Patents by Inventor Tomoiku Otani

Tomoiku Otani has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method and machine of making rare-earth alloy granulated powder and method of making rare-earth alloy sintered body
    Patent number: 7931756
    Abstract: A method of making a rare-earth alloy granulated powder according to the present invention includes the steps of: preparing a rare-earth alloy powder; generating remnant magnetization in the powder; and granulating the powder by utilizing agglomeration force produced by the remnant magnetization of the powder. Since the agglomeration force produced by the remnant magnetization is utilized, the addition of a granulating agent may be omitted.
    Type: Grant
    Filed: October 5, 2009
    Date of Patent: April 26, 2011
    Assignee: Hitachi Metals, Ltd.
    Inventors: Futoshi Kuniyoshi, Tomoiku Otani
  • METHOD AND MACHINE OF MAKING RARE-EARTH ALLOY GRANULATED POWDER AND METHOD OF MAKING RARE-EARTH ALLOY SINTERED BODY
    Publication number: 20100021335
    Abstract: A method of making a rare-earth alloy granulated powder according to the present invention includes the steps of: preparing a rare-earth alloy powder; generating remnant magnetization in the powder; and granulating the powder by utilizing agglomeration force produced by the remnant magnetization of the powder. Since the agglomeration force produced by the remnant magnetization is utilized, the addition of a granulating agent may be omitted.
    Type: Application
    Filed: October 5, 2009
    Publication date: January 28, 2010
    Applicant: HITACHI METALS, LTD.
    Inventors: Futoshi KUNIYOSHI, Tomoiku OTANI
  • Method and apparatus for producing granulated powder of rare earth alloy and method for producing rare earth alloy sintered compact
    Patent number: 7622010
    Abstract: A method of making a rare-earth alloy granulated powder according to the present invention includes the steps of: preparing a rare-earth alloy powder; generating remanent magnetization in the powder; and granulating the powder by utilizing agglomeration force produced by the remanent magnetization of the powder. Since the agglomeration force produced by the remanent magnetization is utilized, the addition of a granulating agent may be omitted.
    Type: Grant
    Filed: November 27, 2002
    Date of Patent: November 24, 2009
    Assignee: Hitachi Metals, Ltd.
    Inventors: Futoshi Kuniyoshi, Tomoiku Otani
  • Corrosion-resistant rare earth metal-based permanent magnet
    Publication number: 20080124567
    Abstract: The objectives of the present invention are to provide a stable and simple method for producing a rare earth metal-based permanent magnet having on the surface thereof a corrosion-resistant film containing fine zinc particles dispersed therein, a corrosion-resistant rare earth metal-based permanent magnet produced by the method, a dip spin coating method being suitable for forming a coating film on thin type work pieces having various shapes, and a method for forming a coating film on a work piece.
    Type: Application
    Filed: December 27, 2007
    Publication date: May 29, 2008
    Applicant: NEOMAX CO., LTD.
    Inventors: Kohshi Yoshimura, Tomoiku Otani
  • Method for producing corrosion-resistant rare earth metal-based permanent magnet
    Patent number: 7335392
    Abstract: The objectives of the present invention are to provide a stable and simple method for producing a rare earth metal-based permanent magnet having on the surface thereof a corrosion-resistant film containing fine zinc particles dispersed therein, a corrosion-resistant rare earth metal-based permanent magnet produced by the method, a dip spin coating method being suitable for forming a coating film on thin type work pieces having various shapes, and a method for forming a coating film on a work piece.
    Type: Grant
    Filed: November 28, 2003
    Date of Patent: February 26, 2008
    Assignee: Neomax Co., Ltd.
    Inventors: Kohshi Yoshimura, Tomoiku Otani
  • Method for producing corrosion-resistant rare earth based permanent magnet, corrosion-resistant rare earth based permanent magnet, dip spin coating method for work piece, and method for forming coating film on work piece
    Publication number: 20050233068
    Abstract: The objectives of the present invention are to provide a stable and simple method for producing a rare earth metal-based permanent magnet having on the surface thereof a corrosion-resistant film containing fine zinc particles dispersed therein, a corrosion-resistant rare earth metal-based permanent magnet produced by the method, a dip spin coating method being suitable for forming a coating film on thin type work pieces having various shapes, and a method for forming a coating film on a work piece.
    Type: Application
    Filed: November 28, 2003
    Publication date: October 20, 2005
    Inventors: Kohshi Yoshimura, Tomoiku Otani
  • Method and apparatus for producing granulated powder of rare earth alloy and method for producing rare earth alloy sintered compact
    Publication number: 20050006005
    Abstract: A method of making a rare-earth alloy granulated powder according to the present invention includes the steps of: preparing a rare-earth alloy powder; generating remanent magnetization in the powder; and granulating the powder by utilizing agglomeration force produced by the remanent magnetization of the powder. Since the agglomeration force produced by the remanent magnetization is utilized, the addition of a granulating agent may be omitted.
    Type: Application
    Filed: November 27, 2002
    Publication date: January 13, 2005
    Inventors: Futoshi Kuniyoshi, Tomoiku Otani