Patents by Inventor Takefumi Okamoto

Takefumi Okamoto 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: 11970149
    Abstract: A rotation restriction control device comprises a selection unit that selects a rotation restriction state, on the basis of a road surface when parking a vehicle traveling on the road surface, and a control unit that controls a rotation restriction state of a restriction mechanism in accordance with a selection result from the selection unit when parking the vehicle.
    Type: Grant
    Filed: June 4, 2021
    Date of Patent: April 30, 2024
    Assignee: Isuzu Motors Limited
    Inventor: Takefumi Okamoto
  • Patent number: 11859712
    Abstract: An automatic transmission equipped with: a plurality of rotary shafts, including an output shaft for outputting driving force; a plurality of gears, including an output-side gear provided on the output shaft; a plurality of synchronization mechanisms, including an output-side synchronization mechanism for coupling the output shaft and the output-side gear; a shift position detection unit for detecting which of a plurality of shift positions, including a neutral position and a neutral position, has been selected; and a control unit for activating a synchronization mechanism other than the output-side synchronization mechanism and coupling a rotary shaft other than the output shaft and a gear other than the output-side gear when the shift position detection unit has detected the neutral position or a parking position.
    Type: Grant
    Filed: March 24, 2020
    Date of Patent: January 2, 2024
    Assignee: Isuzu Motors Limited
    Inventor: Takefumi Okamoto
  • Patent number: 11761533
    Abstract: An automatic transmission of the present invention is provided with: a plurality of rotating shafts; a plurality of gears; a plurality of synchronizing mechanisms including an output-side synchronizing mechanism; a lubricating oil storage part that stores a lubricating oil which is drawn upward by rotation of the gears; a shift position detection unit that detects which of a plurality of shift positions, including a neutral position, has been selected; and a control unit which, if the neutral position has been detected by the shift position detection unit, causes a synchronizing mechanism other than the output-side synchronizing mechanism to operate, and brings a clutch into a connected state after coupling a rotating shaft other than an output shaft and a gear other than an output-side gear.
    Type: Grant
    Filed: March 24, 2020
    Date of Patent: September 19, 2023
    Assignee: ISUZU MOTORS LIMITED
    Inventor: Takefumi Okamoto
  • Publication number: 20230202433
    Abstract: A rotation restriction control device comprises a selection unit that selects a rotation restriction state, on the basis of a road surface when parking a vehicle traveling on the road surface, and a control unit that controls a rotation restriction state of a restriction mechanism in accordance with a selection result from the selection unit when parking the vehicle.
    Type: Application
    Filed: June 4, 2021
    Publication date: June 29, 2023
    Applicant: Isuzu Motors Limited
    Inventor: Takefumi OKAMOTO
  • Publication number: 20220170542
    Abstract: An automatic transmission of the present invention is provided with: a plurality of rotating shafts; a plurality of gears; a plurality of synchronizing mechanisms including an output-side synchronizing mechanism; a lubricating oil storage part that stores a lubricating oil which is drawn upward by rotation of the gears; a shift position detection unit that detects which of a plurality of shift positions, including a neutral position, has been selected; and a control unit which, if the neutral position has been detected by the shift position detection unit, causes a synchronizing mechanism other than the output-side synchronizing mechanism to operate, and brings a clutch into a connected state after coupling a rotating shaft other than an output shaft and a gear other than an output-side gear.
    Type: Application
    Filed: March 24, 2020
    Publication date: June 2, 2022
    Inventor: Takefumi OKAMOTO
  • Publication number: 20220154817
    Abstract: An automatic transmission equipped with: a plurality of rotary shafts, including an output shaft for outputting driving force; a plurality of gears, including an output-side gear provided on the output shaft; a plurality of synchronization mechanisms, including an output-side synchronization mechanism for coupling the output shaft and the output-side gear; a shift position detection unit for detecting which of a plurality of shift positions, including a neutral position and a neutral position, has been selected; and a control unit for activating a synchronization mechanism other than the output-side synchronization mechanism and coupling a rotary shaft other than the output shaft and a gear other than the output-side gear when the shift position detection unit has detected the neutral position or a parking position.
