Patents by Inventor Koji Usui

Koji Usui 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).

  • Patent number: 11981200
    Abstract: When temperature of a second power source of a vehicle becomes higher than a threshold value during a first mode in which three rotating elements of a differential gear can make differential movement and when four-wheel drive is needed, switching is performed to a second mode in which the three rotating elements are unified, and when four-wheel drive is not needed even when the temperature of the second power source becomes higher than the threshold value during the first mode, output of the second power source is restricted, while the first mode is maintained.
    Type: Grant
    Filed: February 15, 2022
    Date of Patent: May 14, 2024
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yosuke Akiyama, Akira Ijichi, Taichi Kobayashi, Koji Takaira, Akinori Homan, Yoshio Itou, Kunihiko Usui
  • Patent number: 11970084
    Abstract: A vehicle drive device and a control method therefor are provided. The vehicle drive device includes: a power source including a first rotating electrical machine; a second rotating electrical machine; a differential unit including three rotating elements to which a first output shaft, a second output shaft, and the second rotating electrical machine are connected; and an electronic control device. The electronic control device regeneratively controls the first rotating electrical machine and the second rotating electrical machine in such a manner that negative torque is applied to the first output shaft and the second output shaft, when performing regenerative control by the second rotating electrical machine in a drive mode in which torque from the power source is distributed to the first output shaft and the second output shaft by controlling torque of the second rotating electrical machine during deceleration of a vehicle.
    Type: Grant
    Filed: February 11, 2022
    Date of Patent: April 30, 2024
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Atsushi Tabata, Koichi Okuda, Koji Takaira, Yuki Makino, Akinori Homan, Yosuke Akiyama, Akira Ijichi, Kunihiko Usui
  • Publication number: 20240017710
    Abstract: An electric actuator includes a forwardly and reversely rotatable electric motor, a motion conversion mechanism configured to convert rotation of the electric motor into reciprocating linear motion of a screw shaft, an actuator case containing the electric motor and the motion conversion mechanism, and a boot covering a portion of the screw shaft that extends out of the actuator case. A vent is formed on the actuator case. The vent is configured to ventilate a sealingly closed space in the actuator case and the boot. A breathable waterproof member is provided on the vent and a cover member is also provided on the vent. The breathable waterproof member is configured to block entry and exit of water while permitting entry and exit of air. The cover member is configured to cover the vent so as to allow ventilation with outer air.
    Type: Application
    Filed: October 29, 2021
    Publication date: January 18, 2024
    Inventor: Koji USUI
  • Publication number: 20240010177
    Abstract: In an electric parking brake device configured in such a way that a parking brake state resulting from pulling of a brake cable is released by loosening the brake cable, the brake cable is formed by twisting together a plurality of wires and the direction of twisting is rotational direction of the nut when the brake cable is pulled. This makes it possible to reduce an operating sound and to reduce wear of members constituting a rotation restricting device.
    Type: Application
    Filed: September 20, 2023
    Publication date: January 11, 2024
    Inventor: Koji USUI
  • Patent number: 11867245
    Abstract: Provided is an electric parking brake device in which an actuator case of an electric actuator is mounted to a backplate of a drum brake which includes a parking brake lever, with which electric actuator it is possible to obtain a parking brake state by pulling a brake cable linked with the parking brake lever. The backplate is formed with a through-hole for passing the brake cable and has a connecting tube portion integrally protruding therefrom and enclosing the through-hole. A mounting tube includes, on one end in an axial direction, a joint portion which is formed separately from the backplate and joined to the connecting tube portion. The actuator case is mounted to the mounting tube at certain axial and circumferential positions with respect to the mounting tube. This allows increased freedom of the mounting attitude of the electric actuator with respect to the backplate without increased cost.
    Type: Grant
    Filed: October 18, 2018
    Date of Patent: January 9, 2024
    Assignee: Hitachi Astemo Ltd.
    Inventor: Koji Usui
  • Publication number: 20240003410
    Abstract: An electric actuator includes an electric motor, a nut (a first screw member), and a screw shaft (a second screw member) threadedly inserted through the nut to be able to advance and retreat. Each of threads of the screw shaft includes two flanks and a crest portion connecting the flanks to each other. Grease is used as a lubricant. A groove portion, which is cut out from the crest portion toward a root portion side, is formed on each of the threads of the screw shaft. Further, a taper surface, which flares becoming circumferentially farther away from the groove portion, is formed on at least a part of each of peripheral edges of each groove portion on flank sides. The electric actuator can promote lubrication of a threadedly engaged portion between the first and second screw members, thereby improving motion conversion efficiency and reducing wear on the threadedly engaged portion.
