Patents by Inventor Toshiro Nozawa

Toshiro Nozawa 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).

  • Hydraulic steering system for articulated vehicle
    Patent number: 5269389
    Abstract: A fully hydraulic steering system for a vehicle having a front frame and a rear frame coupled to each other by an articulating pin, the steering system coupling a steering unit operated by a wheel to steering cylinders, for turning the vehicle body. The steering system comprises: a sensor to detect a turning angle of the steering wheel; a sensor to detect an articulating angle of the vehicle body; a controller to compare outputs from these two sensors to drive a wheel position correcting solenoid valve according to the difference between the outputs; a pilot-type diverting valve to allow wheel position correcting oil to branch from a switch pump circuit to the wheel position correcting solenoid valve; and a safety valve to close a drain port of the pilot type diverting valve only when the driver performs steering with the wheel so that the pilot-type diverting valve feeds correcting oil to the wheel position correcting solenoid valve.
    Type: Grant
    Filed: January 10, 1992
    Date of Patent: December 14, 1993
    Assignees: Kabushiki Kaisha Komatsu Seisakusho, Komatsu Mec Kabushiki Kaisha
    Inventors: Yasumasa Tomiyoshi, Toshiro Nozawa
  • Steering wheel position compensator of fully hydraulic steering system
    Patent number: 5267628
    Abstract: A steering wheel position compensator of a fully hydraulic steering device for working vehicle, etc.
    Type: Grant
    Filed: October 17, 1991
    Date of Patent: December 7, 1993
    Assignees: Kabushiki Kaisha Komatsu Seisakusho, Komatsu Mec Kabushiki Kaisha
    Inventors: Yasumasa Tomiyoshi, Toshiro Nozawa