Patents by Inventor Lianyun Wang

Lianyun Wang 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).

  • Intelligent life testing methods and apparatus for leakage current protection
    Patent number: 7268559
    Abstract: An apparatus for testing the life of a leakage current protection device having a leakage current detection circuit. In one embodiment, the apparatus a trip mechanism state generator, a fault alarm generator, a ground fault simulation unit. In operation, the ground fault simulation unit generates a simulated ground fault signal during every positive half-wave of an AC power, the simulated ground fault signal is detected by the leakage current detection circuit, the leakage current detection circuit responsively generates a signal to turn a switching device into its conductive state so as to allow a current to pass therethrough, the passed current is converted into a DC voltage in accordance with a trip mechanism state generated by the trip mechanism state generator, the fault alarm circuit receives and analyzes the DC voltage and indicates whether a fault exists in the leakage current protection device.
    Type: Grant
    Filed: October 26, 2006
    Date of Patent: September 11, 2007
    Assignee: General Protecht Group, Inc.
    Inventors: Wusheng Chen, Fu Wang, Lianyun Wang
  • INTELLIGENT LIFE TESTING METHODS AND APPARATUS FOR LEAKAGE CURRENT PROTECTION
    Publication number: 20070164750
    Abstract: An apparatus for testing the life of a leakage current protection device having a leakage current detection circuit. In one embodiment, the apparatus a trip mechanism state generator, a fault alarm generator, a ground fault simulation unit. In operation, the ground fault simulation unit generates a simulated ground fault signal during every positive half-wave of an AC power, the simulated ground fault signal is detected by the leakage current detection circuit, the leakage current detection circuit responsively generates a signal to turn a switching device into its conductive state so as to allow a current to pass therethrough, the passed current is converted into a DC voltage in accordance with a trip mechanism state generated by the trip mechanism state generator, the fault alarm circuit receives and analyzes the DC voltage and indicates whether a fault exists in the leakage current protection device.
    Type: Application
    Filed: October 26, 2006
    Publication date: July 19, 2007
    Applicant: General Protecht Group, Inc.
    Inventors: Wusheng Chen, Fu Wang, Lianyun Wang