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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.:

US 10639720 B1

PDFFull Text
Date of Patent:
May. 05, 2020

Filed:

Aug. 19, 2016

Diffusion treatment device and method for manufacturing r-t-b system sintered magnet using same

Applicant:

Hitachi Metals, Ltd., Minato-ku, Tokyo, JP;

Inventor:

Futoshi Kuniyoshi, Tokyo, JP;

Assignee:

HITACHI METALS, LTD., Tokyo, JP;

Attorneys:

Nixon Peabody LLP

Jeffrey L. Costellia

Primary Examiner:

Xiaowei Su

Int. Cl.
CPC ...
B22F 3/24 (2006.01); F27B 7/34 (2006.01); F27B 7/38 (2006.01); C22C 28/00 (2006.01); C22C 38/00 (2006.01); H01F 41/02 (2006.01); C22C 38/10 (2006.01); C22C 38/32 (2006.01); C22C 19/07 (2006.01); H01F 1/057 (2006.01); H01F 1/08 (2006.01); H01F 1/053 (2006.01); C22C 33/02 (2006.01); F27D 3/12 (2006.01);
U.S. Cl.
CPC ...
B22F 3/24 (2013.01); C22C 19/07 (2013.01); C22C 28/00 (2013.01); C22C 38/00 (2013.01); C22C 38/005 (2013.01); C22C 38/10 (2013.01); C22C 38/32 (2013.01); H01F 1/057 (2013.01); H01F 1/0536 (2013.01); H01F 1/08 (2013.01); H01F 41/02 (2013.01); H01F 41/0293 (2013.01); B22F 2999/00 (2013.01); C22C 33/02 (2013.01); F27D 3/12 (2013.01); H01F 1/0577 (2013.01);
Abstract

A diffusion treatment device includes: a treatment container including a cylindrical main body and first and second lids, the cylindrical main body having a treatment space which is capable of receiving sintered magnet pieces and RH diffusion sources, the first and second lids being capable of hermetically sealing first and second openings, respectively, at opposite ends of the cylindrical main body; a conveyor for conveying the treatment container by a predetermined distance in an x-axis direction while a longitudinal direction of the treatment container is located in a y-axis direction in a rectangular coordinate system xyz; a heating unit including a lower heating section provided under the treatment container and an upper heating section provided above the treatment container, and a first rotating unit for rotating the treatment container around a y-axis while the longitudinal direction of the treatment container is located in the y-axis direction.

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