Patents by Inventor Hidetoshi Hana
Hidetoshi Hana 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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Publication number: 20230271497Abstract: A traveling transmission device of a tractor including a transmission case to which power from an engine is inputted via an input shaft, a speed changer transmission section provided inside the transmission case and configured to input power from the input shaft and to speed-change the inputted power and output it, and a rear wheel differential mechanism provided inside the transmission case and configured to input power outputted from the speed changer transmission section and transmit the inputted power to left and right rear wheels. The speed changer transmission section includes a plurality of speed changer sections configured to speed-change power from the input shaft by a gear coupling mechanism and a multiple-disc clutch and output it, and, inside the transmission case, an oil feeding pipe extends upwardly of the speed changer transmission section and a discharge nozzle connects to respective portions of the plurality of speed changer sections.Type: ApplicationFiled: May 5, 2023Publication date: August 31, 2023Applicant: KUBOTA CORPORATIONInventors: Tomonari TSUCHIDA, Ryoma IWASE, Tomoyuki TANAKA, Takahiro MATSUO, Hidetoshi HANA
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Publication number: 20230249545Abstract: A work vehicle is provided with a support member that supports an output shaft of a wheel differential mechanism between a differential case and a planetary reduction mechanism. The support member is configured to engage the output shaft relatively immovably in a direction along the axis of the output shaft.Type: ApplicationFiled: April 21, 2023Publication date: August 10, 2023Applicant: KUBOTA CORPORATIONInventors: Hidetoshi HANA, Tomoya UNO, Katsuhiko HONDA, Yusuke SHIMOGAMI, Yutaka INUBUSHI
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Patent number: 11718173Abstract: Provided are a speed changer device, a forward/reverse switchover device for converting output of the speed changer device into forward traveling power and reverse traveling power, a rear wheel differential mechanism for inputting output of the forward/reverse switchover device and transmitting it to rear wheels, and a gear transmission mechanism for transmitting power of an output shaft of the forward/reverse switchover device to an input shaft of the rear wheel differential mechanism. A transmission case is separable into a front case portion accommodating the speed changer device and a rear case portion accommodating the forward/reverse switchover device, the rear wheel differential mechanism and the gear transmission mechanism. The gear transmission mechanism is detachably provided at a portion of the inside of the transmission case which portion corresponds to a front end portion of the rear case portion.Type: GrantFiled: September 22, 2020Date of Patent: August 8, 2023Assignee: KUBOTA CORPORATIONInventors: Tomonari Tsuchida, Ryoma Iwase, Tomoyuki Tanaka, Takahiro Matsuo, Hidetoshi Hana
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Patent number: 11679672Abstract: A work vehicle is provided with a support member that supports an output shaft of a wheel differential mechanism between a differential case and a planetary reduction mechanism. The support member is configured to engage the output shaft relatively immovably in a direction along the axis of the output shaft.Type: GrantFiled: October 5, 2020Date of Patent: June 20, 2023Assignee: KUBOTA CORPORATIONInventors: Hidetoshi Hana, Tomoya Uno, Katsuhiko Honda, Yusuke Shimogami, Yutaka Inubushi
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Patent number: 11592082Abstract: A work vehicle transmission includes a first transmission mechanism that changes input motive power to any one of multiple speeds, and a second transmission mechanism that changes the motive power changed by the first transmission mechanism to any one of multiple speeds, the number of speeds of the second transmission mechanism being smaller than that of the first transmission mechanism. Multiple speed change multi-disc clutches of the first transmission mechanism are arranged parallel with multiple deceleration multi-disc clutches of the second transmission mechanism so as to be adjacent in the diameter direction thereof.Type: GrantFiled: November 19, 2020Date of Patent: February 28, 2023Assignee: Kubota CorporationInventors: Hidetoshi Hana, Tomonari Tsuchida, Noriaki Takewa, Satoshi Yoshikawa, Kazuya Maeda
