Patents by Inventor Yasukuni Mochimizo

Yasukuni Mochimizo 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 core and iron-base powder for powder core
    Patent number: 8236087
    Abstract: The present invention relates to an iron-base powder for a powder core, wherein when cross-sections of at least 50 iron-base powders are observed and a crystal grain size distribution containing at least a maximum crystal grain size is determined by measuring a crystal grain size of each iron-base powder, 70% or more of the measured crystal grains are a crystal grain having a crystal grain size of 50 ?m or more. According to the iron-base powder of the invention, a coercivity of the powder core can be made small and a hysteresis loss can be reduced.
    Type: Grant
    Filed: September 11, 2007
    Date of Patent: August 7, 2012
    Assignees: Kobe Steel, Ltd., Hitachi Powdered Metals Co., Ltd.
    Inventors: Hiroyuki Mitani, Nobuaki Akagi, Hirofumi Houjou, Chio Ishihara, Makoto Iwakiri, Sohei Yamada, Yasukuni Mochimizo
  • POWDER CORE AND IRON-BASE POWDER FOR POWDER CORE
    Publication number: 20090226751
    Abstract: The present invention relates to an iron-base powder for a powder core, wherein when cross-sections of at least 50 iron-base powders are observed and a crystal grain size distribution containing at least a maximum crystal grain size is determined by measuring a crystal grain size of each iron-base powder, 70% or more of the measured crystal grains are a crystal grain having a crystal grain size of 50 ?m or more. According to the iron-base powder of the invention, a coercivity of the powder core can be made small and a hysteresis loss can be reduced.
    Type: Application
    Filed: September 11, 2007
    Publication date: September 10, 2009
    Applicants: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel Ltd.), Hitachi Powdered Metals Co., Ltd.
    Inventors: Hiroyuki Mitani, Nobuaki Akagi, Hirofumi Houjou, Chio Ishihara, Makoto Iwakiri, Sohei Yamada, Yasukuni Mochimizo