Patents by Inventor Yoshihiko Kuroshita

Yoshihiko Kuroshita 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: 11859678
    Abstract: A working vehicle includes: a clutch displaceable to a connected state in which power is transmitted to a drive, a disconnected state in which the transmission is disconnected, and a half-clutch state in which power is slidably and partly transmitted to the drive; a detector that detects an operation position of a clutch pedal and outputs a detected value corresponding to the operation position detected; a control device that brings the clutch into the half-clutch state if the detected value corresponds with a threshold, and brings the clutch into the disconnected state if the detected value is less than the threshold and into the connected state if the detected value is greater than the threshold, and vice versa; and a change unit that changes the threshold to a different value in accordance with an operation on the operation member.
    Type: Grant
    Filed: May 20, 2022
    Date of Patent: January 2, 2024
    Assignee: KUBOTA CORPORATION
    Inventors: Kohei Horai, Yoshihiko Kuroshita
  • Publication number: 20230019973
    Abstract: A working vehicle includes an operator seat and an armrest arranged on a side of the operator seat. The armrest includes an upper surface on which an operation tool arrangement portion is arranged, the operation tool arrangement portion arranging an operation tool, and a side surface having a concave portion. The concave portion is located on an area overlapping, in a front-to-back direction, with another area including the operation tool arrangement portion.
    Type: Application
    Filed: September 14, 2022
    Publication date: January 19, 2023
    Applicant: KUBOTA CORPORATION
    Inventors: Takashi KOSAKI, Takuya INAMORI, Yoshihiko KUROSHITA, Michita KONO, Yuji IMANAGA
  • Patent number: 11541951
    Abstract: A working vehicle includes an operator seat, an armrest arranged on a side of the operator seat, and a speed shifter to change a traveling speed. The armrest includes an operation lever to be swung back and forth to cause the speed shifter to perform acceleration and deceleration, and an operation switch to be pressed to cause the speed shifter to perform acceleration and deceleration.
    Type: Grant
    Filed: October 27, 2020
    Date of Patent: January 3, 2023
    Assignee: KUBOTA CORPORATION
    Inventors: Takashi Kosaki, Takuya Inamori, Yoshihiko Kuroshita, Michita Kono, Yuji Imanaga
  • Publication number: 20220397165
    Abstract: A working vehicle includes: a clutch displaceable to a connected state in which power is transmitted to a drive, a disconnected state in which the transmission is disconnected, and a half-clutch state in which power is slidably and partly transmitted to the drive; a detector that detects an operation position of a clutch pedal and outputs a detected value corresponding to the operation position detected; a control device that brings the clutch into the half-clutch state if the detected value corresponds with a threshold, and brings the clutch into the disconnected state if the detected value is less than the threshold and into the connected state if the detected value is greater than the threshold, and vice versa; and a change unit that changes the threshold to a different value in accordance with an operation on the operation member.
    Type: Application
    Filed: May 20, 2022
    Publication date: December 15, 2022
    Applicant: KUBOTA CORPORATION
    Inventors: Kohei HORAI, Yoshihiko KUROSHITA
  • Patent number: 11399454
    Abstract: A working vehicle includes a vehicle body to travel, a steering handle to be turned to steer the vehicle body, and a steering switch to steer the vehicle body separately from the steering handle. The steering switch may be a switch to be operated in a pressing manner or in a sliding manner to steer the vehicle body. In addition, the steering switch may be arranged around the steering handle.
    Type: Grant
    Filed: July 20, 2020
    Date of Patent: August 2, 2022
    Assignee: KUBOTA CORPORATION
    Inventors: Shunsuke Miyashita, Kenichi Iwami, Hiroki Suga, Yuki Kubota, Toru Tambo, Kunihiko Nishino, Yasuaki Morioka, Kumiko Kobayashi, Misako Kawai, Manabu Togo, Yoshihiko Kuroshita
  • Patent number: 11388853
    Abstract: A vehicle includes; a vehicle body on which the motor is mounted; an apparatus provided to the traveling vehicle body and also driven by drive power from the motor; an apparatus that performs work on a field; an apparatus that changes the speed of drive power input from the motor and transmits the drive power; a tool that includes speed change stages and is also capable of speed change operation of the speed change apparatus by human operation; a controller that, when the number of speed change stages is changed based on human operation of the speed change operation tool, outputs to the speed change apparatus a speed change command for each predefined number of stages and is also capable of outputting the speed change command for each defined speed change interval; and an operation mechanism that enables adjustment of the speed change interval.
