Patents by Inventor Chol Min Pak

Chol Min Pak 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 of extinguishing an electric arc in a low or high voltage switchgear by pulse discharge
    Patent number: 9105428
    Abstract: The present invention relates to a method of extinguishing an electric arc, which occurs in low or high voltage switchgears, by pulse discharge. The electric arc is cut like a “fuse” by connecting a condenser (201) to both ends of the electric arc at the moment when it occurs and discharging the condenser (201) through the electric arc. The condenser is charged using a resistor (202) and a diode (203), and its discharge is adjusted by some auxiliary contacts.
    Type: Grant
    Filed: December 9, 2010
    Date of Patent: August 11, 2015
    Inventors: Chol Min Pak, Sang Hwan Kwon