Patents by Inventor Masamitsu Shibayama

Masamitsu Shibayama 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).

  • System for controlling a power shovel
    Patent number: 4059196
    Abstract: A system for controlling a power shovel for use in civil engineering works is described. The control system comprises a manual control lever consisting of a control boom, a control arm and a control bucket which are miniature of a boom, an arm and a bucket of the power shovel, and a control circuit. The control circuit includes means for detecting the displacement of the elements of the control lever, means for detecting the displacement of the elements of the power shovel, means for comparing the displacement of the control lever with one of the power shovel. The differential signal from the circuit is applied to servo-mechanisms for following up the power shovel in accordance with the movement of the control lever. The power shovel can be controlled equally with the manual control lever.
    Type: Grant
    Filed: March 12, 1976
    Date of Patent: November 22, 1977
    Assignee: Hokushin Electric Works, Ltd.
    Inventors: Hisanori Uchino, Masamichi Takada, Takahiro Shimizu, Masamitsu Shibayama, Fumiya Furuno