Patents by Inventor Katsumi Makuta

Katsumi Makuta 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).

  • Publication number: 20100108431
    Abstract: A steering system that with a directional control valve 200 switchingly operating based on a pilot flow rate supplied from a steering motor unit 300 when a steering handle 330 is manipulated, that steers a vehicle 100 according to manipulation of the steering handle 330 by controlling a supply of pressure oil to cylinder actuators C1 and C2 through the directional control valve 200, includes an electromagnetic valve unit 600a, 600b that supplies a correction pilot pressure to the directional control valve 200 so as to correct a pilot pressure generated by the pilot flow rate from the steering motor unit 300 when a command signal is given.
    Type: Application
    Filed: April 9, 2008
    Publication date: May 6, 2010
    Applicant: KOMATSU LTD
    Inventors: Katsumi Makuta, Nobuhisa Honda, Keisuke Taka