Patents by Inventor Koiji Ishikawa

Koiji Ishikawa 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).

  • HYBRID CONSTRUCTION MACHINE
    Publication number: 20140199148
    Abstract: In hybrid construction machine employing a hydraulic motor and an electric motor for the driving of the swing structure, satisfactory operability of a combined operation of the swing structure and other actuators is secured irrespective of the operating status of the electric motor. A control device of the hybrid construction machine executes control selected from: hydraulic/electric complex swing control for driving the swing structure by total torque of the electric motor and the hydraulic motor when a swing operating lever device is operated; and hydraulic solo swing control for driving the swing structure by the torque of the hydraulic motor alone when the swing operating lever device is operated.
    Type: Application
    Filed: January 5, 2012
    Publication date: July 17, 2014
    Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Manabu Edamura, Takatoshi Ooki, Takako Satake, Koiji Ishikawa, Shinya Imura, Shinji Nishikawa