Patents by Inventor Fu-Rong Chang

Fu-Rong Chang 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).

  • Displacement measuring and remote control apparatus with a sheave and a flexible belt
    Patent number: 4969274
    Abstract: A displacement measuring and remote control apparatus includes a sheave having a helical groove therein, a flexible belt wound on the sheave along the helical groove and connected securely to a movable member, an azimuth identification device connected to the sheave for indicating the rotational angle of the sheave. The rotational angle of the sheave can be realized by the azimuth identification device so that it may be converted into the displacement of the movable member. The belt is continually tensed by a tensing device. The apparatus can be used in a hydraulic servo system for the purpose of remotely controlling the movement of a hydraulic driving unit and a driven body.
    Type: Grant
    Filed: October 11, 1988
    Date of Patent: November 13, 1990
    Inventor: Fu-Rong Chang