Patents by Inventor Hirotaka Yokota
Hirotaka Yokota 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: 20230039058Abstract: A Sm—Fe—N magnet includes Sm—Fe—N particles, wherein an inter-particle metal phase is present between at least two of the Sm—Fe—N particles, an average particle diameter of the Sm—Fe—N particles is less than 2.0 ?m, and a percentage of the Sm—Fe—N particles having an aspect ratio of 2.0 or more is 10% or less, the inter-particle metal phase includes a Fe3Zn10 phase and an ?-Fe phase in a particle form, and in the inter-particle metal phase, an area ratio of the Fe3Zn10 phase is 80% or more.Type: ApplicationFiled: July 27, 2022Publication date: February 9, 2023Applicants: TDK Corporation, National Institute of Advanced Industrial Science and TechnologyInventors: Hirotaka YOKOTA, Eiichiro Fukuchi, Shusuke Okada, Kenta Takagi
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Publication number: 20230043317Abstract: A Sm—Fe—N magnet includes Sm—Fe—N particles each having a surface, a coating layer being provided on at least a portion of the surface or on at least a portion of an interface between at least two of the Sm—Fe—N particles, or being provided on both, wherein the coating layer includes a first layer and a second layer, the first layer being situated closer to the surface or the interface than is the second layer, he first layer includes ?-Fe, the second layer includes a Sm—Fe—Zn alloy, and a Zn content contained in the second layer is 1 at % or more and 20 at % or less.Type: ApplicationFiled: July 27, 2022Publication date: February 9, 2023Applicants: TDK Corporation, National Institute of Advanced Industrial Science and TechnologyInventors: Hirotaka YOKOTA, Shusuke Okada, Kenta Takagi
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Publication number: 20220301751Abstract: Provided is an Sm—Fe—N rare earth magnet comprising Sm—Fe—N crystal grains. An oxygen content in the Sm—Fe—N rare earth magnet is 0.5% by mass or less on the basis of a total amount of the Sm—Fe—N rare earth magnet, and an average grain size of the Sm—Fe—N crystal grains is 1 ?m or less.Type: ApplicationFiled: October 29, 2020Publication date: September 22, 2022Applicant: TDK CorporationInventor: Hirotaka YOKOTA
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Patent number: 11374445Abstract: A stator unit of a rotary electric machine, which includes a stator including a stator core in which a plurality of slots are formed at predetermined intervals in a circumferential direction; and a stator coil inserted into the slots and having a coil end portion protruding from at least one end surface of the stator core; a stator holder disposed to surround an outer peripheral surface of the stator core and supporting the stator; and a refrigerant guide portion disposed above the coil end portion and configured to supply a first refrigerant to the coil end portion. The refrigerant guide portion protrudes from an end surface of the stator holder to above the coil end portion and is integrally formed with the stator holder.Type: GrantFiled: November 4, 2019Date of Patent: June 28, 2022Assignee: HONDA MOTOR CO., LTD.Inventors: Hirotaka Yokota, Manabu Sakurada
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Publication number: 20200153292Abstract: A stator unit of a rotary electric machine, which includes a stator including a stator core in which a plurality of slots are formed at predetermined intervals in a circumferential direction; and a stator coil inserted into the slots and having a coil end portion protruding from at least one end surface of the stator core; a stator holder disposed to surround an outer peripheral surface of the stator core and supporting the stator; and a refrigerant guide portion disposed above the coil end portion and configured to supply a first refrigerant to the coil end portion. The refrigerant guide portion protrudes from an end surface of the stator holder to above the coil end portion and is integrally formed with the stator holder.Type: ApplicationFiled: November 4, 2019Publication date: May 14, 2020Applicant: HONDA MOTOR CO., LTD.Inventors: Hirotaka YOKOTA, Manabu SAKURADA
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Patent number: 10641392Abstract: An actuator having sufficiently high detection accuracy while having a simple configuration is provided. An actuator includes a cylinder (51), a piston (52) that moves inside the cylinder (51), a stroke sensor (53) that detects a position of the piston (52), an edge portion (51a1) that restricts rotation to one side, and a restriction protrusion (51b) that restricts rotation to the other side. The amount of rotation allowed by the edge portion (51a1) is larger than the amount of rotation allowed by the restriction protrusion (51b). A center of a sensor (53c) of the stroke sensor (53) is shifted to one side from a center of a member to be detected (53b) fixed to the piston (52).Type: GrantFiled: March 9, 2018Date of Patent: May 5, 2020Assignee: Honda Motor Co., Ltd.Inventors: Itsuki Shimazaki, Shunsuke Yoshida, Hirotaka Yokota
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Patent number: 10527160Abstract: A resin case is placed directly on an external wall of a vehicle transmission, and configures an outer peripheral side of a control unit for the transmission, with a connector to be joined to a harness connected to a functional component inside the transmission being electrically connected to the control unit. The resin case includes a case body and a rib provided to an outer surface of the case body. For example, the rib configures a heat release rib.Type: GrantFiled: April 2, 2018Date of Patent: January 7, 2020Assignee: HONDA MOTOR CO., LTD.Inventor: Hirotaka Yokota
