Patents by Inventor Tatsuya Arai

Tatsuya Arai 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: 20130029842
    Abstract: The present invention provides core-shell type metal nanoparticles having a high surface coverage of the core portion with the shell portion, and a method for producing the same. Disclosed is core-shell type metal nanoparticles comprising a core portion comprising a core metal material and a shell portion covering the core portion, wherein the core portion substantially has no {100 } plane of the core metal material on the surface thereof.
    Type: Application
    Filed: April 7, 2010
    Publication date: January 31, 2013
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hiroko Kimura, Naoki Takehiro, Koshi Sekizawa, Atsuo Iio, Tatsuya Arai
  • Publication number: 20130029248
    Abstract: A fuel cell including a single fuel cell which includes a membrane electrode including a polymer electrolyte membrane, an anode electrode on one surface of the polymer electrolyte membrane, and a cathode electrode on another surface of the polymer electrolyte membrane, the anode electrode including an anode catalyst layer and a gas diffusion layer and the cathode electrode including a cathode catalyst layer and a gas diffusion layer. At least one of the anode cathode catalyst layers includes core-shell type catalyst particles, each having a core and a shell covering the core and including a shell metallic material. At least one of the polymer electrolyte membrane, anode catalyst layer, gas diffusion layer at the anode side, cathode catalyst layer and gas diffusion layer at the cathode side includes metallic nanoparticles having an average particle diameter different from that of the core-shell type catalyst particles and including the shell metallic material.
    Type: Application
    Filed: April 7, 2010
    Publication date: January 31, 2013
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tatsuya Arai, Naoki Takehiro, Atsuo Iio, Koshi Sekizawa, Hiroko Kimura
  • Publication number: 20130022899
    Abstract: Core-shell type metal nanoparticles including a core portion and a shell portion covering the core portion, wherein the core portion includes a core metal material selected from metals and alloys, and wherein the shell portion includes an alloy of a first shell metal material and a second shell metal material.
    Type: Application
    Filed: April 7, 2010
    Publication date: January 24, 2013
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tatsuya Arai, Naoki Takehiro, Atsuo Iio, Hiroko Kimura
  • Patent number: 8357013
    Abstract: The present invention involves connectors for reducing Far-End Crosstalk (FEXT) through the use of novel polarity swapping to negate the cumulative effect of FEXT. Skew adjustment is used to improve the FEXT cancellation from polarity swapping. The polarity reversal location or locations among FEXT sources are optimized to achieve maximum FEXT cancellation. The novelty polarity swapping technique can be applied to a wide variety of connectors, such as mezzanine connectors, backplane connectors, and any other connectors that can benefit from FEXT reduction.
    Type: Grant
    Filed: November 5, 2009
    Date of Patent: January 22, 2013
    Assignee: Hirose Electric Co., Ltd.
    Inventors: Tatsuya Arai, Ching-Chao Huang, Clement Kam Lam Luk, Jeremy Buan, Tsutomu Matsuo, Toshiyuki Takada, Masakazu Nagata
  • Publication number: 20120264835
    Abstract: A method of producing a sulfonated polyarylether block copolymer is provided. The method includes producing a sulfonated polyarylether block copolymer containing a hydrophobic segment having a structural unit represented by formula (5) and a hydrophilic segment having a structural unit having a sulfonic acid groups or derivative thereof incorporated into a structure represented by formula (6). A hydrophilic segment prepolymer having a sulfonic acid group in a potassium salt form and a hydrophobic segment prepolymer are block copolymerized. A proton conductor that includes the sulfonated polyarylether block copolymer is also provided.
    Type: Application
    Filed: March 2, 2012
    Publication date: October 18, 2012
    Applicant: UBE INDUESTIRES, LTD.
    Inventors: Tetsuji HIRANO, Nobuharu HISANO, Tatsuya ARAI, Masayuki KINOUCHI
  • Publication number: 20120259189
    Abstract: New algorithms to estimate cardiovascular indices by analysis of the arterial blood pressure (ABP) signal. The invention comprises recording and identification of cardiovascular descriptors (including ABP signal, diastolic pressure, systolic pressure, pulse pressure, and end systole), calculation of cardiovascular system parameters, and calculation of aortic blood flow, stroke volume, cardiac output, total peripheral resistance, and characteristic time constant.
