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:
Dec. 04, 2012
Filed:
Mar. 09, 2009
Masaaki Aoki, Takatsuki, JP;
Tsuyoshi Tsuzaki, Osaka-fu, JP;
Masaaki Aoki, Takatsuki, JP;
Tsuyoshi Tsuzaki, Osaka-fu, JP;
Hitachi Metals, Ltd., Tokyo, JP;
Abstract
There is provided a method of manufacturing a magnetic field generator () that includes a pair of plate yokes (), () which are opposed to each other, with their opposing faces provided with respective permanent magnet assemblies (), () which have faces opposing to each other, to which pole pieces (), () are fixed respectively, and include permanent magnets (). The permanent magnets (), () include R—Fe—B magnets. During manufacturing, the assembled magnetic field generator () is heated in its entirety at a temperature not lower than 40° C. and not higher than 70° C., whereby the R—Fe—B magnets are magnetized to a magnetization rate not smaller than 80% and not greater than 99.9%.