Patents by Inventor Motoo Nakai
Motoo Nakai 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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Publication number: 20240017242Abstract: The present invention relates to a thermal insulator containing a polymer sorbent that regenerates by desorbing adsorbed moisture, and a thermal insulation material. The thermal insulator of the present invention has the thermal insulation performance and prevents deterioration of the object by repeatedly absorbing liquid water between the object to be thermally insulated and the thermal insulator to reduce and prevent retention of water droplets between an object to be thermally insulated and a thermal insulator.Type: ApplicationFiled: November 2, 2021Publication date: January 18, 2024Applicants: JTEKT CORPORATION, NATIONAL UNIVERSITY CORPORATION TOKAI NATIONAL HIGHER EDUCATION AND RESEARCH SYSTEMInventors: Toshiyuki SAITO, Kenichi RYUGO, Motoo NAKAI, Kazuki NAKANISHI
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Patent number: 11804610Abstract: A fuel cell system having a direct liquid fuel cell that uses a liquid containing a formic acid or an alcohol as a fuel includes: a fuel tank that stores the fuel to be supplied to the fuel cell; a fuel supply device that supplies the fuel in the fuel tank to the fuel cell; and a bubbling device that blows an inert gas into the fuel stored in the fuel tank.Type: GrantFiled: October 23, 2020Date of Patent: October 31, 2023Assignees: JTEKT CORPORATION, NATIONAL UNIVERSITY CORPORATION KANAZAWA UNIVERSITYInventors: Takuya Tsujiguchi, Yasuhide Takeda, Atsushi Kubo, Akihiro Takazato, Toshiyuki Saito, Motoo Nakai, Yusuke Ueda
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Publication number: 20230327145Abstract: A fuel flow groove formed in a fuel electrode current collector of a fuel electrode of a fuel cell includes a plurality of flow groove portions disposed in parallel, and a plurality of return groove portions connecting an end portion of one side edge portion or an end portion of the other side edge portion of the flow groove portions of two adjacent groups. Each of the return groove portions has an inner wall surface portion facing the end portion of the flow groove portions in the return groove portions. The inner wall surface portion has a curved surface shape in which a distance facing each other from the inner wall surface portion to the end portion of the flow groove portions, gradually decreases toward both end portions of the inner side wall surface portion in a direction orthogonal to an extending direction of the flow groove portions.Type: ApplicationFiled: October 14, 2020Publication date: October 12, 2023Applicants: JTEKT CORPORATION, NATIONAL UNIVERSITY CORPORATION KANAZAWA UNIVERSITYInventors: Takuya TSUJIGUCHI, Noriyasu HAYASHI, Toshiyuki SAITO, Motoo NAKAI, Atsushi KUBO, Akihiro TAKAZATO
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Publication number: 20230275243Abstract: A fuel cell includes a discharge structure that discharges water generated in a cathode electrode in association with an electrode reaction in the MEA to the outside. The discharge structure includes a discharge path through which air that is an oxidant flows, a passage that communicably connects an oxidant supply flow path and the discharge path and that moves water generated in the cathode electrode to the discharge path, and a discharge portion that discharges the generated water moved to the discharge path to the outside.Type: ApplicationFiled: August 25, 2021Publication date: August 31, 2023Applicants: JTEKT CORPORATION, NATIONAL UNIVERSITY CORPORATION KANAZAWA UNIVERSITYInventors: Takuya TSUJIGUCHI, Yasuhide TAKEDA, Motoo NAKAI, Toshiyuki SAITO, Atsushi KUBO, Mototake FURUHASHI, Ayumi NAKASONE, Atsushi NAKANE, Fumitaka ACHIWA
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Patent number: 11649918Abstract: There is provided a flow pipe including: a pipe body including a side wall having an opening portion; and a heat insulator arranged at an inner peripheral side of the pipe body and having a flow path through which a fluid flows. The heat insulator has an outer peripheral surface facing with the side wall, and the outer peripheral surface has a flow path structure configured to form a flow path that guides a water droplet generated between the heat insulator and the pipe body to the opening portion.Type: GrantFiled: July 14, 2021Date of Patent: May 16, 2023Assignee: JTEKT CORPORATIONInventors: Kenichi Ryugo, Toshiyuki Saito, Motoo Nakai, Yoshiaki Ando
