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. 01, 2011
Filed:
Aug. 18, 2009
Hiroyuki Suzuki, Hitachi, JP;
Takao Imagawa, Mito, JP;
Yuichi Satsu, Hitachi, JP;
Matahiro Komuro, Hitachi, JP;
Takashi Yasuhara, Yotsukaido, JP;
Yutaka Matsunobu, Mito, JP;
Hiroyuki Suzuki, Hitachi, JP;
Takao Imagawa, Mito, JP;
Yuichi Satsu, Hitachi, JP;
Matahiro Komuro, Hitachi, JP;
Takashi Yasuhara, Yotsukaido, JP;
Yutaka Matsunobu, Mito, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A sintered magnet and a rotating machine equipped therewith are disclosed, which include: crystal grains of a ferromagnetic material consisting mainly of iron, and a fluoride compound or an oxyfluoride compound, containing at least one element selected from the group consisting of an alkali metal element, an alkaline earth metal element, and a rare earth element, the fluoride compound or the oxyfluoride compound being formed inside some of the crystal grains or in a part of a grain boundary part. The oxyfluoride compound or the fluoride compound contains carbon, and a grain boundary width of the ferromagnetic material is smaller than a grain boundary width of the ferromagnetic material in which the fluoride compound or the oxyfluoride compound is formed.