    Type: Application
    Filed: March 24, 2020
    Publication date: May 19, 2022
    Inventor: Takefumi OKAMOTO
  • Patent number: 10975935
    Abstract: A dual clutch-type transmission includes a first clutch, a second clutch, a first input shaft, a second input shaft, an output shaft, a first countershaft, a second countershaft, a first input gear train, a second input gear train, a first output gear train, a second output gear train, a third output gear train, a first synchronization mechanism, a second synchronization mechanism, and a third synchronization mechanism.
    Type: Grant
    Filed: November 17, 2017
    Date of Patent: April 13, 2021
    Assignee: ISUZU MOTORS LIMITED
    Inventors: Kouhei Akashi, Takefumi Okamoto
  • Publication number: 20190368578
    Abstract: A dual clutch-type transmission includes a first clutch, a second clutch, a first input shaft, a second input shaft, an output shaft, a first countershaft, a second countershaft, a first input gear train, a second input gear train, a first output gear train, a second output gear train, a third output gear train, a first synchronization mechanism, a second synchronization mechanism, and a third synchronization mechanism.
    Type: Application
    Filed: November 17, 2017
    Publication date: December 5, 2019
    Inventors: Kouhei AKASHI, Takefumi OKAMOTO
  • Patent number: 6460669
    Abstract: A power driving device comprises a fluid coupling operated by an engine, a wet-type friction clutch disposed between said fluid coupling and a transmission, and a fluid operation means for circulating the operation fluid through said fluid coupling and for feeding the operation fluid to the wet-type friction clutch. In the pump housing of the fluid operation means, there is disposed a hydraulic pump that works as a source of hydraulic pressure, there are formed passages for communicating said hydraulic pump with said fluid coupling and with said wet-type friction clutch, and there are disposed a relief valve for adjusting the pressure of the operation fluid blown out from the hydraulic pump, a control valve for changing over the passage communicated with the fluid coupling and a control valve for changing over the passage communicated with the wet-type friction clutch.
    Type: Grant
    Filed: February 8, 2001
    Date of Patent: October 8, 2002
    Assignee: Isuzu Motors Limited
    Inventors: Eiji Inoue, Hidetaka Koga, Atsushi Yanazaki, Takefumi Okamoto
  • Publication number: 20010017064
    Abstract: A driving device for vehicles, which comprises an engine mounted on a vehicle, a fluid coupling operated by said engine, and a friction clutch disposed between said fluid coupling and a transmission, wherein the friction clutch is composed of a multi-plate clutch.
    Type: Application
    Filed: February 8, 2001
    Publication date: August 30, 2001
    Inventors: Eiji Inoue, Nobuyuki Iwao, Atsushi Yamazaki, Yasushi Yamamoto, Takefumi Okamoto
  • Publication number: 20010017248
    Abstract: A power driving device comprises a fluid coupling operated by an engine, a wet-type friction clutch disposed between said fluid coupling and a transmission, and a fluid operation means for circulating the operation fluid through said fluid coupling and for feeding the operation fluid to the wet-type friction clutch. In the pump housing of the fluid operation means, there is disposed a hydraulic pump that works as a source of hydraulic pressure, there are formed passages for communicating said hydraulic pump with said fluid coupling and with said wet-type friction clutch, and there are disposed a relief valve for adjusting the pressure of the operation fluid blown out from the hydraulic pump, a control valve for changing over the passage communicated with the fluid coupling and a control valve for changing over the passage communicated with the wet-type friction clutch.
    Type: Application
    Filed: February 8, 2001
    Publication date: August 30, 2001
    Inventors: Eiji Inoue, Hidetaka Koga, Atsushi Yanazaki, Takefumi Okamoto