Patents by Inventor Hiroki KITADA

Hiroki KITADA 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).

  • Gas turbine rotor blade and gas turbine
    Patent number: 11939881
    Abstract: A platform of a gas turbine rotor blade according to one embodiment includes a groove portion recessed from an end surface on a trailing edge side toward a leading edge side. A bottom portion of the groove portion overlaps at least a blade-shaped portion when viewed from a radial direction.
    Type: Grant
    Filed: March 23, 2023
    Date of Patent: March 26, 2024
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Ryo Murata, Yuji Komagome, Naoya Tatsumi, Hiroki Kitada, Shunsuke Torii
  • Turbine rotor blade and gas turbine
    Patent number: 11939882
    Abstract: A turbine rotor blade includes a leading edge portion having a plurality of cooling holes. The plurality of cooling holes includes: m cooling holes arranged in a first range in the blade height direction, where m is an integer of 2 or more; and n cooling holes arranged in a second range on the blade tip side of the first range in the blade height direction, where n is an integer of 2 or more, and n/b<m/a is satisfied, where a is the dimension of the first range in the blade height direction, and b is the dimension of the second range in the blade height direction.
    Type: Grant
    Filed: November 12, 2019
    Date of Patent: March 26, 2024
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Hiroki Kitada, Hiroyuki Otomo
  • GAS TURBINE ROTOR BLADE AND GAS TURBINE
    Publication number: 20230392505
    Abstract: A platform of a gas turbine rotor blade according to one embodiment includes a groove portion recessed from an end surface on a trailing edge side toward a leading edge side. A bottom portion of the groove portion overlaps at least a blade-shaped portion when viewed from a radial direction.
    Type: Application
    Filed: March 23, 2023
    Publication date: December 7, 2023
    Inventors: Ryo MURATA, Yuji KOMAGOME, Naoya TATSUMI, Hiroki KITADA, Shunsuke TORII
  • Turbine rotor blade, turbine, and tip clearance measurement method
    Patent number: 11499430
    Abstract: A turbine rotor blade includes: a root portion fixed to a rotor shaft; and an airfoil portion including a pressure surface, a suction surface, and a top surface connecting the pressure surface and the suction surface, with a cooling passage formed inside the airfoil portion. The top surface of the turbine rotor blade includes a leading edge region located on the leading edge side and formed parallel to the rotor shaft, and a trailing edge region adjacent to the leading edge region. The trailing edge region has an inclined surface inclined radially inward toward a trailing edge.
    Type: Grant
    Filed: November 20, 2019
    Date of Patent: November 15, 2022
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Hiroki Kitada, Satoshi Hada, Hiroyuki Otomo, Yasumasa Kunisada
  • TURBINE ROTOR BLADE AND GAS TURBINE
    Publication number: 20220220856
    Abstract: A turbine rotor blade includes a leading edge portion having a plurality of cooling holes. The plurality of cooling holes includes: m cooling holes arranged in a first range in the blade height direction, where m is an integer of 2 or more; and n cooling holes arranged in a second range on the blade tip side of the first range in the blade height direction, where n is an integer of 2 or more, and n/b<m/a is satisfied, where a is the dimension of the first range in the blade height direction, and b is the dimension of the second range in the blade height direction.
    Type: Application
    Filed: November 12, 2019
    Publication date: July 14, 2022
    Inventors: Hiroki KITADA, Hiroyuki OTOMO
  • TURBINE ROTOR BLADE, TURBINE, AND TIP CLEARANCE MEASUREMENT METHOD
    Publication number: 20210340877
    Abstract: A turbine rotor blade includes: a root portion fixed to a rotor shaft; and an airfoil portion including a pressure surface, a suction surface, and a top surface connecting the pressure surface and the suction surface, with a cooling passage formed inside the airfoil portion. The top surface of the turbine rotor blade includes a leading edge region located on the leading edge side and formed parallel to the rotor shaft, and a trailing edge region adjacent to the leading edge region. The trailing edge region has an inclined surface inclined radially inward toward a trailing edge.
    Type: Application
    Filed: November 20, 2019
    Publication date: November 4, 2021
    Inventors: Hiroki KITADA, Satoshi HADA, Hiroyuki OTOMO, Yasumasa KUNISADA