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. 15, 2005
Filed:
Apr. 02, 2004
Kazuhisa Kurita, Tokyo, JP;
Kenji Nakao, Tokyo, JP;
Yoshihiko Onishi, Tokyo, JP;
Manabu Miyaki, Tokyo, JP;
Kazuhisa Kurita, Tokyo, JP;
Kenji Nakao, Tokyo, JP;
Yoshihiko Onishi, Tokyo, JP;
Manabu Miyaki, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
In a non-contact type rotation-angle sensing device, a rotation angle sensor () having magnetoresistance elements detects a rotation angle of an object to be measured. The object is rotatable round a rotary shaft () with respect to the rotation angle sensor () and includes a permanent magnet (). The permanent magnet () is disposed symmetrically about said rotary shaft () of said object, and a magnetic element () is disposed on said object between said permanent magnet () and the magnetoresistance elements. In the non-contact type rotation-angle sensing device of above constitution according to the invention, linearity is secured by reducing magnetic hysteresis of the sensor output with respect to the rotation angle, thus a small-sized permanent magnet and reduction in cost being achieved.