Patents by Inventor Yasuo Takahashi

Yasuo Takahashi 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: 20120163965
    Abstract: When a gas turbine is operated with inlet guide vanes (IGVs) closed during part load operation or the like, the degradation of aerodynamic performance and of reliability may potentially occur since the load on rear stage side vanes of a compressor increases. An object of the present invention is to suppress the degradation of the aerodynamic performance and of reliability of an axial compressor. The axial compressor includes a rotor; a plurality of rotor blade rows installed on the rotor; a casing located outside of the rotor blade rows; a plurality of stator vane rows installed on the casing; and exit guide vanes installed on the downstream side of a final stage stator vane row among the stator vane rows. An incidence angle of a flow toward the final stage stator vane row is equal to or below a limit line of an incidence operating range.
    Type: Application
    Filed: December 23, 2011
    Publication date: June 28, 2012
    Applicant: Hitachi, Ltd.
    Inventors: Yasuo TAKAHASHI, Chihiro Myoren, Ryou Akiyama
  • Publication number: 20120132927
    Abstract: An ohmic electrode for a p-type SiC semiconductor, and a method of forming the ohmic electrode. The ohmic electrode has an ohmic electrode layer, which has an amorphous structure and which is made of a Ti(1?x?y)Si(s)C(y) ternary film of which a composition ratio is within a composition range that is surrounded by two lines and two curves expressed by an expression x=0 (0.35?y?0.5), an expression y=?1.120x+0.5200 (0.1667?x?0.375), an expression y=1.778(x?0.375)2+0.1 (0?x?0.375) and an expression y=?2.504x2?0.5828x+0.5 (0?x?0.1667) and that excludes the line expressed by the expression x=0. The ohmic layer is directly laminated on a surface of a p-type SiC semiconductor.
    Type: Application
    Filed: August 4, 2010
    Publication date: May 31, 2012
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Akinori Seki, Masahiro Sugimoto, Akira Kawahashi, Yasuo Takahashi, Masakatsu Maeda
  • Publication number: 20120093637
    Abstract: An axial compressor includes a plurality of stator vanes attached to an inner surface of a casing defining an annular flow path and a plurality of rotor blades attached to a rotating rotor defining the annular flow path. A flow path is defined between a pressure surface of a stator vane and a suction surface of a stator vane, the vanes being circumferentially adjacent to each other, or between a pressure surface of a rotor blade and a suction surface of a rotor blade, the blades being circumferentially adjacent to each other. The flow path is formed so that a throat portion at which a flow path width is minimized is provided on the upstream side of 50% of an axial chord length.
    Type: Application
    Filed: October 13, 2011
    Publication date: April 19, 2012
    Applicant: Hitachi, Ltd.
    Inventors: Yasuo TAKAHASHI, Chihiro Myoren
  • Publication number: 20120076650
    Abstract: There is provided a shroud structure for gas turbines capable of suppressing a drop in the amount of cooling air for cooling the inner shroud by reducing the amount of cooling air leakage that occurs along the cooling air path when feeding cooling air from the one-piece outer shroud to the inner shroud of the gas turbine and ensure more reliable cooling of the inner shroud. The gas turbine shroud structure contains a one-piece outer shroud, and an inner shroud retained on the inner circumferential side of the outer shroud in a structure divided into multiple inner shrouds along the periphery. An inner seal plate groove is formed on the outer circumference of the hook formed on the inner shroud, a seal plate is inserted in the inner seal plate groove, and the seal plate is mounted so that a section of the seal plate protrudes in the gap between the hook mechanism of the outer shroud and the inner shroud.
    Type: Application
    Filed: August 4, 2011
    Publication date: March 29, 2012
    Applicant: Hitachi, Ltd.
    Inventors: Ryou AKIYAMA, Yasuo Takahashi, Tetsuro Morisaki, Yasuhiro Horiuchi
  • Publication number: 20120070267
    Abstract: There is provided an axial flow compressor that improves reliability on an increase in a blade loading on a last-stage stator vane of the axial flow compressor due to a partial load operation of a gas turbine. An annular flow passage is formed by a rotor having multiple rotor blades fitted thereto and a casing having multiple stator vanes fitted thereto, two or more of the stator vanes are disposed downstream of a last-stage rotor blade that is the rotor blade disposed. at the most downstream side in a flow direction of the annular flow passage, a blade loading on a first stator vane disposed at the most upstream side is set to be smaller than a blade loading of a second stator vane disposed downstream of the first stator vane by one row.