    Type: Application
    Filed: November 12, 2021
    Publication date: January 4, 2024
    Inventors: Koji USUI, Ryo UEYAMA, Takenori ISO, Hiromu NARUKAWA
  • Publication number: 20230366456
    Abstract: An electric actuator including: an electric motor capable of rotating forward and backward; and a motion conversion mechanism configured to convert rotation of the electric motor into reciprocating linear motion of a screw shaft. The motion conversion mechanism including: a nut configured to be rotationally driven by the electric motor; and the screw shaft capable of being threadedly inserted through the nut. A lubricant holding portion having an outer diameter larger than a diameter of a screw hole of the nut and being capable of housing lubricant is formed on an inner periphery of an end of the nut in an axial direction. A lid member configured to cover an opening end of the lubricant holding portion in an axial direction is provided. Thus, an electric actuator can prevent wear at a threaded engagement portion between a nut and a screw shaft by sufficiently lubricating the threaded engagement portion.
    Type: Application
    Filed: October 6, 2021
    Publication date: November 16, 2023
    Inventor: Koji USUI
  • Patent number: 11794710
    Abstract: In an electric parking brake device configured in such a way that a parking brake state resulting from pulling of a brake cable is released by loosening the brake cable, the brake cable is formed by twisting together a plurality of wires in such a way as to generate a twisting force in a fixed direction when pulled, and the direction in which the twisting force generated by the brake cable in a pulled state acts on a screw shaft is set to be the same direction as the direction in which a nut is rotated to loosen the brake cable. This makes it possible to reduce an operating sound and to reduce wear of members constituting a rotation restricting device.
    Type: Grant
    Filed: December 6, 2018
    Date of Patent: October 24, 2023
    Assignee: Hitachi Astemo, Ltd.
    Inventor: Koji Usui
  • Publication number: 20230150466
    Abstract: Provided is an electric parking brake device which enables a service brake that generates a brake force in accordance with an operation input of a vehicle user and a parking brake that generates a brake force with the function of an electric actuator having operation controlled by a control unit to be obtained. The control unit (C) starts to count in response to an end of detection of the service brake by service brake detection means (66) and stops operation of the control unit (C) after an elapse of a first predetermined time from the start of the count. With this configuration, the load on a battery can be reduced by preventing the control unit from being kept activated for a period of time that is longer than necessary.
    Type: Application
    Filed: December 18, 2020
    Publication date: May 18, 2023
    Inventors: Koji USUI, Sandip PURANE, Hiromu NARUKAWA, Takeshi SAKAGUCHI, Masato UNO
  • Publication number: 20230147075
    Abstract: An electric parking brake device for a vehicle, including: a drum brake arranged on a radially inner side of a rim portion; and an electric actuator which enables obtaining a parking brake state by driving the drum brake, the electric actuator being mounted to a side surface of a back plate on an inner side in a vehicle-width direction. An ice and snow accumulation suppressing member (54) including a wall portion (54a), which extends from the back plate to the inner side in the vehicle-width direction while facing an inner peripheral surface of the rim portion (40b) and which is arranged at least below an anchor portion (21), is mounted to an outer peripheral edge portion of the back plate (13). With this configuration, collision of ice and snow refrozen in a wheel with the electric actuator can be prevented.
    Type: Application
    Filed: November 27, 2020
    Publication date: May 11, 2023
    Inventors: Hiroo KAWAKAMI, Koji USUI, Naotoshi NAKAJIMA
  • Patent number: 11400908
    Abstract: In an electric parking brake device in which a parking brake state is released by loosening a brake cable: a nut is screwed onto a screw shaft in such a way as to be capable of moving in an axial direction; a movement restricting portion which is caused to abut the screw shaft or a linked member that moves in the axial direction together with the screw shaft, thereby restricting an axial direction movement end of the screw shaft to the side loosening the brake cable, is disposed in a fixed position inside an actuator case; and a resilient member which is compressed in response to axial direction movement of the nut after movement restriction has been effected by the movement restricting portion when the screw shaft moves in the axial direction toward the side loosening the brake cable is interposed between the nut and an insertion member.
    Type: Grant
    Filed: December 6, 2018
    Date of Patent: August 2, 2022
    Assignee: Hitachi Astemo, Ltd.
    Inventor: Koji Usui
  • Patent number: 10994673
    Abstract: A vehicle includes a roof molding made of an elastic member disposed in a groove on a roof top surface formed in a coupling portion coupling a roof panel and a right side panel. The roof molding includes a lid portion covering an upper side of an opening portion of the groove. The roof panel includes a slope face descending toward the groove between a base face and the groove. An end of the lid portion of the roof molding extends to the slope face and is in contact with the slope face.
    Type: Grant
    Filed: August 14, 2019
    Date of Patent: May 4, 2021
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hiroyuki Manjo, Tomoharu Tamaya, Koji Usui
  • Publication number: 20210016756
    Abstract: In an electric parking brake device in which a parking brake state is released by loosening a brake cable: a nut is screwed onto a screw shaft in such a way as to be capable of moving in an axial direction; a movement restricting portion which is caused to abut the screw shaft or a linked member that moves in the axial direction together with the screw shaft, thereby restricting an axial direction movement end of the screw shaft to the side loosening the brake cable, is disposed in a fixed position inside an actuator case; and a resilient member which is compressed in response to axial direction movement of the nut after movement restriction has been effected by the movement restricting portion when the screw shaft moves in the axial direction toward the side loosening the brake cable is interposed between the nut and an insertion member.
