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. 25, 2011
Filed:
Jul. 30, 2008
Yoshinori Hayashi, Hamamatsu, JP;
Yoshinori Hayashi, Hamamatsu, JP;
Yamaha Corporation, Hamamatsu-shi, JP;
Abstract
In a position detecting apparatus, a magnetic scale part has a magnetic pattern formed by magnetization along a longitudinal direction. An increased magnetization part is arranged at an end portion of the magnetic scale part in the longitudinal direction. The increased magnetization part is magnetized with an increased intensity of magnetization as compared to the magnetic scale part. A magnetic field shaping part is disposed adjacent to the magnetic scale part for shaping a magnetic field generated from the magnetic scale part. A magnetic detection part detects both the magnetic field from the magnetic pattern of the magnetic scale part and the magnetic field from the increased magnetization part. The magnetic detection part is arranged in opposed relation to the magnetic scale part movably in the longitudinal direction of the magnetic scale part. The magnetic pattern and the increased magnetization part are arranged along a track through which the magnetic detection part moves.