Patents by Inventor Huadao Huang

Huadao Huang 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: 9728951
    Abstract: The present disclosure provides an improved leakage protection socket with reverse connection protection function. The electromagnetic tripping mechanism comprises a trip coil, an iron core and a permanent magnet that fit with a return spring, the iron core has, in its front end, a boss to pull the lock for horizontal movement, the movable input contacts are clamped by a rib slot of an upper tripper that can moves upward and downward along with the reset button. There is also provided a reverse connection trip device, which has a slope that coordinates with the boss of the iron core, upon reverse connection, the trip coil generates a magnetic field in the same orientation with the permanent magnet.
    Type: Grant
    Filed: April 28, 2014
    Date of Patent: August 8, 2017
    Assignee: Wenzhou Van-Sheen Electric Appliance Co., Ltd.
    Inventor: Huadao Huang
  • Patent number: 9203232
    Abstract: The present invention relates generally to a leakage detection protective circuit. This leakage detection protective circuit includes a rectification circuit, a current-limiting resistance, a controlled silicon rectifier (SCR), a power supply main circuit switch linked with a reset button and a tripping coil with a built-in iron core. The rectification circuit, tripping coil, and SCR are connected in series with each other, forming a circuit. The control pole of the SCR is connected, through the current-limiting resistance and the diode, to the shielding layer of the power output wires. When a leakage failure occurs, the shielding layer connected to the control pole of the controlled silicon rectifier becomes electrified, triggering the controlled silicon rectifier. A magnetic field is then generated within the tripping coil and its built-in iron core moves, causing the reset button to trip. This invention is characterized by a compact circuit and robust operation.
    Type: Grant
    Filed: May 16, 2011
    Date of Patent: December 1, 2015
    Inventor: HuaDao Huang
  • Publication number: 20150280430
    Abstract: A leakage detection protection circuit with function of regular self-examination of separate elements comprises a power input port, a power user port, a power output port, a reset button, main loop switches, dual induction coils, a tripping coil, a silicon controlled rectifier, a control chip, and a regular self-examination circuit. The regular self-examination circuit includes a self-examination chip and a second silicon controlled rectifier. A trigger electrode of the silicon controlled rectifier is connected to a drive pin of the control chip and to an A/D conversion interface of the self-examination chip. An anode of the silicon controlled rectifier is connected to another A/D conversion interface of the self-examination chip.
    Type: Application
    Filed: March 13, 2015
    Publication date: October 1, 2015
    Inventor: Huadao Huang
  • Patent number: 9088152
    Abstract: A leakage detection protection circuit comprises null and live wires in power input and power output ends. Also included are induction coil (L1), self-excitation coil (L2), control chip (IC1), silicon controlled rectifier (V4), rectifier diode (V1), resistor (R1), filter capacitor (C3), trip coil (SOL) with built-in iron core, and main circuit switches (KR2-1, KR2-2) linked with a reset button. At least one single-pole double-throw analog power supply switch (KR-2) is linked with the reset button and comprises a dynamic contact rod (C) and first and second static contact terminals (A) and (B). The analog power supply switch is configured so that the circuit has test analog leakage current, working power supply, or no current based on the position of the dynamic contact rod (C) with respect to the static contact terminals and also based on the position of the reset button.
    Type: Grant
    Filed: May 8, 2012
    Date of Patent: July 21, 2015
    Inventor: Huadao Huang
  • Patent number: 9048559
    Abstract: An electrical receptacle with a baffle latching mechanism can prevent an electroshock accident by keeping the baffle and baffle latching mechanism from moving. A baffle latching mechanism for an electrical receptacle, comprises a rectilinear baffle latch comprising a first side perpendicular to a second side, a positioning groove between a first end and a second end of the first side, a platform at the bottom of the positioning groove, and a positioning convex pin projecting from the second side of the baffle latch.
    Type: Grant
    Filed: May 8, 2012
    Date of Patent: June 2, 2015
    Inventor: Huadao Huang
  • Publication number: 20140321006
    Abstract: The present disclosure provides an improved leakage protection socket with reverse connection protection function. The electromagnetic tripping mechanism comprises a trip coil, an iron core and a permanent magnet that fit with a return spring, the iron core has, in its front end, a boss to pull the lock for horizontal movement, the movable input contacts are clamped by a rib slot of an upper tripper that can moves upward and downward along with the reset button. There is also provided a reverse connection trip device, which has a slope that coordinates with the boss of the iron core, upon reverse connection, the trip coil generates a magnetic field in the same orientation with the permanent magnet.
    Type: Application
    Filed: April 28, 2014
    Publication date: October 30, 2014
    Applicant: Wenzhou Van-Sheen Electric Appliance Co. Ltd.
    Inventor: Huadao Huang
  • Patent number: 8858245
    Abstract: A power outlet may comprise an enclosure with at least one plug jack, a reset button comprising at least one integrally formed extension latch arm, the extension latch arm comprising at least one positioning pin, and at least one baffle configured to selectively block at least a portion of the plug jack, the baffle comprising an outer wall comprising a face, a pin slit, and a leg. The extension latch arm positioning pin is configured to selectively press against the outer wall face when the extension latch arm is in an upward position. The extension latch arm positioning pin is configured to selectively enter the outer wall pin slit when the extension latch arm is in a downward position.
