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:
Sep. 20, 2005
Filed:
Mar. 30, 2004
Tomoaki Toratani, Tokyo, JP;
Toshiro Yamamoto, Tokyo, JP;
Hiroshi Morimoto, Tokyo, JP;
Kyutaro Abe, Tokyo, JP;
Masahiro Hasegawa, Tokyo, JP;
Akira Noguchi, Tokyo, JP;
Kosuke Yamawaki, Tokyo, JP;
Tomoaki Toratani, Tokyo, JP;
Toshiro Yamamoto, Tokyo, JP;
Hiroshi Morimoto, Tokyo, JP;
Kyutaro Abe, Tokyo, JP;
Masahiro Hasegawa, Tokyo, JP;
Akira Noguchi, Tokyo, JP;
Kosuke Yamawaki, Tokyo, JP;
The Furukawa Electric Co., Ltd., Tokyo, JP;
Abstract
A rotation sensor functioning as both a rotation-angle sensor and a torque sensor is provided which, when applied to a steering sensor for an automobile, for example, permits reduction in the number of components and thus in the weight of the automobile and contributes to conservation of global environment. The rotation sensor has slip rings covered with conductive synthetic resin having small coefficient of friction, allowing the contact pressure of brushes disposed in sliding contact with the slip rings to be kept low and the life duration of the slip rings to be prolonged. Further, no metal powder is produced when the brushes slide on the respective slip rings, and it is therefore possible to prevent the formation of unwanted insulating film.