Patents by Inventor Kazushi Kawashima

Kazushi Kawashima 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).

  • Energy Recovering Method and System in Hydraulic Lift Device of Battery Operated Industrial Trucks
    Publication number: 20080128214
    Abstract: An energy recovering system in a hydraulic lift device of a battery operated industrial truck. With the system, working oil can be supplied to other hydraulic actuators while energy recovering operation is performed by the hydraulic lift device, occurrence of pressure pulsation in the working oil can be prevented, and energy recovering efficiency is increased. The hydraulic lift device comprises a lift cylinder (1) for lifting a fork F, an electric motor (4) rotated by power supply from a battery (5), a hydraulic pump (3) for supplying pressurized oil to the lift cylinder (1), a control valve (14) disposed in a pressurized oil supply path (23), and a controller (17).
    Type: Application
    Filed: February 13, 2006
    Publication date: June 5, 2008
    Applicants: Mitsubishi Heavy Industries, Ltd., Nippon YUSOKI CO., LTD.
    Inventors: Kensuke Tahashi, Hiroshi Satou, Masataka Kawaguchi, Tomohiro Akagi, Fujio Eguchi, Keizo Ogino, Shingo Yuguchi, Kazushi Kawashima, Michio Akao