Patents by Inventor Masayuki Futamata

Masayuki Futamata 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).

  • Control circuit of actuator
    Patent number: 3996840
    Abstract: A control circuit for an actuator having an operation valve for selectively distributing hydraulic oil from a pump to plural actuators which has a plurality of conduits, a plurality of pilot-operated valves for controlling the flow direction of oil to the actuator side or the tank side, and a pilot spool valve, whereby the operating force of the operation valve can be greatly reduced in simple operation.
    Type: Grant
    Filed: July 23, 1974
    Date of Patent: December 14, 1976
    Assignee: Kabushiki Kaisha Komatsu Seisakusho
    Inventors: Masayuki Futamata, Hidenori Sato
  • Controlled output gear pump and motor
    Patent number: 3951575
    Abstract: A gear pump and motor having a plurality of pumps and motors, each of which have at least three gears interengaged with one another, seal members disposed adjacent to the gears, and control means for selectively controlling the movement of the seal members toward or away from the gears of the pump and motors so as to selectively actuate the pumps and motors so as to attain a desired output.
    Type: Grant
    Filed: July 10, 1973
    Date of Patent: April 20, 1976
    Assignee: Kabushiki Kaisha Komatsu Seisakusho
    Inventors: Mitsuteru Motomura, Masayuki Futamata, Yasuo Kitta