Patents by Inventor Keishiro Nishi
Keishiro Nishi 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: 8944199Abstract: The present invention provides a working vehicle, including a power source unit, an air intake passage, and an air exhaust passage all of which are arranged inside a roof portion, wherein the power source unit is disposed in a portion close to a center in a vehicle body width direction, the air intake passage guides air taken from an air intake port that is provided in a center portion in the vehicle body width direction, to the power source unit, and the air exhaust passage is bent in a planar view such that air supplied to the power source unit flows in a bent manner toward an air exhaust port that is provided in one end portion in the vehicle body width direction.Type: GrantFiled: March 6, 2013Date of Patent: February 3, 2015Assignee: Kubota CorporationInventors: Tomofumi Fukunaga, Keishiro Nishi, Hiroo Fujimoto
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Patent number: 8758199Abstract: A load control system for a work vehicle including set rotation speed detection means for detecting a set rotation speed of an engine of the work vehicle, actual rotation speed detection means that senses an actual rotation speed of the engine, a continuously variable speed change device that receives power from the engine of the work vehicle, speed change position detecting means for detecting a speed change operating position of the continuously variable speed change device, operating means for speed-shifting the continuously variable speed change device, and control means for controlling the operation of the operating means.Type: GrantFiled: March 11, 2013Date of Patent: June 24, 2014Assignee: Kubota CorporationInventors: Eiji Nishi, Atsushi Shinkai, Keishiro Nishi, Yasunobu Nakatani
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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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Publication number: 20140083784Abstract: The present invention provides a working vehicle, including a power source unit, an air intake passage, and an air exhaust passage all of which are arranged inside a roof portion, wherein the power source unit is disposed in a portion close to a center in a vehicle body width direction, the air intake passage guides air taken from an air intake port that is provided in a center portion in the vehicle body width direction, to the power source unit, and the air exhaust passage is bent in a planar view such that air supplied to the power source unit flows in a bent manner toward an air exhaust port that is provided in one end portion in the vehicle body width direction.Type: ApplicationFiled: March 6, 2013Publication date: March 27, 2014Applicant: KUBOTA CORPORATIONInventors: Tomofumi Fukunaga, Keishiro Nishi, Hiroo Fujimoto
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Patent number: 8579070Abstract: A speed changer lever and a lift lever are supported to a lever supporting structure that extends from the front end of an armrest disposed laterally of a driver's eat to the forward side of the vehicle body. A speed changer lever guide face portion is provided at a transversely inner portion of an upwardly oriented face of the lever supporting structure. A lift lever guide face portion is provided at a transversely outer portion of the upwardly oriented face of the ever supporting structure. The lift lever guide face portion is set at a disposing height lower than the speed changer lever guide face portion. An upper end of the lift lever is set at a disposing height lower than the upper end of the speed changer lever. A speed changer lever guide groove and a lift lever guide groove are disposed parallel to each other.Type: GrantFiled: March 18, 2011Date of Patent: November 12, 2013Assignee: Kubota CorporationInventors: Keishiro Nishi, Akiyoshi Ono
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Publication number: 20130268170Abstract: A load control system for a work vehicle including set rotation speed detection means for detecting a set rotation speed of an engine of the work vehicle, actual rotation speed detection means that senses an actual rotation speed of the engine, a continuously variable speed change device that receives power from the engine of the work vehicle, speed change position detecting means for detecting a speed change operating position of the continuously variable speed change device, operating means for speed-shifting the continuously variable speed change device, and control means for controlling the operation of the operating means.Type: ApplicationFiled: March 11, 2013Publication date: October 10, 2013Inventors: Eiji Nishi, Atsushi Shinkai, Keishiro Nishi, Yasunobu Nakatani
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Patent number: 8414454Abstract: A load control system for a work vehicle including set rotation speed detection means for detecting a set rotation speed of an engine of the work vehicle, actual rotation speed detection means that senses an actual rotation speed of the engine, a continuously variable speed change device that receives power from the engine of the work vehicle, speed change position detecting means for detecting a speed change operating position of the continuously variable speed change device, operating means for speed-shifting the continuously variable speed change device, and control means for controlling the operation of the operating means.Type: GrantFiled: June 13, 2012Date of Patent: April 9, 2013Assignee: Kubota CorporationInventors: Eiji Nishi, Keishiro Nishi, Atsushi Shinkai, Yasunobu Nakatani
