Patents by Inventor Rongqiang Yao

Rongqiang Yao 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).

  • High sensitivity leakage current detection interrupter
    Patent number: 8705216
    Abstract: A high sensitivity leakage current detection interrupter (LCDI) includes a shielded wire, a current leakage detection unit, and a tripping mechanism. A live core and a neutral core of the shielded wire are respectively wrapped in two conductive shell wires. The current leakage detection unit includes a pair of rectifying diodes reversely connected in series between a live line and a neutral line of a power supply, a voltage dropping resistor, thyristors, and resistor-capacitor (RC) voltage dropping filter circuits. The tripping mechanism includes control units with on/off respectively controlled by the thyristors. When either of the thyristors is turned on, the corresponding control unit is turned on, and the tripping mechanism is actuated to switch off the power supply.
    Type: Grant
    Filed: September 27, 2011
    Date of Patent: April 22, 2014
    Inventors: Fang Yu, Yong Dai, Rongqiang Yao
  • HIGH SENSITIVITY LEAKAGE CURRENT DETECTION INTERRUPTER
    Publication number: 20120075756
    Abstract: A high sensitivity leakage current detection interrupter (LCDI) includes a shielded wire, a current leakage detection unit, and a tripping mechanism. A live core and a neutral core of the shielded wire are respectively wrapped in two conductive shell wires. The current leakage detection unit includes a pair of rectifying diodes reversely connected in series between a live line and a neutral line of a power supply, a voltage dropping resistor, thyristors, and resistor-capacitor (RC) voltage dropping filter circuits. The tripping mechanism includes control units with on/off respectively controlled by the thyristors. When either of the thyristors is turned on, the corresponding control unit is turned on, and the tripping mechanism is actuated to switch off the power supply.
    Type: Application
    Filed: September 27, 2011
    Publication date: March 29, 2012
    Applicant: GENERAL PROTECHT GROUP, INC.
    Inventors: Fang Yu, Yong Dai, Rongqiang Yao