Patents by Inventor Nobuyuki Izutsu

Nobuyuki Izutsu 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).

  • Combustor nozzle, gas turbine combustor, gas turbine, cover ring, and combustor nozzle manufacturing method
    Patent number: 10837642
    Abstract: Provided are a combustor nozzle, a gas turbine combustor, a gas turbine, a cover ring, and a combustor nozzle manufacturing method. The combustor nozzle includes: a nozzle body provided with a fuel flow passage; a cover ring that is disposed on an outer side of the nozzle body so as to form air flow passages that allow air to jet out toward a front side; and fuel injection nozzles that are provided in a leading end part of the nozzle body at predetermined intervals in a circumferential direction and extend through the cover ring so as to be able to inject fuel from the fuel flow passage toward the front side.
    Type: Grant
    Filed: June 8, 2016
    Date of Patent: November 17, 2020
    Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Masaki Mitani, Koshiro Fukumoto, Toshihiko Saito, Mitsunori Isono, Dai Morishige, Nobuyuki Izutsu, Hiroyuki Yamasaki, Yoshiyuki Wada
  • COMBUSTOR NOZZLE, GAS TURBINE COMBUSTOR, GAS TURBINE, COVER RING, AND COMBUSTOR NOZZLE MANUFACTURING METHOD
    Publication number: 20180187891
    Abstract: Provided are a combustor nozzle, a gas turbine combustor, a gas turbine, a cover ring, and a combustor nozzle manufacturing method. The combustor nozzle includes: a nozzle body provided with a fuel flow passage; a cover ring that is disposed on an outer side of the nozzle body so as to form air flow passages that allow air to jet out toward a front side; and fuel injection nozzles that are provided in a leading end part of the nozzle body at predetermined intervals in a circumferential direction and extend through the cover ring so as to be able to inject fuel from the fuel flow passage toward the front side.
    Type: Application
    Filed: June 8, 2016
    Publication date: July 5, 2018
    Inventors: Masaki MITANI, Koshiro FUKUMOTO, Toshihiko SAITO, Mitsunori ISONO, Dai MORISHIGE, Nobuyuki IZUTSU, Hiroyuki YAMASAKI, Yoshiyuki WADA
  • Bolt and manufacturing method of bolt
    Patent number: 8607604
    Abstract: A bolt has a male screw with a surface hardening portion that has an increased surface hardness and that is applied with a compressive residual stress. The male screw is formed by cutting the bolt, and performing a process to provide at least on the surface of the male screw of the bolt the surface hardening portion that has increased hardness and that is applied with a compressive residual stress. As a result, the fatigue resistance of the male screw is improved and the bolt is effective for use in a portion where the male screw is subject to a repetitive stress.
    Type: Grant
    Filed: July 8, 2011
    Date of Patent: December 17, 2013
    Assignee: Mitsubishi Heavy Industries
    Inventors: Norikazu Tezuka, Kazuharu Hirokawa, Keisuke Ihara, Kei Osawa, Hiroshi Ishikawa, Taiji Torigoe, Ryuichi Yamamoto, Yukihiro Hashimoto, Nobuyuki Izutsu, Koji Takahashi
  • BOLT AND MANUFACTURING METHOD OF BOLT
    Publication number: 20110268533
    Abstract: A bolt has a male screw with a surface hardening portion that has an increased surface hardness and that is applied with a compressive residual stress. The male screw is formed by cutting the bolt, and performing a process to provide at least on the surface of the male screw of the bolt the surface hardening portion that has increased hardness and that is applied with a compressive residual stress. As a result, the fatigue resistance of the male screw is improved and the bolt is effective for use in a portion where the male screw is subject to a repetitive stress.
    Type: Application
    Filed: July 8, 2011
    Publication date: November 3, 2011
    Inventors: Norikazu TEZUKA, Kazuharu Hirokawa, Keisuke Ihara, Kei Osawa, Hiroshi Ishikawa, Taiji Torigoe, Ryuichi Yamamoto, Yukihiro Hashimoto, Nobuyuki Izutsu, Koji Takahashi
  • Bolt and Manufacturing Method of Bolt
    Publication number: 20090003968
    Abstract: The present invention provides a surface hardening portion 11 that has increased surface hardness and that is applied with a compressive residual stress, at least on the surface of a male screw 10 of a bolt 1. The present invention includes the steps of cutting to form the male screw 10 of the bolt 1, and processing to provide at least on the surface of the male screw 10 of the bolt 1 the surface hardening portion 11 that has increased hardness and that is applied with a compressive residual stress. As a result, the present invention can improve the fatigue resistance of the male screw 10 and the bolt is effective as a bolt to be used in a portion where the male screw 10 is subject to a repetitive stress.
    Type: Application
    Filed: January 25, 2007
    Publication date: January 1, 2009
    Inventors: Norikazu Tezuka, Kazuharu Hirokawa, Keisuke Ihara, Kei Osawa, Hiroshi Ishikawa, Taiji Torigoe, Ryuichi Yamamoto, Yukihiro Hashimoto, Nobuyuki Izutsu, Koji Takahashi