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Publication number: 20120271519Abstract: A load control system for a work vehicle including set rotation speed detection means for detecting a set rotation speed of an engine of the work vehicle, actual rotation speed detection means that senses an actual rotation speed of the engine, a continuously variable speed change device that receives power from the engine of the work vehicle, speed change position detecting means for detecting a speed change operating position of the continuously variable speed change device, operating means for speed-shifting the continuously variable speed change device, and control means for controlling the operation of the operating means.Type: ApplicationFiled: June 13, 2012Publication date: October 25, 2012Applicant: KUBOTA CORPORATIONInventors: Eiji Nishi, Keishiro Nishi, Atsushi Shinkai, Yasunobu Nakatani
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Patent number: 8206264Abstract: A load control structure for a work vehicle comprises: set rotation speed detection device for detecting a set rotation of an engine of the work vehicle; actual rotation speed detection device that senses an actual rotational speed of the engine; continuously variable speed change device that receives power from an engine of the work vehicle; speed change position detecting device for detecting a speed change operation position of the continuously variable speed change device; operating device for speed-shifting the continuously variable speed change device; control device for controlling the operation of the operating device; wherein the control device calculates a drop amount of the actual engine rotation speed from the set rotation speed based on the detected information from the set rotation speed detection device and the actual rotation speed detection device, and sets a limit operation position for the continuously variable speed change device based on the calculated drop amount and a correlation data tType: GrantFiled: July 8, 2011Date of Patent: June 26, 2012Assignee: Kubota CorporationInventors: Eiji Nishi, Keishiro Nishi, Atsushi Shinkai, Yasunobu Nakatani
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Publication number: 20120073895Abstract: A speed changer lever and a lift lever are supported to a lever supporting structure that extends from the front end of an armrest disposed laterally of a driver's eat to the forward side of the vehicle body. A speed changer lever guide face portion is provided at a transversely inner portion of an upwardly oriented face of the lever supporting structure. A lift lever guide face portion is provided at a transversely outer portion of the upwardly oriented face of the ever supporting structure. The lift lever guide face portion is set at a disposing height lower than the speed changer lever guide face portion. An upper end of the lift lever is set at a disposing height lower than the upper end of the speed changer lever. A speed changer lever guide groove and a lift lever guide groove are disposed parallel to each other.Type: ApplicationFiled: March 18, 2011Publication date: March 29, 2012Applicant: KUBOTA CORPORATIONInventors: Keishiro Nishi, Akiyoshi Ono
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Publication number: 20110264351Abstract: A load control structure for a work vehicle comprises: set rotation speed detection device for detecting a set rotation of an engine of the work vehicle; actual rotation speed detection device that senses an actual rotational speed of the engine; continuously variable speed change device that receives power from an engine of the work vehicle; speed change position detecting device for detecting a speed change operation position of the continuously variable speed change device; operating device for speed-shifting the continuously variable speed change device; control device for controlling the operation of the operating device; wherein the control device calculates a drop amount of the actual engine rotation speed from the set rotation speed based on the detected information from the set rotation speed detection device and the actual rotation speed detection device, and sets a limit operation position for the continuously variable speed change device based on the calculated drop amount and a correlation data tType: ApplicationFiled: July 8, 2011Publication date: October 27, 2011Applicant: Kubota CorporationInventors: Eiji Nishi, Keishiro Nishi, Atsushi Shinkai, Yasunobu Nakatani
