Patents by Inventor Ryosuke Yamaguchi

Ryosuke Yamaguchi 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).

  • Publication number: 20250137484
    Abstract: There is provided a sliding component that allows a fluid to be easily introduced into a spiral groove. A sliding component includes a pair of sliding rings that slide relative to each other, and a spiral groove communicating with a space on a leakage side is provided on a sliding surface of the sliding ring. An expansion portion continuous from the sliding surface of the one sliding ring and expanded toward the space is formed at an edge portion on a side of the space. The expansion portion is provided with an inclined groove continuous with the spiral groove and extending toward the space.
    Type: Application
    Filed: July 27, 2022
    Publication date: May 1, 2025
    Inventors: Takahiro TSUKAMOTO, Ryosuke UCHIYAMA, Gai YAMAGUCHI, Yuta NEGISHI, Hiroshi SUZUKI, Tadatsugu IMURA, Iwa OU, Shogo FUKUDA, Kenta UCHIDA
  • Patent number: 12286147
    Abstract: A steering device that holds a steering member in such a manner that the steering member is movable between an advanced position where a driver can steer the steering member and a retracted position located closer to the front of a vehicle. The steering device includes: a fixed member attached to a vehicle body; a movable member to which a steering shaft holding the steering member is rotatably attached; and an upper guide mechanism and a lower guide mechanism that linearly guide the movable member with respect to the fixed member. An end on the advancing side of the upper guide mechanism is located further toward the advancing side than an end on the advancing side of the lower guide mechanism in an advancing and retracting direction of the movable member.
    Type: Grant
    Filed: February 2, 2022
    Date of Patent: April 29, 2025
    Assignee: JTEKT CORPORATION
    Inventors: Ryoichi Tokioka, Yasuyuki Nozawa, Ryosuke Yamaguchi
  • Publication number: 20250091635
    Abstract: A steering device that holds a steering member in such a manner that the steering member is movable between an advanced position where a driver can steer the steering member and a retracted position located closer to the front of a vehicle. The steering device includes: a fixed member attached to a vehicle body; a movable member to which a steering shaft holding the steering member is rotatably attached; and an upper guide mechanism and a lower guide mechanism that linearly guide the movable member with respect to the fixed member. An end on the advancing side of the upper guide mechanism is located further toward the advancing side than an end on the advancing side of the lower guide mechanism in an advancing and retracting direction of the movable member.
    Type: Application
    Filed: February 2, 2022
    Publication date: March 20, 2025
    Applicant: JTEKT CORPORATION
    Inventors: Ryoichi TOKIOKA, Yasuyuki NOZAWA, Ryosuke YAMAGUCHI
  • Patent number: 12255220
    Abstract: A first light receiving element according to an embodiment of the present disclosure includes a plurality of pixels, a photoelectric converter that is provided as a layer common to the plurality of pixels, and contains a compound semiconductor material, and a first electrode layer that is provided between the plurality of pixels on light incident surface side of the photoelectric converter, and has a light-shielding property.
    Type: Grant
    Filed: January 18, 2023
    Date of Patent: March 18, 2025
    Assignee: Sony Semiconductor Solutions Corporation
    Inventors: Shuji Manda, Ryosuke Matsumoto, Suguru Saito, Shigehiro Ikehara, Tetsuji Yamaguchi, Shunsuke Maruyama
  • Patent number: 12233934
    Abstract: A steering device that holds a steering member in such a manner that the steering member is movable between a first position where a driver can steer the steering member and a second position located closer to the front of a vehicle includes: a fixed member attached to a vehicle body; a movable member movably attached to the fixed member via a rail mechanism; a steering shaft attached to the movable member and rotatably holding the steering member; and a reaction force device attached to the movable member at a position non-coaxial with the steering shaft and configured to apply a reaction force to the steering shaft.
    Type: Grant
    Filed: September 12, 2022
    Date of Patent: February 25, 2025
    Assignee: JTEKT CORPORATION
    Inventors: Yasuyuki Nozawa, Ryosuke Yamaguchi, Yoshihiro Oono, Ryoichi Tokioka
  • Publication number: 20250035213
    Abstract: A shaft sealing device capable of maintaining high lubricity between sliding surfaces is provided. Communication paths communicating with an external space are connected to a drive space and a fluid in the drive space introduced between a pair of sliding surfaces by a fluid introduction mechanism is replenished from an external space through the communication paths.