    Type: Application
    Filed: August 4, 2011
    Publication date: March 22, 2012
    Applicant: Hitachi, Ltd.
    Inventors: Yasuo TAKAHASHI, Chihiro Myoren, Ryou Akiyama, Ichiro Miyoshi
  • Publication number: 20120060509
    Abstract: An inner bleed structure of the 2-shaft gas turbine includes a slit for leading part of compressed air to a cavity is formed between a wall surface of a rotor wheel of the compressor equipped with a last stage rotor of the compressor which is connected to a first rotating shaft and end of an inner casing, and a bleed hole for leading part of compressed air after flowing down the last stage of the compressor to a cavity formed in the inner side of the inner casing at the downstream side of the last stage of the compressor.
    Type: Application
    Filed: August 5, 2011
    Publication date: March 15, 2012
    Applicant: Hitachi, Ltd.
    Inventors: Chihiro MYOREN, Ryou Akiyama, Shinya Marushima, Yasuo Takahashi, Shinichi Higuchi
  • Publication number: 20110287626
    Abstract: The invention provides an ohmic electrode of a p-type SiC semiconductor element, which includes an ohmic electrode layer that is made of Ti3SiC2, and that is formed directly on a surface of a p-type SiC semiconductor. The invention also provides a method of forming an ohmic electrode of a p-type SiC semiconductor element. The ohmic electrode includes an ohmic electrode layer that is made of Ti3SiC2, and that is formed directly on a surface of a p-type SiC semiconductor. The method includes forming a ternary mixed film that includes Ti, Si, and C in a manner such that an atomic composition ratio, Ti:Si:C is 3:1:2, on a surface of a p-type SiC semiconductor to produce a laminated film; and annealing the produced laminated film under vacuum or under an inert gas atmosphere.
    Type: Application
    Filed: January 29, 2010
    Publication date: November 24, 2011
    Inventors: Akinori Seki, Masahiro Sugimoto, Akira Kawahashi, Yasuo Takahashi, Masakatsu Maeda
  • Patent number: 8008180
    Abstract: A method of forming an Ohmic contact on a P-type 4H—SiC and an Ohmic contact formed by the same are provided. A method of forming an Ohmic contact on a P-type 4H—SiC substrate including a deposition step of successively depositing a 1 to 60 nm thick first Al layer, Ti layer, and second Al layer on a P-type 4H—SiC substrate and an alloying step of forming an alloy layer between the SiC substrate and the Ti layer through the first Al layer by heat treatment in a nonoxidizing atmosphere. An Ohmic contact on a P-type 4H—SiC substrate formed by this method is also provided.
    Type: Grant
    Filed: March 13, 2008
    Date of Patent: August 30, 2011
    Assignees: Toyota Jidosha Kabushiki Kaisha, Osaka University
    Inventors: Yasuo Takahashi, Masakatsu Maeda, Akinori Seki, Akira Kawahashi, Masahiro Sugimoto
  • Publication number: 20110181635
    Abstract: Disclosed herein is a driving method for an image display apparatus which includes an image display panel having a plurality of pixels arrayed in a two-dimensional matrix and each configured from a first subpixel for displaying a first primary color, a second subpixel for displaying a second primary color, a third subpixel for displaying a third primary color and a fourth subpixel for displaying a fourth color, and a signal processing section. The signal processing section is capable of calculating a first subpixel output signal, a second subpixel output signal, a third subpixel output signal, and a fourth subpixel output signal. The driving method includes a step of calculating a maximum value (Vmax(S)) of brightness, a saturation (S) and brightness (V(S)), and determining the expansion coefficient (?0).
    Type: Application
    Filed: January 18, 2011
    Publication date: July 28, 2011
    Applicant: SONY CORPORATION
    Inventors: Masaaki Kabe, Amane Higashi, Yasuo Takahashi, Akira Sakaigawa
  • Publication number: 20110181634
    Abstract: Disclosed herein is a driving method for an image display apparatus which includes an image display panel and a signal processing section; the driving method including the steps, further carried out by the signal processing section, of calculating a third subpixel output signal to a (p,q)th first pixel, based at least on a third subpixel input signal to the (p,q)th first pixel and a third subpixel input signal to the (p,q)th second signal, and outputting the third subpixel output signal to the third subpixel of the (p,q)th first pixel; and further calculating a fourth subpixel output signal to the (p,q)th second pixel based at least on the third subpixel input signal to the (p,q)th second pixel and the third subpixel input signal to the (p+1,q)th first pixel and outputting the fourth subpixel output signal to the fourth subpixel of the (p,q)th second pixel.