    Type: Application
    Filed: December 6, 2018
    Publication date: January 21, 2021
    Inventor: Koji USUI
  • Publication number: 20210016762
    Abstract: In an electric parking brake device configured in such a way that a parking brake state resulting from pulling of a brake cable is released by loosening the brake cable, the brake cable is formed by twisting together a plurality of wires in such a way as to generate a twisting force in a fixed direction when pulled, and the direction in which the twisting force generated by the brake cable in a pulled state acts on a screw shaft is set to be the same direction as the direction in which a nut is rotated to loosen the brake cable. This makes it possible to reduce an operating sound and to reduce wear of members constituting a rotation restricting device.
    Type: Application
    Filed: December 6, 2018
    Publication date: January 21, 2021
    Inventor: Koji USUI
  • Publication number: 20200309215
    Abstract: Provided is an electric parking brake device in which an actuator case of an electric actuator is mounted to a backplate of a drum brake which includes a parking brake lever, with which electric actuator it is possible to obtain a parking brake state by pulling a brake cable linked with the parking brake lever. The backplate is formed with a through-hole for passing the brake cable and has a connecting tube portion integrally protruding therefrom and enclosing the through-hole. A mounting tube includes, on one end in an axial direction, a joint portion which is formed separately from the backplate and joined to the connecting tube portion. The actuator case is mounted to the mounting tube at certain axial and circumferential positions with respect to the mounting tube. This allows increased freedom of the mounting attitude of the electric actuator with respect to the backplate without increased cost.
    Type: Application
    Filed: October 18, 2018
    Publication date: October 1, 2020
    Inventor: Koji USUI
  • Publication number: 20200070741
    Abstract: A vehicle includes a roof molding made of an elastic member disposed in a groove on a roof top surface formed in a coupling portion coupling a roof panel and a right side panel. The roof molding includes a lid portion covering an upper side of an opening portion of the groove. The roof panel includes a slope face descending toward the groove between a base face and the groove. An end of the lid portion of the roof molding extends to the slope face and is in contact with the slope face.
    Type: Application
    Filed: August 14, 2019
    Publication date: March 5, 2020
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hiroyuki MANJO, Tomoharu TAMAYA, Koji USUI
  • Patent number: 10138966
    Abstract: One embodiment provides a vehicle brake apparatus, including: an electric actuator; and a drum brake. The drum brake is attached to a wheel so as to be driven by power exhibited by the electric actuator. In a state of being mounted on a vehicle, the electric actuator is disposed and fixed further rearwards than an axle of the wheel.
    Type: Grant
    Filed: March 10, 2015
    Date of Patent: November 27, 2018
    Assignee: NISSIN KOGYO CO., LTD.
    Inventors: Koji Usui, Toshiaki Mitani, Hiroo Kawakami, Akira Hiratsuka
  • Patent number: 9586465
    Abstract: A connecting structure includes: a molding having a fixed portion that is fixed on an inner surface of a lower edge of a windshield glass, and a fitting portion that receives an engagement rib that protrudes downward from a location near an upper edge of a cowl louver, wherein the engagement rib and the fitting portion include slip-out prevention projections that prevent the engagement rib from slipping out. On both sides of the engagement rib are provided elastic lips and that are supported by the fitting portion, and these elastic lips extend in the extending direction of the engagement rib and press on the engagement rib at a side closer to a tip of the engagement rib than the slip-out prevention projections, these elastic lips press each other in opposite directions.
    Type: Grant
    Filed: September 3, 2014
    Date of Patent: March 7, 2017
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Akiyoshi Sanada, Koji Usui, Eiji Nishikawa, Yasuhiko Fukuzumi, Kentaro Nakashima
  • Publication number: 20160176276
    Abstract: A connecting structure includes: a molding having a fixed portion that is fixed on an inner surface of a lower edge of a windshield glass, and a fitting portion that receives an engagement rib that protrudes downward from a location near an upper edge of a cowl louver, wherein the engagement rib and the fitting portion include slip-out prevention projections that prevent the engagement rib from slipping out. On both sides of the engagement rib are provided elastic lips and that are supported by the fitting portion, and these elastic lips extend in the extending direction of the engagement rib and press on the engagement rib at a side closer to a tip of the engagement rib than the slip-out prevention projections, these elastic lips press each other in opposite directions.
    Type: Application
    Filed: September 3, 2014
    Publication date: June 23, 2016
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Akiyoshi SANADA, Koji USUI, Eiji NISHIKAWA, Yasuhiko FUKUZUMI, Kentaro NAKASHIMA
  • Publication number: 20150260245
    Abstract: One embodiment provides a vehicle brake apparatus, including: an electric actuator; and a drum brake. The drum brake is attached to a wheel so as to be driven by power exhibited by the electric actuator. In a state of being mounted on a vehicle, the electric actuator is disposed and fixed further rearwards than an axle of the wheel.
    Type: Application
    Filed: March 10, 2015
    Publication date: September 17, 2015
    Inventors: Koji USUI, Toshiaki MITANI, Hiroo KAWAKAMI, Akira HIRATSUKA