Patents by Inventor Yoshiaki Kurokawa

Yoshiaki Kurokawa 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: 12109878
    Abstract: A tractor comprising a traveling body having an engine; front wheels and rear wheels that support the traveling body; front fenders that cover the front wheels; steps for getting on and off an operation unit on the traveling body; a fuel tanks for supplying fuel to the engine; a post-processing device configured to purify exhaust gas of the engine; and a reducing agent tank that stores a reducing agent to be supplied to the post-processing device, wherein the reducing agent tank is accommodated in a tank recess of the fuel tank, wherein at least a portion of the reducing agent tank and the fuel tank are placed between the front fender and the steps, and wherein the fuel tank extends rearward from between the front fender and the step through the inward of the reducing agent tank in in the width direction of the machine body.
    Type: Grant
    Filed: November 10, 2023
    Date of Patent: October 8, 2024
    Assignee: YANMAR POWER TECHNOLOGY CO., LTD.
    Inventor: Yoshiaki Kurokawa
  • Publication number: 20240075809
    Abstract: A tractor comprising a traveling body having an engine; front wheels and rear wheels that support the traveling body; front fenders that cover the front wheels; steps for getting on and off an operation unit on the traveling body; a fuel tanks for supplying fuel to the engine; a post-processing device configured to purify exhaust gas of the engine; and a reducing agent tank that stores a reducing agent to be supplied to the post-processing device, wherein the reducing agent tank is accommodated in a tank recess of the fuel tank, wherein at least a portion of the reducing agent tank and the fuel tank are placed between the front fender and the steps, and wherein the fuel tank extends rearward from between the front fender and the step through the inward of the reducing agent tank in in the width direction of the machine body
    Type: Application
    Filed: November 10, 2023
    Publication date: March 7, 2024
    Inventor: Yoshiaki KUROKAWA
  • Publication number: 20230219630
    Abstract: A hood of a tractor including a front grill, a light unit, and an upper cover is provided with a center pillar. The front grill is attached to the center pillar, the light unit is attached to the front grill, and the upper cover is supported by the center pillar. The hood is further provided with a side frame and a lower cover, where the side frame is attached to the center pillar, and the lower cover is attached to at least the upper cover and the side frame.
    Type: Application
    Filed: March 22, 2023
    Publication date: July 13, 2023
    Inventor: Yoshiaki KUROKAWA
  • Patent number: 11634183
    Abstract: A hood of a tractor including a front grill, a light unit, and an upper cover is provided with a center pillar. The front grill is attached to the center pillar, the light unit is attached to the front grill, and the upper cover is supported by the center pillar. The hood is further provided with a side frame and a lower cover, where the side frame is attached to the center pillar, and the lower cover is attached to at least the upper cover and the side frame.
    Type: Grant
    Filed: June 3, 2020
    Date of Patent: April 25, 2023
    Assignee: YANMAR POWER TECHNOLOGY CO., LTD.
    Inventor: Yoshiaki Kurokawa
  • Publication number: 20230038898
    Abstract: A tractor including: a traveling body having an engine; a post-processing device configured to purify exhaust gas of the engine; and a reductant tank configured to store a reductant to be supplied to the post-processing device. A pair of left and right fuel tanks are arranged respectively on left and right sides of a longitudinally midway portion of the traveling body. A tank-accommodation recess for accommodating a reductant tank is formed at a lower-front portion of one of the left and right fuel tanks. While the reductant tank is accommodated in the tank-accommodation recess, an upper front portion of the fuel tank and the reductant tank are aligned up and down.
    Type: Application
    Filed: October 20, 2022
    Publication date: February 9, 2023
    Inventor: Yoshiaki KUROKAWA
  • Patent number: 11505060
    Abstract: A tractor including: a traveling body having an engine; a post-processing device configured to purify exhaust gas of the engine; and a reductant tank configured to store a reductant to be supplied to the post-processing device. A pair of left and right fuel tanks are arranged respectively on left and right sides of a longitudinally midway portion of the traveling body. A tank-accommodation recess for accommodating a reductant tank is formed at a lower-front portion of one of the left and right fuel tanks. While the reductant tank is accommodated in the tank-accommodation recess, an upper front portion of the fuel tank and the reductant tank are aligned up and down.
    Type: Grant
    Filed: April 20, 2021
    Date of Patent: November 22, 2022
    Assignee: YANMAR POWER TECHNOLOGY CO., LTD.
