Patents by Inventor Lu Huayang

Lu Huayang 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).

  • Patent number: 7859368
    Abstract: The present invention provides a circuit interrupting device which contains four pairs of contacts to electrically connect/disconnect to an input power source to a user accessible load and an output power end. The present invention also provides a simulated leakage current generating switch, which is capable of automatically generating a simulated current to test the circuit interrupting device when the power lines are properly wired and in a tripped state. The present invention further provides a reset switch which allows reset when the power lines are properly wired and the reset button is depressed. In addition, the present invention provides a dual-functioned test button which can manually generate a simulated leakage current when a first-level test button is depressed, and can perform a mechanical trip when a second-level test button is depressed.
    Type: Grant
    Filed: December 5, 2007
    Date of Patent: December 28, 2010
    Inventors: Huadao Huang, Lu Huayang
  • Patent number: 7538993
    Abstract: The present invention provides a circuit interrupting device which can test the conditions of the components in the circuit interrupting device (i.e., the end-of-life test) through the depression of a test button. The circuit interrupting device also possesses reverse wiring protection, including the ability to cutoff power on the user accessible plugs of the face plate when the device is reverse wired or miswired. The circuit interrupting device contains a test button, a reset button, and a series of circuits (including, but not limited to, a main control circuit, an end-of-life detection circuit, and a reset/trip circuit). A depression of the test button generates a simulated fault, which is detected by the main control circuit. When the components in the main control circuit work properly, a control signal is generated by the main control circuit and transmitted to the end-of-life detection circuit to activate the reset/trip circuit and generated an indication signal.
    Type: Grant
    Filed: October 24, 2006
    Date of Patent: May 26, 2009
    Inventors: Huadao Huang, Lu Huayang
  • Publication number: 20090091869
    Abstract: The present invention provides a circuit interrupting device which contains four pairs of contacts to electrically connect/disconnect to an input power source to a user accessible load and an output power end. The present invention also provides a simulated leakage current generating switch, which is capable of automatically generating a simulated current to test the circuit interrupting device when the power lines are properly wired and in a tripped state. The present invention further provides a reset switch which allows reset when the power lines are properly wired and the reset button is depressed. In addition, the present invention provides a dual-functioned test button which can manually generate a simulated leakage current when a first-level test button is depressed, and can perform a mechanical trip when a second-level test button is depressed.
    Type: Application
    Filed: December 5, 2007
    Publication date: April 9, 2009
    Inventors: Huadao Huang, Lu Huayang
  • Publication number: 20080192393
    Abstract: The present invention provides a circuit interrupting device which comprises a novel reset mechanism to allow a user to test whether the device is wired properly. The novel reset mechanism includes a reset conducting apparatus which contains a reset start switch (KR-4). The KR-4 contains a first conducting pin, a second conducting pin, and a conducting bridge. When the reset button is depressed and the device is wired properly, the KR-4 is closed to allow the conducting bridge to be in contact with both the first and the second conducting pins so as to reset the device. The present invention also provides a circuit interrupting device which is capable of automatically checking the components of the circuit interrupting device (i.e., the end of life test) through a novel status test switch (KR-1). The KR-1 comprises a flexible metal piece and a simulated leakage current controlling resistor, which is located underneath of the flexible metal piece.
    Type: Application
    Filed: July 6, 2007
    Publication date: August 14, 2008
    Inventors: Huadao Huang, Lu Huayang
  • Patent number: 7411766
    Abstract: The present invention provides a circuit interrupting device which comprises a novel reset mechanism to allow a user to test whether the device is wired properly. The novel reset mechanism includes a reset conducting apparatus which contains a reset start switch (KR-4). The KR-4 contains a first conducting pin, a second conducting pin, and a conducting bridge. When the reset button is depressed and the device is wired properly, the KR-4 is closed to allow the conducting bridge to be in contact with both the first and the second conducting pins so as to reset the device. The present invention also provides a circuit interrupting device which is capable of automatically checking the components of the circuit interrupting device (i.e., the end of life test) through a novel status test switch (KR-1). The KR-1 comprises a flexible metal piece and a simulated leakage current controlling resistor, which is located underneath of the flexible metal piece.
    Type: Grant
    Filed: July 6, 2007
    Date of Patent: August 12, 2008
    Inventors: Huadao Huang, Lu Huayang
  • Patent number: 7295415
    Abstract: The present invention provides a set of circuits which is capable of performing an automatic check on main components of a circuit interrupting device when the circuit interrupting device is properly powered and the device is at a tripped state to determine whether these main components function normally. The results of the automatic check can be detected by depressing a reset button in the circuit interrupting device. If the reset button can be depressed, the main components function normally. Alternatively, the results can be automatically displayed by a showing on the face lid of the circuit interrupting device of either a green light, which means that the main components function normally, or a red or yellow light or no light, which means that at least one of the main components in the circuit interrupting device does not function properly.
    Type: Grant
    Filed: September 21, 2006
    Date of Patent: November 13, 2007
    Inventors: Huadao Huang, Lu Huayang
  • Publication number: 20070041134
    Abstract: The present invention provides a circuit interrupting device which can test the conditions of the components in the circuit interrupting device (i.e., the end-of-life test) through the depression of a test button. The circuit interrupting device also possesses reverse wiring protection, including the ability to cutoff power on the user accessible plugs of the face plate when the device is reverse wired or miswired. The circuit interrupting device contains a test button, a reset button, and a series of circuits (including, but not limited to, a main control circuit, an end-of-life detection circuit, and a reset/trip circuit). A depression of the test button generates a simulated fault, which is detected by the main control circuit. When the components in the main control circuit work properly, a control signal is generated by the main control circuit and transmitted to the end-of-life detection circuit to activate the reset/trip circuit and generated an indication signal.
    Type: Application
    Filed: October 24, 2006
    Publication date: February 22, 2007
    Inventors: Huadao Huang, Lu Huayang
  • Publication number: 20070014068
    Abstract: The present invention provides a set of circuits which is capable of performing an automatic check on main components of a circuit interrupting device when the circuit interrupting device is properly powered and the device is at a tripped state to determine whether these main components function normally. The results of the automatic check can be detected by depressing a reset button in the circuit interrupting device. If the reset button can be depressed, the main components function normally. Alternatively, the results can be automatically displayed by a showing on the face lid of the circuit interrupting device of either a green light, which means that the main components function normally, or a red or yellow light or no light, which means that at least one of the main components in the circuit interrupting device does not function properly.
    Type: Application
    Filed: September 21, 2006
    Publication date: January 18, 2007
    Inventors: Huadao Huang, Lu Huayang