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).
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Patent number: 11970149Abstract: 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: GrantFiled: June 4, 2021Date of Patent: April 30, 2024Assignee: Isuzu Motors LimitedInventor: Takefumi Okamoto
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Patent number: 11859712Abstract: 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: GrantFiled: March 24, 2020Date of Patent: January 2, 2024Assignee: Isuzu Motors LimitedInventor: Takefumi Okamoto
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Patent number: 11761533Abstract: 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: GrantFiled: March 24, 2020Date of Patent: September 19, 2023Assignee: ISUZU MOTORS LIMITEDInventor: Takefumi Okamoto
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Publication number: 20230202433Abstract: 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: ApplicationFiled: June 4, 2021Publication date: June 29, 2023Applicant: Isuzu Motors LimitedInventor: Takefumi OKAMOTO
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Publication number: 20220170542Abstract: 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: ApplicationFiled: March 24, 2020Publication date: June 2, 2022Inventor: Takefumi OKAMOTO
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Publication number: 20220154817Abstract: 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: ApplicationFiled: March 24, 2020Publication date: May 19, 2022Inventor: Takefumi OKAMOTO
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Patent number: 10975935Abstract: 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: GrantFiled: November 17, 2017Date of Patent: April 13, 2021Assignee: ISUZU MOTORS LIMITEDInventors: Kouhei Akashi, Takefumi Okamoto
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Publication number: 20190368578Abstract: 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: ApplicationFiled: November 17, 2017Publication date: December 5, 2019Inventors: Kouhei AKASHI, Takefumi OKAMOTO
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Patent number: 6460669Abstract: 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: GrantFiled: February 8, 2001Date of Patent: October 8, 2002Assignee: Isuzu Motors LimitedInventors: Eiji Inoue, Hidetaka Koga, Atsushi Yanazaki, Takefumi Okamoto
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Publication number: 20010017064Abstract: 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: ApplicationFiled: February 8, 2001Publication date: August 30, 2001Inventors: Eiji Inoue, Nobuyuki Iwao, Atsushi Yamazaki, Yasushi Yamamoto, Takefumi Okamoto
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Publication number: 20010017248Abstract: 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: ApplicationFiled: February 8, 2001Publication date: August 30, 2001Inventors: Eiji Inoue, Hidetaka Koga, Atsushi Yanazaki, Takefumi Okamoto