Patents by Inventor Shigetoshi Shimoo

Shigetoshi Shimoo 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).

  • Drive for rotating structure
    Patent number: 8505290
    Abstract: A hydraulic excavator includes a rotation motor (31) for rotating an upper rotating structure. The rotation motor (31) includes an electric motor (32), a hydraulic motor (40), and a reduction gearbox (33). The hydraulic motor (40) includes a motor mechanism (50) and a clutch mechanism (70). The motor mechanism (50), which is a vane-type hydraulic motor, is engaged with/disengaged from a motor shaft (37) by the clutch mechanism (70). When rotation speed of the upper rotating structure is low, and a required value of output torque of the rotation motor (31) is high, an operation of driving the output shaft (35) by the hydraulic motor (40) is performed in the rotation motor (31).
    Type: Grant
    Filed: May 23, 2008
    Date of Patent: August 13, 2013
    Assignee: Daikin Industries, Ltd.
    Inventors: Toshiyuki Sakai, Shigetoshi Shimoo
  • DRIVE FOR ROTATING STRUCTURE
    Publication number: 20100162706
    Abstract: A hydraulic excavator includes a rotation motor (31) for rotating an upper rotating structure. The rotation motor (31) includes an electric motor (32), a hydraulic motor (40), and a reduction gearbox (33). The hydraulic motor (40) includes a motor mechanism (50) and a clutch mechanism (70). The motor mechanism (50), which is a vane-type hydraulic motor, is engaged with/disengaged from a motor shaft (37) by the clutch mechanism (70). When rotation speed of the upper rotating structure is low, and a required value of output torque of the rotation motor (31) is high, an operation of driving the output shaft (35) by the hydraulic motor (40) is performed in the rotation motor (31).
    Type: Application
    Filed: May 23, 2008
    Publication date: July 1, 2010
    Inventors: Toshiyuki Sakai, Shigetoshi Shimoo