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Patent number: 7980994Abstract: A load control structure for a work vehicle comprises: set rotation speed detection device for detecting a set rotation of an engine of the work vehicle; actual rotation speed detection device that senses an actual rotational speed of the engine; continuously variable speed change device that receives power from an engine of the work vehicle; speed change position detecting device for detecting a speed change operation position of the continuously variable speed change device; operating device for speed-shifting the continuously variable speed change device; control device for controlling the operation of the operating device; wherein the control device calculates a drop amount of the actual engine rotation speed from the set rotation speed based on the detected information from the set rotation speed detection device and the actual rotation speed detection device, and sets a limit operation position for the continuously variable speed change device based on the calculated drop amount and a correlation data tType: GrantFiled: February 25, 2010Date of Patent: July 19, 2011Assignee: Kubota CorporationInventors: Eiji Nishi, Keishiro Nishi, Atsushi Shinkai, Yasunobu Nakatani
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Publication number: 20100152981Abstract: A load control structure for a work vehicle comprises: set rotation speed detection device for detecting a set rotation of an engine of the work vehicle; actual rotation speed detection device that senses an actual rotational speed of the engine; continuously variable speed change device that receives power from an engine of the work vehicle; speed change position detecting device for detecting a speed change operation position of the continuously variable speed change device; operating device for speed-shifting the continuously variable speed change device; control device for controlling the operation of the operating device; wherein the control device calculates a drop amount of the actual engine rotation speed from the set rotation speed based on the detected information from the set rotation speed detection device and the actual rotation speed detection device, and sets a limit operation position for the continuously variable speed change device based on the calculated drop amount and a correlation data tType: ApplicationFiled: February 25, 2010Publication date: June 17, 2010Applicant: KUBOTA CORPORATIONInventors: Eiji Nishi, Keishiro Nishi, Atsushi Shinkai, Yasunobu Nakatani
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Patent number: 7686737Abstract: A load control structure for a work vehicle comprises: set rotation speed detection device for detecting a set rotation of an engine of the work vehicle; actual rotation speed detection device that senses an actual rotational speed of the engine; continuously variable speed change device that receives power from an engine of the work vehicle; speed change position detecting device for detecting a speed change operation position of the continuously variable speed change device; operating device for speed-shifting the continuously variable speed change device; control device for controlling the operation of the operating device; wherein the control device calculates a drop amount of the actual engine rotation speed from the set rotation speed based on the detected information from the set rotation speed detection device and the actual rotation speed detection device, and sets a limit operation position for the continuously variable speed change device based on the calculated drop amount and a correlation data tType: GrantFiled: September 7, 2006Date of Patent: March 30, 2010Assignee: Kubota CorporationInventors: Eiji Nishi, Keishiro Nishi, Atsushi Shinkai, Yasunobu Nakatani
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Patent number: 7613560Abstract: A speed control structure for a work vehicle comprises: a speed change operating element for manipulation by an operator; a device for detecting operated position of the speed change operating element; a continuously variable speed change device that receives power from an engine of the work vehicle; speed change position detecting device for detecting a speed change operation position of the continuously variable speed change device; operating device for speed-shifting the continuously variable speed change device; control device for controlling the operating means, wherein the control means: sets a target speed change operating position based on detected information by the operated position detection device and a predetermined correlation data that correlates the operated position of the speed change operating element and the speed change operation position of the continuously variable speed change device, and calculates a deviation between the target speed change operating position and of the continuouslyType: GrantFiled: September 7, 2006Date of Patent: November 3, 2009Assignee: Kubota CorporationInventors: Eiji Nishi, Keishiro Nishi, Atsushi Shinkai, Yasunobu Nakatani
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Patent number: 7469534Abstract: A load control structure for a work vehicle comprises: a device for detecting operating position of a manually operated speed change operating element; an engine load detection device for detecting load on an engine of the work vehicle; a swash plate position detecting device for detecting an operating position of a swash plate of a variable displacement pump of a hydrostatic continuously variable speed change device; a pump operating device for steplessly operating the swash plate of the variable displacement pump; a motor operating device for operating a swash plate of a variable displacement motor of the hydrostatic continuously variable speed change device between at least two speed change positions including a higher speed position and a lower speed position; a control device for controlling the operations of the pump operating device and the motor operating device.Type: GrantFiled: September 13, 2006Date of Patent: December 30, 2008Assignee: Kubota CorporationInventors: Eiji Nishi, Keishiro Nishi, Atsushi Shinkai, Yasunobu Nakatani, Muneji Okamoto, Yoichi Sugihara
