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).
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Patent number: 11859678Abstract: 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: GrantFiled: May 20, 2022Date of Patent: January 2, 2024Assignee: KUBOTA CORPORATIONInventors: Kohei Horai, Yoshihiko Kuroshita
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Publication number: 20230019973Abstract: 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: ApplicationFiled: September 14, 2022Publication date: January 19, 2023Applicant: KUBOTA CORPORATIONInventors: Takashi KOSAKI, Takuya INAMORI, Yoshihiko KUROSHITA, Michita KONO, Yuji IMANAGA
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Patent number: 11541951Abstract: 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: GrantFiled: October 27, 2020Date of Patent: January 3, 2023Assignee: KUBOTA CORPORATIONInventors: Takashi Kosaki, Takuya Inamori, Yoshihiko Kuroshita, Michita Kono, Yuji Imanaga
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Publication number: 20220397165Abstract: 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: ApplicationFiled: May 20, 2022Publication date: December 15, 2022Applicant: KUBOTA CORPORATIONInventors: Kohei HORAI, Yoshihiko KUROSHITA
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Patent number: 11399454Abstract: 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: GrantFiled: July 20, 2020Date of Patent: August 2, 2022Assignee: KUBOTA CORPORATIONInventors: Shunsuke Miyashita, Kenichi Iwami, Hiroki Suga, Yuki Kubota, Toru Tambo, Kunihiko Nishino, Yasuaki Morioka, Kumiko Kobayashi, Misako Kawai, Manabu Togo, Yoshihiko Kuroshita
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Patent number: 11388853Abstract: 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: GrantFiled: May 17, 2019Date of Patent: July 19, 2022Assignee: KUBOTA CORPORATIONInventors: Tetsuo Yamaguchi, Yoshihiko Kuroshita, Hitoshi Azuma, Michita Kono, Shinji Ohara
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Patent number: 11268614Abstract: 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: GrantFiled: June 5, 2020Date of Patent: March 8, 2022Assignee: KUBOTA CORPORATIONInventors: Yoshihiko Kuroshita, Tetsuo Yamaguchi, Michita Kono, Hitoshi Azuma, Shinji Ohara
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Patent number: 11247557Abstract: 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: GrantFiled: June 5, 2020Date of Patent: February 15, 2022Assignee: KUBOTA CORPORATIONInventors: Hitoshi Azuma, Tetsuo Yamaguchi, Shinji Ohara, Yoshihiko Kuroshita, Michita Kono
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Publication number: 20210139089Abstract: 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: ApplicationFiled: October 27, 2020Publication date: May 13, 2021Applicant: KUBOTA CORPORATIONInventors: Takashi KOSAKI, Takuya INAMORI, Yoshihiko KUROSHITA, Michita KONO, Yuji IMANAGA
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Publication number: 20200391589Abstract: 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: ApplicationFiled: June 5, 2020Publication date: December 17, 2020Inventors: Hitoshi AZUMA, Tetsuo YAMAGUCHI, Shinji OHARA, Yoshihiko KUROSHITA, Michita KONO
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Publication number: 20200393041Abstract: 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: ApplicationFiled: June 5, 2020Publication date: December 17, 2020Inventors: Yoshihiko KUROSHITA, Tetsuo YAMAGUCHI, Michita KONO, Hitoshi AZUMA, Shinji OHARA
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Publication number: 20200383261Abstract: 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: ApplicationFiled: July 20, 2020Publication date: December 10, 2020Inventors: Shunsuke MIYASHITA, Kenichi IWAMI, Hiroki SUGA, Yuki KUBOTA, Toru TAMBO, Kunihiko NISHINO, Yasuaki MORIOKA, Kumiko KOBAYASHI, Misako KAWAI, Manabu TOGO, Yoshihiko KUROSHITA
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Patent number: 10569783Abstract: 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: GrantFiled: June 9, 2017Date of Patent: February 25, 2020Assignee: KUBOTA CORPORATIONInventors: Yoshihiko Kuroshita, Susumu Umemoto, Yoshitomo Fujimoto, Takashi Kobayashi
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Publication number: 20190350121Abstract: 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: ApplicationFiled: May 17, 2019Publication date: November 21, 2019Applicant: KUBOTA CORPORATIONInventors: Tetsuo YAMAGUCHI, Yoshihiko KUROSHITA, Hitoshi AZUMA, Michita KONO, Shinji OHARA
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Patent number: 10151081Abstract: 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: GrantFiled: May 25, 2016Date of Patent: December 11, 2018Assignee: Kubota CorporationInventors: Yoshihiko Kuroshita, Masahiro Sugioka, Daisuke Hashimoto
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Publication number: 20170355372Abstract: 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: ApplicationFiled: June 9, 2017Publication date: December 14, 2017Applicant: KUBOTA CORPORATIONInventors: Yoshihiko KUROSHITA, Susumu UMEMOTO, Yoshitomo FUJIMOTO, Takashi KOBAYASHI
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Publication number: 20170016209Abstract: 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: ApplicationFiled: May 25, 2016Publication date: January 19, 2017Inventors: Yoshihiko Kuroshita, Masahiro Sugioka, Daisuke Hashimoto
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Patent number: 9308819Abstract: 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: GrantFiled: January 14, 2014Date of Patent: April 12, 2016Assignee: Kubota CorporationInventors: Hiroo Fujimoto, Issei Tanimura, Yoshihiko Kuroshita
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Publication number: 20140129110Abstract: 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: ApplicationFiled: January 14, 2014Publication date: May 8, 2014Applicant: Kuboto CorporationInventors: Hiroo Fujimoto, Issei Tanimura, Yoshihiko Kuroshita
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Patent number: 8676467Abstract: 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: GrantFiled: March 15, 2012Date of Patent: March 18, 2014Assignee: Kubota CorporationInventors: Hiroo Fujimoto, Issei Tanimura, Yoshihiko Kuroshita