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. 31, 2006
Filed:
Apr. 13, 2005
Dan Mirescu, Caen, FR;
Philippe Raoul, Fresne la Mere, FR;
Dan Mirescu, Caen, FR;
Philippe Raoul, Fresne la Mere, FR;
ArvinMeritor Light Vehicle Systems-France, Sully-sur-Loire, FR;
Abstract
A commutator includes a support ring and a plurality of conducting segments arranged over a circumference of the support ring. Some of the conducting segments have an electrically insulating portion. The commutator is employed with a device that measures rotation of an electric motor rotor shaft. The commutator is fitted onto the electric motor rotor shaft. A commutator housing includes at least three brushes and comes into contact with the conducting segments of the commutator. At least one of the brushes contacts the electrically insulating portions of the commutator segments to provide an electrical measurement that enables the speed, the direction of rotation and the angular position of the electric motor rotor shaft to be determined.