    Type: Grant
    Filed: February 21, 2013
    Date of Patent: October 14, 2014
    Inventor: Huadao Huang
  • Patent number: 8760849
    Abstract: An electrical protection circuit comprises a circuit board, an induction coil, a self-exciting coil, a control chip, a silicon controlled rectifier, a rectifier diode, a resistor, a filtration capacitor, a trip coil with iron core, a group of main circuit switches, and a reset button. An analog electric single-pole double-throw switch linked with the reset button comprises a traveling contact lever, a first static contact jaw, and a second static contact jaw. When the reset button is in a tripped or reset state, the traveling contact lever is connected with the second static contact jaw and the switch is in a closed state. When the reset button is pressed down, the traveling contact lever disconnects from the second static contact jaw, contacts the first static contact jaw, then disconnects from the first static contact jaw and returns to the closed state with the second static contact jaw.
    Type: Grant
    Filed: June 14, 2012
    Date of Patent: June 24, 2014
    Inventor: Huadao Huang
  • Patent number: 8736279
    Abstract: An electric leakage detection protective circuit comprises two normally closed switches. The live wire at the power output terminal is connected to the live wire output plug bush at the power output plug jack via a normally closed switch and constitutes a group of live wire conductors at the power output side; the neutral wire at power output terminal is connected to the neutral wire output plug bush at the power output plug jack via a normally closed switch and constitutes a group of neutral wire conductors at the power output side. When the outlet reset button is at either a trip position or a reset position, the power live wire output terminal is connected to the live wire output plug bush of the power output plug jack, and the power neutral wire output terminal is connected to the neutral output plug bush of the power output plug jack.
    Type: Grant
    Filed: January 23, 2012
    Date of Patent: May 27, 2014
    Inventor: Huadao Huang
  • Patent number: 8550829
    Abstract: A power outlet includes a casing, a middle-layer support and at least one safety shield device. The middle-layer support includes at least one conductive plug bush and provides guiding jacks corresponding to the position of the conductive plug bush. The safety shield device has a left shield, a right shield and a spring. Each left and right shield extends a shield foot from the underside, respectively. The middle-layer support further includes sliding platforms for movement of the left shield and the right shield. The sliding platform has location holes for insertion of the shield feet. When the left shield and right shield lock, two shield feet respectively match against an opposite inner edge of two location holes on the sliding platform. When the left shield and right shield open, the guiding jack on the middle-layer support exposes.
    Type: Grant
    Filed: December 8, 2011
    Date of Patent: October 8, 2013
    Inventor: Huadao Huang
  • Patent number: 8525372
    Abstract: A dimming switch comprises an enclosure with a mounting surface, a flat plate button mounted on the mounting surface, a dimming button, a tripping button, a dimmer mounted inside the enclosure, a resetting/tripping device, a dimming control circuit, a power input end configured to connect to a live wire of a power supply, and a power output end configured to connect to an electrical load. Pressing the flat plate button resets the resetting/tripping device, thereby electrically connecting the power input end with the power output end through the dimming control circuit. The dimming button is configured so that rotating the dimming button and pressing the dimming button up and down regulates the output voltage of the dimming control circuit. The tripping button and resetting/tripping device trip so that the electrical connection between the power input end and the power output end will be cut off.
    Type: Grant
    Filed: May 28, 2010
    Date of Patent: September 3, 2013
    Inventor: Huadao Huang
  • Publication number: 20130171847
    Abstract: A power outlet may comprise an enclosure with at least one plug jack, a reset button comprising at least one integrally formed extension latch arm, the extension latch arm comprising at least one positioning pin, and at least one baffle configured to selectively block at least a portion of the plug jack, the baffle comprising an outer wall comprising a face, a pin slit, and a leg. The extension latch arm positioning pin is configured to selectively press against the outer wall face when the extension latch arm is in an upward position. The extension latch arm positioning pin is configured to selectively enter the outer wall pin slit when the extension latch arm is in a downward position.
    Type: Application
    Filed: February 21, 2013
    Publication date: July 4, 2013
    Inventor: Huadao Huang
  • Patent number: 8472155
    Abstract: The leakage detection protection circuit comprises power input and output ends, an induction coil, a self-excitation coil, a control chip, a controlled silicon rectifier, a commutation diode, a resistor, a current limiting resistor, a filter capacitor, a tripping coil, a pair of main circuit switches linked with a reset button, a test button, and first and second test switches. When the reset button is in a tripped state, the first test switch is open and the second test switch is closed. Additionally, when the reset button is pressed down, the first test switch changes from open to closed, the second test switch remains closed, and the neutral wire of the power input end is connected to the output end of the live wire of the power input end to enable generation of an analog leakage current. Finally, when the reset button is reset, the first and second test switches are both open.
