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:
Jun. 17, 2003
Filed:
Apr. 01, 2002
Applicant:
Inventors:
Satoshi Takemoto, Ichinomiya, JP;
Takanobu Saito, Okazaki, JP;
Assignee:
Daido Tokushuko Kabushiki Kaisha, Aichi, JP;
Primary Examiner:
Int. Cl.
CPC ...
H01F 1/22 ; H01F 1/28 ;
U.S. Cl.
CPC ...
H01F 1/22 ; H01F 1/28 ;
Abstract
A powder magnetic core mainly comprises a soft magnetic powder which contains: 0.5 to 15% by mass of Si; 10% by mass or less of Al; and the balance of Fe and unavoidable impurities. The powder has an apparent density/true density falling within in a range of 0.4 to 0.55, and a volume percentage of the soft magnetic powder is 80% by volume or more. An initial permeability of the core at 100 kHz is 125 or more.