Patents by Inventor Re-Fang Liang

Re-Fang Liang 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).

  • Method and device for controlling a wire cut electric discharging machine
    Patent number: 5393947
    Abstract: A device for controlling a wire cut electric discharging machine is provided with a testing circuit to detect the condition between the wire electrode and the workpiece before every discharge process so as to regulate the discharge energy according to one of the detected conditions: normal discharge, arc discharge, or short circuit. The device includes two switching transistors controlled by a control unit according to the comparison result between a reference voltage and the voltage measured between the wire electrode and the workpiece being processed.
    Type: Grant
    Filed: November 26, 1993
    Date of Patent: February 28, 1995
    Assignee: Industrial Technology Research Institute
    Inventors: Re-Fang Liang, Yu-Chin Wang, Hsin-Jung Chuang