Patents by Inventor Naoki Sugano

Naoki Sugano 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).

  • Hydraulic motor control system
    Patent number: 5941155
    Abstract: A flow control valve is disposed in a bleed-off line which is for returning to a tank a portion of an oil flow advancing toward a hydraulic motor from a hydraulic pump. Upon operation of a control valve in an accelerating direction, the flow control valve is operated in a closing direction with a certain time lag, while upon operation of the control valve in a decelerating direction, the flow control valve is operated in an opening direction without a time lag. By so doing, an accelerating operation can be done smoothly while maintaining a required torque.
    Type: Grant
    Filed: November 17, 1997
    Date of Patent: August 24, 1999
    Assignee: Kabushiki Kaisha Kobe Seiko Sho
    Inventors: Seigo Arai, Susumu Ohmori, Naoki Sugano