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Publication number: 20220393200Abstract: A fuel cell system having a direct liquid fuel cell that uses a liquid containing a formic acid or an alcohol as a fuel includes: a fuel tank that stores the fuel to be supplied to the fuel cell; a fuel supply device that supplies the fuel in the fuel tank to the fuel cell; and a bubbling device that blows an inert gas into the fuel stored in the fuel tank.Type: ApplicationFiled: October 23, 2020Publication date: December 8, 2022Applicants: JTEKT CORPORATION, NATIONAL UNIVERSITY CORPORATION KANAZAWA UNIVERSITYInventors: Takuya TSUJIGUCHI, Yasuhide TAKEDA, Atsushi KUBO, Akihiro TAKAZATO, Toshiyuki SAITO, Motoo NAKAI, Yusuke UEDA
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Publication number: 20220034443Abstract: There is provided a flow pipe including: a pipe body including a side wall having an opening portion; and a heat insulator arranged at an inner peripheral side of the pipe body and having a flow path through which a fluid flows. The heat insulator has an outer peripheral surface facing with the side wall, and the outer peripheral surface has a flow path structure configured to form a flow path that guides a water droplet generated between the heat insulator and the pipe body to the opening portion.Type: ApplicationFiled: July 14, 2021Publication date: February 3, 2022Applicant: JTEKT CORPORATIONInventors: Kenichi RYUGO, Toshiyuki SAITO, Motoo NAKAI, Yoshiaki ANDO
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Publication number: 20200124363Abstract: A heat recovery system includes a plurality of heat source portions; a heat exchanger connected to the heat source portions via a primary flow path portion through which a first fluid flows, and configured to perform heat exchange between the first fluid and a second fluid; a valve mechanism configured to select a flow path that connects the heat exchanger and the heat source portions; and a power generation unit connected to the heat exchanger via a secondary flow path portion through which the second fluid flows, and configured to generate electric power using the second fluid. Timing of a temperature rise of the first fluid in one heat source portion is different from that in another heat source portion. The valve mechanism operates in accordance with the timing of the temperature rise of the first fluid in each of the heat source portions.Type: ApplicationFiled: October 17, 2019Publication date: April 23, 2020Applicants: JTEKT CORPORATION, Koyo Thermo Systems Co., Ltd.Inventors: Yusuke UEDA, Motoo NAKAI, Amane MATSUBARA, Yasuyuki WAKITA, Yasuhiro MORIMOTO, Yasuhiro ENDO, Akio MORI
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Patent number: 9893642Abstract: A power module includes a multilayer circuit board, and first and second three-phase inverters, which are mounted on the multilayer circuit board to be stacked each other. A positive-electrode-side power source conductive trace of the first three-phase inverter and a negative-electrode-side power source conductive trace of the second three-phase inverter are disposed to at least partially face each other in a stacking direction of the multilayer circuit board, such that currents respectively flow through the power source conductive traces in opposite directions in a facing section. A negative-electrode-side power source conductive trace of the first three-phase inverter and a positive-electrode-side power source conductive trace of the second three-phase inverter are disposed to at least partially face each other in the stacking direction of the multilayer circuit board), such that currents respectively flow through the power source conductive traces in opposite directions in a facing section.Type: GrantFiled: May 22, 2017Date of Patent: February 13, 2018Assignee: JTEKT CORPORATIONInventors: Nobuhiro Uchida, Motoo Nakai