    Type: Grant
    Filed: May 17, 2019
    Date of Patent: July 19, 2022
    Assignee: KUBOTA CORPORATION
    Inventors: Tetsuo Yamaguchi, Yoshihiko Kuroshita, Hitoshi Azuma, Michita Kono, Shinji Ohara
  • Patent number: 11268614
    Abstract: A working vehicle includes a traveling clutch to be switched between an engaging state and a disengaging state, a brake to brake the traveling device according to an operation of a brake operator, and a controller to perform a braking control to perform the braking, and an auto-switching controller to switch the traveling clutch from the engaging state to the disengaging state. The controller performs a first processing to switch the traveling clutch from the engaging state to the disengaging state when the brake operator is operated in a case where the auto-switching control is valid and a vehicle speed is less than a threshold, and a second processing to prevent the traveling clutch from being switched from the engaging state to the disengaging state even when the brake operator is operated in a case where the vehicle speed is equal to or higher than the threshold.
    Type: Grant
    Filed: June 5, 2020
    Date of Patent: March 8, 2022
    Assignee: KUBOTA CORPORATION
    Inventors: Yoshihiko Kuroshita, Tetsuo Yamaguchi, Michita Kono, Hitoshi Azuma, Shinji Ohara
  • Patent number: 11247557
    Abstract: A working vehicle includes a PTO shaft to transmit power of a propulsion shaft, a PTO clutch including a first rotor to be rotated by the power of the propulsion shaft, a second rotor to transmit the power to the PTO shaft, a press to be moved by a pressure of operation fluid between an engaging side on which the first rotor is engaged with the second rotor and a disengaging side, and a PTO brake to brake the PTO shaft when the press is positioned on the disengaging side, a control valve to control the pressure of the operation fluid to be applied to the PTO clutch, a rate setter to set a reducing rate at which the pressure of the operation fluid is reduced, and a controller to control the control valve based on the reducing rate.
    Type: Grant
    Filed: June 5, 2020
    Date of Patent: February 15, 2022
    Assignee: KUBOTA CORPORATION
    Inventors: Hitoshi Azuma, Tetsuo Yamaguchi, Shinji Ohara, Yoshihiko Kuroshita, Michita Kono
  • Publication number: 20210139089
    Abstract: A working vehicle includes an operator seat, an armrest arranged on a side of the operator seat, and a speed shifter to change a traveling speed. The armrest includes an operation lever to be swung back and forth to cause the speed shifter to perform acceleration and deceleration, and an operation switch to be pressed to cause the speed shifter to perform acceleration and deceleration.
    Type: Application
    Filed: October 27, 2020
    Publication date: May 13, 2021
    Applicant: KUBOTA CORPORATION
    Inventors: Takashi KOSAKI, Takuya INAMORI, Yoshihiko KUROSHITA, Michita KONO, Yuji IMANAGA
  • Publication number: 20200391589
    Abstract: A working vehicle includes a PTO shaft to transmit power of a propulsion shaft, a PTO clutch including a first rotor to be rotated by the power of the propulsion shaft, a second rotor to transmit the power to the PTO shaft, a press to be moved by a pressure of operation fluid between an engaging side on which the first rotor is engaged with the second rotor and a disengaging side, and a PTO brake to brake the PTO shaft when the press is positioned on the disengaging side, a control valve to control the pressure of the operation fluid to be applied to the PTO clutch, a rate setter to set a reducing rate at which the pressure of the operation fluid is reduced, and a controller to control the control valve based on the reducing rate.
