Patents by Inventor Yuusuke KAJITA

Yuusuke KAJITA 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).

  • Work machine, power unit, and diesel engine of work machine
    Patent number: 10302028
    Abstract: Provided are a work machine, a power unit, and a diesel engine of a work machine that make it possible to reduce emitted noxious substances to levels below reference values stipulated by exhaust gas regulations in advanced countries and regions while also omitting or simplifying a post-treatment device. A hydraulic pump is driven by a diesel engine that limits maximum output torque in a low revolution speed region lower than a high revolution speed region including a rated revolution speed in such a manner that the maximum output torque has a characteristic of intermediate torque lower than torque of a maximum output horsepower point at the rated revolution speed, and a hydraulic actuator is driven by hydraulic fluid delivered from the hydraulic pump.
    Type: Grant
    Filed: February 10, 2015
    Date of Patent: May 28, 2019
    Assignees: Hitachi Construction Machinery Co., Ltd., Kabushiki Kaisha Toyota Jidoshokki
    Inventors: Manabu Edamura, Yuusuke Kajita, Masatoshi Hoshino, Kouji Ishikawa, Kentarou Itoga, Naoki Ishikawa, Tsutomu Umehara
  • Work Machine, Power Unit, and Diesel Engine of Work Machine
    Publication number: 20170350327
    Abstract: Provided are a work machine, a power unit, and a diesel engine of a work machine that make it possible to reduce emitted noxious substances to levels below reference values stipulated by exhaust gas regulations in advanced countries and regions while also omitting or simplifying a post-treatment device. A hydraulic pump is driven by a diesel engine that limits maximum output torque in a low revolution speed region lower than a high revolution speed region including a rated revolution speed in such a manner that the maximum output torque has a characteristic of intermediate torque lower than torque of a maximum output horsepower point at the rated revolution speed, and a hydraulic actuator is driven by hydraulic fluid delivered from the hydraulic pump.
    Type: Application
    Filed: February 10, 2015
    Publication date: December 7, 2017
    Inventors: Manabu EDAMURA, Yuusuke KAJITA, Masatoshi HOSHINO, Kouji ISHIKAWA, Kentarou ITOGA, Naoki ISHIKAWA, Tsutomu UMEHARA