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Publication number: 20170353119Abstract: A power module includes a multilayer circuit board, and first and second three-phase inverters, which are mounted on the multilayer circuit board to be stacked each other. A positive-electrode-side power source conductive trace of the first three-phase inverter and a negative-electrode-side power source conductive trace of the second three-phase inverter are disposed to at least partially face each other in a stacking direction of the multilayer circuit board, such that currents respectively flow through the power source conductive traces in opposite directions in a facing section. A negative-electrode-side power source conductive trace of the first three-phase inverter and a positive-electrode-side power source conductive trace of the second three-phase inverter are disposed to at least partially face each other in the stacking direction of the multilayer circuit board), such that currents respectively flow through the power source conductive traces in opposite directions in a facing section.Type: ApplicationFiled: May 22, 2017Publication date: December 7, 2017Applicant: JTEKT CORPORATIONInventors: Nobuhiro UCHIDA, Motoo NAKAI
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Publication number: 20160351469Abstract: In a semiconductor device, a first to a sixth switching elements are joined to a second main surface of a substrate with their electrode surfaces facing the second main surface of the substrate. Non-electrode surfaces of the switching elements are provided with respective heat spreaders joined thereto. Each of the heat spreaders is constituted of a heat spreader main body and a pair of standing portions. The heat spreader main body is formed in a cuboid having rectangular flat surfaces that are elongated in one direction. The standing portions are standing on both edges of a surface of the heat spreader main body.Type: ApplicationFiled: May 20, 2016Publication date: December 1, 2016Applicant: JTEKT CORPORATIONInventors: Takahito HIEDA, Motoo NAKAI, Nobuhiro UCHIDA, Naoki TANI
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Patent number: 9293970Abstract: A control device of a motor unit has a gear housing having a supporting wall portion, a ceramic portion formed on the supporting wall portion, a circuit board body fixed to the ceramic portion, a power element located inside the circuit board body, and a load receiving member that is located around the power element inside the circuit board body and receives a load applied to the circuit board body.Type: GrantFiled: September 12, 2013Date of Patent: March 22, 2016Assignee: JTEKT CORPORATIONInventors: Motoo Nakai, Yasuyuki Wakita
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Patent number: 9066429Abstract: A circuit board includes control circuit patterns and first drive circuit patterns. A base maintains the circuit board in a state in which the base is opposed to a portion of the circuit board, in which the control circuit patterns are formed, across a space that allows control circuit elements to be mounted at the circuit board. A line module includes second drive circuit patterns electrically connected to the first drive circuit patterns so as to constitute a part of lines of a drive circuit, and is sandwiched between a portion of the circuit board, in which the first drive circuit patterns are formed, and the base.Type: GrantFiled: October 17, 2013Date of Patent: June 23, 2015Assignee: JTEKT CORPORATIONInventors: Shigeki Nagase, Motoo Nakai
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Patent number: 9038764Abstract: A motor control circuit includes a power relay, a converter division, a smoothing condenser, a control circuit and a motor drive circuit, and is connected to a battery as high voltage power and to an electrical motor. The battery is connected with a driving battery having the high voltage such as 288V etc. A step down circuit reduces the high voltage to a low voltage such as 36V etc., charges a low voltage charge device and supplies drive power to the motor drive circuit. When the vehicle collision is occurred, the control circuit detects the collision by a value of detected acceleration, a power change relay is turned on to change to the power source from the low voltage charge device after voltage of the smoothing condenser is reduced, thereby connecting the low voltage to the motor drive circuit.Type: GrantFiled: December 9, 2013Date of Patent: May 26, 2015Assignee: JTEKT CORPORATIONInventor: Motoo Nakai
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Publication number: 20140174844Abstract: A motor control circuit includes a power relay, a converter division, a smoothing condenser, a control circuit and a motor drive circuit, and is connected to a battery as high voltage power and to an electrical motor. The battery is connected with a driving battery having the high voltage such as 288V etc. A step down circuit reduces the high voltage to a low voltage such as 36V etc., charges a low voltage charge device and supplies drive power to the motor drive circuit. When the vehicle collision is occurred, the control circuit detects the collision by a value of detected acceleration, a power change relay is turned on to change to the power source from the low voltage charge device after voltage of the smoothing condenser is reduced, thereby connecting the low voltage to the motor drive circuit.Type: ApplicationFiled: December 9, 2013Publication date: June 26, 2014Applicant: JTEKT CORPORATIONInventor: Motoo NAKAI
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Publication number: 20140116798Abstract: A circuit board includes control circuit patterns and first drive circuit patterns. A base maintains the circuit board in a state in which the base is opposed to a portion of the circuit board, in which the control circuit patterns are formed, across a space that allows control circuit elements to be mounted at the circuit board. A line module includes second drive circuit patterns electrically connected to the first drive circuit patterns so as to constitute a part of lines of a drive circuit, and is sandwiched between a portion of the circuit board, in which the first drive circuit patterns are formed, and the base.Type: ApplicationFiled: October 17, 2013Publication date: May 1, 2014Applicant: JTEKT CORPORATIONInventors: Shigeki NAGASE, Motoo NAKAI
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Patent number: 8689926Abstract: An electric power steering apparatus (1) comprises a control device (12), which controls driving of an electric motor (18) based on the detection signals from a rotational position-detecting sensor (72; 72A), which detects the rotational position of the rotor (64) of the electric motor (18), and a steering status detecting sensor (11; 11A). The control device (12) is housed in a housing (100) that is partitioned by a first housing (23), which is at least a portion of the motor housing (25) for the electric motor (18), and a second housing (24; 24A; 24B) that touches the first housing (23). At least one of the rotational position-detecting sensor (72; 72A) and steering state detecting sensor (11; 11A) is connected to the control device (12) by means of only a signal wire (81; 134) inside the first housing (23) or the second housing (24; 24A; 24B).Type: GrantFiled: February 6, 2009Date of Patent: April 8, 2014Assignee: JTEKT CorporationInventors: Shigeki Nagase, Shiro Nakano, Ken Matsubara, Motoo Nakai, Kunihiro Oka, Naotake Kanda, Nobuhiro Uchida, Kouya Yoshida, Minoru Sentoku
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Patent number: 8681506Abstract: A motor control device comprising a control board for controlling driving of an electric motor, the control board including a multilayer circuit board having inner layers and outer layers, a ground pattern disposed around an output shaft of the electric motor formed on one of the inner layers, and a severed portion formed on a part of the ground pattern, so as to sever through the ground pattern in a radial direction of the output shaft. The construction reduces noise from the motor control device.Type: GrantFiled: February 2, 2009Date of Patent: March 25, 2014Assignees: JTEKT Corporation, Koyo Electronics Industries Co., Ltd.Inventors: Motoo Nakai, Shigeki Nagase, Akira Sugimoto
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Publication number: 20140077638Abstract: A control device of a motor unit has a gear housing having a supporting wall portion, a ceramic portion formed on the supporting wall portion, a circuit board body fixed to the ceramic portion, a power element located inside the circuit board body, and a load receiving member that is located around the power element inside the circuit board body and receives a load applied to the circuit board body.Type: ApplicationFiled: September 12, 2013Publication date: March 20, 2014Applicant: JTEKT CORPORATIONInventors: Motoo NAKAI, Yasuyuki WAKITA
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Publication number: 20140021833Abstract: A motor unit includes an electric motor that has a motor bracket that is fixed to an end portion of a motor housing that houses a rotor and a stator; a gear housing fixed to the motor bracket; and a circuit board that controls driving of the electric motor. The circuit board is wrapped on an outer face of a side wall of the gear housing.Type: ApplicationFiled: July 5, 2013Publication date: January 23, 2014Inventors: Motoo NAKAI, Yasuyuki WAKITA