets ( ) disposed behind one another with alternating orientation of the polarity, or excitation windings. These permanent magnets ( ) or excitation windings are wound helically around a rotation axis. Furthermore, there is provided a primary part ( ) having a current-carrying winding disposed in parallel relationship to the permanent magnets ( ) or excitation windings and arranged about the rotation axis such that a magnetic traveling field travels helically about the rotation axis.