Patents by Inventor Katsuhiro Tsutsumi
Katsuhiro Tsutsumi 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: 10612210Abstract: A ladder includes: a front connecting member and a rear connecting member at a top step, respective upper ends of which are connected to a lateral side of a vehicle body in a pivotally movable manner and are juxtaposed with a predetermined space therebetween in a vehicle front-back direction; a front connecting member and a rear connecting member which are provided at a step under the top step, and respective upper ends of which are connected in a pivotally movable manner to both ends in the vehicle front-back direction of a step board. The front connecting member and the rear connecting member at least at the top step among steps positioned above a lowest step are rigid members. The front connecting member and the rear connecting member at the lowest step among steps positioned under the top step are elastically deformable.Type: GrantFiled: March 23, 2015Date of Patent: April 7, 2020Assignee: Komatsu Ltd.Inventors: Katsuhiro Tsutsumi, Takehito Takahashi
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Publication number: 20180044884Abstract: A ladder includes: a front connecting member and a rear connecting member at a top step, respective upper ends of which are connected to a lateral side of a vehicle body in a pivotally movable manner and are juxtaposed with a predetermined space therebetween in a vehicle front-back direction; a front connecting member and a rear connecting member which are provided at a step under the top step, and respective upper ends of which are connected in a pivotally movable manner to both ends in the vehicle front-back direction of a step board. The front connecting member and the rear connecting member at least at the top step among steps positioned above a lowest step are rigid members. The front connecting member and the rear connecting member at the lowest step among steps positioned under the top step are elastically deformable.Type: ApplicationFiled: March 23, 2015Publication date: February 15, 2018Inventors: Katsuhiro Tsutsumi, Takehito Takahashi
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Patent number: 9856625Abstract: A working vehicle includes: a vehicle body; and a boom; a bucket; a boom driving unit including a boom cylinder; a bucket driving unit configured to swing the bucket; a boom-bottom pressure sensor configured to detect a boom-bottom pressure of the boom cylinder; and a working equipment controller configured to control at least one of a lift motion of the boom and a tilt motion of the bucket. The bucket includes an inclined portion. The working equipment controller controls the lift motion or the tilt motion by comparing a threshold set in accordance with an inclination angle of the inclined portion with the boom-bottom pressure.Type: GrantFiled: August 7, 2015Date of Patent: January 2, 2018Assignee: Komatsu Ltd.Inventors: Minoru Wada, Toshiyuki Ohta, Toshimitsu Honda, Katsuhiro Tsutsumi, Takaya Kobayashi, Yosuke Yamagoe
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Patent number: 9732494Abstract: A bucket with a linear lower front edge includes: a first straight portion horizontally extending from the lower front edge toward an innermost of the bucket; an inclined portion continuous with a rear edge of the first straight portion, the inclined portion further extending toward the innermost of the bucket while being inclined upward; a curve continuous with a rear edge of the inclined portion at a lower edge of the curve, the curve having a predetermined bucket radius; a second straight portion continuous with an upper edge of the curve, the second straight portion being inclined upward toward a bucket opening; and a third straight portion bent at a bent portion toward the bucket opening relative to a front edge of the second straight portion, the third straight portion further extending toward the bucket opening.Type: GrantFiled: July 15, 2015Date of Patent: August 15, 2017Assignee: Komatsu Ltd.Inventors: Toshimitsu Honda, Toshiyuki Ohta, Minoru Wada, Katsuhiro Tsutsumi, Takaya Kobayashi
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Patent number: 9719229Abstract: A bucket with a blade-shaped lower front edge includes: a first straight portion horizontally extending from the lower front edge toward an innermost of the bucket; a curve continuous with a rear edge of the first straight portion at a lower edge of the curve, the curve having a predetermined bucket radius; a second straight portion continuous with an upper edge of the curve, the second straight portion being inclined upward toward a bucket opening; a third straight portion bent at a bent portion toward the bucket opening relative to a front edge of the second straight portion, the third straight portion further extending toward the bucket opening; a reinforcing member provided on an exterior surface of the third straight portion to reinforce of the exterior surface; and a connecting portion provided behind the curve.Type: GrantFiled: July 15, 2015Date of Patent: August 1, 2017Assignee: Komatsu Ltd.Inventors: Norihito Bandou, Takeshi Saoyama, Minoru Wada, Toshiyuki Ohta, Toshimitsu Honda, Katsuhiro Tsutsumi, Takaya Kobayashi, Takayasu Wakamoto
