Patents by Inventor Tatsuya Nagatomi

Tatsuya Nagatomi 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).

  • Publication number: 20240123845
    Abstract: An electric work vehicle includes an on-board charger, a power reception connector enabling attachment and detachment of a charging cable that is to be connected to the on-board charger, and an energizing cable that connects the power reception connector and the on-board charger to each other. Charging ports that enable attachment and detachment of the power reception connector are provided in both a left side portion of a body and a right side portion of the body. The charging ports are provided at positions higher than upper ends of travel devices.
    Type: Application
    Filed: October 17, 2023
    Publication date: April 18, 2024
    Inventors: Tatsuya Nagatomi, Takafumi Komatsu
  • Patent number: 11926363
    Abstract: A work vehicle according to the present invention includes left and right axle cases of a rigid axle type, and left and right suspension mechanisms movable in the up-down direction relative to body frames and separately supporting the left and right axle cases, respectively. The work vehicle also includes (i) a first projection projecting downward from the left or right one of the body frames, (ii) a second projection projecting upward from that position on either the left and right axle cases or a frame body integrated with the axle cases which is opposite to the first projection in the left-right direction, and (iii) a lateral rod having a first end connected with the first projection and a second end connected with the second projection.
    Type: Grant
    Filed: June 17, 2022
    Date of Patent: March 12, 2024
    Assignee: Kubota Corporation
    Inventors: Masahiro Azuma, Tatsuya Nagatomi
  • Publication number: 20220339985
    Abstract: A work vehicle includes: a wheel support member configured to support a pair of left and right traveling wheels; a link mechanism configured to support the wheel support member such that the wheel support member can be raised and lowered, the link mechanism being provided spanning between a vehicle body and the wheel support member; a suspension mechanism configured to elastically support the wheel support member, the suspension mechanism being provided spanning between a suspension support portion, which is formed on the vehicle body, and the wheel support member; and a lateral link configured to restrict leftward and rightward movement of the wheel support member, the lateral link being joined to a vehicle body-side support portion, which is formed on the vehicle body, and to a wheel-side support portion, which is formed on the wheel support member, wherein the link mechanism has: an upper link with an front end portion supported so as to be able to pivot up and down around an upper pivot axis by a link sup
    Type: Application
    Filed: July 11, 2022
    Publication date: October 27, 2022
    Inventors: Masahiro Azuma, Tatsuya Nagatomi, Kenta Moribe, Tomonori Kaneko
  • Patent number: 11479071
    Abstract: A work vehicle includes: a wheel support member configured to support a pair of left and right traveling wheels; a link mechanism configured to support the wheel support member such that the wheel support member can be raised and lowered, the link mechanism being provided spanning between a vehicle body and the wheel support member; a suspension mechanism configured to elastically support the wheel support member, the suspension mechanism being provided spanning between a suspension support portion, which is formed on the vehicle body, and the wheel support member; and a lateral link configured to restrict leftward and rightward movement of the wheel support member, the lateral link being joined to a vehicle body-side support portion, which is formed on the vehicle body, and to a wheel-side support portion, which is formed on the wheel support member, wherein the link mechanism has: an upper link with an front end portion supported so as to be able to pivot up and down around an upper pivot axis by a link sup
    Type: Grant
    Filed: December 10, 2019
    Date of Patent: October 25, 2022
    Assignee: Kubota Corporation
    Inventors: Masahiro Azuma, Tatsuya Nagatomi, Kenta Moribe, Tomonori Kaneko
  • Publication number: 20220315109
    Abstract: A work vehicle according to the present invention includes left and right axle cases of a rigid axle type, and left and right suspension mechanisms movable in the up-down direction relative to body frames and separately supporting the left and right axle cases, respectively. The work vehicle also includes (i) a first projection projecting downward from the left or right one of the body frames, (ii) a second projection projecting upward from that position on either the left and right axle cases or a frame body integrated with the axle cases which is opposite to the first projection in the left-right direction, and (iii) a lateral rod having a first end connected with the first projection and a second end connected with the second projection.