    Type: Application
    Filed: June 5, 2020
    Publication date: December 17, 2020
    Inventors: Hitoshi AZUMA, Tetsuo YAMAGUCHI, Shinji OHARA, Yoshihiko KUROSHITA, Michita KONO
  • Publication number: 20200393041
    Abstract: A working vehicle includes a traveling clutch to be switched between an engaging state and a disengaging state, a brake to brake the traveling device according to an operation of a brake operator, and a controller to perform a braking control to perform the braking, and an auto-switching controller to switch the traveling clutch from the engaging state to the disengaging state. The controller performs a first processing to switch the traveling clutch from the engaging state to the disengaging state when the brake operator is operated in a case where the auto-switching control is valid and a vehicle speed is less than a threshold, and a second processing to prevent the traveling clutch from being switched from the engaging state to the disengaging state even when the brake operator is operated in a case where the vehicle speed is equal to or higher than the threshold.
    Type: Application
    Filed: June 5, 2020
    Publication date: December 17, 2020
    Inventors: Yoshihiko KUROSHITA, Tetsuo YAMAGUCHI, Michita KONO, Hitoshi AZUMA, Shinji OHARA
  • Publication number: 20200383261
    Abstract: A working vehicle includes a vehicle body to travel, a steering handle to be turned to steer the vehicle body, and a steering switch to steer the vehicle body separately from the steering handle. The steering switch may be a switch to be operated in a pressing manner or in a sliding manner to steer the vehicle body. In addition, the steering switch may be arranged around the steering handle.
    Type: Application
    Filed: July 20, 2020
    Publication date: December 10, 2020
    Inventors: Shunsuke MIYASHITA, Kenichi IWAMI, Hiroki SUGA, Yuki KUBOTA, Toru TAMBO, Kunihiko NISHINO, Yasuaki MORIOKA, Kumiko KOBAYASHI, Misako KAWAI, Manabu TOGO, Yoshihiko KUROSHITA
  • Patent number: 10569783
    Abstract: Work vehicle having a coupling member which is switchable between a coupled state where left/right brake operation tools are integrally coupled and a released state releasing the coupling. A coupled state detector is utilized. A controller controls a traveling state and is switchable between a first or normal mode and a second or vehicle speed suppression mode. The second or vehicle speed suppression mode can be switched back to the first or normal mode when the coupled state is detected and a predetermined releasing operation is performed.
    Type: Grant
    Filed: June 9, 2017
    Date of Patent: February 25, 2020
    Assignee: KUBOTA CORPORATION
    Inventors: Yoshihiko Kuroshita, Susumu Umemoto, Yoshitomo Fujimoto, Takashi Kobayashi
  • Publication number: 20190350121
    Abstract: A vehicle includes; a vehicle body on which the motor is mounted; an apparatus provided to the traveling vehicle body and also driven by drive power from the motor; an apparatus that performs work on a field; an apparatus that changes the speed of drive power input from the motor and transmits the drive power; a tool that includes speed change stages and is also capable of speed change operation of the speed change apparatus by human operation; a controller that, when the number of speed change stages is changed based on human operation of the speed change operation tool, outputs to the speed change apparatus a speed change command for each predefined number of stages and is also capable of outputting the speed change command for each defined speed change interval; and an operation mechanism that enables adjustment of the speed change interval.
    Type: Application
    Filed: May 17, 2019
    Publication date: November 21, 2019
    Applicant: KUBOTA CORPORATION
    Inventors: Tetsuo YAMAGUCHI, Yoshihiko KUROSHITA, Hitoshi AZUMA, Michita KONO, Shinji OHARA
  • Patent number: 10151081
    Abstract: Disclosed is a work vehicle adapted to mount a front work implement operated under a forward facing posture and a rear work implement operated under a reverse facing posture. A forward/reverse operational unit includes a first operational tool operable by one hand of a driver under the reverse facing posture and a second operational tool operable by the one hand engaged in operation of the first operational tool.