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Patent number: 9688204Abstract: A ladder in a multi-step structure includes: first front and rear connecting members that are connected to a vehicle body and between a wheel and an end of the vehicle body and that are juxtaposed with a predetermined space; a first step board that is connected between respective lower ends of the first front and rear connecting members; second front and rear connecting members, respective upper ends of which are connected to both ends of the first step board; and a second step board that is connected between respective lower ends of the second front and rear connecting members. In the first front and rear connecting members, one near the wheel is fixed to the vehicle body and the other near the end of the vehicle body is connected in a pivotally movable manner to the vehicle body and is foldable.Type: GrantFiled: March 23, 2015Date of Patent: June 27, 2017Assignee: KOMATSU LTD.Inventors: Katsuhiro Tsutsumi, Takehito Takahashi
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Publication number: 20170037594Abstract: A working vehicle (1) includes: a vehicle body (2); and a boom (31); a bucket (32); a boom driving unit including a boom cylinder (36); a bucket driving unit configured to swing the bucket (32); a boom-bottom pressure sensor (460) configured to detect a boom-bottom pressure of the boom cylinder (36); and a working equipment controller (10) configured to control at least one of a lift motion of the boom (31) and a tilt motion of the bucket (32). The bucket (32) includes an inclined portion (44). The working equipment controller (10) controls the lift motion or the tilt motion by comparing a threshold set in accordance with an inclination angle of the inclined portion (44) with the boom-bottom pressure.Type: ApplicationFiled: August 7, 2015Publication date: February 9, 2017Inventors: Minoru Wada, Toshiyuki Ohta, Toshimitsu Honda, Katsuhiro Tsutsumi, Takaya Kobayashi, Yosuke Yamagoe
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Publication number: 20170016203Abstract: A bucket with a linear lower front edge includes: a first straight portion horizontally extending from the lower front edge toward an innermost of the bucket; an inclined portion continuous with a rear edge of the first straight portion, the inclined portion further extending toward the innermost of the bucket while being inclined upward; a curve continuous with a rear edge of the inclined portion at a lower edge of the curve, the curve having a predetermined bucket radius; a second straight portion continuous with an upper edge of the curve, the second straight portion being inclined upward toward a bucket opening; and a third straight portion bent at a bent portion toward the bucket opening relative to a front edge of the second straight portion, the third straight portion further extending toward the bucket opening.Type: ApplicationFiled: July 15, 2015Publication date: January 19, 2017Inventors: Toshimitsu Honda, Toshiyuki Ohta, Minoru Wada, Katsuhiro Tsutsumi, Takaya Kobayashi
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Publication number: 20170016204Abstract: A bucket with a blade-shaped lower front edge includes: a first straight portion horizontally extending from the lower front edge toward an innermost of the bucket; a curve continuous with a rear edge of the first straight portion at a lower edge of the curve, the curve having a predetermined bucket radius; a second straight portion continuous with an upper edge of the curve, the second straight portion being inclined upward toward a bucket opening; a third straight portion bent at a bent portion toward the bucket opening relative to a front edge of the second straight portion, the third straight portion further extending toward the bucket opening; a reinforcing member provided on an exterior surface of the third straight portion to reinforce of the exterior surface; and a connecting portion provided behind the curve.Type: ApplicationFiled: July 15, 2015Publication date: January 19, 2017Applicant: KOMATSU LTD.Inventors: Norihito Bandou, Takeshi Saoyama, Minoru Wada, Toshiyuki Ohta, Toshimitsu Honda, Katsuhiro Tsutsumi, Takaya Kobayashi, Takayasu Wakamoto
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Patent number: 9518491Abstract: An exhaust gas aftertreatment device provided to an upper portion of an engine includes a right and left pair of first and second aftertreatment units, into which exhaust gas from the engine dividedly flows, each including a first exhaust gas emission control system on an upstream side, a second exhaust gas emission control system on a downstream side and a communication pipe through which the first and second systems are in communication with each other, the first and second systems, while being arranged side by side in a right-and-left direction, being oriented so that a flow direction of the exhaust gas flowing therein is parallel with a front-and-rear direction. When the device is seen in the front-and-rear direction, an outer linear envelope tangent to the first system and the communication pipe of each of the units extends upward while tilting toward a right-and-left center of the engine.Type: GrantFiled: June 19, 2013Date of Patent: December 13, 2016Assignee: KOMATSU LTD.Inventors: Katsuhiro Tsutsumi, Hirofumi Miyamoto
