Patents by Inventor Haruki Yoshida
Haruki Yoshida 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: 20240140150Abstract: The disclosure provides a vehicle body rear structure, which can reduce damage to the vehicle during a collision from the rear. The vehicle body rear structure includes a chassis rear, a hook reinforcement part fixed to a lower surface of the chassis rear; and a hook fixed on a back side of the chassis rear through the hook reinforcement part, in which the hook reinforcement part includes a plurality of part members independent from each other, the plurality of part members are connected in series and joined in a front-back direction of the vehicle to form a joint boundary part, and the joint boundary part is disposed with a weakened part on a side close to the chassis rear.Type: ApplicationFiled: October 23, 2023Publication date: May 2, 2024Applicant: Honda Motor Co., Ltd.Inventors: Kyosuke YAMAKITA, Keisakuro YAMAGUCHI, Yusuke MIURA, Masayuki Yoshida, Hiroki Kashimoto, Haruki Aizawa
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Publication number: 20230039294Abstract: A connector connection structure includes: a first connector; a second connector electrically connected to the first connector; a unit to which the first connector is ground-connected; and a seal member sealing a gap between the first connector and the unit. The unit has a hole portion that includes a first portion and a second portion having a diameter smaller than a diameter of the first portion. The first connector includes shield shell provided with a contact portion having a contact part that is to abut an inner peripheral surface. A radius of the first portion is larger than a distance from a central axis of an electric wire of the first connector to a contact part in a neutral state. A core wire of the electric wire is electrically connected to a terminal portion of the second connector via a terminal portion of the first connector.Type: ApplicationFiled: August 2, 2022Publication date: February 9, 2023Applicant: Yazaki CorporationInventors: Haruki YOSHIDA, Jumpei HAYASHI
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Publication number: 20230008031Abstract: A spark plug which includes an insulator having an axial hole extending along an axial line, a metallic shell disposed around the insulator, and a center electrode disposed in the axial hole to be located on the forward end side of the axial line is provided. The insulator has a step portion provided on the outer circumferential surface thereof and facing toward the forward end side. The metallic shell has a receiving surface provided on the inner circumferential surface thereof and facing toward the rear end side and with which the step portion is engaged via a packing. A portion of the step portion on the outer circumferential side is a first curved surface being convex toward the forward end side, and a portion of the step portion on the inner circumferential side of the first curved surface is a second curved surface which being convex toward the rear end side.Type: ApplicationFiled: January 18, 2021Publication date: January 12, 2023Applicant: NGK SPARK PLUG CO., LTD.Inventors: Hiroki SHIMADA, Haruki YOSHIDA, Shota TAKAENOKI
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Patent number: 11469681Abstract: A power supply device includes a first output unit that outputs a first alternating current, a second output unit that outputs a second alternating current, and a current combining unit that combines the first alternating current and the second alternating current. The current combining unit includes a first bus bar, a second bus bar, a first conductive member welded to a first surface of the first bus bar and connected to the first output unit, a second conductive member that is welded to a second surface of the first bus bar, penetrates the second bus bar, and is connected to the second output unit, a third conductive member welded to a first surface of the second bus bar and connected to the second output unit, and a fourth conductive member that is welded to a second surface of the second bus bar, penetrates the first bus bar, and is connected to the first output unit. The second surface of the first bus bar faces the second surface of the second bus bar.Type: GrantFiled: July 28, 2021Date of Patent: October 11, 2022Assignee: Neturen Co., Ltd.Inventors: Takahiko Kanai, Haruki Yoshida
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Patent number: 11368099Abstract: A power conversion apparatus includes a rectifier to convert AC power into constant-current DC power, a resonant inverter to convert the DC power into AC power to be output to a load, and a control unit to receive settings of an output current value of the inverter, a current-supplying time of the inverter, an operation rate defined by dividing the current-supplying time by a sum of the current-supplying time and a non-current-supplying time, and a resonance frequency of the load. The control unit operates the rectifier and the inverter only when it determines that it is operable to perform an output in accordance with the set conditions, based on data in which the output frequency, the current-supplying time and the operation rate are associated with an allowable output current value of the inverter at a temperature equal to or lower than a maximum operable temperature of a switching device.Type: GrantFiled: November 19, 2018Date of Patent: June 21, 2022Assignee: NETUREN CO., LTD.Inventors: Takahiko Kanai, Haruki Yoshida
