Patents by Inventor Yu HIRAI
Yu HIRAI 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: 11951737Abstract: A distance between the first circuit and the second circuit is a first distance, a distance between the first circuit and the temperature detection circuit is a second distance longer than the first distance, and a distance between the second circuit and the temperature detection circuit is a third distance longer than the first distance.Type: GrantFiled: July 13, 2022Date of Patent: April 9, 2024Assignee: Seiko Epson CorporationInventors: Shoichiro Yokoo, Noritaka Ide, Eiju Hirai, Masaki Mori, Yu Shiozawa
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Publication number: 20240114618Abstract: A circuit board unit includes a first circuit board having a first ground layer, a second circuit board having a second ground layer and arranged so as to be opposed to the first circuit board, a connector unit having a first connector attached to the first circuit board, and a second connector attached to the second circuit board and coupled to the first connector, and a metal member arranged between the first circuit board and the second circuit board, and configured to electrically couple the first ground layer and the second ground layer to each other. The metal member is arranged so as to be adjacent to the connector unit.Type: ApplicationFiled: September 28, 2023Publication date: April 4, 2024Applicant: SEIKO EPSON CORPORATIONInventors: Yu MASAGO, Toshiyuki OMORI, Masaaki ITO, Takeshi HIRAI
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Publication number: 20240066868Abstract: A liquid ejecting head includes: a nozzle substrate having a nozzle configured to eject liquid; a pressure chamber substrate having a pressure chamber in which a pressure for ejecting liquid through the nozzle is applied to liquid and an absorption chamber adjacent to an upstream portion of the pressure chamber and configured to absorb vibration of liquid that occurs when a pressure is applied to the liquid in the pressure chamber; a first piezoelectric element associated with the pressure chamber and configured to be driven by voltage application; and a second piezoelectric element associated with the absorption chamber and configured to be driven independently of the first piezoelectric element by voltage application.Type: ApplicationFiled: August 29, 2023Publication date: February 29, 2024Inventors: Yu SHIOZAWA, Hitoshi TAKAAI, Takahiro KANEGAE, Eiju HIRAI
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Publication number: 20240066861Abstract: a first compliance portion provided at a position on the first side of a coupling area in the common flow path where the common flow path is coupled to the plurality of individual flow paths; and a second compliance portion, different from the first compliance portion, provided at a position on a second side of the coupling area in the common flow path, the second side being the other side in the second direction and being opposite to the first side, and the first compliance portion and the second compliance portion have an overlapping portion where the first compliance portion and the second compliance portion partially overlap each other as viewed in the second direction.Type: ApplicationFiled: August 29, 2023Publication date: February 29, 2024Inventors: Yu SHIOZAWA, Hitoshi TAKAAI, Motoki TAKABE, Eiju HIRAI, Takahiro KANEGAE
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Publication number: 20230179043Abstract: A rotor core includes: a bypass barrier which is a nonmagnetic region provided on the q-axis; a first magnet provided in a region of the rotor core that is closer to the d-axis than the q-axis is; and a second magnet at least a portion of which is provided in a region, of the rotor core, on a radially inner side relative to the first magnet. The second magnet is provided in a region of the rotor core that is closer to the q-axis than the first magnet is. An end point of the second magnet that is closest to the q-axis is located on the radially inner side, in the rotor core, relative to a radially innermost surface which is a surface on a radially innermost side of the bypass barrier.Type: ApplicationFiled: March 5, 2021Publication date: June 8, 2023Applicant: Mitsubishi Electric CorporationInventors: Junji KITAO, Yu HIRAI
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Patent number: 11215274Abstract: A lubrication mechanism for a vehicle drive-force transmitting apparatus including; first and second gears meshing with each other in a meshing region; and a casing storing therein the first and second gears. The lubrication mechanism includes a gutter that extends from an inner wall surface such that oil is received in the gutter and is then dropped from an end of the gutter. The gutter includes a flow-direction changing rib with which the received oil is to be collided whereby a flow direction of the received oil is changed to a direction toward the end of the gutter. The end of the gutter is located on upper side of the meshing region, between first and second vertical planes containing respective first and second axes about which the first and second gears to be rotated, and is located between opposite ends of the meshing region.Type: GrantFiled: March 17, 2020Date of Patent: January 4, 2022Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Seitaro Nobuyasu, Yu Hirai, Atsushi Kawamoto, Shigetsugu Iwata, Yuki Katayama, Kazuaki Kamiya