    Type: Grant
    Filed: May 25, 2016
    Date of Patent: December 11, 2018
    Assignee: Kubota Corporation
    Inventors: Yoshihiko Kuroshita, Masahiro Sugioka, Daisuke Hashimoto
  • Publication number: 20170355372
    Abstract: Work vehicle having a coupling member which is switchable between a coupled state where left/right brake operation tools are integrally coupled and a released state releasing the coupling. A coupled state detector is utilized. A controller controls a traveling state and is switchable between a first or normal mode and a second or vehicle speed suppression mode. The second or vehicle speed suppression mode can be switched back to the first or normal mode when the coupled state is detected and a predetermined releasing operation is performed.
    Type: Application
    Filed: June 9, 2017
    Publication date: December 14, 2017
    Applicant: KUBOTA CORPORATION
    Inventors: Yoshihiko KUROSHITA, Susumu UMEMOTO, Yoshitomo FUJIMOTO, Takashi KOBAYASHI
  • Publication number: 20170016209
    Abstract: Disclosed is a work vehicle adapted to mount a front work implement operated under a forward facing posture and a rear work implement operated under a reverse facing posture. A forward/reverse operational unit includes a first operational tool operable by one hand of a driver under the reverse facing posture and a second operational tool operable by the one hand engaged in operation of the first operational tool.
    Type: Application
    Filed: May 25, 2016
    Publication date: January 19, 2017
    Inventors: Yoshihiko Kuroshita, Masahiro Sugioka, Daisuke Hashimoto
  • Patent number: 9308819
    Abstract: A speed change control system includes a speed change control section for setting a speed change value of a stepless speed change device; a speed change operational tool for providing the speed change control section with a speed change command the stepless speed change device; a constant speed travel operational device for providing the speed change control section with a changing command for changing a constant speed mode speed change value which is a speed change value at the time of the constant speed mode, a shifting command for shifting to the constant speed mode and a departing command for departing from the constant speed mode; and a constant speed travel management section which causes the speed change control section to execute the constant speed mode with the constant speed mode speed change value, based on the shifting command from the constant speed travel operational device.
    Type: Grant
    Filed: January 14, 2014
    Date of Patent: April 12, 2016
    Assignee: Kubota Corporation
    Inventors: Hiroo Fujimoto, Issei Tanimura, Yoshihiko Kuroshita
  • Publication number: 20140129110
    Abstract: A speed change control system includes a speed change control section for setting a speed change value of a stepless speed change device; a speed change operational tool for providing the speed change control section with a speed change command the stepless speed change device; a constant speed travel operational device for providing the speed change control section with a changing command for changing a constant speed mode speed change value which is a speed change value at the time of the constant speed mode, a shifting command for shifting to the constant speed mode and a departing command for departing from the constant speed mode; and a constant speed travel management section which causes the speed change control section to execute the constant speed mode with the constant speed mode speed change value, based on the shifting command from the constant speed travel operational device.
    Type: Application
    Filed: January 14, 2014
    Publication date: May 8, 2014
    Applicant: Kuboto Corporation
    Inventors: Hiroo Fujimoto, Issei Tanimura, Yoshihiko Kuroshita
  • Patent number: 8676467
    Abstract: A speed change control system includes a speed change control section for setting a speed change value of a stepless speed change device; a speed change operational tool for providing the speed change control section with a speed change command the stepless speed change device; a constant speed travel operational device for providing the speed change control section with a changing command for changing a constant speed mode speed change value which is a speed change value at the time of the constant speed mode, a shifting command for shifting to the constant speed mode and a departing command for departing from the constant speed mode; and a constant speed travel management section which causes the speed change control section to execute the constant speed mode with the constant speed mode speed change value, based on the shifting command from the constant speed travel operational device.
    Type: Grant
    Filed: March 15, 2012
    Date of Patent: March 18, 2014
    Assignee: Kubota Corporation
    Inventors: Hiroo Fujimoto, Issei Tanimura, Yoshihiko Kuroshita