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Patent number: 7337866Abstract: A work vehicle includes an engine, a PTO shaft driven by power from the engine, an operator's seat, an operator's presence sensor for detecting presence/absence of an operator at the operator's seat, and an automatic engine stop unit operable to automatically stop the engine in response to detection of the operator's absence at the operator's seat. The work vehicle includes a utility member for the vehicle selectively movable between a use position and a non-use position, a non-use state detecting sensor for detecting movement of the utility member to the non-use position, and an override unit operable to override the automatic engine stop function of the automatic engine stop unit, the override unit providing an override signal to the automatic engine stop unit in response to detection by the non-use state detecting sensor of the movement of the utility member to the non-use position.Type: GrantFiled: January 4, 2006Date of Patent: March 4, 2008Assignee: Kubota CorporationInventors: Keishiro Nishi, Masao Takagi, Satoshi Machida, Kenji Kato, Masashi Osuga
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Publication number: 20070137338Abstract: A speed control structure for a work vehicle comprises: a speed change operating element for manipulation by an operator; a device for detecting operated position of the speed change operating element; a continuously variable speed change device that receives power from an engine of the work vehicle; speed change position detecting device for detecting a speed change operation position of the continuously variable speed change device; operating device for speed-shifting the continuously variable speed change device; control device for controlling the operating means, wherein the control means: sets a target speed change operating position based on detected information by the operated position detection device and a predetermined correlation data that correlates the operated position of the speed change operating element and the speed change operation position of the continuously variable speed change device, and calculates a deviation between the target seed change operating position and of the continuously vType: ApplicationFiled: September 7, 2006Publication date: June 21, 2007Applicant: Kubota CorporationInventors: Eiji Nishi, Keishiro Nishi, Atsushi Shinkai, Yasunobu Nakatani
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Publication number: 20070078041Abstract: A load control structure for a work vehicle comprises: set rotation speed detection device for detecting a set rotation of an engine of the work vehicle; actual rotation speed detection device that senses an actual rotational speed of the engine; continuously variable speed change device that receives power from an engine of the work vehicle; speed change position detecting device for detecting a speed change operation position of the continuously variable speed change device; operating device for speed-shifting the continuously variable speed change device; control device for controlling the operation of the operating device; wherein the control device calculates a drop amount of the actual engine rotation speed from the set rotation speed based on the detected information from the set rotation speed detection device and the actual rotation speed detection device, and sets a limit operation position for the continuously variable speed change device based on the calculated drop amount and a correlation data tType: ApplicationFiled: September 7, 2006Publication date: April 5, 2007Applicant: Kubota CorporationInventors: Eiji Nishi, Keishiro Nishi, Atsushi Shinkai, Yasunobu Nakatani
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Publication number: 20070068152Abstract: A load control structure for a work vehicle comprises: a device for detecting operating position of a manually operated speed change operating element; an engine load detection device for detecting load on an engine of the work vehicle; a swash plate position detecting device for detecting an operating position of a swash plate of a variable displacement pump of a hydrostatic continuously variable speed change device; a pump operating device for steplessly operating the swash plate of the variable displacement pump; a motor operating device for operating a swash plate of a variable displacement motor of the hydrostatic continuously variable speed change device between at least two speed change positions including a higher speed position and a lower speed position; a control device for controlling the operations of the pump operating device and the motor operating device.Type: ApplicationFiled: September 13, 2006Publication date: March 29, 2007Applicant: Kuboto CorporationInventors: Eiji Nishi, Keishiro Nishi, Atsushi Shinkai, Yasunobu Nakatani, Muneji Okamoto, Yoichi Sugihara