Patents by Inventor Kouji Katsumata

Kouji Katsumata 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).

  • Piston for internal combustion engine
    Patent number: 7398754
    Abstract: A piston for internal combustion engine has both fatigue strength and wear resistance without increased production cost. At least one of a combustion chamber surface, a skirt rib, a pin boss rib which connects a pin boss and a crown, a lower portion of the pin boss casting surface, and a surface layer including the casting surface is a first eutectic structure in which primary crystal Si does not crystallize. A top ring groove and a pin holing of a piston pin are finished surfaces obtained by eliminating the surface layer by means of machining. The layer including the finished surface is a second eutectic structure in which the primary crystal Si crystallizes.
    Type: Grant
    Filed: September 21, 2006
    Date of Patent: July 15, 2008
    Assignee: Honda Motor Co., Ltd.
    Inventors: Akito Tanihata, Naoko Sato, Hisayasu Kojima, Kouji Katsumata, Takashi Shiraishi
  • Piston for internal combustion engine
    Publication number: 20070062479
    Abstract: A piston for internal combustion engine has both fatigue strength and wear resistance without increased production cost. At least one of a combustion chamber surface, a skirt rib, a pin boss rib which connects a pin boss and a crown, a lower portion of the pin boss casting surface, and a surface layer including the casting surface is a first eutectic structure in which primary crystal Si does not crystallize. A top ring groove and a pin holing of a piston pin are finished surfaces obtained by eliminating the surface layer by means of machining. The layer including the finished surface is a second eutectic structure in which the primary crystal Si crystallizes.
    Type: Application
    Filed: September 21, 2006
    Publication date: March 22, 2007
    Inventors: Akito Tanihata, Naoko Sato, Hisayasu Kojima, Kouji Katsumata, Takashi Shiraishi
  • Lighter
    Patent number: D514742
    Type: Grant
    Filed: November 18, 2003
    Date of Patent: February 7, 2006
    Assignee: Tokai Corporation
    Inventor: Kouji Katsumata