Patents by Inventor Kennichi Murata

Kennichi Murata 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).

  • Heat resisting steel, steam turbine rotor shaft using the steel, steam turbine, and steam turbine power plant
    Patent number: 7540711
    Abstract: The invention provides a heat resisting steel having superior high-temperature strength and notch rupture strength, a rotor shaft using the heat resisting steel, a steam turbine using the rotor shaft, and a power plant using the steam turbine. The heat resisting steel is made of a Cr—Mo—V low-alloy steel containing 0.15-0.40% by weight of C, not more than 0.5% of Si, 0.05-0.50% of Mn, 0.5-1.5% of Ni, 0.8-1.5% of Cr, 0.8-1.8% of Mo and 0.05-0.35% of V, and having a (Ni/Mn) ratio of 3.0-10.0.
    Type: Grant
    Filed: July 5, 2005
    Date of Patent: June 2, 2009
    Assignee: Hitachi, Ltd.
    Inventors: Masahiko Arai, Hirotsugu Kawanaka, Kennichi Murata, Hideo Yoda
  • Heat resisting steel, steam turbine rotor shaft using the steel, steam turbine, and steam turbine power plant
    Publication number: 20060216145
    Abstract: The invention provides a heat resisting steel having superior high-temperature strength and notch rupture strength, a rotor shaft using the heat resisting steel, a steam turbine using the rotor shaft, and a power plant using the steam turbine. The heat resisting steel is made of a Cr—Mo—V low-alloy steel containing 0.15-0.40% by weight of C, not more than 0.5% of Si, 0.05-0.50% of Mn, 0.5-1.5% of Ni, 0.8-1.5% of Cr, 0.8-1.8% of Mo and 0.05-0.35% of V, and having a (Ni/Mn) ratio of 3.0-10.0.
    Type: Application
    Filed: July 5, 2005
    Publication date: September 28, 2006
    Inventors: Masahiko Arai, Hirotsugu Kawanaka, Kennichi Murata, Hideo Yoda