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:
Mar. 07, 1995
Filed:
Sep. 09, 1993
Applicant:
Inventors:
Gerard Surmely, Yverdon, CH;
Daho Taghezout, Lausanne, CH;
Assignee:
Eta SA Fabriques d'Ebauches, Granges, CH;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02K / ; H02K / ;
U.S. Cl.
CPC ...
310254 ; 310156 ; 310179 ; 310184 ;
Abstract
The present invention concerns a polyphase electromagnetic transducer, the rotor (4) of which has a multipolar permanent magnet (10) including an even number of magnetic pole pairs (14) oriented along the direction of the rotation axis of such motor (4). First and second principal stator parts (22 and 24) extend respectively from either side of a rotor plane defined by the multipolar permanent magnet (10). The first principal stator part (22) defines at least three principal magnetic poles (30, 31 and 32) and secondary magnetic poles (38), these latter being defined by teeth (40) superposed onto the multipolar permanent magnet (10).