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. 26, 2013
Filed:
Apr. 14, 2010
Tomohiro Matsushima, Shimada, JP;
Yasuhiro Sugimori, Shimada, JP;
Tomohiro Matsushima, Shimada, JP;
Yasuhiro Sugimori, Shimada, JP;
Yazaki Corporation, Tokyo, JP;
Abstract
A rotation angle sensor includes a rotation shaft, a yoke which is made from a magnetic permeable material and includes a first disk portion, a second disk portion and a connection portion magnetically connecting the first disk portion and the second disk portion, the first disk portion and the second disk portion being provided on the rotation shaft in an axial direction of the rotation shaft separately, a permanent magnet which is provided between the first disk portion and the second disk portion, and has an annular shape, and a magnetic field detection section which generates an output signal in response to an intensity of a magnetic field formed by the permanent magnet during a rotation of the rotation shaft. A center of the permanent magnet is deviated from a center of the rotation shaft so that a distance between the magnetic field detection section and an outer circumference of the permanent magnet in a direction perpendicular to the axis direction of the rotation shaft is gradually changed in accordance to the rotation of the shaft.