    Type: Application
    Filed: January 18, 2011
    Publication date: July 28, 2011
    Applicant: SONY CORPORATION
    Inventors: Amane Higashi, Akira Sakaigawa, Masaaki Kabe, Yasuo Takahashi
  • Publication number: 20110181633
    Abstract: Disclosed herein is a driving method for an image display apparatus which includes an image display panel and a signal processing section. Each of the pixels includes a first subpixel for displaying a first primary color, a second subpixel for displaying a second primary color, a third subpixel for displaying a third primary color and a fourth subpixel for displaying a fourth color. The signal processing section is capable of calculating a first subpixel output signal, a second subpixel output signal, and a third subpixel output signal. The driving method includes the step, further carried out by the signal processing section, of calculating a fourth subpixel output signal based on a fourth subpixel control second signal and a fourth subpixel control first signal, and outputting the calculated fourth subpixel output signal to the fourth subpixel of the (p,q)th pixel.
    Type: Application
    Filed: January 14, 2011
    Publication date: July 28, 2011
    Applicant: SONY CORPORATION
    Inventors: Amane Higashi, Akira Sakaigawa, Masaaki Kabe, Yasuo Takahashi
  • Patent number: 7985712
    Abstract: RE superconductive layer excelling in Jc and Tc is formed on an interlayer capable of preventing cracking and diffusion of substrate-constituting Ni element into YBCO layer and excelling in crystallinity and surface smoothness. The interlayer is formed by coating a surface of metal substrate with a mixed solution composed of an organometallic acid salt of cerium, an organometallic acid salt of a solid solution formation element capable of forming a solid solution with cerium and an organometallic acid salt of a charge compensation element capable of compensating for a charge mismatch attributed to a difference between the electron valences of respective ions of cerium and the solid solution formation element and subsequently carrying out heat treatment in a reducing atmosphere of 900 to 1200° C. whose pressure ranges from 0.1 Pa to below atmospheric pressure. Thereafter, a rare earth oxide superconductive layer is formed on the interlayer.
    Type: Grant
    Filed: March 12, 2004
    Date of Patent: July 26, 2011
    Assignees: International Superconductivity Technology Center, The Juridical Foundation, Showa Electric Wire & Cable Co., Ltd.
    Inventors: Yuji Aoki, Yasuo Takahashi, Takayo Hasegawa
  • Patent number: 7937947
    Abstract: The invention is intended to maintain turbine reliability when, based on a gas turbine designed for one desired cycle, a gas turbine for another different cycle is manufactured. A channel of a compressor is formed such that a mass flow of a fluid compressed by the compressor changes. Thus, when manufacturing, based on the gas turbine designed for one desired cycle, the gas turbine for another different cycle, turbine reliability can be maintained.
    Type: Grant
    Filed: June 24, 2008
    Date of Patent: May 10, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Tadaharu Kishibe, Yasuo Takahashi, Hisashi Hamatake
  • Publication number: 20110105336
    Abstract: The present invention relates to a rare earth element oxide superconductive wire material improved in orientation by forming the bed layer by the MOD method. In the superconductive wire material (10) produced by forming a MOD-CZO layer (2), an IBS-GZO (3), an IBAD-MgO layer (4), a LMO layer (5), a PLD-CeO2 layer (6) and a PLD-GdBCO superconductive layer (8) in this order on an electropolished substrate (1) in an oxygen atmosphere, the CeO2 layer has a value of ??=4.2 degrees, which is almost the same as in the case of using a mechanically polished substrate, and the GdBCO super conductive layer has a value of Ic=243 A (Jc=up to 5 MA/cm2), which is almost the same as in the case of using a mechanically polished substrate.
    Type: Application
    Filed: May 11, 2010
    Publication date: May 5, 2011
    Applicant: International Superconductivity Technology Center, The Juridical Foundation
    Inventors: Yasuo TAKAHASHI, Masateru YOSHIZUMI, Teruo IZUMI
  • Patent number: 7913495
    Abstract: The invention is intended to maintain turbine reliability when, based on a gas turbine designed for one desired cycle, a gas turbine for another different cycle is manufactured. A channel of a compressor is formed such that a mass flow of a fluid compressed by the compressor changes. Thus, when manufacturing, based on the gas turbine designed for one desired cycle, the gas turbine for another different cycle, turbine reliability can be maintained.
