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:
Sep. 22, 2009
Filed:
Sep. 10, 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
A magnetic encoder includes a multipolar magnet, having magnetic poles formed therein so as to alternate with each other in a direction circumferentially thereof, and a core metal supporting the multipolar magnet. The multipolar magnet is prepared from a sintered element formed by sintering a powdery mixture of a magnetic powder and a non-magnetic metallic powder. This multipolar magnet is fixed to the core metal to form a unitary component made up of the sintered element and the core metal. The unitary component is subjected to a surface treatment for anticorrosion.