Patents by Inventor Fumitaka Miyagawa

Fumitaka Miyagawa 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).

  • Mold for casting and method of surface treatment thereof
    Patent number: 7600556
    Abstract: A method of the surface treatment of a mold for casting, which comprises subjecting a cavity surface of a fixed mold made by the use of a SCM420 material to first shot peening, a sulfurizing-nitriding treatment and second shot peening. The resulting cavity surface of the fixed mold exhibits a high hardness of 700 or higher in terms of Vickers hardness due to the presence of a sulfurized and nitrided layer, and further has a compression residual stress of more than 1200 Mpa and a largest height, which is a surface roughness value defined by JIS standard, of 8 ?m or less.
    Type: Grant
    Filed: October 28, 2003
    Date of Patent: October 13, 2009
    Assignee: Honda Motor Co., Ltd.
    Inventors: Hiroaki Koyama, Yasuhiro Shimamura, Toshihiro Miyauchi, Michiharu Hasegawa, Fumitaka Miyagawa
  • Mold for casting and method of surface treatment thereof
    Publication number: 20060201650
    Abstract: A method of the surface treatment of a mold for casting, which comprises subjecting a cavity surface of a fixed mold made by the use of a SCM420 material to first shot peening, a sulfurizing-nitriding treatment and second shot peening. The resulting cavity surface of the fixed mold exhibits a high hardness of 700 or higher in terms of Vickers hardness due to the presence of a sulfurized and nitrided layer, and further has a compression residual stress of more than 1200 Mpa and a largest height, which is a surface roughness value defined by JIS standard, of 8 ?m or less.
    Type: Application
    Filed: October 28, 2003
    Publication date: September 14, 2006
    Inventors: Hiroaki Koyama, Yasuhiro Shimamura, Toshihiro Miyauchi, Michiharu Hasegawa, Fumitaka Miyagawa