Patents by Inventor Naoyuki UMEZU

Naoyuki UMEZU 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).

  • Method for heat treatment of stainless member, and method for producing forged stainless product
    Patent number: 10370734
    Abstract: A heating step, in which a stainless member is heated to a temperature within or above a heating phase-transformation temperature range (Ar) in which the stainless member is phase-transformed, is executed. A cooling step in which the stainless member heated in the heating step is cooled to a temperature below a cooling phase-transformation temperature range (Mr) in which the stainless member is phase-transformed, is executed. In the cooling step, cooling of the stainless member is suppressed in a control temperature range including the cooling phase-transformation temperature range (Mr).
    Type: Grant
    Filed: September 29, 2014
    Date of Patent: August 6, 2019
    Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Kohei Hatano, Hiroharu Oyama, Yasuo Matsunami, Naoyuki Umezu, Shuhei Kuroki, Hidetaka Haraguchi, Takumi Matsumura, Motonari Machida
  • Turbine blade manufacturing method
    Patent number: 10105752
    Abstract: A method of manufacturing a turbine blade, the method comprising forming a forging by forging stainless steel; heat treating the forging; and cooling the forging after the heat treatment; wherein in the heat treatment and the cooling, a plurality of the forgings are arranged in alignment, and adjacent forgings of the plurality of forgings are disposed so that at least respective portions of portions of the adjacent forgings corresponding to a region from a portion corresponding to a platform of a turbine blade to a center in a longitudinal direction of the turbine blade face each other and warm each other via radiant heat.
    Type: Grant
    Filed: January 27, 2015
    Date of Patent: October 23, 2018
    Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Kohei Hatano, Hiroharu Oyama, Yasuo Matsunami, Naoyuki Umezu, Shuhei Kuroki, Hidetaka Haraguchi, Takumi Matsumura
  • TURBINE BLADE MANUFACTURING METHOD
    Publication number: 20160339507
    Abstract: A method of manufacturing a turbine blade, the method comprising the steps of forming a forging by forging stainless steel; heat treating the forging; and cooling the forging after the heat treatment; wherein in the heat treatment and the cooling, a plurality of the forgings are arranged in alignment, and adjacent forgings of the plurality of forgings are disposed so that at least respective portions of portions of the adjacent forgings corresponding to a region from a portion corresponding to a platform of a turbine blade to a center in a longitudinal direction of the turbine blade face each other and warm each other via radiant heat.
    Type: Application
    Filed: January 27, 2015
    Publication date: November 24, 2016
    Inventors: Kohei HATANO, Hiroharu OYAMA, Yasuo MATSUNAMI, Naoyuki UMEZU, Shuhei KUROKI, Hidetaka HARAGUCHI, Takumi MATSUMURA
  • METHOD FOR HEAT TREATMENT OF STAINLESS MEMBER, AND METHOD FOR PRODUCING FORGED STAINLESS PRODUCT
    Publication number: 20160237517
    Abstract: A heating step, in which a stainless member is heated to a temperature within or above a heating phase-transformation temperature range (Ar) in which the stainless member is phase-transformed, is executed. A cooling step in which the stainless member heated in the heating step is cooled to a temperature below a cooling phase-transformation temperature range (Mr) in which the stainless member is phase-transformed, is executed. In the cooling step, cooling of the stainless member is suppressed in a control temperature range including the cooling phase-transformation temperature range (Mr).
    Type: Application
    Filed: September 29, 2014
    Publication date: August 18, 2016
    Inventors: Kohei HATANO, Hiroharu OYAMA, Yasuo MATSUNAMI, Naoyuki UMEZU, Shuhei KUROKI, Hidetaka HARAGUCHI, Takumi MATSUMURA, Motonari MACHIDA