    Type: Application
    Filed: March 21, 2012
    Publication date: October 11, 2012
    Applicant: Massachusetts Institute of Technology
    Inventors: Richard Jonathan Cohen, Tatsuya Arai
  • Publication number: 20120208105
    Abstract: Disclosed is a catalyst particle having high catalyst activity and a method for producing the catalyst particle. A catalyst particle comprising a core particle which contains a palladium alloy and an outermost layer which contains platinum, wherein an interlayer comprising only palladium as a simple substance is present between the core particle and the outermost layer.
    Type: Application
    Filed: July 21, 2010
    Publication date: August 16, 2012
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tatsuya Arai, Naoki Takehiro, Koshi Sekizawa, Hiroko Kimura, Atsuo Iio
  • Patent number: 8221932
    Abstract: A fuel cell 10 includes an MEA 200, an anode separator 100 and a cathode separator 300. The anode separator 100 forms alternate first and second flow channels 110 and 120. The first flow channel 110 is blocked in the middle. The second flow channel 120 is blocked in the both ends. The anode separator 300 forms alternate first and second flow channels 310 and 320. The first flow channel 310 is blocked in the middle. The second flow channel 320 is blocked in the both ends.
    Type: Grant
    Filed: January 20, 2010
    Date of Patent: July 17, 2012
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Naoki Takehiro, Shinji Jomori, Takumi Taniguchi, Keiichi Kaneko, Tatsuya Arai
  • Publication number: 20120171598
    Abstract: A polymer electrolyte composition of a sulfonated block copolymer (A) having a hydrophilic segment with a sulfonic acid group and a hydrophobic segment with no sulfonic acid group, each segment having an aromatic ring is its main chain, and an aromatic polymer (B) having no sulfonic acid group with a structural unit that is identical to the structural unit contained in the hydrophobic segment of the sulfonated block copolymer is provided. The ion-exchange capacity of the composition can be in a range of 0.5 mmol/g to 2.9 mmol/g. Electrolyte membranes, membrane/electrolyte assemblies, and electrolyte fuel cells utilizing the polymer electrolyte composition are also provide.
    Type: Application
    Filed: March 2, 2012
    Publication date: July 5, 2012
    Applicant: UBE INDUSTRIES, LTD.
    Inventors: Tetsuji HIRANO, Nobuharu HISANO, Tatsuya ARAI, Masayuki KINOUCHI
  • Publication number: 20120164557
    Abstract: A method for producing a polymer electrolyte membrane having a strong acid group or a superstrong acid group is provided. The method includes casting on a support a polymer electrolyte solution containing from 0.0005 to 2 parts by weight of a phosphate ester represented by formula (11) and/or a salt between an amine represented by formula (12) and a phosphate ester represented by formula (11), with respect to 100 parts by weight of a polymer electrolyte; heating the solution until a solvent of the solution is evaporated to form a self-supporting membrane; and removing the self-supporting membrane from the support.
    Type: Application
    Filed: March 2, 2012
    Publication date: June 28, 2012
    Applicant: UBE INDUSTRIES, LTD.
    Inventors: Tetsuji HIRANO, Nobuharu HISANO, Tatsuya ARAI, Masayuki KINOUCHI
  • Patent number: 8163432
    Abstract: The present invention provides a fuel cell capable of inhibiting desiccation and flooding of a membrane electrode assembly. The fuel cell has a laminated body having a membrane electrode assembly including an electrolyte membrane sandwiched by an anode catalyst layer and a cathode catalyst layer. A pair of separators sandwiches the laminated body, and between at least one separator and the laminated body, inlet and outlet passages are formed. The inlet passage is blocked at a downstream end of the reaction gas supplied to the laminated body and the outlet passage is blocked at an upstream end of the reaction gas having passed through the laminated body. The inlet passage and the outlet passage are arranged separately from each other. The depth of the upstream region of the inlet passage is larger than that of the downstream region of the inlet passage.
