Patents by Inventor Kimmitsu Maruyama

Kimmitsu Maruyama 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).

  • Turbine rotor and manufacturing method of turbine rotor
    Patent number: 9109449
    Abstract: A turbine rotor has suitable strength and toughness without causing soaring manufacturing costs and prolonged manufacturing time. The turbine rotor is constructed by welding a rotor member for high temperature made of high Cr steel to a rotor member for low temperature made of low Cr steel. The high temperature rotor member is formed from high Cr steel of which the nitrogen content is 0.02% or higher by mass %. A filler material welds the high temperature rotor member and the low temperature rotor member together, and is a 9% Cr-based filler material of which the nitrogen content is 0.025% or lower by mass %.
    Type: Grant
    Filed: July 15, 2009
    Date of Patent: August 18, 2015
    Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Takashi Shige, Shin Nishimoto, Kimmitsu Maruyama, Kenji Kawasaki, Yoshiaki Fukunaga, Takashi Nakano
  • TURBINE ROTOR AND MANUFACTURING METHOD OF TURBINE ROTOR
    Publication number: 20110206525
    Abstract: There are provided a turbine rotor having suitable strength and toughness without causing soaring manufacturing costs and prolonged manufacturing time, and a manufacturing method of the turbine rotor. In a turbine rotor constructed by welding a rotor member for high temperature made of high Cr steel, and a rotor member for low temperature made of low Cr steel, the high temperature rotor member is formed from high Cr steel of which the nitrogen content is 0.02% or higher by mass %, and a filler material which welds the high temperature rotor member and the low temperature rotor member together is a 9% Cr-based filler material of which the nitrogen content is 0.025% or lower by mass %.
    Type: Application
    Filed: July 15, 2009
    Publication date: August 25, 2011
    Inventors: Takashi Shige, Shin Nishimoto, Kimmitsu Maruyama, Kenji Kawasaki, Yoshiaki Fukunaga, Takashi Nakano