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:
Apr. 13, 1993
Filed:
Jul. 11, 1990
Applicant:
Inventors:
Fumitoshi Yamashita, Ikoma, JP;
Masami Wada, Hirakata, JP;
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01F / ;
U.S. Cl.
CPC ...
148101 ; 148103 ; 148104 ; 419 12 ; 419 52 ;
Abstract
A method of manufacturing a permanent magnet which comprises applying one directional pressure and an electric current to an aggregate through a pair of electrodes to cause the aggregate to undergo a plastic deformation thereby to expand an axially projected surface area. The aggregate used is of a type containing alloy flakes interlocked with each other. The alloy flakes are those made of at least one rare earth metal and a ferrous component by the use of a melt quenching process.