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Patent number: 11336195Abstract: A power conversion apparatus includes a rectifier to convert AC power into constant-current DC power, a resonant inverter to convert the DC power into AC power to be output to a load, and a control unit to receive settings of an output current value of the inverter, a current-supplying time of the inverter, an operation rate defined by dividing the current-supplying time by a sum of the current-supplying time and a non-current-supplying time, and a resonance frequency of the load. The control unit operates the rectifier and the inverter only when it determines that it is operable to perform an output in accordance with the set conditions, based on data in which the output frequency, the current-supplying time and the operation rate are associated with an allowable output current value of the inverter at a temperature equal to or lower than a maximum operable temperature of a switching device.Type: GrantFiled: November 19, 2018Date of Patent: May 17, 2022Assignee: NETUREN CO., LTD.Inventors: Takahiko Kanai, Haruki Yoshida
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Publication number: 20220038022Abstract: A power supply device includes a first output unit that outputs a first alternating current, a second output unit that outputs a second alternating current, and a current combining unit that combines the first alternating current and the second alternating current. The current combining unit includes a first bus bar, a second bus bar, a first conductive member welded to a first surface of the first bus bar and connected to the first output unit, a second conductive member that is welded to a second surface of the first bus bar, penetrates the second bus bar, and is connected to the second output unit, a third conductive member welded to a first surface of the second bus bar and connected to the second output unit, and a fourth conductive member that is welded to a second surface of the second bus bar, penetrates the first bus bar, and is connected to the first output unit. The second surface of the first bus bar faces the second surface of the second bus bar.Type: ApplicationFiled: July 28, 2021Publication date: February 3, 2022Inventors: Takahiko Kanai, Haruki Yoshida
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Patent number: 11183819Abstract: A spark plug according to one embodiment of the present invention includes an insulator formed of an alumina-based sintered body, wherein the insulator contains 90 wt % or more of an aluminum component in terms of oxide, and wherein crystal grains of the insulator has an average grain size of 1.5 mm or smaller and a grain size standard deviation of 1.2 ?m or smaller.Type: GrantFiled: September 18, 2019Date of Patent: November 23, 2021Assignee: NGK SPARK PLUG CO., LTD.Inventors: Yutaka Yokoyama, Nobuyoshi Araki, Kuniharu Tanaka, Haruki Yoshida, Hironori Uegaki, Toshiki Kon, Yusuke Nomura
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Patent number: 11146041Abstract: An insulator for a spark plug including a first portion; a second portion located on the rear side of the first portion, an outer diameter F at a front end of the second portion being smaller than an outer diameter of the first portion; a third portion located on the front side of the first portion, an outer diameter D at a rear end of the third portion being smaller than the outer diameter of the first portion and the outer diameter F at the front end of the second portion; a first slope portion connecting the first portion and the second portion; and a second slope portion connecting the first portion and the third portion. A length A of the second slope portion and a length B of the first slope portion satisfy 2.0?A/B?3.9, and 0.50?D/F?0.88 is satisfied.Type: GrantFiled: June 23, 2020Date of Patent: October 12, 2021Assignee: NGK SPARK PLUG CO., LTD.Inventors: Hiroki Shimada, Haruki Yoshida, Naoya Harata
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Publication number: 20210257816Abstract: An insulator for a spark plug including a first portion; a second portion located on the rear side of the first portion, an outer diameter F at a front end of the second portion being smaller than an outer diameter of the first portion; a third portion located on the front side of the first portion, an outer diameter D at a rear end of the third portion being smaller than the outer diameter of the first portion and the outer diameter F at the front end of the second portion; a first slope portion connecting the first portion and the second portion; and a second slope portion connecting the first portion and the third portion. A length A of the second slope portion and a length B of the first slope portion satisfy 2.0?A/B?3.9, and 0.50?D/F?0.88 is satisfied.Type: ApplicationFiled: June 23, 2020Publication date: August 19, 2021Applicant: NGK SPARK PLUG CO., LTD.Inventors: Hiroki SHIMADA, Haruki YOSHIDA, Naoya HARATA