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Patent number: 11261951Abstract: A shift power transmission apparatus of a tractor that has a small up-down width or a small transverse width and a short front-rear length. A shift output unit is located further toward a vehicle rear side than a combined planetary power transmission unit. A planetary unit output axis and a shift unit input axis are coaxial with each other.Type: GrantFiled: November 20, 2018Date of Patent: March 1, 2022Assignee: Kubota CorporationInventors: Tomonari Tsuchida, Hidetoshi Hana, Ryoma Iwase
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Publication number: 20210332875Abstract: A shift power transmission apparatus of a tractor that has a small up-down width or a small transverse width and a short front-rear length. A shift output unit is located further toward a vehicle rear side than a combined planetary power transmission unit. A planetary unit output axis and a shift unit input axis are coaxial with each other.Type: ApplicationFiled: November 20, 2018Publication date: October 28, 2021Inventors: Tomonari Tsuchida, Hidetoshi Hana, Ryoma Iwase
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Publication number: 20210178895Abstract: A work vehicle is provided with a support member that supports an output shaft of a wheel differential mechanism between a differential case and a planetary reduction mechanism. The support member is configured to engage the output shaft relatively immovably in a direction along the axis of the output shaft.Type: ApplicationFiled: October 5, 2020Publication date: June 17, 2021Applicant: KUBOTA CORPORATIONInventors: Hidetoshi HANA, Tomoya UNO, Katsuhiko HONDA, Yusuke SHIMOGAMI, Yutaka INUBUSHI
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Publication number: 20210094416Abstract: Provided are a speed changer device, a forward/reverse switchover device for converting output of the speed changer device into forward traveling power and reverse traveling power, a rear wheel differential mechanism for inputting output of the forward/reverse switchover device and transmitting it to rear wheels, and a gear transmission mechanism for transmitting power of an output shaft of the forward/reverse switchover device to an input shaft of the rear wheel differential mechanism. A transmission case is separable into a front case portion accommodating the speed changer device and a rear case portion accommodating the forward/reverse switchover device, the rear wheel differential mechanism and the gear transmission mechanism. The gear transmission mechanism is detachably provided at a portion of the inside of the transmission case which portion corresponds to a front end portion of the rear case portion.Type: ApplicationFiled: September 22, 2020Publication date: April 1, 2021Applicant: KUBOTA CORPORATIONInventors: Tomonari TSUCHIDA, Ryoma IWASE, Tomoyuki TANAKA, Takahiro MATSUO, Hidetoshi HANA
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Publication number: 20210071740Abstract: A work vehicle transmission includes a first transmission mechanism that changes input motive power to any one of multiple speeds, and a second transmission mechanism that changes the motive power changed by the first transmission mechanism to any one of multiple speeds, the number of speeds of the second transmission mechanism being smaller than that of the first transmission mechanism. Multiple speed change multi-disc clutches of the first transmission mechanism are arranged parallel with multiple deceleration multi-disc clutches of the second transmission mechanism so as to be adjacent in the diameter direction thereof.Type: ApplicationFiled: November 19, 2020Publication date: March 11, 2021Inventors: Hidetoshi Hana, Tomonari Tsuchida, Noriaki Takewa, Satoshi Yoshikawa, Kazuya Maeda
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Patent number: 10935109Abstract: A work vehicle transmission includes a first transmission mechanism that changes input motive power to any one of multiple speeds, and a second transmission mechanism that changes the motive power changed by the first transmission mechanism to any one of multiple speeds, the number of speeds of the second transmission mechanism being smaller than that of the first transmission mechanism. Multiple speed change multi-disc clutches of the first transmission mechanism are arranged parallel with multiple deceleration multi-disc clutches of the second transmission mechanism so as to be adjacent in the diameter direction thereof.Type: GrantFiled: June 6, 2018Date of Patent: March 2, 2021Assignee: Kubota CorporationInventors: Hidetoshi Hana, Tomonari Tsuchida, Noriaki Takewa, Satoshi Yoshikawa, Kazuya Maeda
