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:
Mar. 28, 2006
Filed:
Nov. 18, 2002
Applicants:
Hideaki Ono, Kanagawa-ken, JP;
Tetsurou Tayu, Kanagawa-ken, JP;
Munekatsu Shimada, Tokyo, JP;
Makoto Kano, Kanagawa-ken, JP;
Inventors:
Hideaki Ono, Kanagawa-ken, JP;
Tetsurou Tayu, Kanagawa-ken, JP;
Munekatsu Shimada, Tokyo, JP;
Makoto Kano, Kanagawa-ken, JP;
Assignee:
Nissan Motor Co., Ltd., Kanagawa-Ken, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01F 1/057 (2006.01);
U.S. Cl.
CPC ...
Abstract
An exchange-spring magnet is prepared using a magnet alloy containing Ta and C in addition to Nd, Fe and B. This exchange-spring magnet uses the magnet alloy prepared by a liquid quenching method or a mechanical alloying method. Further, by subjecting the magnetic alloy having a part set in an amorphous state to heat treatment, an exchange-spring magnet exhibits good properties regarding magnetic flux density and coercive force.