    Inventor: Yoshiaki Kurokawa
  • Patent number: 11292335
    Abstract: The working vehicle includes an engine installed in a front portion of a traveling machine body, and a post-processing device configured to purify exhaust gas from the engine. The post-processing device is mounted on an upper side of the engine. The engine and the post-processing device are covered with a hood. A hood shield plate is disposed on a rear surface side of the hood and covers at least the post-processing device from a rear surface. A heat insulating layer is formed between an operating seat disposed on a rear side of the hood and the hood shield plate.
    Type: Grant
    Filed: January 15, 2020
    Date of Patent: April 5, 2022
    Assignee: YANMAR POWER TECHNOLOGY CO., LTD.
    Inventor: Yoshiaki Kurokawa
  • Patent number: 11155156
    Abstract: A working vehicle includes an engine mounted in a front portion of a travelling vehicle, and a post-processing device configured to purify exhaust gas from the engine. The engine and the post-processing device are covered with a hood. An upper surface side of the hood is inclined to extend diagonally upward from a front side to a rear side. The post-processing device is mounted on an upper side of the engine, and is positioned on a rear and inner side of the inclined upper surface side of the hood.
    Type: Grant
    Filed: January 17, 2020
    Date of Patent: October 26, 2021
    Assignee: YANMAR POWER TECHNOLOGY CO., LTD.
    Inventor: Yoshiaki Kurokawa
  • Publication number: 20210237561
    Abstract: A tractor including: a traveling body having an engine; a post-processing device configured to purify exhaust gas of the engine; and a reductant tank configured to store a reductant to be supplied to the post-processing device. A pair of left and right fuel tanks are arranged respectively on left and right sides of a longitudinally midway portion of the traveling body. A tank-accommodation recess for accommodating a reductant tank is formed at a lower-front portion of one of the left and right fuel tanks. While the reductant tank is accommodated in the tank-accommodation recess, an upper front portion of the fuel tank and the reductant tank are aligned up and down.
    Type: Application
    Filed: April 20, 2021
    Publication date: August 5, 2021
    Inventor: Yoshiaki KUROKAWA
  • Patent number: 11021056
    Abstract: A work vehicle including a floor, a forward pedal arm, a reverse pedal arm, a forward rotation shaft, and a reverse rotation shaft. The floor has a first insertion hole and a second insertion hole. The forward pedal arm is placed in the first insertion hole and provided with a forward pedal. The reverse pedal arm is placed in the second insertion hole and provided with a reverse pedal. The forward rotation shaft serves as a rotation shaft of the forward pedal arm, and is oriented so that an outer end thereof is directed toward the rear of a vehicle body of the work vehicle. The reverse rotation shaft serves as a rotation shaft of the reverse pedal arm, and is oriented so that an outer end thereof is directed toward the rear of the vehicle body.
    Type: Grant
    Filed: August 19, 2016
    Date of Patent: June 1, 2021
    Assignee: YANMAR POWER TECHNOLOGY CO., LTD.
    Inventors: Shuichi Mitani, Yoshiaki Kurokawa
  • Patent number: 11007869
    Abstract: A tractor including: a traveling body having an engine; a post-processing device configured to purify exhaust gas of the engine; and a reductant tank configured to store a reductant to be supplied to the post-processing device. A pair of left and right fuel tanks are arranged respectively on left and right sides of a longitudinally midway portion of the traveling body. A tank-accommodation recess for accommodating a reductant tank is formed at a lower-front portion of one of the left and right fuel tanks. While the reductant tank is accommodated in the tank-accommodation recess, an upper front portion of the fuel tank and the reductant tank are aligned up and down.
    Type: Grant
    Filed: February 21, 2018
    Date of Patent: May 18, 2021
    Assignee: YANMAR POWER TECHNOLOGY CO., LTD.
    Inventor: Yoshiaki Kurokawa
  • Publication number: 20200290684
    Abstract: A hood of a tractor including a front grill, a light unit, and an upper cover is provided with a center pillar. The front grill is attached to the center pillar, the light unit is attached to the front grill, and the upper cover is supported by the center pillar. The hood is further provided with a side frame and a lower cover, where the side frame is attached to the center pillar, and the lower cover is attached to at least the upper cover and the side frame.
    Type: Application
    Filed: June 3, 2020
    Publication date: September 17, 2020
    Inventor: Yoshiaki KUROKAWA
  • Patent number: 10689039
    Abstract: A hood of a tractor including a front grill, a light unit, and an upper cover is provided with a center pillar. The front grill is attached to the center pillar, the light unit is attached to the front grill, and the upper cover is supported by the center pillar. The hood is further provided with a side frame and a lower cover, where the side frame is attached to the center pillar, and the lower cover is attached to at least the upper cover and the side frame.
