Patents by Inventor Motoaki Hosako

Motoaki Hosako 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).

  • Sintered rare earth magnet, method of producing the same, and rotating machine
    Patent number: 9177705
    Abstract: A sintered rare earth magnet rotating machine and method improve temperature properties and strength having an excellent corrosion resistance. The sintered rare earth magnet includes at least a main phase composed of R2T14B (R represents at least one rare earth element of Nd, Pr or both and T represents at least one transition metal element including Fe or Fe and Co) compound and a grain boundary phase containing a higher proportion of R than the main phase, wherein the main phase includes a heavy rare earth element (one of Dy, Tb or both), at least part of main phase grains of the main phase included in the sintered rare earth magnet includes at least the following regions, low, high and intermediate concentration regions. These regions exist in order of low, high, and intermediate concentration regions, from low concentration region towards the grain boundary phase in the main phase grains.
    Type: Grant
    Filed: May 25, 2012
    Date of Patent: November 3, 2015
    Assignee: TDK CORPORATION
    Inventors: Tetsuya Hidaka, Kazuo Sato, Kazuya Sakamoto, Shinya Fujito, Motoaki Hosako, Motohisa Murata, Koji Mitake
  • SINTERED RARE EARTH MAGNET, METHOD OF PRODUCING THE SAME, AND ROTATING MACHINE
    Publication number: 20140184370
    Abstract: A sintered rare earth magnet rotating machine and method improve temperature properties and strength having an excellent corrosion resistance. The sintered rare earth magnet includes at least a main phase composed of R2T14B (R represents at least one rare earth element of Nd, Pr or both and T represents at least one transition metal element including Fe or Fe and Co) compound and a grain boundary phase containing a higher proportion of R than the main phase, wherein the main phase includes a heavy rare earth element (one of Dy, Tb or both), at least part of main phase grains of the main phase included in the sintered rare earth magnet includes at least the following regions, low, high and intermediate concentration regions. These regions exist in order of low, high, and intermediate concentration regions, from low concentration region towards the grain boundary phase in the main phase grains.
    Type: Application
    Filed: May 25, 2012
    Publication date: July 3, 2014
    Applicant: TDK CORPORATION
    Inventors: Tetsuya Hidaka, Kazuo Sato, Kazuya Sakamoto, Shinya Fujito, Motoaki Hosako, Motohisa Murata, Koji Mitake