    Type: Application
    Filed: March 7, 2022
    Publication date: January 30, 2025
    Inventors: Yuta NEGISHI, Ryosuke UCHIYAMA, Gai YAMAGUCHI, Yuki MAETANI, Takahiro TSUKAMOTO, Osamu MATSUMOTO, Sayaka MIYAZAKI, Hiroki INOUE, Minori ONUMA, So MAKISHIMA
  • Publication number: 20250018994
    Abstract: A steering device that holds a steering member in such a manner that the steering member is movable between a first position where a driver can steer the steering member and a second position located closer to the front of a vehicle includes: a fixed member attached to a vehicle body; a movable member movably attached to the fixed member via a rail mechanism; a steering shaft attached to the movable member and rotatably holding the steering member; and a reaction force device attached to the movable member at a position non-coaxial with the steering shaft and configured to apply a reaction force to the steering shaft.
    Type: Application
    Filed: September 12, 2022
    Publication date: January 16, 2025
    Applicant: JTEKT CORPORATION
    Inventors: Yasuyuki NOZAWA, Ryosuke YAMAGUCHI, Yoshihiro OONO, Ryoichi TOKIOKA
  • Patent number: 11268164
    Abstract: A steel sheet having a specified chemical composition and a method for producing the steel sheet. The steel sheet has a microstructure including martensite and bainite. The total area fraction of the martensite and the bainite to the entirety of the microstructure is 95% or more and 100% or less. The balance of the microstructure is at least one of ferrite and retained austenite. The microstructure includes specific inclusion clusters, the content of the inclusion clusters in the microstructure being 5 clusters/mm2 or less. The microstructure includes prior-austenite grains having an average size of more than 5 ?m. The steel sheet has a tensile strength of 1320 MPa or more.
    Type: Grant
    Filed: September 28, 2017
    Date of Patent: March 8, 2022
    Assignee: JFE STEEL CORPORATION
    Inventors: Shimpei Yoshioka, Yoshihiko Ono, Kenta Hidaka, Ryosuke Yamaguchi
  • Patent number: 10870902
    Abstract: A cold-rolled steel sheet has: a predetermined chemical composition; and a microstructure in which tempered martensite and bainite are contained in a total area ratio of 95-100% with respect to a whole volume of the microstructure; a number of predetermined inclusion groups is at most 0.8/mm2, the inclusion groups being formed by one or more inclusion particles, the one or more inclusion particles having a major axis length of 0.3 ?m or more and extending and/or distributed in a dot-sequence manner along a rolling direction; a number of carbides mainly composed of Fe having a predetermined size is at most 3,500/mm2; a number of carbides that are distributed in the tempered martensite and/or in the bainite and that have a diameter of 10 nm to 50 nm is at least 0.7×107/mm2; and prior ? grains have a mean grain size of 18 ?m or less.
    Type: Grant
    Filed: March 23, 2016
    Date of Patent: December 22, 2020
    Assignee: JFE STEEL CORPORATION
    Inventors: Yoshihiko Ono, Yoshimasa Funakawa, Ryosuke Yamaguchi, Nobuyuki Nakamura
  • Publication number: 20190203317
    Abstract: A steel sheet having a specified chemical composition and a method for producing the steel sheet. The steel sheet has a microstructure including martensite and bainite. The total area fraction of the martensite and the bainite to the entirety of the microstructure is 95% or more and 100% or less. The balance of the microstructure is at least one of ferrite and retained austenite. The microstructure includes specific inclusion clusters, the content of the inclusion clusters in the microstructure being 5 clusters/mm2 or less. The microstructure includes prior-austenite grains having an average size of more than 5 ?m. The steel sheet has a tensile strength of 1320 MPa or more.
