Patents by Inventor Shingo Yuguchi

Shingo Yuguchi 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 system of hydraulic lift device for battery operated industrial trucks
    Patent number: 7770696
    Abstract: An energy recovering system of a hydraulic lift device for 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, and energy recovering efficiency is increased. A hydraulic motor (6) is disposed in a fluid path for recovering pressurized working fluid from a lift cylinder (1) via a control valve (10) to a working fluid reservoir tank (8) so that the hydraulic motor (6) is driven by the pressurized working fluid returning from the lift cylinder (1). The hydraulic motor (6) is connected to an electric motor (4) for driving a hydraulic pump (3), which supplies pressurized fluid to the lift cylinder (1), by means of a one-way clutch (7) which performs torque transmission only from the hydraulic motor (6) to the electric motor (4).
    Type: Grant
    Filed: February 15, 2006
    Date of Patent: August 10, 2010
    Assignees: Mitsubishi Heavy Industries, Ltd., Nippon Yusoki Co., Ltd.
    Inventors: Kensuke Futahashi, Hiroshi Satou, Masataka Kawaguchi, Fujio Eguchi, Toshiyuki Honda, Keizo Ogino, Shingo Yuguchi, Kazuhito Kawashima, Michio Akao
  • Energy recovering method and system in hydraulic lift device of battery operated industrial trucks
    Patent number: 7770697
    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: Grant
    Filed: February 13, 2006
    Date of Patent: August 10, 2010
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Kensuke Futahashi, Hiroshi Satou, Masataka Kawaguchi, Tomohiro Akaki, Fujio Eguchi, Keizo Ogino, Shingo Yuguchi, Kazuhito Kawashima, Michio Akao
  • 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
  • Energy Recovering System of Hydraulic Lift Device for Battery Operated Industrial Trucks
    Publication number: 20070278048
    Abstract: An energy recovering system of a hydraulic lift device for 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, and energy recovering efficiency is increased. A hydraulic motor (6) is disposed in a fluid path for recovering pressurized working fluid from a lift cylinder (1) via a control valve (10) to a working fluid reservoir tank (8) so that the hydraulic motor (6) is driven by the pressurized working fluid returning from the lift cylinder (1). The hydraulic motor (6) is connected to an electric motor (4) for driving a hydraulic pump (3), which supplies pressurized fluid to the lift cylinder (1), by means of a one-way clutch (7) which performs torque transmission only from the hydraulic motor (6) to the electric motor (4).
    Type: Application
    Filed: February 15, 2006
    Publication date: December 6, 2007
    Applicants: Mitsubishi Heavy Industries, Ltd., NIPPON YUSOKI CO., LTD.
    Inventors: Kensuke Futahashi, Hiroshi Satou, Masataka Kawaguchi, Fujio Eguchi, Toshiyuki Honda, Keizo Ogino, Shingo Yuguchi, Kazuhito Kawashima, Michiro Akao