    Type: Grant
    Filed: December 12, 2008
    Date of Patent: April 24, 2012
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Shinji Jomori, Naoki Takehiro, Tatsuya Arai, Keiichi Kaneko, Takumi Taniguchi
  • Patent number: 8159179
    Abstract: In the battery charging device of the present invention, a U, V, W phase voltage generating circuit detects a voltage signal of a U phase sub-coil of a three-phase alternating current generator, and generates a signal of a triangular wave that is in synchronization with the U phase. Moreover, a first triangular wave is generated in synchronization with a phase from 0° to 180° of the U phase rectangular wave, and a second triangular wave is generated in synchronization with a phase from 180° to 360° of the U phase.
    Type: Grant
    Filed: March 29, 2007
    Date of Patent: April 17, 2012
    Assignees: Shindengen Electric Manufacturing Co., Ltd., Honda Motor Co., Ltd.
    Inventors: Hidenori Suzuki, Tatsuya Arai, Takeshi Yanagisawa, Atsuo Ota
  • Patent number: 8159180
    Abstract: A battery charging device of the present invention has a rectifier portion that is formed by switching elements, and performs advance angle/delay angle control. An advance angle/delay angle amount in the advance angle/delay angle control is determined based on a differential voltage between the voltage of a battery and a predetermined target voltage. In this case, when a determined delay angle amount exceeds a delay angle limit value, delay angle control is performed using the delay angle limit value. Moreover, the power generation amount of an alternating current generator is detected, and the delay angle amount and power generation amount are stored. If the current delay angle amount is greater than the previous delay angle amount, and the previous power generation amount is greater than the current power generation amount, then the previous delay angle amount is set as the delay angle limit value.
    Type: Grant
    Filed: March 29, 2007
    Date of Patent: April 17, 2012
    Assignees: Shindengen Electric Manufacturing Co., Ltd., Honda Motor Co., Ltd.
    Inventors: Hidenori Suzuki, Tatsuya Arai, Takeshi Yanagisawa, Atsuo Ota
  • Patent number: 8129070
    Abstract: The present invention provides a fuel cell having obstructed passages, which is capable of inhibiting the occurrence of flooding. The fuel cell comprises: a stacked body comprising at least a membrane electrode assembly; and a pair of separators sandwiching the stacked body. A face of the stacked body side of the separator is provided with inlet passage(s) through which reaction gas to be supplied to the stacked body passes and outlet passage(s) through which reaction gas having passed the stacked body passes. The inlet passage is obstructed at a downstream end of the reaction gas to be supplied to the stacked body and the outlet passage is obstructed at an upstream end of the reaction gas having passed through the stacked body. The inlet passage and the outlet passage is arranged separately from each other, and the inlet passage is arranged on both ends of the face of the stacked body side of the separator in the passage width direction of the inlet passage and the outlet passage.
    Type: Grant
    Filed: December 12, 2008
    Date of Patent: March 6, 2012
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Shinji Jomori, Naoki Takehiro, Tatsuya Arai, Keiichi Kaneko, Takumi Taniguchi
  • Patent number: 8106612
    Abstract: A brushless motor control device according to the present invention drives a brushless motor including a stator having coils of three phases U, V, and W and a neutral line, and a sub coil provided in any one phase of the phases U, V, and W, for detecting a voltage induced in the coil of the one phase, and the brushless motor control device carries out a conduction control function, for the respective phase coils of the brushless motor, that performs a 120° conduction when a rotation speed of the brushless motor is lower than or equal to a predetermined rotation speed, and that performs a 180° conduction when the rotation speed is higher than or equal to the predetermined rotation speed, and the brushless motor control device includes a motor control unit that controls the brushless motor based on information of the rotor stop position when activating the brushless motor, controls the brushless motor based on the first rotor position information when in the 120° conduction, and controls the brushless motor bas
    Type: Grant
    Filed: March 28, 2008
    Date of Patent: January 31, 2012
    Assignee: Shindegen Electric Manufacturing Co., Ltd.
