Patents by Inventor Hiromu YUKAWA

Hiromu YUKAWA 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: 11136743
    Abstract: An electric construction machine that can travel from a work site to charging equipment and prevent the lowering of the work efficiency is provided. An electric hydraulic excavator includes a motor (28) that is driven by power of a battery device (19) and drives a hydraulic pump (29), a controller (37), and a display device (24). The controller (37) computes and stores the amount of consumed power of the motor (28) consumed during the period from the departure of the hydraulic excavator from the charging equipment to arrival at the work site, based on movement information of the hydraulic excavator acquired by a movement information acquiring device. The controller (37) subtracts the amount of consumed power from the amount of stored power of the battery device (19) to compute the amount of power consumable at the work site.
    Type: Grant
    Filed: September 28, 2018
    Date of Patent: October 5, 2021
    Assignee: Hitachi Construction Machinery Tierra Co., Ltd
    Inventors: Takuya Nomura, Masayuki Yunoue, Wataru Takagi, Hiromu Yukawa, Yuki Yamamoto
  • Publication number: 20210222399
    Abstract: An electric construction machine that can travel from a work site to charging equipment and prevent the lowering of the work efficiency is provided. An electric hydraulic excavator includes a motor (28) that is driven by power of a battery device (19) and drives a hydraulic pump (29), a controller (37), and a display device (24). The controller (37) computes and stores the amount of consumed power of the motor (28) consumed during the period from the departure of the hydraulic excavator from the charging equipment to arrival at the work site, based on movement information of the hydraulic excavator acquired by a movement information acquiring device. The controller (37) subtracts the amount of consumed power from the amount of stored power of the battery device (19) to compute the amount of power consumable at the work site.
    Type: Application
    Filed: September 28, 2018
    Publication date: July 22, 2021
    Inventors: Takuya NOMURA, Masayuki YUNOUE, Wataru TAKAGI, Hiromu YUKAWA, Yuki YAMAMOTO