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:
Feb. 23, 2010
Filed:
Jul. 12, 2005
Yasushi Sugiyama, Fujisawa, JP;
Hiroyuki Nikamoto, Fujisawa, JP;
Takashi Ota, Fujisawa, JP;
Junichi Wakabayashi, Takahashi, JP;
Yasushi Sugiyama, Fujisawa, JP;
Hiroyuki Nikamoto, Fujisawa, JP;
Takashi Ota, Fujisawa, JP;
Junichi Wakabayashi, Takahashi, JP;
NOK Corporation, Tokyo, JP;
Abstract
An annular magnetic encoder is provided in which a plurality of S magnetic poles and N magnetic poles are alternately arranged in an arrangement pattern. The arrangement pattern comprises: a plurality of index parts provided in a circumferential direction at fixed intervals; a plurality of standard pitch parts provided between the index parts; and a plurality of specific pitch parts provided in all of the standard pitch parts or in the standard pitch parts other than one standard pitch part, where the specific pitch parts are arranged in different positions within each of the standard pitch parts.