    Type: Application
    Filed: September 28, 2017
    Publication date: July 4, 2019
    Applicant: JFE STEEL CORPORATION
    Inventors: Shimpei YOSHIOKA, Yoshihiko ONO, Kenta HIDAKA, Ryosuke YAMAGUCHI
  • Patent number: 10274517
    Abstract: Provided is a conductive probe having a first end portion and a second end portion opposing the first end portion. The first end portion includes first to fourth linear ridges and first to fifth vertexes, and the first to fourth linear ridges are spaced from one another and arranged to form a cross. The first to fourth vertexes are located on an outer circumference of the first end portion and further arranged between the first linear ridge and the second linear ridge, between the second linear ridge and the third linear ridge, between the third linear ridge and the fourth linear ridge, and between the fourth linear ridge and the first linear ridge, respectively.
    Type: Grant
    Filed: February 1, 2017
    Date of Patent: April 30, 2019
    Assignee: NHK SPRING CO., LTD.
    Inventors: Kohei Hironaka, Kazuya Souma, Satoshi Shoji, Ryosuke Yamaguchi
  • Patent number: 10141800
    Abstract: A magnet-embedded rotor includes a cylindrical rotor core that rotates together with a rotating shaft; and permanent magnets embedded in the rotor core. The rotor core includes core members, and each core member includes a tubular portion into which the rotating shaft is inserted and projecting portions formed to project in a radial direction of the tubular portion from an outer periphery of the tubular portion and arranged apart from each other in a circumferential direction of the tubular portion. The rotor core is formed by assembling the core members such that the tubular portions are arranged on one straight line and the projecting portion of the core member and the projecting portion of the other core member are adjacent to each other in a circumferential direction of the rotor core. The permanent magnet is embedded in each projecting portion of each core member.
    Type: Grant
    Filed: March 19, 2014
    Date of Patent: November 27, 2018
    Assignee: JTEKT CORPORATION
    Inventors: Keita Nimura, Naotake Kanda, Ryosuke Yamaguchi
  • Patent number: 10116193
    Abstract: An interior permanent magnet rotor includes a cylindrical rotor core having an axial hole extending in an axial direction, and a resin magnet that is formed to fill the axial hole by injection molding and that has a pair of axial end faces. The resin magnet includes a linear portion that has a linear shape in section perpendicular to the axial direction of the rotor core. The linear portion has a first end and a second end located closer to an outer periphery of the rotor core than the first end is. A gate mark is located on the second end of the linear portion on at least one of the axial end faces of the resin magnet.
    Type: Grant
    Filed: October 23, 2015
    Date of Patent: October 30, 2018
    Assignee: JTEKT CORPORATION
    Inventors: Ryosuke Yamaguchi, Keita Nimura, Koji Tachi
  • Publication number: 20180238932
    Abstract: Provided is a conductive probe having a first end portion and a second end portion opposing the first end portion. The first end portion includes first to fourth linear ridges and first to fifth vertexes, and the first to fourth linear ridges are spaced from one another and arranged to form a cross. The first to fourth vertexes are located on an outer circumference of the first end portion and further arranged between the first linear ridge and the second linear ridge, between the second linear ridge and the third linear ridge, between the third linear ridge and the fourth linear ridge, and between the fourth linear ridge and the first linear ridge, respectively.
    Type: Application
    Filed: February 1, 2017
    Publication date: August 23, 2018
    Inventors: Kohei HIRONAKA, Kazuya SOUMA, Satoshi SHOJI, Ryosuke YAMAGUCHI
  • Publication number: 20180100212
    Abstract: A cold-rolled steel sheet has: a predetermined chemical composition; and a microstructure in which tempered martensite and bainite are contained in a total area ratio of 95-100% with respect to a whole volume of the microstructure; a number of predetermined inclusion groups is at most 0.8/mm2, the inclusion groups being formed by one or more inclusion particles, the one or more inclusion particles having a major axis length of 0.3 ?m or more and extending and/or distributed in a dot-sequence manner along a rolling direction; a number of carbides mainly composed of Fe having a predetermined size is at most 3,500/mm2; a number of carbides that are distributed in the tempered martensite and/or in the bainite and that have a diameter of 10 nm to 50 nm is at least 0.7×107/mm2; and prior ? grains have a mean grain size of 18 ?m or less.
