Patents by Inventor Yong-Dar Chen

Yong-Dar Chen 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).

  • Device and method of measuring the draw-in force for stationary and rotating spindle
    Patent number: 5741981
    Abstract: A measuring apparatus for measuring the draw-in force of a spindle of a machine tool includes a measuring mechanism and a displacement sensor for measuring displacement in a non-contact manner, without contacting the spindle. The draw-in force is converted into a displacement value. The apparatus may be used to measure the draw-in force of a rotating or a stationary spindle.
    Type: Grant
    Filed: November 22, 1996
    Date of Patent: April 21, 1998
    Assignee: Industrial Technology Research Institute
    Inventors: Cheng-Chang Ling, Yong-Dar Chen, Wen-Hsin Hsieh, Chun-Hung Huang