    Type: Grant
    Filed: June 22, 2015
    Date of Patent: June 23, 2020
    Assignee: YANMAR CO., LTD.
    Inventor: Yoshiaki Kurokawa
  • Publication number: 20200156463
    Abstract: The working vehicle includes an engine installed in a front portion of a traveling machine body, and a post-processing device configured to purify exhaust gas from the engine. The post-processing device is mounted on an upper side of the engine. The engine and the post-processing device are covered with a hood. A hood shield plate is disposed on a rear surface side of the hood and covers at least the post-processing device from a rear surface. A heat insulating layer is formed between an operating seat disposed on a rear side of the hood and the hood shield plate.
    Type: Application
    Filed: January 15, 2020
    Publication date: May 21, 2020
    Inventor: Yoshiaki KUROKAWA
  • Publication number: 20200148055
    Abstract: A working vehicle includes an engine mounted in a front portion of a travelling vehicle, and a post-processing device configured to purify exhaust gas from the engine. The engine and the post-processing device are covered with a hood. An upper surface side of the hood is inclined to extend diagonally upward from a front side to a rear side. The post-processing device is mounted on an upper side of the engine, and is positioned on a rear and inner side of the inclined upper surface side of the hood.
    Type: Application
    Filed: January 17, 2020
    Publication date: May 14, 2020
    Inventor: Yoshiaki KUROKAWA
  • Patent number: 10549626
    Abstract: A working vehicle includes an engine mounted in a front portion of a travelling vehicle, and a post-processing device configured to purify exhaust gas from the engine. The engine and the post-processing device are covered with a hood. An upper surface side of the hood is inclined to extend diagonally upward from a front side to a rear side. The post-processing device is mounted on an upper side of the engine, and is positioned on a rear and inner side of the inclined upper surface side of the hood.
    Type: Grant
    Filed: September 28, 2016
    Date of Patent: February 4, 2020
    Assignee: YANMAR CO., LTD.
    Inventor: Yoshiaki Kurokawa
  • Publication number: 20200031222
    Abstract: A tractor including: a traveling body having an engine; a post-processing device configured to purify exhaust gas of the engine; and a reductant tank configured to store a reductant to be supplied to the post-processing device. A pair of left and right fuel tanks are arranged respectively on left and right sides of a longitudinally midway portion of the traveling body. A tank-accommodation recess for accommodating a reductant tank is formed at a lower-front portion of one of the left and right fuel tanks. While the reductant tank is accommodated in the tank-accommodation recess, an upper front portion of the fuel tank and the reductant tank are aligned up and down.
    Type: Application
    Filed: February 21, 2018
    Publication date: January 30, 2020
    Applicant: Yanmar Co., Ltd.
    Inventor: Yoshiaki KUROKAWA
  • Patent number: 10543744
    Abstract: The working vehicle includes an engine installed in a front portion of a traveling machine body, and a post-processing device configured to purify exhaust gas from the engine. The post-processing device is mounted on an upper side of the engine. The engine and the post-processing device are covered with a hood. A hood shield plate is disposed on a rear surface side of the hood and covers at least the post-processing device from a rear surface. A heat insulating layer is formed between an operating seat disposed on a rear side of the hood and the hood shield plate.
    Type: Grant
    Filed: November 28, 2016
    Date of Patent: January 28, 2020
    Assignee: YANMAR CO., LTD.
    Inventor: Yoshiaki Kurokawa
  • Patent number: 10487711
    Abstract: A work vehicle includes an engine, a post-processing device, and a cooling fan. The engine is mounted on a front portion of a travelling machine body. The post-processing device purifies exhaust gas of the engine. The cooling fan water-cools the engine. The cooling fan is located in front of the engine. The cooling fan, the engine, and the post-processing device are covered with a hood. The hood includes a shield. The shield covers a lower section of the post-processing device and one side of the engine. The shield is a perforated plate including a plurality of holes.
    Type: Grant
    Filed: April 17, 2017
    Date of Patent: November 26, 2019
    Assignee: YANMAR CO., LTD.
    Inventors: Yoshiaki Kurokawa, Satoshi Hasegawa, Masahito Adachi
  • Patent number: 10377424
    Abstract: In a bonnet of a tractor having an upper cover and a pair of lower covers, the upper cover has a center line formed from a front end point up to a diagonally-rearward midpoint, and the upper cover is provided with two opening parts sandwiching the center line. In addition, the opening parts are disposed so that one side of each follows the center line.
    Type: Grant
    Filed: October 21, 2015
    Date of Patent: August 13, 2019
    Assignee: YANMAR CO., LTD.
    Inventor: Yoshiaki Kurokawa