Patents by Inventor Yuji Etsusaki

Yuji Etsusaki 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).

  • Automatic control system for maintaining blade in predetermined relationship to laser beam
    Patent number: 4273196
    Abstract: A beam receiver secured to an upper portion of a blade of an earth working equipment can rotate in a horizontal plane and move in a vertical direction and, accordingly, can catch a laser beam from a beam projector regardless of a direction of the equipment. When the beam has been deviated out of the beam receiver, the direction of the deviation is detected so that the beam can be received by the beam receiver again. The height of the beam receiver relative to the blade can be adjusted and the level of the blade can thereby be controlled very accurately.
    Type: Grant
    Filed: May 11, 1979
    Date of Patent: June 16, 1981
    Assignee: Kabushiki Kaisha Komatsu Seisakusho
    Inventors: Yuji Etsusaki, Shunichi Hayakawa