    Type: Grant
    Filed: July 13, 2011
    Date of Patent: June 25, 2013
    Inventor: Huadao Huang
  • Patent number: 8462471
    Abstract: The present invention provides a circuit interrupting device which comprises a leakage current detection and protection circuit containing a simulated leakage current generation circuit which is capable of automatically generating a simulated leakage current when the circuit interrupting device is properly wired and in a tripped state to automatically test the functions of the key components of the circuit interrupting device. The simulated leakage current generation circuit comprises a normally closed switch and a normally open switch. The leakage current detection and protection circuit further comprises a normal status indicator light and a power output indicator light to indicate whether the circuit interrupting device is working properly and/or reverse wired. The circuit interrupting device further comprises a reset switch, a pair of discharged metal pieces, and four pairs of circuit interrupting contacts.
    Type: Grant
    Filed: November 19, 2009
    Date of Patent: June 11, 2013
    Inventors: Huadao Huang, Huayang Lu
  • Patent number: 8382497
    Abstract: A power outlet comprises an enclosure with a plug jack, a reset button comprising an extension arm, a transition contour on the extension arm and at least one safety shield configured to selectively block at least a portion of the plug jack. The safety shield comprises an outer wall and a pin groove. A shield latch comprises a travel section configured to elastically contact the extension arm, a stop section in contact with the safety shield, the stop section comprising a convex pin, and a self-reset mechanism. When the extension arm is in an upward position, the travel section presses against it, and when the extension arm is in a downward position, the travel section has a buffer space. When the travel section presses against the extension arm, the convex pin presses against the outer wall to lock the safety shield.
    Type: Grant
    Filed: September 30, 2011
    Date of Patent: February 26, 2013
    Inventor: Huadao Huang
  • Publication number: 20120320485
    Abstract: An electrical protection circuit comprises a circuit board, an induction coil, a self-exciting coil, a control chip, a silicon controlled rectifier, a rectifier diode, a resistor, a filtration capacitor, a trip coil with iron core, a group of main circuit switches, and a reset button. An analog electric single-pole double-throw switch linked with the reset button comprises a traveling contact lever, a first static contact jaw, and a second static contact jaw. When the reset button is in a tripped or reset state, the traveling contact lever is connected with the second static contact jaw and the switch is in a closed state. When the reset button is pressed down, the traveling contact lever disconnects from the second static contact jaw, contacts the first static contact jaw, then disconnects from the first static contact jaw and returns to the closed state with the second static contact jaw.
    Type: Application
    Filed: June 14, 2012
    Publication date: December 20, 2012
    Inventor: Huadao Huang
  • Publication number: 20120287537
    Abstract: A leakage detection protection circuit comprises null and live wires in power input and power output ends. Also included are induction coil (L1), self-excitation coil (L2), control chip (IC1), silicon controlled rectifier (V4), rectifier diode (V1), resistor (R1), filter capacitor (C3), trip coil (SOL) with built-in iron core, and main circuit switches (KR2-1, KR2-2) linked with a reset button. At least one single-pole double-throw analog power supply switch (KR-2) is linked with the reset button and comprises a dynamic contact rod (C) and first and second static contact terminals (A) and (B). The analog power supply switch is configured so that the circuit has test analog leakage current, working power supply, or no current based on the position of the dynamic contact rod (C) with respect to the static contact terminals and also based on the position of the reset button.
    Type: Application
    Filed: May 8, 2012
    Publication date: November 15, 2012
    Inventor: Huadao Huang
  • Publication number: 20120287572
    Abstract: An electrical receptacle with a baffle latching mechanism can prevent an electroshock accident by keeping the baffle and baffle latching mechanism from moving. A baffle latching mechanism for an electrical receptacle, comprises a rectilinear baffle latch comprising a first side perpendicular to a second side, a positioning groove between a first end and a second end of the first side, a platform at the bottom of the positioning groove, and a positioning convex pin projecting from the second side of the baffle latch.
    Type: Application
    Filed: May 8, 2012
    Publication date: November 15, 2012
    Inventor: Huadao HUANG
  • Patent number: 8300368
    Abstract: The present invention provides a circuit interrupting device, preferably a ground fault circuit interrupter, which provides a quick and reliable connection/disconnection of electrical continuity through a combined use of a reset spring and a quick trip spring; an innovative circuit interrupting assembly containing a pair of input flexible metal pieces, a pair of user accessible load flexible metal pieces, and two pairs of fixed contacts on the load terminals; an automatic end-of-life testing mechanism by way of a simulated leakage current metal piece assembly; a reverse wiring protection by way of a reset start switch; an electrical surge protection through a power discharge mechanism; and a periodical end-of-life testing using a timer chip.
    Type: Grant
    Filed: July 14, 2008
    Date of Patent: October 30, 2012
    Assignee: Huadao Huang
    Inventors: Huadao Huang, Huayang Lu
  • Patent number: 8299358
    Abstract: A panel for mounting to a power outlet or switch comprises a panel holder configured to secure to the power outlet or switch. A slide lock is configured to clip onto the panel holder in a sliding way. A panel case is configured to clip to the slide lock. The panel case is secured to the panel holder through the slide lock.
    Type: Grant
    Filed: July 5, 2010
    Date of Patent: October 30, 2012
    Inventor: Huadao Huang