    Inventors: Tomomi Harada, Tatsuya Arai
  • Publication number: 20120010069
    Abstract: A method of producing a core-shell catalyst particle, the method including: preparing a core particle that contains an alloy including a first core metal having a standard electrode potential of at least 0.6 V and a second core metal having a standard electrode potential lower than that of the first core metal; eluting the second core metal at least at a surface of the core particle, the elution being carried out under conditions at which an equilibrium is maintained for the first core metal between a metal state and a hydroxide and at which an equilibrium is maintained for the second core metal between a metal state and a metal ion; and, with the core particle being designed as a core portion, coating this core portion with a shell portion after the elution of the second core metal.
    Type: Application
    Filed: July 11, 2011
    Publication date: January 12, 2012
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Naoki TAKEHIRO, Hiroko KIMURA, Tatsuya ARAI, Atsuo IIO
  • Publication number: 20120003562
    Abstract: A fuel cell 10 includes an MEA 200, an anode separator 100 and a cathode separator 300. The anode separator 100 forms alternate first and second flow channels 110 and 120. The first flow channel 110 is blocked in the middle. The second flow channel 120 is blocked in the both ends. The anode separator 300 forms alternate first and second flow channels 310 and 320. The first flow channel 310 is blocked in the middle. The second flow channel 320 is blocked in the both ends.
    Type: Application
    Filed: January 20, 2010
    Publication date: January 5, 2012
    Applicants: UTC POWER CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Naoki Takehiro, Shinji Jomori, Takumi Taniguchi, Keiichi Kaneko, Tatsuya Arai
  • Publication number: 20110236787
    Abstract: The present invention provides a fuel cell having obstructed passages, which is capable of inhibiting the occurrence of flooding. The fuel cell comprises: a stacked body comprising at least a membrane electrode assembly; and a pair of separators sandwiching the stacked body. A face of the stacked body side of the separator is provided with inlet passage(s) through which reaction gas to be supplied to the stacked body passes and outlet passage(s) through which reaction gas having passed the stacked body passes. The inlet passage is obstructed at a downstream end of the reaction gas to be supplied to the stacked body and the outlet passage is obstructed at an upstream end of the reaction gas having passed through the stacked body. The inlet passage and the outlet passage is arranged separately from each other, and the inlet passage is arranged on both ends of the face of the stacked body side of the separator in the passage width direction of the inlet passage and the outlet passage.
    Type: Application
    Filed: December 12, 2008
    Publication date: September 29, 2011
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Shinji Jomori, Naoki Takehiro, Tatsuya Arai, Keiichi Kaneko, Takumi Taniguchi
  • Publication number: 20110123896
    Abstract: The present invention provides a fuel cell having a blocked passage and showing capability of inhibiting desiccation and flooding of the membrane electrode assembly.
    Type: Application
    Filed: December 12, 2008
    Publication date: May 26, 2011
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Shinji Jomori, Naoki Takehiro, Tatsuya Arai, Keiichi Kaneko, Takumi Taniguchi
  • Publication number: 20100331432
    Abstract: A polyimide foam formed of an aromatic polyimide prepared from a 3,3?,4,4?-biphenyltetracarboxylic acid component and an aromatic diamine component. The polyimide foam has flexibility at least such that no cracking occurs when a specimen of the polyimide foam with a 1 cm by 1 cm cross-section and a length of 5 cm is deformed until both ends thereof come into contact with each other to make a closed loop. The polyimide foam is obtained by dissolving a 3,3?,4,4?-biphenyltetracarboxylic acid component and an aromatic diamine component in a solvent in the presence of an acid phosphoric ester having a specific structure to prepare a polyimide precursor and heating the polyimide precursor to expand.
    Type: Application
    Filed: July 11, 2008
    Publication date: December 30, 2010
    Applicant: UBE INDUSTRIES, LTD.
    Inventors: Tatsuya Arai, Hiroaki Yamaguchi