Patents by Inventor Kunitoshi Kanno

Kunitoshi Kanno 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).

  • Powder compacting apparatus and method of producing a rare-earth magnet using the same
    Patent number: 6969244
    Abstract: The present invention aims to prevent heating and ignition of a material powder of a rare-earth alloy while reducing the oxygen content thereof so as to improve the magnetic properties of the rare-earth magnet. A rare-earth alloy powder is compacted by using a powder compacting apparatus including: an airtight container capable of storing a rare-earth alloy powder therein; an airtight feeder box moved between a powder-filling position and a retracted position; and an airtight powder supply device capable of supplying the rare-earth alloy powder from the container into the feeder box without exposing the rare-earth alloy powder to the atmospheric air.
    Type: Grant
    Filed: August 15, 2002
    Date of Patent: November 29, 2005
    Assignee: Neomax Co., Ltd.
    Inventors: Futoshi Kuniyoshi, Koki Tokuhara, Kunitoshi Kanno, Hitoshi Morimoto, Tomoiku Ohtani, Ryoji Ono
  • Method for producing rare-earth magnet
    Patent number: 6696015
    Abstract: The method for producing a rare-earth sintered magnet of the present invention includes the steps of: compacting alloy powder for the rare-earth sintered magnet to form a green compact; loading the green compact into a case having a structure restricting a path through which gas flows between the outside and inside of the case, and placing a gas absorbent at least near the path; and sintering the green compact by heating the case including the green compact inside in a decompressed atmosphere.
    Type: Grant
    Filed: May 2, 2001
    Date of Patent: February 24, 2004
    Assignee: Sumitomo Special Metals Co., Ltd.
    Inventors: Koki Tokuhara, Akiyasu Oota, Tsuyoshi Wada, Katsumi Okayama, Tomoiku Ohtani, Kunitoshi Kanno
  • Powder compacting apparatus and method of producing a rare-earth magnet using the same
    Patent number: 6511631
    Abstract: The present invention aims to prevent heating and ignition of a material powder of a rare-earth alloy while reducing the oxygen content thereof so as to improve the magnetic properties of the rare-earth magnet. A rare-earth alloy powder is compacted by using a powder compacting apparatus including: an airtight container capable of storing a rare-earth alloy powder therein; an airtight feeder box moved between a powder-filling position and a retracted position; and an airtight powder supply device capable of supplying the rare-earth alloy powder from the container into the feeder box without exposing the rare-earth alloy powder to the atmospheric air.
    Type: Grant
    Filed: April 20, 2001
    Date of Patent: January 28, 2003
    Assignee: Sumitomo Special Metals Co., Ltd.
    Inventors: Futoshi Kuniyoshi, Koki Tokuhara, Kunitoshi Kanno, Hitoshi Morimoto, Tomoiku Ohtani, Ryoji Ono
  • Powder compacting apparatus and method of producing a rare-earth magnet using the same
    Publication number: 20020185792
    Abstract: The present invention aims to prevent heating and ignition of a material powder of a rare-earth alloy while reducing the oxygen content thereof so as to improve the magnetic properties of the rare-earth magnet. A rare-earth alloy powder is compacted by using a powder compacting apparatus including: an airtight container capable of storing a rare-earth alloy powder therein; an airtight feeder box moved between a powder-filling position and a retracted position; and an airtight powder supply device capable of supplying the rare-earth alloy powder from the container into the feeder box without exposing the rare-earth alloy powder to the atmospheric air.
    Type: Application
    Filed: August 15, 2002
    Publication date: December 12, 2002
    Applicant: SUMITOMO SPECIAL METALS CO., LTD.
    Inventors: Futoshi Kuniyoshi, Koki Tokuhara, Kunitoshi Kanno, Hitoshi Morimoto, Tomoiku Ohtani, Ryoji Ono
  • Method for producing rare-earth magnet
    Publication number: 20020012600
    Abstract: The method for producing a rare-earth sintered magnet of the present invention includes the steps of: compacting alloy powder for the rare-earth sintered magnet to form a green compact; loading the green compact into a case having a structure restricting a path through which gas flows between the outside and inside of the case, and placing a gas absorbent at least near the path; and sintering the green compact by heating the case including the green compact inside in a decompressed atmosphere.
    Type: Application
    Filed: May 2, 2001
    Publication date: January 31, 2002
    Inventors: Koki Tokuhara, Akiyasu Oota, Tsuyoshi Wada, Katsumi Okayama, Tomoiku Ohtani, Kunitoshi Kanno
  • Powder compacting apapratus and method of producing a rare-earth magnet using the same
    Publication number: 20020001534
    Abstract: The present invention aims to prevent heating and ignition of a material powder of a rare-earth alloy while reducing the oxygen content thereof so as to improve the magnetic properties of the rare-earth magnet. A rare-earth alloy powder is compacted by using a powder compacting apparatus including: an airtight container capable of storing a rare-earth alloy powder therein; an airtight feeder box moved between a powder-filling position and a retracted position; and an airtight powder supply device capable of supplying the rare-earth alloy powder from the container into the feeder box without exposing the rare-earth alloy powder to the atmospheric air.
    Type: Application
    Filed: April 20, 2001
    Publication date: January 3, 2002
    Inventors: Futoshi Kuniyoshi, Koki Tokuhara, Kunitoshi Kanno, Hitoshi Morimoto, Tomoiku Ohtani, Ryoji Ono