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:
May. 20, 2008
Filed:
Feb. 19, 2004
Tatsuo Nakajima, Iwata, JP;
Kouya Oohira, Iwata, JP;
Arito Matsui, Iwata, JP;
Kazutoyo Murakami, Iwata, JP;
Tatsuo Nakajima, Iwata, JP;
Kouya Oohira, Iwata, JP;
Arito Matsui, Iwata, JP;
Kazutoyo Murakami, Iwata, JP;
NTN Corporation, Osaka, JP;
Abstract
To provide a magnetic encoder which can be assembled having a thin-walled structure while securing an excellent detection sensitivity and which can provide an excellent moldability by suitably selecting materials, the magnetic encoder is provided which includes a multi-pole magnethaving a plurality of opposite magnetic poles alternating in a direction circumferentially thereof, and a core metalfor supporting the multi-pole magnet. The multi-pole magnetcontains a powdery magnetic material mixed in an amount within the range of 20 to 90 vol. % relative to the total volume of the multi-pole magnet. The multi-pole magnetmay be a sintered magnet.