Patents by Inventor Takeshi Iwamiya

Takeshi Iwamiya 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 apparatus and method of control thereof
    Patent number: 5327718
    Abstract: A gas turbine apparatus has a gas turbine and a plurality of burners for providing combustion gas to drive the turbine. A flow control means of each burner for fuel or combustion air is adjusted by control means to control each said burner individually in dependence on a predetermined combustion characteristic of the respective burner. Sensed quantities relating to the combustion performance of the burners are input to the control means which adjusts the flow control means of each burner in dependence on the sensed quantities and the predetermined combustion characteristic of the respective burner.
    Type: Grant
    Filed: August 21, 1992
    Date of Patent: July 12, 1994
    Assignee: Hitachi, Ltd.
    Inventors: Naohiko Iwata, Yasuhiko Otawara, Akira Shimura, Nobuyuki Iizuka, Isao Sato, Fumiyuki Hirose, Minoru Takaba, Yasutaka Komatsu, Hiraku Ikeda, Takeshi Iwamiya, Takeshi Ishida
  • Combustion apparatus and control method therefor
    Patent number: 5281129
    Abstract: To provide a combustion apparatus and a controlling method therefor which are capable of preventing the flame-out and backfire of the flame of a premix burner and the increase of the NOx concentration attributable to the change of the calorific value of the fuel, the amount of air supplied to the premix burner is so controlled as to achieve a low NOx within the range in which the premix burner effects a stable combustion in accordance with the calorie of the fuel supplied to the combustion apparatus, and a change of the output of the combustion apparatus attributable to this control of the amount of air is compensated by the control of the amount of the fuel supplied to the diffusion burner.
    Type: Grant
    Filed: February 25, 1992
    Date of Patent: January 25, 1994
    Assignee: Hitachi, Ltd.
    Inventors: Haruo Urushidani, Seisaku Takihana, Kazuhiko Kumata, Akira Shimura, Osamu Arai, Takeshi Iwamiya, Hiraku Ikeda
  • Servo valve control apparatus
    Patent number: 5214913
    Abstract: A method of and apparatus for controlling a triple-coil servo valve arranged having a tripled control system each of which is composed of components of a coil, a servo amplifier and a controller, the method of and the apparatus for controlling the triple servo valve including means for specifying the abnormality of each of the components, servo amplifier output separation means, means capable of desirably combining the components and means for compensating the servo amplifier. If two control systems of the tripled control system are faulty in such a manner that at least one coil, at least one servo amplifier or at least one controller is abnormal, the triple-coil servo is operated by combining the normal components or by compensating the servo amplifier so that the continuation of the operation of the plant is enabled.
    Type: Grant
    Filed: May 22, 1991
    Date of Patent: June 1, 1993
    Assignee: Hitachi, Ltd.
    Inventors: Yukiyoshi Tani, Sadao Yanada, Takeshi Iwamiya, Takumi Kawai, Tadahiko Iijima