Patents by Inventor Akihiro Onoda

Akihiro Onoda 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).

  • Axial flow turbine
    Publication number: 20070086891
    Abstract: An axial flow turbine provided with a stage composed of a turbine nozzle and a turbine rotor blade arranged in an axial flow direction. Both end portions of a nozzle blade of the turbine nozzle are supported by a diaphragm inner ring and a diaphragm outer ring, and a flow passage is formed to have its diameter expanded from an upstream stage to a downstream stage. In such axial flow turbine, trailing edges at ends of the nozzle blade supported by the diaphragm inner ring and the diaphragm outer ring are curved as a curvature to an outlet side, and an intermediate portion between the trailing edges is formed to be straight.
    Type: Application
    Filed: March 30, 2006
    Publication date: April 19, 2007
    Inventors: Daisuke Nomura, Sakae Kawasaki, Akihiro Onoda, Kentaro Tani, Hiroshi Kawakami
  • Methods of operation a dual-fuel injector for a gas turbine with simultaneous liquid and gaseous fuels injection during transients
    Patent number: 6330789
    Abstract: A gas-turbine dual-fuel injector is operated on liquid fuel at start-up and on gaseous fuel from a gasifier during steady state. During load transients, the operation is switched back to liquid fuel, however a small amount of gaseous fuel continues to be injected as well.
    Type: Grant
    Filed: January 4, 2001
    Date of Patent: December 18, 2001
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Akihiro Onoda, Yasunori Iwai
  • Coal gasification combined cycle power generation plant and an operating method thereof
    Publication number: 20010001171
    Abstract: A coal gasification combined cycle power generation plant generally includes a gas turbine system, a fuel supply system, an air supply system and an exhaust gas system, which are operatively connected to each other. The gas turbine system includes a combustor for selectively burning a coal gasification fuel obtained by gasifying a coal and a liquid fuel atomized by an atomization air and a gas turbine to which a combustion gas generated in the combustor is supplied. The fuel supply system is provided with a liquid fuel supply passage for the combustor through a fuel nozzle provided for the combustor, an atomization air supply passage for the combustor through the fuel nozzle and a coal gasification fuel supply passage for the combustor through the fuel nozzle, all of these supply passages being arranged so as to be adjacent to each other.
    Type: Application
    Filed: January 4, 2001
    Publication date: May 17, 2001
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Akihiro Onoda, Yasunori Iwai
  • Coal gasification combined cycle power generation plant and an operating method thereof
    Patent number: 6199368
    Abstract: A coal gasification combined cycle power generation plant generally includes a gas turbine system, a fuel supply system, an air supply system and an exhaust gas system, which are operatively connected to each other. The gas turbine system includes a combustor for selectively burning a coal gasification fuel obtained by gasifying a coal and a liquid fuel atomized by an atomization air and a gas turbine to which a combustion gas generated in the combustor is supplied. The fuel supply system is provided with a liquid fuel supply passage for the combustor through a fuel nozzle provided for the combustor, an atomization air supply passage for the combustor through the fuel nozzle and a coal gasification fuel supply passage for the combustor through the fuel nozzle, all of these supply passages being arranged so as to be adjacent to each other.
    Type: Grant
    Filed: August 24, 1998
    Date of Patent: March 13, 2001
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Akihiro Onoda, Yasunori Iwai