Patents by Inventor Jackie Hao

Jackie Hao 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).

  • Electric vehicle supply equipment and a method of determining a state of a contactor in electric vehicle supply equipment
    Patent number: 10150374
    Abstract: Electric vehicle supply equipment includes a contactor having a first set of contacts and a second set of contacts, an amplifier circuit electrically connected to the load side output of the first set of contacts via a first connection and to the load side output of the second set of contacts via a second connection, the amplifier circuit being structured to amplify a voltage difference between a first voltage at the first connection and a second voltage at the second connection, and control electronics structured to compare the amplified voltage difference to a threshold voltage and to determine whether the first and second sets of contacts are closed based on the comparison between the amplified voltage difference and the threshold voltage.
    Type: Grant
    Filed: October 28, 2016
    Date of Patent: December 11, 2018
    Assignee: EATON INTELLIGENT POWER LIMITED
    Inventors: Tom Xiong, Jackie Hao, Andrew Yang, Darron Kirby Lacey
  • Arc fault circuit interrupter test apparatus and methods
    Patent number: 9671466
    Abstract: An apparatus for testing an arc fault circuit interrupter includes an AC signal generator circuit configured to be capacitively coupled to an AC power line and to induce an AC signal thereon and a control circuit configured to control the AC signal generator circuit to selectively enable and disable generation of the AC signal responsive to a waveform of an AC power voltage of the AC power line.
    Type: Grant
    Filed: September 23, 2015
    Date of Patent: June 6, 2017
    Assignee: Eaton Corporation
    Inventors: Saivaraprasad Murahari, Tom Xiong, Jackie Hao
  • ARC FAULT CIRCUIT INTERRUPTER TEST APPARATUS AND METHODS
    Publication number: 20170082691
    Abstract: An apparatus for testing an arc fault circuit interrupter includes an AC signal generator circuit configured to be capacitively coupled to an AC power line and to induce an AC signal thereon and a control circuit configured to control the AC signal generator circuit to selectively enable and disable generation of the AC signal responsive to a waveform of an AC power voltage of the AC power line.
    Type: Application
    Filed: September 23, 2015
    Publication date: March 23, 2017
    Inventors: Saivaraprasad Murahari, Tom Xiong, Jackie Hao