Patents by Inventor Daiki TAMBA

Daiki TAMBA 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: 12031289
    Abstract: A working machine includes a machine body, an engine on the machine body, a motor/generator to perform an assisting action in which the motor/generator functions as a motor to assist the engine in driving and an electricity generating action in which the motor/generator functions as a generator to generate electricity using power from the engine, a working device to function using power from the engine and the motor/generator, a work operation actuator for operation of the working device, an action controller to cause the assisting action to be performed when a rotation speed of the engine is equal to or less than a first rotation speed and cause the electricity generating action to be performed when the rotation speed of the engine is equal to or greater than a second rotation speed greater than the first rotation speed, and a speed controller to change the first rotation speed or the second rotation speed according to an operation amount of the work operation actuator.
    Type: Grant
    Filed: December 7, 2021
    Date of Patent: July 9, 2024
    Assignee: KUBOTA CORPORATION
    Inventors: Daiki Tamba, Yukifumi Yamanaka
  • Publication number: 20240223116
    Abstract: An electric working machine includes battery packs, an actuated device to be actuated by electricity supplied from the battery packs, and a controller to control discharging of the battery packs based on remaining charge levels of the battery packs. The controller is configured/programmed to select one of the battery packs as a discharging battery pack, and perform a limiting process to limit electricity supplied from the discharging battery pack to the actuated device when the remaining charge level of the discharging battery pack is less than a limit threshold, and cause the limit threshold and/or content of the limiting process to differ between when one or more of the battery packs that are other than the discharging battery pack have a remaining charge level of a second threshold or more and when any of such battery packs do not have a remaining charge level of the second threshold or more.
    Type: Application
    Filed: December 6, 2023
    Publication date: July 4, 2024
    Applicant: KUBOTA CORPORATION
    Inventors: Daiki TAMBA, Shinichi KAWABATA
  • Patent number: 11993911
    Abstract: A working machine includes a machine body, an engine on the machine body, a motor/generator to perform an assisting action in which the motor/generator functions as a motor to assist the engine in driving and an electricity generating action in which the motor/generator functions as a generator to generate electricity using power from the engine, a battery to store electricity generated by the motor/generator, an operation actuator to perform an operation of the machine body, a starting action determiner to determine, upon operation of the operation actuator, whether the operation corresponds to a starting action for the machine body, a first setter to set, if the starting action determiner determines that the operation of the operation actuator corresponds to the starting action, a torque of the motor/generator for the assisting action or the electricity generating action to a first torque, and a second setter to set, if the starting action determiner determines that the operation of the operation actuator d
    Type: Grant
    Filed: December 6, 2021
    Date of Patent: May 28, 2024
    Assignee: KUBOTA CORPORATION
    Inventors: Daiki Tamba, Yukifumi Yamanaka
  • Publication number: 20230006283
    Abstract: A power supply includes a battery; an inverter that controls an output voltage of the battery; an air-cooler that cools the battery and the inverter with cooling air; and a case that houses the battery, the inverter, and the air-cooler.
    Type: Application
    Filed: June 7, 2022
    Publication date: January 5, 2023
    Applicant: KUBOTA CORPORATION
    Inventors: Kazuto OKAZAKI, Daiki TAMBA
  • Publication number: 20220090345
    Abstract: A working machine includes a machine body, an engine on the machine body, a motor/generator to perform an assisting action in which the motor/generator functions as a motor to assist the engine in driving and an electricity generating action in which the motor/generator functions as a generator to generate electricity using power from the engine, a working device to function using power from the engine and the motor/generator, a work operation actuator for operation of the working device, an action controller to cause the assisting action to be performed when a rotation speed of the engine is equal to or less than a first rotation speed and cause the electricity generating action to be performed when the rotation speed of the engine is equal to or greater than a second rotation speed greater than the first rotation speed, and a speed controller to change the first rotation speed or the second rotation speed according to an operation amount of the work operation actuator.
    Type: Application
    Filed: December 7, 2021
    Publication date: March 24, 2022
    Inventors: Daiki TAMBA, Yukifumi YAMANAKA
  • Publication number: 20220090344
    Abstract: A working machine includes a machine body, an engine on the machine body, a motor/generator to perform an assisting action in which the motor/generator functions as a motor to assist the engine in driving and an electricity generating action in which the motor/generator functions as a generator to generate electricity using power from the engine, a battery to store electricity generated by the motor/generator, an operation actuator to perform an operation of the machine body, a starting action determiner to determine, upon operation of the operation actuator, whether the operation corresponds to a starting action for the machine body, a first setter to set, if the starting action determiner determines that the operation of the operation actuator corresponds to the starting action, a torque of the motor/generator for the assisting action or the electricity generating action to a first torque, and a second setter to set, if the starting action determiner determines that the operation of the operation actuator d
    Type: Application
    Filed: December 6, 2021
    Publication date: March 24, 2022
    Inventors: Daiki TAMBA, Yukifumi YAMANAKA
  • Publication number: 20210310214
    Abstract: The working machine includes a machine body, an engine provided on the machine body, a motor generator to be operated as a motor to assist driving of the engine in an assisting operation and to be operated as a generator by power of the engine to generate electricity in a generating operation, a battery to store the electricity generated by the motor generator, an acceleration sensor to measure acceleration of the machine body, and a controller to selectively set either one of the assisting operation and the generating operation based on the acceleration of the machine body measured by the acceleration sensor.
    Type: Application
    Filed: June 15, 2021
    Publication date: October 7, 2021
    Applicant: KUBOTA CORPORATION
    Inventors: Daiki TAMBA, Yukifumi YAMANAKA, Yuki SHIMOIKE