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Patent number: 9476337Abstract: Two sets of assemblies are arranged such that a diesel particulate filter device of the assembly, a selective catalytic reduction device of the assembly, a selective catalytic reduction device of the assembly, and a diesel particulate filter device of the assembly are located next to each other in this order. Exhaust tubes are provided to extend upward from gas outlets of the selective catalytic reduction device of the assembly and the selective catalytic reduction device of the assembly. The two exhaust tubes are located on a virtual plane orthogonal to longitudinal directions of the selective catalytic reduction devices of the assemblies. Thereby, an air intake position for an engine can be easily set to a position from which exhaust gas from the engine is less likely to be taken in, in a configuration provided with two sets of assemblies.Type: GrantFiled: May 14, 2013Date of Patent: October 25, 2016Assignee: KOMATSU LTD.Inventors: Tsuyoshi Kobayashi, Katsuhiro Tsutsumi, Hirofumi Miyamoto
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Publication number: 20160280138Abstract: A ladder in a multi-step structure includes: first front and rear connecting members that are connected to a vehicle body and between a wheel and an end of the vehicle body and that are juxtaposed with a predetermined space; a first step board that is connected between respective lower ends of the first front and rear connecting members; second front and rear connecting members, respective upper ends of which are connected to both ends of the first step board; and a second step board that is connected between respective lower ends of the second front and rear connecting members. In the first front and rear connecting members, one near the wheel is fixed to the vehicle body and the other near the end of the vehicle body is connected in a pivotally movable manner to the vehicle body and is foldable.Type: ApplicationFiled: March 23, 2015Publication date: September 29, 2016Applicant: KOMATSU LTD.Inventors: Katsuhiro TSUTSUMI, Takehito TAKAHASHI
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Patent number: 9394817Abstract: In a working vehicle, an exhaust gas aftertreatment device is provided in an engine compartment that is adjacent to a cooling fan through which cooling air is supplied to a heat exchanger. The exhaust gas aftertreatment device includes a selective catalytic reduction device in which ammonia obtained from a urea aqueous solution is used as a reduction-causing agent. A urea aqueous solution pipe through which the urea aqueous solution is supplied is laid to the selective catalytic reduction device through the engine compartment. In the engine compartment, a pipeline-forming member having pipelines in which the urea aqueous solution pipe is installed. The cooling air sucked by a cooling fan flows into the pipelines.Type: GrantFiled: September 5, 2013Date of Patent: July 19, 2016Assignee: KOMATSU LTD.Inventors: Katsuhiro Tsutsumi, Hirofumi Miyamoto
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Patent number: 9388730Abstract: A ventilation structure of an engine compartment that houses an engine and is adjacent to a cooling fan that supplies cooling air to a heat exchanger in a form of a radiator is provided. A ventilation structure of the engine compartment includes: an exterior cover with which the engine and the cooling fan are covered; and a ventilation duct that includes an inner surface of the exterior cover, in which a first end of the ventilation duct is open in the engine compartment while a second end of the ventilation duct intercommunicates with a surrounding area of the cooling fan.Type: GrantFiled: September 5, 2013Date of Patent: July 12, 2016Assignee: KOMATSU LTD.Inventors: Katsuhiro Tsutsumi, Hirofumi Miyamoto
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Patent number: 9316136Abstract: Two sets of assemblies are arranged such that a diesel particulate filter device of an assembly as a first set, a selective catalytic reduction device of the assembly as the first set, a selective catalytic reduction device of an assembly as a second set, and a diesel particulate filter device of the assembly as the second set are located next to each other in this order. Respective first and second connection pipes are routed through a region directly underneath an arrangement region where the two selective catalytic reduction devices and the like are arranged, and connected to the respective diesel particulate filter devices. Thereby, an engine unit and a work vehicle which facilitate connection between an engine and an exhaust gas treatment structure and can reduce a load on the first and second connection pipes due to vibration can be achieved.Type: GrantFiled: May 14, 2013Date of Patent: April 19, 2016Assignee: KOMATSU LTD.Inventors: Tsuyoshi Kobayashi, Katsuhiro Tsutsumi, Hirofumi Miyamoto