    Type: Application
    Filed: June 17, 2022
    Publication date: October 6, 2022
    Inventors: Masahiro Azuma, Tatsuya Nagatomi
  • Patent number: 11390325
    Abstract: A work vehicle according to the present invention includes left and right axle cases of a rigid axle type, and left and right suspension mechanisms movable in the up-down direction relative to body frames and separately supporting the left and right axle cases, respectively. The work vehicle also includes (i) a first projection projecting downward from the left or right one of the body frames, (ii) a second projection projecting upward from that position on either the left and right axle cases or a frame body integrated with the axle cases which is opposite to the first projection in the left-right direction, and (iii) a lateral rod having a first end connected with the first projection and a second end connected with the second projection.
    Type: Grant
    Filed: May 26, 2020
    Date of Patent: July 19, 2022
    Assignee: Kubota Corporation
    Inventors: Masahiro Azuma, Tatsuya Nagatomi
  • Patent number: 11254201
    Abstract: A work vehicle of the invention includes: a pair of right and left front wheels disposed in a front part of the vehicle body; a pair of right and left rear wheels disposed in a rear part of the vehicle body; a side wall disposed at an outer end part of one side in a right-left direction of the vehicle body; and a radiator disposed between the front wheels and the rear wheels in a side view and on an inner side relative to the side wall in a plane view, wherein the radiator is disposed with an air-suction surface thereof facing toward the side wall to form an air-suction opening in a bottom part of a space between the air-suction surface and an inner surface of the side wall, and wherein a dust-proof body protruding downward to a lower level than a level of a lower end of the vehicle body is disposed on at least one of: a front side of the air-suction opening and a rear side of the front wheels; and a rear side of the air-suction opening and a front side of the rear wheels.
    Type: Grant
    Filed: June 9, 2020
    Date of Patent: February 22, 2022
    Assignee: Kubota Corporation
    Inventor: Tatsuya Nagatomi
  • Patent number: 11230184
    Abstract: In a work vehicle including a pair of left and right link mechanisms disposed between a vehicle body and a wheel support member and configured to support the wheel support member to the vehicle body to be vertically pivotable, a suspension mechanism disposed between the vehicle body and the wheel support member and configured to elastically support the wheel support member, and an engine disposed between the pair of left and right link mechanisms, each one of the pair of left and right link mechanisms including an upper link provided between a link support portion formed in the vehicle body and the wheel support member and a lower link provided between the link support portion and the wheel support member, there are provided a radiator disposed on lateral outer side of the vehicle body relative to the link mechanisms, a cooling water circulation hose connected to the engine and the radiator and configured to circulate engine cooling water between the engine and the radiator.
    Type: Grant
    Filed: December 10, 2019
    Date of Patent: January 25, 2022
    Assignee: Kubota Corporation
    Inventors: Tatsuya Nagatomi, Shinya Izumi
  • Publication number: 20210094408
    Abstract: A work vehicle of the invention includes: a pair of right and left front wheels disposed in a front part of the vehicle body; a pair of right and left rear wheels disposed in a rear part of the vehicle body; a side wall disposed at an outer end part of one side in a right-left direction of the vehicle body; and a radiator disposed between the front wheels and the rear wheels in a side view and on an inner side relative to the side wall in a plane view, wherein the radiator is disposed with an air-suction surface thereof facing toward the side wall to form an air-suction opening in a bottom part of a space between the air-suction surface and an inner surface of the side wall, and wherein a dust-proof body protruding downward to a lower level than a level of a lower end of the vehicle body is disposed on at least one of: a front side of the air-suction opening and a rear side of the front wheels; and a rear side of the air-suction opening and a front side of the rear wheels.
    Type: Application
    Filed: June 9, 2020
    Publication date: April 1, 2021
    Inventor: Tatsuya Nagatomi
  • Publication number: 20210086834
    Abstract: A work vehicle according to the present invention includes left and right axle cases of a rigid axle type, and left and right suspension mechanisms movable in the up-down direction relative to body frames and separately supporting the left and right axle cases, respectively. The work vehicle also includes (i) a first projection projecting downward from the left or right one of the body frames, (ii) a second projection projecting upward from that position on either the left and right axle cases or a frame body integrated with the axle cases which is opposite to the first projection in the left-right direction, and (iii) a lateral rod having a first end connected with the first projection and a second end connected with the second projection.