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Publication number: 20180372188Abstract: A work vehicle transmission includes a first transmission mechanism that changes input motive power to any one of multiple speeds, and a second transmission mechanism that changes the motive power changed by the first transmission mechanism to any one of multiple speeds, the number of speeds of the second transmission mechanism being smaller than that of the first transmission mechanism. Multiple speed change multi-disc clutches of the first transmission mechanism are arranged parallel with multiple deceleration multi-disc clutches of the second transmission mechanism so as to be adjacent in the diameter direction thereof.Type: ApplicationFiled: June 6, 2018Publication date: December 27, 2018Inventors: Hidetoshi Hana, Tomonari Tsuchida, Noriaki Takewa, Satoshi Yoshikawa, Kazuya Maeda
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Patent number: 9945464Abstract: A transmission apparatus D that can avoid size-up of a starter through reduction of load torque required at the time of start-up of an engine, includes a traveling transmission device D1 configured to transmit power outputted from an engine 3a via a forward/reverse switching mechanism 50 acting also as a main clutch mechanism, a hydrostatic stepless speed changer mechanism 20 acting as a main speed changer mechanism, a planetary gear mechanism 40 and an auxiliary speed changer mechanism 60 to traveling components such as front wheels 1, rear wheels 2, etc., and an implement transmission device D2 configured to transmit the power outputted from the engine 3a via an implement clutch 70, an implement speed changer mechanism 71, and a PTO shaft 7 to an implement.Type: GrantFiled: April 18, 2016Date of Patent: April 17, 2018Assignee: Kubota CorporationInventors: Yuji Hirase, Hidetoshi Hana, Tsuyoshi Gono
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Patent number: 9561789Abstract: A hybrid work vehicle is provided with an internal combustion engine for supplying driving force to a running device and a work implement via a transmission shaft, a motor generator for assisting the internal combustion engine by outputting power to the transmission shaft, and a battery for receiving charging electricity from the motor generator and giving driving electricity to the motor generator. A load information generation unit generates load information indicating a rotational load received by the internal combustion engine when in a constant-speed control mode for maintaining a constant number of revolutions of the internal combustion engine, based on an input parameter, and an assistance calculation unit calculates an amount of assistance for internal combustion engine by the motor generator, based on the load information when in the constant-speed control mode.Type: GrantFiled: August 27, 2012Date of Patent: February 7, 2017Assignee: Kubota CorporationInventors: Keishiro Nishi, Hidetoshi Hana, Atsushi Shinkai, Hisao Mukai, Michita Kono, Yushi Matsuzaki, Yoshitomo Fujimoto, Susumu Umemoto, Shigeki Hayashi, Norio Obata, Toshikazu Kawamoto, Nobushige Ichikawa
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Publication number: 20160312872Abstract: A transmission apparatus D that can avoid size-up of a starter through reduction of load torque required at the time of start-up of an engine, includes a traveling transmission device D1 configured to transmit power outputted from an engine 3a via a forward/reverse switching mechanism 50 acting also as a main clutch mechanism, a hydrostatic stepless speed changer mechanism 20 acting as a main speed changer mechanism, a planetary gear mechanism 40 and an auxiliary speed changer mechanism 60 to traveling components such as front wheels 1, rear wheels 2, etc., and an implement transmission device D2 configured to transmit the power outputted from the engine 3a via an implement clutch 70, an implement speed changer mechanism 71, and a PTO shaft 7 to an implement.Type: ApplicationFiled: April 18, 2016Publication date: October 27, 2016Inventors: Yuji Hirase, Hidetoshi Hana, Tsuyoshi Gono
