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:
Aug. 09, 2005
Filed:
Sep. 17, 2002
Fumihiko Abe, Tokyo, JP;
Kengo Tanaka, Tokyo, JP;
Dongzhi Jin, Tokyo, JP;
Kazuhiko Matsuzaki, Tokyo, JP;
Tsuyoshi Nakamoto, Tokyo, JP;
Masakazu Matsui, Tokyo, JP;
Hideharu Yonehara, Tokyo, JP;
Tomotaka Watanabe, Tokyo, JP;
Kosuke Yamawaki, Tokyo, JP;
Takahiro Ueno, Tokyo, JP;
Fumihiko Abe, Tokyo, JP;
Kengo Tanaka, Tokyo, JP;
Dongzhi Jin, Tokyo, JP;
Kazuhiko Matsuzaki, Tokyo, JP;
Tsuyoshi Nakamoto, Tokyo, JP;
Masakazu Matsui, Tokyo, JP;
Hideharu Yonehara, Tokyo, JP;
Tomotaka Watanabe, Tokyo, JP;
Kosuke Yamawaki, Tokyo, JP;
Takahiro Ueno, Tokyo, JP;
The Furukawa Electric Co., Ltd., Tokyo, JP;
Abstract
A rotation sensor includes a first rotor constituted by a magnetic material and having an outer face that has first conductive layers disposed in two levels as viewed in the direction of a rotation axis and second conductive layers disposed outwardly of and between the first conductive layers, a second rotor having metal members corresponding to the first conductive layers of the first rotor, and a stationary core having a stationary core body that accommodates therein two exciting coils that are spaced from each other in the direction of the rotation axis. The second rotor is disposed between the first rotor mounted to a first shaft and the stationary core fixed to a stationary member, and is mounted to a second shaft which is rotatable relative to the first shaft.