Patents by Inventor Tadashi Iga

Tadashi Iga 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).

  • Extension jib for a boom
    Patent number: 4828124
    Abstract: A retractable extension jib for a telescopic boom has frame body rotatably mounted on an end of the boom so as to be rotated about a rotary axis, a horizontal shaft provided at a lower portion of the frame body and rotatably connecting a base portion of the extension jib. A pair of oil hydraulic cylinders are provided between a base portion of the extension jib and an upper portion of the frame body so as to rotate the jib about the horizontal shaft. The hydraulic cylinders are so arranged as to rotate the extension jib from a retracted position to a lower position where a longitudinal axis of the jib is substantially parallel with the rotary axis.
    Type: Grant
    Filed: October 5, 1988
    Date of Patent: May 9, 1989
    Assignee: Tadano Ltd.
    Inventor: Tadashi Iga