Patents by Inventor Keita Fujii

Keita Fujii 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).

  • Publication number: 20140290910
    Abstract: An intake air cooling system 100 for a gas turbine 18 is provided with: an intake duct 12 for leading intake air taken in from an intake-air inlet 22 to a compressor 14 of the gas turbine 18; a cooling part 26 provided in the intake duct to cool the intake air by heat exchange with a cooling medium introduced from an outside; a drain discharge line 102 connected to a part of the intake duct below an inlet 14a of the compressor so as to discharge drain water flowing along an inner peripheral surface of the intake duct; and a water seal part 104 provided in the drain discharge line 102 to keep water seal in a part of the drain discharge line 102 by a water pressure at least corresponding to an amount of a negative pressure in the vicinity of the inlet of the compressor.
    Type: Application
    Filed: March 18, 2014
    Publication date: October 2, 2014
    Applicant: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Keita Fujii, Kohei Hidaka, Jiro Asakuno, Masaru Takamatsu, Tadakuni Nishio, Tatsunao Nagashima, Katsuhiro Hotta, Masashi Nishimura
  • Publication number: 20100154434
    Abstract: Disclosed is a gas turbine enabling turn down operation, of which the system and the operation can be simplified, and also the production cost and the maintenance cost can be reduced. Specifically disclosed is a gas turbine comprising: a compressor section (2); a combustor section (3); a turbine section (4); a gas turbine casing which houses the compressor section (2), the combustor section (3), and the turbine section (4) therein; a stator cooling air system (5) for leading compressed air extracted from midstream of the compressor section (2) into stator vanes which constitute the turbine section (4); and an air bleeding system (6) for extracting compressed air from the exit of the compressor section (2) to the outside of the gas turbine casing, wherein midstream of the stator cooling air system (5) and midstream of the air bleeding system (6) are connected via a connecting path (12), and at midstream of this connecting path (12), there is a flow rate control part (13) connected.
    Type: Application
    Filed: December 1, 2009
    Publication date: June 24, 2010
    Inventors: Tetsuro Kubota, Tatsuji Takahashi, Keita Fujii, Hiroto Katsura
  • Patent number: 6773225
    Abstract: In order to provide a gas turbine and a gas bleeding method which can prevent the loss of drive power due to gas bleeding to the rotor disk, bleed gas is imparted with swirling flow in the same rotational direction as that of a first stage rotor disk by being passed through a set of TOBI nozzles which constitute a flow conduit therefor, and is supplied to this first stage rotor disk, with a portion of this bleed gas flow being bypassed and being supplied between first stage stationary blades and first stage moving blades.
    Type: Grant
    Filed: May 30, 2002
    Date of Patent: August 10, 2004
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Masanori Yuri, Vincent Laurello, Charles Ellis, Mitsuhiro Noguchi, Keita Fujii
  • Publication number: 20030223856
    Abstract: In order to provide a gas turbine and a gas bleeding method which can prevent the loss of drive power due to gas bleeding to the rotor disk, bleed gas is imparted with swirling flow in the same rotational direction as that of a first stage rotor disk by being passed through a set of TOBI nozzles which constitute a flow conduit therefor, and is supplied to this first stage rotor disk, with a portion of this bleed gas flow being bypassed and being supplied between first stage stationary blades and first stage moving blades.
    Type: Application
    Filed: May 30, 2002
    Publication date: December 4, 2003
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Masanori Yuri, Vincent Laurello, Charles Ellis, Mitsuhiro Noguchi, Keita Fujii