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Patent number: 10973090Abstract: An induction heating power supply apparatus includes a smoothing section to smooth pulsating current of DC power output from a DC power supply section, and an inverter to convert the DC power smoothed by the smoothing section to AC power. The smoothing section includes a pair of bus bars connected to the inverter and a capacitor connected to the pair of bus bars. Each of the bus bars has an external surface extending in a current flow direction, the external surface including a flat face having a larger surface dimension than another face of the external surface in a direction perpendicular to the current flow direction. The bus bars are arranged in a layered manner such that the flat faces of the bus bars are opposed to each other and such that an insulator is sandwiched between the flat faces of the bus bars.Type: GrantFiled: September 8, 2016Date of Patent: April 6, 2021Assignee: NETUREN CO., LTD.Inventors: Takahiko Kanai, Masato Sugimoto, Haruki Yoshida
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Patent number: 10897795Abstract: An induction heating power supply apparatus includes a smoothing section to smooth DC power and an inverter section to convert the smoothed DC power into AC power. The inverter section has first and second modules, each having serially connected switching devices. Output bus bars are interposed between the first and second modules. The smoothing section has first bus bars connected to a DC power supply section and the first module, a capacitor connected to the first bus bars, second bus bars connected to the DC power supply section and the second module, and another capacitor connected to the second bus bars. The first and second bus bars extend parallel to the output bus bars. The first module is interposed between the first bus bars and the output bus bars. The second module is interposed between the second bus bars and the output bus bars.Type: GrantFiled: December 22, 2016Date of Patent: January 19, 2021Assignee: NETUREN CO., LTD.Inventors: Takahiko Kanai, Masato Sugimoto, Haruki Yoshida
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Patent number: 10879675Abstract: A spark plug having an insulator with a leg portion whose outer circumferential surface has an arithmetic mean roughness Ra of 0.5 ?m or less. The leg portion has a first section, a second section, and a third section. The first section has an outer diameter that decreases toward the forward end of the first section. The second section is located forward of and adjacent to the first section and its outer diameter decreases toward the forward end of the second section. The outer circumferential surface of the second section is located inward of a first straight line passing through the base and forward ends of the outer circumferential surface of the first section. The third section is located forward of and adjacent to the second section. The outer diameter of the third section is equal to or less than a forward end outer diameter Ds of the second section over the entire third section.Type: GrantFiled: May 30, 2017Date of Patent: December 29, 2020Assignee: NGK SPARK PLUG CO., LTD.Inventors: Haruki Yoshida, Kuniharu Tanaka, Yutaka Yokoyama, Shun Kondo, Hirokazu Kurono, Toshimasa Saji
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Publication number: 20200403522Abstract: A power conversion apparatus includes a rectifier to convert AC power into constant-current DC power, a resonant inverter to convert the DC power into AC power to be output to a load, and a control unit to receive settings of an output current value of the inverter, a current-supplying time of the inverter, an operation rate defined by dividing the current-supplying time by a sum of the current-supplying time and a non-current-supplying time, and a resonance frequency of the load. The control unit operates the rectifier and the inverter only when it determines that it is operable to perform an output in accordance with the set conditions, based on data in which the output frequency, the current-supplying time and the operation rate are associated with an allowable output current value of the inverter at a temperature equal to or lower than a maximum operable temperature of a switching device.Type: ApplicationFiled: November 19, 2018Publication date: December 24, 2020Applicant: NETUREN CO., LTD.Inventors: Takahiko KANAI, Haruki YOSHIDA