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Publication number: 20140148984Abstract: A hybrid work vehicle is provided with an internal combustion engine for supplying driving force to a running device and a work implement via a transmission shaft, a motor generator for assisting the internal combustion engine by outputting power to the transmission shaft, and a battery for receiving charging electricity from the motor generator and giving driving electricity to the motor generator. A load information generation unit generates load information indicating a rotational load received by the internal combustion engine when in a constant-speed control mode for maintaining a constant number of revolutions of the internal combustion engine, based on an input parameter, and an assistance calculation unit calculates an amount of assistance for internal combustion engine by the motor generator, based on the load information when in the constant-speed control mode.Type: ApplicationFiled: August 27, 2012Publication date: May 29, 2014Applicant: KUBOTA CORPORATIONInventors: Keishiro Nishi, Hidetoshi Hana, Atsushi Shinkai, Hisao Mukai, Michita Kono, Yushi Matsuzaki, Yoshitomo Fujimoto, Susumu Umemoto, Shigeki Hayashi, Norio Obata, Toshikazu Kawamoto, Nobushige Ichikawa
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Patent number: 8657713Abstract: A power train for a tractor includes an engine power transmission shaft extending along the longitudinal direction of the vehicle body rearwardly of an engine, and a hydrostatic stepless speed changer unit (HST) configured to input power from the engine. A pump and a motor of the HST are juxtaposed along the transverse direction of the vehicle body. A planetary gear unit is disposed rearwardly of the HST in the longitudinal direction of the vehicle body. The planetary gear unit is configured to input power from the engine via the engine power transmission shaft and power from the HST and to output a traveling power. A branch transmission mechanism is disposed forwardly of the HST in the longitudinal direction of the vehicle body and configured to transmit the power from the engine to an input shaft of the pump and to the engine power transmission shaft in distribution.Type: GrantFiled: March 18, 2011Date of Patent: February 25, 2014Assignee: Kubota CorporationInventors: Hidetoshi Hana, Hiroaki Nakagawa
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Publication number: 20120046138Abstract: A power train for a tractor includes an engine power transmission shaft extending along the longitudinal direction of the vehicle body rearwardly of an engine, and a hydrostatic stepless speed changer unit (HST) configured to input power from the engine. A pump and a motor of the HST are juxtaposed along the transverse direction of the vehicle body. A planetary gear unit is disposed rearwardly of the HST in the longitudinal direction of the vehicle body. The planetary gear unit is configured to input power from the engine via the engine power transmission shaft and power from the HST and to output a traveling power. A branch transmission mechanism is disposed forwardly of the HST in the longitudinal direction of the vehicle body and configured to transmit the power from the engine to an input shaft of the pump and to the engine power transmission shaft in distribution.Type: ApplicationFiled: March 18, 2011Publication date: February 23, 2012Applicant: KUBOTA CORPORATIONInventors: Hidetoshi Hana, Hiroaki Nakagawa
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Patent number: 6851328Abstract: A transmission control apparatus includes transmission lines disposed between a pair of transmission shafts and a hydraulic multiple disc transmission clutch disposed on one side of the transmission lines. Power from an engine is transmitted via one of the transmission lines to a traveling unit. Each of the transmission lines has a friction clutch. A first gear mechanism operated by a first actuator is disposed between one of the transmission shafts and the first transmission line. A second gear mechanism operated by a second actuator is disposed between one of the transmission shafts and the second transmission line. When the first transmission line is powered, a first system operates the second gear mechanism into a speed position; the first clutch to a non-transmitting state and the second clutch to a transmitting state, thereby providing a progressive shifting of the transmission clutch from a transmitting state to a semi-transmitting state.Type: GrantFiled: March 26, 2003Date of Patent: February 8, 2005Assignee: Kubota CorporationInventors: Susumu Umemoto, Tetsuo Yamaguchi, Hidetoshi Hana, Isamu Kawai, Takashi Yasumi, Yoshifumi Horiuchi, Tetsu Fukui
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Publication number: 20030226416Abstract: A control apparatus (64) for a transmission.Type: ApplicationFiled: March 26, 2003Publication date: December 11, 2003Applicant: KUBOTA CORPORATIONInventors: Susumu Umemoto, Tetsuo Yamaguchi, Hidetoshi Hana, Isamu Kawai, Takashi Yasumi, Yoshifumi Horiuchi, Tetsu Fukui