    Type: Grant
    Filed: June 24, 2008
    Date of Patent: March 29, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Tadaharu Kishibe, Yasuo Takahashi, Hisashi Hamatake
  • Publication number: 20110048043
    Abstract: A heat pump includes an evaporator 10 evaporating water; a steam compressor 1 compressing the vapor generated by the evaporator 10; a vapor supply duct 31 adapted to supply the vapor 30 compressed by the compressor 1 to steam-utilizing facility 2; a measuring device 91 for measuring a state of vapor between the evaporator 10 and the compressor 1; and a valve 81 adjusting an amount of vapor flowing in the compressor 1 based on information from the measuring device 91.
    Type: Application
    Filed: November 9, 2010
    Publication date: March 3, 2011
    Applicant: HITACHI, LTD.
    Inventors: Yasuo TAKAHASHI, Takanori SHIBATA, Hidefumi ARAKI
  • Publication number: 20110043483
    Abstract: A display with a touch panel allowed to achieve high response performance while reducing power consumption is obtained.
    Type: Application
    Filed: February 8, 2010
    Publication date: February 24, 2011
    Applicant: SONY CORPORATION
    Inventors: Hiroshi Mizuhashi, Yasuo Takahashi
  • Patent number: 7879705
    Abstract: A method is set forth of forming an ohmic electrode having good characteristics on a SiC semiconductor layer. In the method, a Ti-layer and an Al-layer are formed on a surface of the SiC substrate. The SiC substrate having the Ti-layer and the Al-layer is maintained at a temperature that is higher than or equal to a first temperature and lower than a second temperature until all Ti in the Ti-layer has reacted with Al. The first temperature is the minimum temperature of a temperature zone at which the Ti reacts with the Al to form Al3Ti, and the second temperature is the minimum temperature of a temperature zone at which the Al3Ti reacts with SiC to form Ti3SiC2. As a result of this maintaining of temperature step, an Al3Ti-layer is formed on the surface of the SiC substrate. The method also comprises further heating the SiC substrate having the Al3Ti-layer to a temperature that is higher than the second temperature.
    Type: Grant
    Filed: September 21, 2007
    Date of Patent: February 1, 2011
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Akira Kawahashi, Masahiro Sugimoto, Akinori Seki, Masakatsu Maeda, Yasuo Takahashi
  • Publication number: 20100229566
    Abstract: Disclosed herein is a highly-reliable two-shaft gas turbine system in which the rotational speed of a compressor exceeds its rated rotational speed when the combustion temperature during rated operation is set to the rated combustion temperature of a simple-cycle gas turbine system and in which the drive force for the compressor can be balanced with the output from a high-pressure turbine without turbine efficiency being compromised. When the rotational speed of a compressor 1 exceeds its rated rotational speed on the condition that the combustion temperature during rated operation is set to the rated combustion temperature of a simple-cycle gas turbine system, part of the working fluid that drives turbines is diverged from a flow path that guides the working fluid to gas paths and used as a coolant.
    Type: Application
    Filed: February 18, 2010
    Publication date: September 16, 2010
    Inventors: Yasuo TAKAHASHI, Tomomi KOGANEZAWA, Shinichi HIGUCHI
  • Publication number: 20100215503
    Abstract: A transonic blade is provided that operates in a flow field where flow has a transonic speed or higher in an axial-flow rotating machine and that concurrently achieves a reduction in shock loss and in the local stress of the blade. The transonic blade includes a hub cross-sectional surface joined to a rotating shaft or an outer circumferential side casing of a rotating machine; a tip cross-sectional surface located furthest from the hub cross-sectional surface in a spanwise direction which is a vertical direction of the rotating shaft; a leading edge located on an upstream side; and a trailing edge located on a downstream side. At least a part of a passing working fluid flow has a transonic speed or higher. A portion of a stacking line which is a line connecting together respective gravity centers of cross-sectional surfaces located from the hub cross-sectional surface to the tip cross-sectional surface is located on a downstream side of a stacking center in a flow direction of a working fluid main flow.
    Type: Application
    Filed: February 17, 2010
    Publication date: August 26, 2010
    Inventors: Chihiro MYOREN, Yasuo Takahashi