    Type: Application
    Filed: May 26, 2020
    Publication date: March 25, 2021
    Inventors: Masahiro Azuma, Tatsuya Nagatomi
  • Publication number: 20200298695
    Abstract: In a work vehicle including a pair of left and right link mechanisms disposed between a vehicle body and a wheel support member and configured to support the wheel support member to the vehicle body to be vertically pivotable, a suspension mechanism disposed between the vehicle body and the wheel support member and configured to elastically support the wheel support member, and an engine disposed between the pair of left and right link mechanisms, each one of the pair of left and right link mechanisms including an upper link provided between a link support portion formed in the vehicle body and the wheel support member and a lower link provided between the link support portion and the wheel support member, there are provided a radiator disposed on lateral outer side of the vehicle body relative to the link mechanisms, a cooling water circulation hose connected to the engine and the radiator and configured to circulate engine cooling water between the engine and the radiator.
    Type: Application
    Filed: December 10, 2019
    Publication date: September 24, 2020
    Inventors: Tatsuya Nagatomi, Shinya Izumi
  • Publication number: 20200276872
    Abstract: A work vehicle includes: a wheel support member configured to support a pair of left and right traveling wheels; a link mechanism configured to support the wheel support member such that the wheel support member can be raised and lowered, the link mechanism being provided spanning between a vehicle body and the wheel support member; a suspension mechanism configured to elastically support the wheel support member, the suspension mechanism being provided spanning between a suspension support portion, which is formed on the vehicle body, and the wheel support member; and a lateral link configured to restrict leftward and rightward movement of the wheel support member, the lateral link being joined to a vehicle body-side support portion, which is formed on the vehicle body, and to a wheel-side support portion, which is formed on the wheel support member, wherein the link mechanism has: an upper link with an front end portion supported so as to be able to pivot up and down around an upper pivot axis by a link sup
    Type: Application
    Filed: December 10, 2019
    Publication date: September 3, 2020
    Inventors: Masahiro Azuma, Tatsuya Nagatomi, Kenta Moribe, Tomonori Kaneko
  • Patent number: 10486552
    Abstract: A work vehicle provided with a boarding section and an engine is disclosed. The boarding section is provided with a seat that allows an occupant to be seated thereon. The engine is located below the seat. A separator is provided to separate a foot space for an occupant and the engine from each other. The foot space is formed forward of the engine. The separator is provided with a radiator part formed therein. The radiator part is configured to radiate heat.
    Type: Grant
    Filed: January 15, 2018
    Date of Patent: November 26, 2019
    Assignee: Kubota Corporation
    Inventors: Katsuhiro Wakabayashi, Kodai Tateishi, Yoshimi Hirooka, Kohta Nakao, Tatsuya Nagatomi
  • Publication number: 20180134179
    Abstract: A work vehicle provided with a boarding section and an engine is disclosed. The boarding section is provided with a seat that allows an occupant to be seated thereon. The engine is located below the seat. A separator is provided to separate a foot space for an occupant and the engine from each other. The foot space is formed forward of the engine. The separator is provided with a radiator part formed therein. The radiator part is configured to radiate heat.
    Type: Application
    Filed: January 15, 2018
    Publication date: May 17, 2018
    Inventors: Katsuhiro Wakabayashi, Kodai Tateishi, Yoshimi Hirooka, Kohta Nakao, Tatsuya Nagatomi
  • Patent number: 9902292
    Abstract: A work vehicle provided with a boarding section and an engine is disclosed. The boarding section is provided with a seat that allows an occupant to be seated thereon. The engine is located below the seat. A separator is provided to separate a foot space for an occupant and the engine from each other. The foot space is formed forward of the engine. The separator is provided with a radiator part formed therein. The radiator part is configured to radiate heat.
    Type: Grant
    Filed: May 26, 2016
    Date of Patent: February 27, 2018
    Assignee: Kubota Corporation
    Inventors: Katsuhiro Wakabayashi, Kodai Tateishi, Yoshimi Hirooka, Kohta Nakao, Tatsuya Nagatomi
  • Publication number: 20170036717
    Abstract: A work vehicle provided with a boarding section and an engine is disclosed. The boarding section is provided with a seat that allows an occupant to be seated thereon. The engine is located below the seat. A separator is provided to separate a foot space for an occupant and the engine from each other. The foot space is formed forward of the engine. The separator is provided with a radiator part formed therein. The radiator part is configured to radiate heat.
    Type: Application
    Filed: May 26, 2016
    Publication date: February 9, 2017
    Inventors: Katsuhiro Wakabayashi, Kodai Tateishi, Yoshimi Hirooka, Kohta Nakao, Tatsuya Nagatomi