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).
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Patent number: 8221932Abstract: 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: GrantFiled: January 20, 2010Date of Patent: July 17, 2012Assignee: Toyota Jidosha Kabushiki KaishaInventors: Naoki Takehiro, Shinji Jomori, Takumi Taniguchi, Keiichi Kaneko, Tatsuya Arai
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Publication number: 20120171598Abstract: 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: ApplicationFiled: March 2, 2012Publication date: July 5, 2012Applicant: UBE INDUSTRIES, LTD.Inventors: Tetsuji HIRANO, Nobuharu HISANO, Tatsuya ARAI, Masayuki KINOUCHI
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Publication number: 20120164557Abstract: 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: ApplicationFiled: March 2, 2012Publication date: June 28, 2012Applicant: UBE INDUSTRIES, LTD.Inventors: Tetsuji HIRANO, Nobuharu HISANO, Tatsuya ARAI, Masayuki KINOUCHI
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Patent number: 8163432Abstract: 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: GrantFiled: December 12, 2008Date of Patent: April 24, 2012Assignee: Toyota Jidosha Kabushiki KaishaInventors: Shinji Jomori, Naoki Takehiro, Tatsuya Arai, Keiichi Kaneko, Takumi Taniguchi
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Patent number: 8159179Abstract: 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: GrantFiled: March 29, 2007Date of Patent: April 17, 2012Assignees: Shindengen Electric Manufacturing Co., Ltd., Honda Motor Co., Ltd.Inventors: Hidenori Suzuki, Tatsuya Arai, Takeshi Yanagisawa, Atsuo Ota
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Patent number: 8159180Abstract: 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: GrantFiled: March 29, 2007Date of Patent: April 17, 2012Assignees: Shindengen Electric Manufacturing Co., Ltd., Honda Motor Co., Ltd.Inventors: Hidenori Suzuki, Tatsuya Arai, Takeshi Yanagisawa, Atsuo Ota
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Patent number: 8129070Abstract: 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: GrantFiled: December 12, 2008Date of Patent: March 6, 2012Assignee: Toyota Jidosha Kabushiki KaishaInventors: Shinji Jomori, Naoki Takehiro, Tatsuya Arai, Keiichi Kaneko, Takumi Taniguchi
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Patent number: 8106612Abstract: 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 basType: GrantFiled: March 28, 2008Date of Patent: January 31, 2012Assignee: Shindegen Electric Manufacturing Co., Ltd.Inventors: Tomomi Harada, Tatsuya Arai
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Publication number: 20120010069Abstract: 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: ApplicationFiled: July 11, 2011Publication date: January 12, 2012Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Naoki TAKEHIRO, Hiroko KIMURA, Tatsuya ARAI, Atsuo IIO
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Publication number: 20120003562Abstract: 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: ApplicationFiled: January 20, 2010Publication date: January 5, 2012Applicants: UTC POWER CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Naoki Takehiro, Shinji Jomori, Takumi Taniguchi, Keiichi Kaneko, Tatsuya Arai
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Publication number: 20110236787Abstract: 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: ApplicationFiled: December 12, 2008Publication date: September 29, 2011Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shinji Jomori, Naoki Takehiro, Tatsuya Arai, Keiichi Kaneko, Takumi Taniguchi
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Publication number: 20110123896Abstract: 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: ApplicationFiled: December 12, 2008Publication date: May 26, 2011Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shinji Jomori, Naoki Takehiro, Tatsuya Arai, Keiichi Kaneko, Takumi Taniguchi
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Publication number: 20100331432Abstract: 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: ApplicationFiled: July 11, 2008Publication date: December 30, 2010Applicant: UBE INDUSTRIES, LTD.Inventors: Tatsuya Arai, Hiroaki Yamaguchi
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Publication number: 20100237825Abstract: 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: ApplicationFiled: March 29, 2007Publication date: September 23, 2010Applicants: SHINDENGEN ELECTRIC MANUFACTURING CO., LTD., HONDA MOTOR CO., LTD.Inventors: Hidenori Suzuki, Tatsuya Arai, Takeshi Yanagisawa, Atsuo Ota
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Publication number: 20100183141Abstract: The present invention involves chip-to-chip communication systems 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 systems that can benefit from FEXT reduction.Type: ApplicationFiled: November 5, 2009Publication date: July 22, 2010Applicant: Hirose Electric USA Inc.Inventors: Tatsuya Arai, Ching-Chao Huang, Clement Kam Lam Luk, Jeremy Buan, Tsutomu Matsuo, Toshiyuki Takada, Masakazu Nagata
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Publication number: 20100184307Abstract: 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: ApplicationFiled: November 5, 2009Publication date: July 22, 2010Applicant: Hirose Electric USA Inc.Inventors: Tatsuya Arai, Ching-Chao Huang, Clement Kam Lam Luk, Jeremy Buan, Tsutomu Matsuo, Toshiyuki Takada, Masakazu Nagata
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Patent number: 7737808Abstract: A connector has data signal conductors for communicating data signals and voltage reference (power and ground) conductors for the signals' return currents. Voltage reference conductors carrying the same voltage level are coupled together at one or more points between the ends of the connector to shift the connector's resonant frequency beyond an operating frequency range of the data signals. Decoupling capacitors may alternatively or additionally be inserted between pairs of voltage reference conductors carrying high and low voltage levels at one or more points between the ends of the connector to shift the connector's resonant frequency beyond an operating frequency range of the data signals.Type: GrantFiled: August 20, 2008Date of Patent: June 15, 2010Assignee: Hirose ElectricInventors: Ching-Chao Huang, Gong-Jong Yeh, Clement Kam Lam Luk, Tatsuya Arai
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Publication number: 20100117572Abstract: 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 basType: ApplicationFiled: March 28, 2008Publication date: May 13, 2010Inventors: Tomomi Harada, Tatsuya Arai
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Publication number: 20100076326Abstract: The systems and methods described herein enable reliable estimation of cardiovascular indices on real-time, non-invasive or minimally-invasive, and beat-to-beat basis. Cardiovascular indices which can be estimated include), stroke volume (SV), without being limited to, cardiac output (CO and total peripheral resistance (TPR). In various embodiments, one or more of these indices are estimated continuously, on a beat-to-beat basis, using peripheral arterial blood pressure (ABP) waveforms and certain parameters derived from the peripheral ABP waveforms. The derived parameters are substantially insensitive to distortions of the ABP waveform arising from tapered arterial branches throughout the arterial tree. The methods described herein can provide a more accurate and reliable estimate of hemodynamic parameters than existing techniques.Type: ApplicationFiled: September 21, 2009Publication date: March 25, 2010Inventors: Richard Jonathan Cohen, Kichang Lee, Tatsuya Arai
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Publication number: 20100045408Abstract: A connector has data signal conductors for communicating data signals and voltage reference (power and ground) conductors for the signals' return currents. Voltage reference conductors carrying the same voltage level are coupled together at one or more points between the ends of the connector to shift the connector's resonant frequency beyond an operating frequency range of the data signals. Decoupling capacitors may alternatively or additionally be inserted between pairs of voltage reference conductors carrying high and low voltage levels at one or more points between the ends of the connector to shift the connector's resonant frequency beyond an operating frequency range of the data signals.Type: ApplicationFiled: August 20, 2008Publication date: February 25, 2010Inventors: Ching-Chao Huang, Gong-Jong Yeh, Clement Kam Lam Luk, Tatsuya Arai