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Publication number: 20200332881Abstract: A lubrication mechanism for a vehicle drive-force transmitting apparatus including; first and second gears meshing with each other in a meshing region; and a casing storing therein the first and second gears. The lubrication mechanism includes a gutter that extends from an inner wall surface such that oil is received in the gutter and is then dropped from an end of the gutter. The gutter includes a flow-direction changing rib with which the received oil is to be collided whereby a flow direction of the received oil is changed to a direction toward the end of the gutter. The end of the gutter is located on upper side of the meshing region, between first and second vertical planes containing respective first and second axes about which the first and second gears to be rotated, and is located between opposite ends of the meshing region.Type: ApplicationFiled: March 17, 2020Publication date: October 22, 2020Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Seitaro Nobuyasu, Yu Hirai, Atsushi Kawamoto, Shigetsugu Iwata, Yuki Katayama, Kazuaki Kamiya
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Publication number: 20200157983Abstract: It is provided an electric oil pump system and a controlling method of an electric oil pump. The electric oil pump system includes an electric oil pump and an electronic control unit. The electronic control unit is configured to accumulate driving time of the electric oil pump, predict driving time of the electric oil pump that will occur in the future, and determine degradation of the electric oil pump by taking into account an accumulated driving time and a predicted driving time.Type: ApplicationFiled: November 8, 2019Publication date: May 21, 2020Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Yu HIRAI
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Publication number: 20200026210Abstract: A toner is provided. The toner comprises a binder resin, a metal-containing azo dye, and a quaternary ammonium salt, has an average circularity of from 0.85 to 0.95, and is free of a tin compound having Sn—C bond.Type: ApplicationFiled: April 30, 2019Publication date: January 23, 2020Inventors: Yu HIRAI, Masayuki Ishii, Hyo Shu, Masayuki Kakimoto, Yoshitaka Sekiguchi, Shohta Kobayashi, Shinya Hanatani, Kohtaroh Ogino, Yasuaki Iwamoto
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Patent number: 9806572Abstract: A rotor 14 includes a shaft having a coolant flow passage and a coolant supply port, a rotor core 24 fixed on the shaft and formed of laminated steel plates, and a magnet set 32 provided in the rotor core 24 to extend along an axial direction thereof. The rotor core 24 has a first flow passage 34 provided near the magnet to extend therealong and a second flow passage 36 that connects the coolant supply port 28 of the shaft 22 and the first flow passage 34, thereby constituting a coolant flow path. The second flow passage 36 is formed by overlapping second slits 37 formed in the respective steel plates at an axially intermediate region A of the rotor core 24, the formed position of the second slit 37 being different for each steel plate combined. The first flow passage 34 and the second flow passage 36 join at the axially intermediate region A of the rotor core 24.Type: GrantFiled: March 7, 2014Date of Patent: October 31, 2017Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN AW CO., LTD., AISIN SEIKI KABUSHIKI KAISHAInventors: Yoshitada Yamagishi, Yu Hirai, Tatsuhiko Mizutani, Masashi Matsumoto, Takashi Matsumoto, Shinya Sano, Taketo Takeuchi, Akifumi Kurokawa
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Publication number: 20160036276Abstract: A rotor 14 includes a shaft having a coolant flow passage and a coolant supply port, a rotor core 24 fixed on the shaft and formed of laminated steel plates, and a magnet set 32 provided in the rotor core 24 to extend along an axial direction thereof. The rotor core 24 has a first flow passage 34 provided near the magnet to extend therealong and a second flow passage 36 that connects the coolant supply port 28 of the shaft 22 and the first flow passage 34, thereby constituting a coolant flow path. The second flow passage 36 is formed by overlapping second slits 37 formed in the respective steel plates at an axially intermediate region A of the rotor core 24, the formed position of the second slit 37 being different for each steel plate combined. The first flow passage 34 and the second flow passage 36 join at the axially intermediate region A of the rotor core 24.Type: ApplicationFiled: March 7, 2014Publication date: February 4, 2016Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN SEIKI KABUSHIKI KAISHA, AISIN AW CO., LTD.Inventors: Yoshitada YAMAGISHI, Yu HIRAI, Tatsuhiko MIZUTANI, Masashi MATSUMOTO, Takashi MATSUMOTO, Shinya SANO, Taketo TAKEUCHI, Akifumi KUROKAWA
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Publication number: 20140054986Abstract: A control apparatus for a rotary electric machine, which has a rotary element that includes a permanent magnet, includes a magnet temperature acquisition portion, a coolant temperature detection portion and a temperature control portion. The magnet temperature acquisition portion acquires information about temperature of the permanent magnet. The coolant temperature detection portion detects temperature of a coolant that cools at least the rotary element. The temperature control portion performs a temperature raising control of the permanent magnet when the temperature of the permanent magnet is less than or equal to a first threshold temperature and the temperature of the coolant is less than or equal to a second threshold temperature.Type: ApplicationFiled: August 6, 2013Publication date: February 27, 2014Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yu HIRAI, Kazuhide MIYATA