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Publication number: 20180283533Abstract: Provided is a control device unit installation structure for a transmission in which wear of a terminal of a control device unit electrically connected to a lumped coupler is suppressed when the control device unit is fixed to a cover constituting a part of an outer wall of a transmission. In the control device unit installation structure for a transmission (1) in which a control device unit (60) of the transmission (1) of a vehicle is directly mounted on an outer wall of the transmission (1) and a harness connected to a functional part inside the transmission (1) is electrically connected to the control device unit (60), the control device unit (60) is installed on one cover (12) forming a part of the outer wall, and the harness is coupled to the controller device unit (60) on the one cover (12) via a lumped coupler installed in the transmission (1).Type: ApplicationFiled: March 9, 2018Publication date: October 4, 2018Applicant: Honda Motor Co.,Ltd.Inventors: Hirotake OMOTO, Shunsuke YOSHIDA, Hirotaka YOKOTA
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Publication number: 20180283534Abstract: A resin case is placed directly on an external wall of a vehicle transmission, and configures an outer peripheral side of a control unit for the transmission, with a harness connected to a functional component inside the transmission being electrically connected to the control unit. The resin case includes a case body and a rib provided to an outer surface of the case body. For example, the rib configures a heat release rib.Type: ApplicationFiled: April 2, 2018Publication date: October 4, 2018Applicant: HONDA MOTOR CO., LTD.Inventor: Hirotaka Yokota
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Publication number: 20180266555Abstract: An actuator having sufficiently high detection accuracy while having a simple configuration is provided. An actuator includes a cylinder (51), a piston (52) that moves inside the cylinder (51), a stroke sensor (53) that detects a position of the piston (52), an edge portion (51a1) that restricts rotation to one side, and a restriction protrusion (51b) that restricts rotation to the other side. The amount of rotation allowed by the edge portion (51a1) is larger than the amount of rotation allowed by the restriction protrusion (51b). A center of a sensor (53c) of the stroke sensor (53) is shifted to one side from a center of a member to be detected (53b) fixed to the piston (52).Type: ApplicationFiled: March 9, 2018Publication date: September 20, 2018Applicant: Honda Motor Co.,Ltd.Inventors: Itsuki SHIMAZAKI, Shunsuke YOSHIDA, Hirotaka YOKOTA
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Patent number: 9205813Abstract: In case of power supply loss, a parking lock is operated by moving a piston of a hydraulic actuator rightward by use of hydraulic pressure accumulated in an accumulator. If a hydraulic pressure generating source becomes unable to generate line pressure due to its failure after the power supply loss, it is desirable that the parking lock be releasable to tow a vehicle, for example. In that time, because the hydraulic pressure in the accumulator has got out via an orifice, the parking lock can be released by moving the piston in the hydraulic actuator leftward by use of a manual operation device without interruption by the hydraulic pressure accumulated in the accumulator. Because the hydraulic pressure in the accumulator is automatically released via the orifice, a complicated mechanism for enabling the manual operation device to work without interference from the hydraulic actuator becomes unnecessary.Type: GrantFiled: December 17, 2013Date of Patent: December 8, 2015Assignee: HONDA MOTOR CO., LTD.Inventors: Hirotaka Yokota, Shunsuke Yoshida, Yutaka Ishikawa, Tetsuya Mochizuki
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Publication number: 20140370290Abstract: The present invention provides an iron nitride based magnetic powder which comprises the Fe16N2 phases and the Fe4N phases. The iron nitride based magnetic powder of the present invention is obtained by subjecting the iron oxide or the starting material to an reduction treatment and a nitriding treatment, wherein the starting material is obtained by covering the surfaces of the iron oxide particles by a Si-based compound as required. The iron nitride based magnetic powder consists of 70 at % or more and 95 at or less of the phases of Fe16N2. compound and 5 at % or more and 30 at % or less of the phases of Fe4N compound in terms of Fe as measured by the Mossbauer spectra.Type: ApplicationFiled: June 10, 2014Publication date: December 18, 2014Inventors: Hirotaka YOKOTA, Masakazu HOSONO, Kiyoyuki MASUSAWA
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Publication number: 20140190784Abstract: In case of power supply loss, a parking lock is operated by moving a piston of a hydraulic actuator rightward by use of hydraulic pressure accumulated in an accumulator. If a hydraulic pressure generating source becomes unable to generate line pressure due to its failure after the power supply loss, it is desirable that the parking lock be releasable to tow a vehicle, for example. In that time, because the hydraulic pressure in the accumulator has got out via an orifice, the parking lock can be released by moving the piston in the hydraulic actuator leftward by use of a manual operation device without interruption by the hydraulic pressure accumulated in the accumulator. Because the hydraulic pressure in the accumulator is automatically released via the orifice, a complicated mechanism for enabling the manual operation device to work without interference from the hydraulic actuator becomes unnecessary.Type: ApplicationFiled: December 17, 2013Publication date: July 10, 2014Applicant: HONDA MOTOR CO., LTD.Inventors: Hirotaka Yokota, Shunsuke Yoshida, Yutaka Ishikawa, Tetsuya Mochizuki
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Patent number: D1027883Type: GrantFiled: August 20, 2019Date of Patent: May 21, 2024Assignee: SONY CORPORATIONInventors: Shigeya Kuwao, Hirotaka Tako, Hiroaki Yokota