Patents by Inventor Yoshitsugu Shigehisa

Yoshitsugu Shigehisa 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).

  • Counterweight for construction vehicle
    Patent number: 6481748
    Abstract: An object is to provide an arrangement which enables the worker to easily carry out checking and maintenance on a part such as an engine from outside in a natural pose without climbing on a counterweight. In a construction vehicle having a traveling vehicle body and a revolving superstructure with an implement, a counterweight installed in the rear of the revolving superstructure comprises a detachable, separable sub-counterweight which is located on the position corresponding to the position of a part requiring maintenance.
    Type: Grant
    Filed: June 28, 2000
    Date of Patent: November 19, 2002
    Assignee: Komatsu Ltd.
    Inventors: Kozo Okuda, Yoshitsugu Shigehisa