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Publication number: 20200313541Abstract: An inverter of a power supply apparatus includes a smoothing circuit. The smoothing circuit includes a circuit body having a positive-side output terminal and a negative-side output terminal, and a plurality of capacitors mounted on the circuit body and connected in parallel between the positive-side output terminal and the negative-side output terminal. A difference between the maximum value and the minimum value among positive-negative electrical path lengths lnPNi=lnPi+lnNi (i=1, 2, and 3) for the respective capacitors is equal to or smaller than 30% of the minimum value.Type: ApplicationFiled: October 2, 2018Publication date: October 1, 2020Applicant: NETUREN CO., LTD.Inventors: Takahiko KANAI, Haruki YOSHIDA
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Patent number: 10736184Abstract: A power supply apparatus for induction heating is provided. The power supply apparatus includes a smoothing filter configured to smooth a pulsating current of DC power output from a DC power supply, and an inverter configured to convert the DC power that has been smoothed by the smoothing filter into AC power. The smoothing filter includes a plurality of capacitors having different internal inductances and connected to each other in parallel between input terminals of the inverter, each of the capacitors being connected to the input terminals of the inverter directly or through a pair of bus bars. The plurality of capacitors includes a first capacitor and a second capacitor, the first capacitor having smaller internal inductance than the second capacitor and a shorter conductive path between the input terminals of the inverter than the second capacitor.Type: GrantFiled: May 31, 2016Date of Patent: August 4, 2020Assignee: NETUREN CO., LTD.Inventors: Takahiko Kanai, Masato Sugimoto, Haruki Yoshida
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Publication number: 20200112146Abstract: A spark plug according to one embodiment of the present invention includes an insulator formed of an alumina-based sintered body, wherein the insulator contains 90 wt % or more of an aluminum component in terms of oxide, and wherein crystal grains of the insulator has an average grain size of 1.5 mm or smaller and a grain size standard deviation of 1.2 ?m or smaller.Type: ApplicationFiled: September 18, 2019Publication date: April 9, 2020Applicant: NGK SPARK PLUG CO., LTD.Inventors: Yutaka Yokoyama, Nobuyoshi Araki, Kuniharu Tanaka, Haruki Yoshida, Hironori Uegaki, Toshiki Kon, Yusuke Nomura
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Patent number: 10586627Abstract: The spark plug includes an insulator made from an alumina-based sintered body, and the insulator contains 90 to 98 wt % of an Al component in oxide equivalent. The insulator contains 1 to 5 wt % of an Si component, 0.1 to 1 wt % of an Mg component, 2 wt % or less of a Ca component, 0.3 to 6 wt % of a Ba component, and 0.11 to 5 wt % of a rare earth component, in oxide equivalent. In analysis using a scanning transmission electron microscope with a probe diameter of an electron beam set at 1 nm, Si and a rare earth element are detected at a crystal grain boundary having a thickness of 15 nm or less, and an alkaline earth metal at the crystal grain boundary is less than a detection limit.Type: GrantFiled: June 22, 2018Date of Patent: March 10, 2020Assignee: NGK SPARK PLUG CO., LTD.Inventors: Haruki Yoshida, Kuniharu Tanaka, Shun Kondo, Yutaka Yokoyama, Yusuke Nomura, Michitaka Yamada
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Patent number: 10424901Abstract: Provided is a spark plug capable of ensuring fouling resistance with a simple configuration. An insulator includes a step portion formed on an outer circumferential surface thereof. A center electrode is arranged in an axial hole of the insulator. A cylindrical metal shell having a shelf portion formed on an inner circumferential surface thereof is arranged radially outside the insulator. The insulator further includes a front end portion located frontward of the step portion. An outer circumferential surface of the front end portion has an arithmetic average roughness of 0.5 ?m or smaller in a circumferential direction. A recess is formed with a depth of 3 to 20 ?m in at least part of an end surface and the outer circumferential surface of the front end portion so as to extend from the front toward the rear.Type: GrantFiled: May 25, 2017Date of Patent: September 24, 2019Assignee: NGK SPARK PLUG CO., LTD.Inventors: Jumpei Isasa, Seiji Nakano, Hirokazu Kurono, Kuniharu Tanaka, Yutaka Yokoyama, Haruki Yoshida, Shun Kondo
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Patent number: 10348061Abstract: The spark plug includes an insulator formed of an alumina-based sintered body, and the insulator contains Si, Ba, and a rare earth element. In an analysis of the insulator by using a scanning transmission electron microscope having an electron-probe diameter of 1 nm, Si and a rare earth element are detected at a crystal grain boundary having a thickness of 15 nm or less, a content of an alkaline earth metal is less than a detection limit at the crystal grain boundary, and a diffraction spot is present in an electron diffraction pattern of a portion where Ba is detected.Type: GrantFiled: June 26, 2018Date of Patent: July 9, 2019Assignee: NGK SPARK PLUG CO., LTD.Inventors: Hideto Yamada, Haruki Yoshida, Kuniharu Tanaka, Michitaka Yamada, Yusuke Nomura