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Patent number: 9279353Abstract: Two sets of assemblies are arranged such that a diesel particulate filter device of an assembly as a first set, a selective catalytic reduction device of the assembly as the first set, a selective catalytic reduction device of an assembly as a second set, and a diesel particulate filter device of the assembly as the second set are located next to each other in this order. Respective first and second connection pipes are routed through a region directly underneath an arrangement region where the two selective catalytic reduction devices and the like are arranged, and connected to the respective diesel particulate filter devices. Thereby, an engine unit and a work vehicle which facilitate connection between an engine and an exhaust gas treatment structure and can reduce a load on the first and second connection pipes due to vibration can be achieved.Type: GrantFiled: May 14, 2013Date of Patent: March 8, 2016Assignee: KOMATSU LTD.Inventors: Tsuyoshi Kobayashi, Katsuhiro Tsutsumi, Hirofumi Miyamoto
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Publication number: 20150369103Abstract: Two sets of assemblies are arranged such that a diesel particulate filter device of the assembly, a selective catalytic reduction device of the assembly, a selective catalytic reduction device of the assembly, and a diesel particulate filter device of the assembly are located next to each other in this order. Exhaust tubes are provided to extend upward from gas outlets of the selective catalytic reduction device of the assembly and the selective catalytic reduction device of the assembly. The two exhaust tubes are located on a virtual plane orthogonal to longitudinal directions of the selective catalytic reduction devices of the assemblies. Thereby, an air intake position for an engine can be easily set to a position from which exhaust gas from the engine is less likely to be taken in, in a configuration provided with two sets of assemblies.Type: ApplicationFiled: May 14, 2013Publication date: December 24, 2015Applicant: KOMATSU LTD.Inventors: Tsuyoshi KOBAYASHI, Katsuhiro TSUTSUMI, Hirofumi MIYAMOTO
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Publication number: 20150176451Abstract: In a working vehicle, an exhaust gas aftertreatment device is provided in an engine compartment that is adjacent to a cooling fan through which cooling air is supplied to a heat exchanger. The exhaust gas aftertreatment device includes a selective catalytic reduction device in which ammonia obtained from a urea aqueous solution is used as a reduction-causing agent. A urea aqueous solution pipe through which the urea aqueous solution is supplied is laid to the selective catalytic reduction device through the engine compartment. In the engine compartment, a pipeline-forming member having pipelines in which the urea aqueous solution pipe is installed. The cooling air sucked by a cooling fan flows into the pipelines.Type: ApplicationFiled: September 5, 2013Publication date: June 25, 2015Applicant: KOMATSU LTD.Inventors: Katsuhiro Tsutsumi, Hirofumi Miyamoto
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Publication number: 20150167523Abstract: An exhaust gas aftertreatment device provided to an upper portion of an engine includes a right and left pair of first and second aftertreatment units, into which exhaust gas from the engine dividedly flows, each including a first exhaust gas emission control system on an upstream side, a second exhaust gas emission control system on a downstream side and a communication pipe through which the first and second systems are in communication with each other, the first and second systems, while being arranged side by side in a right-and-left direction, being oriented so that a flow direction of the exhaust gas flowing therein is parallel with a front-and-rear direction. When the device is seen in the front-and-rear direction, an outer linear envelope tangent to the first system and the communication pipe of each of the units extends upward while tilting toward a right-and-left center of the engine.Type: ApplicationFiled: June 19, 2013Publication date: June 18, 2015Applicant: KOMATSU LTD.Inventors: Katsuhiro Tsutsumi, Hirofumi MIiyamoto
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Publication number: 20150068470Abstract: A ventilation structure of an engine compartment that houses an engine and is adjacent to a cooling fan that supplies cooling air to a heat exchanger in a form of a radiator is provided. A ventilation structure of the engine compartment includes: an exterior cover with which the engine and the cooling fan are covered; and a ventilation duct that includes an inner surface of the exterior cover, in which a first end of the ventilation duct is open in the engine compartment while a second end of the ventilation duct intercommunicates with a surrounding area of the cooling fan.Type: ApplicationFiled: September 5, 2013Publication date: March 12, 2015Applicant: KOMATSU LTD.Inventors: Katsuhiro Tsutsumi, Hirofumi Miyamoto