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:
Jan. 12, 2010
Filed:
Oct. 10, 2006
Nobuhiko Fujimori, Saitama-ken, JP;
Kazuhiro Sonoda, Saitama-ken, JP;
Takashi Tsukada, Saitama-ken, JP;
Junji Matsushima, Saitama-ken, JP;
Yasushi Kimura, Saitama-ken, JP;
Satoru Kikuchi, Saitama-ken, JP;
Nobuhiko Fujimori, Saitama-ken, JP;
Kazuhiro Sonoda, Saitama-ken, JP;
Takashi Tsukada, Saitama-ken, JP;
Junji Matsushima, Saitama-ken, JP;
Yasushi Kimura, Saitama-ken, JP;
Satoru Kikuchi, Saitama-ken, JP;
Hitachi Metals, Ltd., Tokyo, JP;
Abstract
A sintered permanent magnet having a composition comprising, by mass, 27-33.5% of R, which is at least one of rare earth elements including Y, 0.5-2% of B, 0.002-0.15% of N, 0.25% or less of O, 0.15% or less of C, and 0.001-0.05% of P, the balance being Fe, wherein it is in the shape of a ring having an outer diameter of 10-100 mm, an inner diameter of 8-96 mm, and a height of 10-70 mm, with a plurality of magnetic poles axially extending on an outer circumferential surface. The distribution of a surface magnetic flux density Bon magnetic poles in an axial direction of the ring magnet is in a range of 92.5% or more of the maximum of B.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile