Patents by Inventor Akihiro Ikeda
Akihiro Ikeda 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: 11959197Abstract: A first aspect of the present invention is carbon fiber wherein the surface of a monofilament has a center line average roughness Ra of 6.0 nm or more and 13 nm or less, and the monofilament has a long diameter/short diameter ratio of 1.11 or more and 1.245 or less. A second aspect of the present invention is carbon fiber precursor acrylic fiber wherein the surface of a monofilament has a center line average roughness Ra of 18 nm or more and 27 nm or less, and the monofilament has a long diameter/short diameter ratio of 1.11 or more and 1.245 or less. The carbon fiber according to the first aspect is obtained by stabilizing and carbonizing under specific conditions the carbon fiber precursor acrylic fiber according to the second aspect.Type: GrantFiled: August 15, 2019Date of Patent: April 16, 2024Assignee: Mitsubishi Chemical CorporationInventors: Naomasa Matsuyama, Yuutarou Nakamura, Norifumi Hirota, Hiroko Matsumura, Katsuhiko Ikeda, Kouki Wakabayashi, Tadashi Ootani, Akihiro Itou, Kenji Hirano, Akito Hatayama, Kenji Kaneta, Atsushi Nakajima
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Publication number: 20240121497Abstract: A small light-emitting device is provided. A light-emitting device which is less likely to produce a shadow is provided. A structure including a switching circuit for supplying a pulsed constant current and a light-emitting panel supplied with the pulsed constant current has been conceived.Type: ApplicationFiled: December 1, 2023Publication date: April 11, 2024Applicant: Semiconductor Energy Laboratory Co., Ltd.Inventors: Yoshiharu HIRAKATA, Nobuharu OHSAWA, Hisao IKEDA, Kazuhiko FUJITA, Akihiro KAITA
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Publication number: 20240093016Abstract: Provided is a technique of obtaining films with higher dielectric breakdown strength at high temperatures and folding resistance. A resin composition comprises (1) a syndiotactic polystyrene resin, (2) a polyphenylene ether resin, and (3) at least one member selected from the group consisting of styrene-based thermoplastic elastomers and atactic polystyrene resins, wherein the content of the polyphenylene ether resin in the resin composition is 6 mass % or more.Type: ApplicationFiled: October 7, 2020Publication date: March 21, 2024Applicant: Oji Holdings CorporationInventors: Takumi SUEI, Kazuo IKEDA, Akihiro KAKEHI
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Patent number: 11927239Abstract: A balancer structure for an internal combustion engine and the internal combustion engine are provided. A transmission driving gear are arranged to be rotatable integrally with a crankshaft. A transmission driven gear is arranged to be rotatable integrally with a first balance shaft. The transmission driven gear meshes with the transmission driving gear. A balancer driving gear is arranged to be rotatable integrally with the first balance shaft. A balancer driven gear is arranged to be rotatable integrally with the second balance shaft. The balancer driven gear meshes with the balancer driving gear. The first balance shaft includes an output portion. The output portion outputs torque to an engine-driven accessory.Type: GrantFiled: March 1, 2023Date of Patent: March 12, 2024Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Akihiro Ikeda, Yoshitomo Mizuta, Hiroaki Ikegami
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Publication number: 20230332670Abstract: A balancer structure for an internal combustion engine and the internal combustion engine are provided. A transmission driving gear are arranged to be rotatable integrally with a crankshaft. A transmission driven gear is arranged to be rotatable integrally with a first balance shaft. The transmission driven gear meshes with the transmission driving gear. A balancer driving gear is arranged to be rotatable integrally with the first balance shaft. A balancer driven gear is arranged to be rotatable integrally with the second balance shaft. The balancer driven gear meshes with the balancer driving gear. The first balance shaft includes an output portion. The output portion outputs torque to an engine-driven accessory.Type: ApplicationFiled: March 1, 2023Publication date: October 19, 2023Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Akihiro IKEDA, Yoshitomo MIZUTA, Hiroaki IKEGAMI
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Patent number: 11302509Abstract: An electron gun includes an emitter, an electron gun electrode, and a short-circuiting mechanism for setting the emitter and the electron gun electrode at the same potential. The short-circuiting mechanism includes a first switch member provided with a first switch electrode that is connected to the emitter and a second switch electrode that is connected to the electron gun electrode, a second switch member provided with a third switch electrode, and a drive unit that operates at least one of the first switch member and the second switch member to switch between a state in which the first switch electrode and the second switch electrode are in contact with the third switch electrode and a state in which the first switch electrode and the second switch electrode are separated from the third switch electrode. The short-circuiting mechanism has the same potential as a predetermined voltage.Type: GrantFiled: September 6, 2018Date of Patent: April 12, 2022Assignee: JEOL Ltd.Inventors: Akihiro Ikeda, Norikazu Arima
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Patent number: 10629438Abstract: The laser doping apparatus may irradiate a predetermined region of a semiconductor material with a pulse laser beam to perform doping. The laser doping apparatus may include: a solution supplying system configured to supply dopant-containing solution to the predetermined region, and a laser system including at least one laser device configured to output the pulse laser beam to be transmitted by the dopant-containing solution, and a time-domain pulse waveform changing apparatus configured to control a time-domain pulse waveform of the pulse laser beam.Type: GrantFiled: April 24, 2019Date of Patent: April 21, 2020Assignees: Kyushu University, Gigaphoton Inc.Inventors: Tomoyuki Ohkubo, Hiroshi Ikenoue, Akihiro Ikeda, Tanemasa Asano, Osamu Wakabayashi
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Publication number: 20190252190Abstract: The laser doping apparatus may irradiate a predetermined region of a semiconductor material with a pulse laser beam to perform doping. The laser doping apparatus may include: a solution supplying system configured to supply dopant-containing solution to the predetermined region, and a laser system including at least one laser device configured to output the pulse laser beam to be transmitted by the dopant-containing solution, and a time-domain pulse waveform changing apparatus configured to control a time-domain pulse waveform of the pulse laser beam.Type: ApplicationFiled: April 24, 2019Publication date: August 15, 2019Applicants: Kyushu University, Gigaphoton Inc.Inventors: Tomoyuki OHKUBO, Hiroshi IKENOUE, Akihiro IKEDA, Tanemasa ASANO, Osamu WAKABAYASHI
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Publication number: 20190080878Abstract: An electron gun includes an emitter, an electron gun electrode, and a short-circuiting mechanism for setting the emitter and the electron gun electrode at the same potential. The short-circuiting mechanism includes a first switch member provided with a first switch electrode that is connected to the emitter and a second switch electrode that is connected to the electron gun electrode, a second switch member provided with a third switch electrode, and a drive unit that operates at least one of the first switch member and the second switch member to switch between a state in which the first switch electrode and the second switch electrode are in contact with the third switch electrode and a state in which the first switch electrode and the second switch electrode are separated from the third switch electrode. The short-circuiting mechanism has the same potential as a predetermined voltage.Type: ApplicationFiled: September 6, 2018Publication date: March 14, 2019Inventors: Akihiro Ikeda, Norikazu Arima
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Publication number: 20170365475Abstract: The laser doping apparatus may irradiate a predetermined region of a semiconductor material with a pulse laser beam to perform doping. The laser doping apparatus may include: a solution supplying system configured to supply dopant-containing solution to the predetermined region, and a laser system including at least one laser device configured to output the pulse laser beam to be transmitted by the dopant-containing solution, and a time-domain pulse waveform changing apparatus configured to control a time-domain pulse waveform of the pulse laser beam.Type: ApplicationFiled: August 16, 2017Publication date: December 21, 2017Applicants: Kyushu University, Gigaphoton Inc.Inventors: Tomoyuki OHKUBO, Hiroshi IKENOUE, Akihiro IKEDA, Tanemasa ASANO, Osamu WAKABAYASHI
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Patent number: 9828934Abstract: An iron-based sprayed coating for coating a bore inner surface of a cylinder block for an internal combustion engine. A coating surface contains pits, its pit amount is within a range of 0.01% to 2.1%, and an average roughness Ra of this coating surface is within a range of 0.01 ?m to 0.15 ?m. The cylinder block for an internal combustion engine includes a bore having this iron-based sprayed coating on its inner surface, and a cylinder block body having the bore. A sliding mechanism for an internal combustion engine includes this cylinder block for an internal combustion engine and a piston slidable with the bore of this cylinder block. The piston has a piston ring, and the piston ring has a chromium coating, a chromium nitride coating, or a diamond-like carbon coating at a sliding part with the bore.Type: GrantFiled: May 19, 2014Date of Patent: November 28, 2017Assignee: NISSAN MOTOR CO., LTD.Inventors: Takahiro Hamada, Akihiro Ikeda, Masaya Nakajima, Nobuhiko Satou
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Patent number: 9828900Abstract: Provided is a valve housing configured to be inserted into an insertion hole that extends in a direction approximately orthogonal to an extending direction of an oil path and configured to be freely movable along an extending direction of the insertion hole. When an oil jet switching valve is closed, the tip end portion of the valve housing is configured to be pressed to the inner wall surface of the oil path by receiving an energized force from an energizing unit.Type: GrantFiled: August 28, 2013Date of Patent: November 28, 2017Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN SEIKI KABUSHIKI KAISHAInventors: Shinya Takasaki, Akihiro Ikeda, Eiji Miyachi
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Patent number: 9659775Abstract: Impurity elements are doped at a high concentration exceeding a thermodynamic equilibrium concentration into a solid material having an extremely small diffusion coefficient of the impurity element. A method for doping impurities includes steps for depositing source film made of material containing impurity elements with a film thickness on a surface of a solid target object (semiconductor substrate) made from the solid material. The film thickness is determined in consideration of irradiation time per light pulse and the energy density of the light pulse. The method also includes a step for irradiating the source film by the light pulse with the irradiation time and the energy density so as to dope the impurity elements into the target object at a concentration exceeding a thermodynamic equilibrium concentration.Type: GrantFiled: February 24, 2016Date of Patent: May 23, 2017Assignees: FUJI ELECTRIC CO., LTD., KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATIONInventors: Akihiro Ikeda, Hiroshi Ikenoue, Tanemasa Asano, Kenichi Iguchi, Haruo Nakazawa, Koh Yoshikawa, Yasukazu Seki
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Publication number: 20160247681Abstract: Impurity elements are doped at a high concentration exceeding a thermodynamic equilibrium concentration into a solid material having an extremely small diffusion coefficient of the impurity element. A method for doping impurities includes steps for depositing source film made of material containing impurity elements with a film thickness on a surface of a solid target object (semiconductor substrate) made from the solid material. The film thickness is determined in consideration of irradiation time per light pulse and the energy density of the light pulse. The method also includes a step for irradiating the source film by the light pulse with the irradiation time and the energy density so as to dope the impurity elements into the target object at a concentration exceeding a thermodynamic equilibrium concentration.Type: ApplicationFiled: February 24, 2016Publication date: August 25, 2016Applicants: KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION, FUJI ELECTRIC CO., LTD.Inventors: Akihiro IKEDA, Hiroshi Ikenoue, Tanemasa Asano, Kenichi Iguchi, Haruo Nakazawa, Koh Yoshikawa, Yasukazu Seki
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Patent number: 9396713Abstract: A music box includes a bedplate, a plurality of projections, a driving mechanism, an enclosure, a first member, and a second member. The bedplate is fixedly provided with a plurality of vibration reeds. One or more projections are provided to correspond to each of the plurality of vibration reeds. The driving mechanism is configured to drive the plurality of projections. The enclosure accommodates therein the bedplate and the driving mechanism and comprising a resonant plate. The first member is fixed to the resonant plate of the enclosure and the bedplate accommodated in the enclosure. The second member is provided between the driving mechanism and the enclosure.Type: GrantFiled: June 26, 2014Date of Patent: July 19, 2016Assignee: BROTHER KOGYO KABUSHIKI KAISHAInventor: Akihiro Ikeda
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Publication number: 20160177863Abstract: An iron-based sprayed coating for coating a bore inner surface of a cylinder block for an internal combustion engine. A coating surface contains pits, its pit amount is within a range of 0.01% to 2.1%, and an average roughness Ra of this coating surface is within a range of 0.01 ?m to 0.15 ?m. The cylinder block for an internal combustion engine includes a bore having this iron-based sprayed coating on its inner surface, and a cylinder block body having the bore. A sliding mechanism for an internal combustion engine includes this cylinder block for an internal combustion engine and a piston slidable with the bore of this cylinder block. The piston has a piston ring, and the piston ring has a chromium coating, a chromium nitride coating, or a diamond-like carbon coating at a sliding part with the bore.Type: ApplicationFiled: May 19, 2013Publication date: June 23, 2016Applicant: NISSAN MOTOR CO., LTD.Inventors: Takahiro HAMADA, Akihiro IKEDA, Masaya NAKAJIMA, Nobuhiko SATOU
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Patent number: 9228522Abstract: In a multicylinder internal combustion engine including a turbocharger, the turbocharger employs a twin-entry turbo where a turbine includes two exhaust gas inflow ports. A first exhaust passage guides an exhaust gas discharged from a first cylinder group of the internal combustion engine to one exhaust gas inflow port of the turbocharger. A second exhaust passage guides an exhaust gas discharged from a second cylinder group of the internal combustion engine to the other exhaust gas inflow port of the turbocharger. An exhaust gas collecting portion of the first exhaust passage and an exhaust gas collecting portion of the second exhaust passage each include an air-fuel ratio sensor. This configuration allows efficiently contact of the exhaust gas on an element portion of the air-fuel ratio sensor, thus accurately detecting an air-fuel ratio of the exhaust gas at an upstream side of a catalyst for each cylinder.Type: GrantFiled: January 18, 2011Date of Patent: January 5, 2016Assignee: Toyota Jidosha Kabushiki KaishaInventors: Kunihiko Sakata, Akihiro Ikeda
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Publication number: 20150292390Abstract: Provided is a valve housing configured to be inserted into an insertion hole that extends in a direction approximately orthogonal to an extending direction of an oil path and configured to be freely movable along an extending direction of the insertion hole. When an oil jet switching valve is closed, the tip end portion of the valve housing is configured to be pressed to the inner wall surface of the oil path by receiving an energized force from an energizing unit.Type: ApplicationFiled: August 28, 2013Publication date: October 15, 2015Applicants: AISIN SEIKI KABUSHIKI KAISHA, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shinya Takasaki, Akihiro Ikeda, Eiji Miyachi
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Patent number: 9053686Abstract: A music box includes a plurality of star wheels, a frame, a casing, a vibration plate, and a moving mechanism. Each of the plurality of star wheels being configured to rotate about a first axis. The frame is configured to rotatably support the first axis. The vibration plate comprises a plurality of vibration valves corresponding to the plurality of star wheels. Each of the plurality of vibration valves is extending in a first direction. The plurality of vibration valves is arrayed along a second direction parallel to the first axis. The vibration plate is fixed to the casing. The moving mechanism is configured to move the frame to the vibration plate in the first direction.Type: GrantFiled: January 13, 2014Date of Patent: June 9, 2015Assignee: BROTHER KOGYO KABUSHIKI KAISHAInventors: Akihiro Ikeda, Yasuhiro Shibata
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Patent number: 9012749Abstract: A music box includes a plurality of star wheels, a plurality of vibration valves, a plurality of anchoring members, a plurality of electromagnets, and a control unit. The control unit is configured to control one or more of the plurality of the electromagnets to be a first state by supplying a first electricity and control each of the plurality of electromagnets to be a second state by supplying a second electricity. Each of the plurality of anchoring members is configured to engage with one of the plurality of protruding parts in the second state. The one or more of the plurality of anchoring members is configured to rotate about a second axis extending parallel to a first axis in the first state, and the one or more of the plurality of anchoring members is positioned remote from the electromagnet with a gap therebetween in the first state.Type: GrantFiled: January 13, 2014Date of Patent: April 21, 2015Assignee: Brother Kogyo Kabushiki KaishaInventor: Akihiro Ikeda