    Type: Application
    Filed: March 23, 2016
    Publication date: April 12, 2018
    Applicant: JFE STEEL CORPORATION
    Inventors: Yoshihiko ONO, Yoshimasa FUNAKAWA, Ryosuke YAMAGUCHI, Nobuyuki NAKAMURA
  • Publication number: 20170366075
    Abstract: A synchronous reluctance motor includes: an annular stator; and a rotor disposed radially inside the stator. The stator includes an annular stator core having in its inner peripheral portion a plurality of slots located at intervals in a circumferential direction of the stator, and slot coils accommodated in the slots. The slot coils are formed by a wire having a quadrilateral section and are wound in the slots by distributed winding.
    Type: Application
    Filed: June 13, 2017
    Publication date: December 21, 2017
    Applicant: JTEKT CORPORATION
    Inventors: Mingyu TONG, Ken MATSUBARA, Yuji KARIATSUMARI, Hirohide INAYAMA, Shigekazu OKUMURA, Ryosuke YAMAGUCHI
  • Patent number: 9812239
    Abstract: A manufacturing device for a rotor core includes: a magnetization device that magnetizes magnet raw materials before being magnetized disposed in magnet insertion holes of the rotor core to turn the magnet raw materials before being magnetized into permanent magnets; and a detachment device that detaches the rotor core from the magnetization device. The detachment device also functions as a mounting device that mounts a jig around the rotor core when the rotor core is detached from the magnetization device.
    Type: Grant
    Filed: January 14, 2015
    Date of Patent: November 7, 2017
    Assignee: JTEKT CORPORATION
    Inventors: Keita Nimura, Naotake Kanda, Ryosuke Yamaguchi
  • Publication number: 20160126792
    Abstract: An interior permanent magnet rotor includes a cylindrical rotor core having an axial hole extending in an axial direction, and a resin magnet that is formed to fill the axial hole by injection molding and that has a pair of axial end faces. The resin magnet includes a linear portion that has a linear shape in section perpendicular to the axial direction of the rotor core. The linear portion has a first end and a second end located closer to an outer periphery of the rotor core than the first end is. A gate mark is located on the second end of the linear portion on at least one of the axial end faces of the resin magnet.
    Type: Application
    Filed: October 23, 2015
    Publication date: May 5, 2016
    Inventors: Ryosuke YAMAGUCHI, Keita NIMURA, Koji TACHI
  • Publication number: 20160111945
    Abstract: A radial magnetizing part including permanent magnets is disposed so as to face a rotor unit in a radial direction of the rotor unit. Axial magnetizing parts are disposed on both end faces in an axial direction of the rotor unit. The axial magnetizing parts include low magnetic permeability portions and high magnetic permeability portions. The low magnetic permeability portions are disposed so as to face magnet materials. Magnetic flux from the N pole of the permanent magnet of the radial magnetizing part enters a core in the radial direction, crosses the magnet material, and returns to the S pole of the permanent magnet. The magnetic flux from the N pole of the permanent magnet of the radial magnetizing part also enters the core through the high magnetic permeability portions of the axial magnetizing parts, crosses the magnet material, and returns to the S pole of the permanent magnet.
    Type: Application
    Filed: October 7, 2015
    Publication date: April 21, 2016
    Applicant: JTEKT CORPORATION
    Inventors: Ryosuke YAMAGUCHI, Yoshihiro OONO, Naotake KANDA, Yoshiyuki SHIBATA
  • Publication number: 20150206642
    Abstract: A manufacturing device for a rotor core includes: a magnetization device that magnetizes magnet raw materials before being magnetized disposed in magnet insertion holes of the rotor core to turn the magnet raw materials before being magnetized into permanent magnets; and a detachment device that detaches the rotor core from the magnetization device. The detachment device also functions as a mounting device that mounts a jig around the rotor core when the rotor core is detached from the magnetization device.
    Type: Application
    Filed: January 14, 2015
    Publication date: July 23, 2015
    Inventors: Keita NIMURA, Naotake KANDA, Ryosuke YAMAGUCHI