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:
Nov. 06, 2012
Filed:
Feb. 13, 2007
Takashi Takami, Saitama-ken, JP;
Hiroshi Iwasaki, Saitama-ken, JP;
Yoshinori Kobayashi, Saitama-ken, JP;
Naoki Mochi, Saitama-ken, JP;
Ryuji Gotoh, Gunma-ken, JP;
Takashi Takami, Saitama-ken, JP;
Hiroshi Iwasaki, Saitama-ken, JP;
Yoshinori Kobayashi, Saitama-ken, JP;
Naoki Mochi, Saitama-ken, JP;
Ryuji Gotoh, Gunma-ken, JP;
Hitachi Metals, Ltd., Tokyo, JP;
Abstract
A rotating machine comprising a sintered ferrite magnet having an M-type ferrite structure, comprising Ca, an R element that is at least one of rare earth elements and indispensably includes La, Ba, Fe and Co as indispensable elements, and having a composition represented by the formula: CaRBaFeCo, wherein (1−x−y), x, y, z and n represent the contents of Ca, the R element, Ba and Co, and a molar ratio, meeting 0.3≦1−x−y≦0.65, 0.2≦x≦0.65, 0.001≦y≦0.2, 0.03≦z≦0.65, 4≦n≦7, and 1−x−y>y; a bonded magnet comprising ferrite powder having the above composition and a binder, and a magnet roll, at least one magnetic pole portion of which is made of the above bonded magnet.