Patents by Inventor Tsang-Chang Hwang

Tsang-Chang Hwang 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: 6659420
    Abstract: A manual and automatic flow control valve includes a valve body, a manual control unit, a hollow pressure-releasing device, a middle plate, an upper casing, and an electric controlled magnetic unit. The internal of the valve body has a water inlet chamber and a water outlet chamber. A plastic main water flow valve is formed therebetween for isolating the two pressure chambers. A hollow pressure-releasing device is installed in a hollow portion of a main water flow valve. An upper side of the main water flow valve is a middle plate which is installed with an upper pressure chamber. The manual control unit can push the hollow pressure-releasing device to tilt. The electric controlled magnetic unit can control the hollow pressure-releasing device to communicate with the upper pressure chamber. If water drains from the lower pressure chamber, the water will push away the main water flow valve.
    Type: Grant
    Filed: March 21, 2002
    Date of Patent: December 9, 2003
    Inventors: Tsang-Chang Hwang, Kuo-Chou Lee, Chi-Chin Hsu
  • Publication number: 20030178591
    Abstract: A manual and automatic flow control valve includes a valve body, a manual control unit, a hollow pressure-releasing device, a middle plate, an upper casing, and an electric controlled magnetic unit. The internal of the valve body has a water inlet chamber and a water outlet chamber. A plastic main water flow valve is formed therebetween for isolating the two pressure chambers. A hollow pressure-releasing device is installed in a hollow portion of a main water flow valve. An upper side of the main water flow valve is a middle plate which is installed with an upper pressure chamber. The manual control unit can push the hollow pressure-releasing device to tilt. The electric controlled magnetic unit can control the hollow pressure-releasing device to communicate with the upper pressure chamber. If water drains from the lower pressure chamber, the water will push away the main water flow valve.
    Type: Application
    Filed: March 21, 2002
    Publication date: September 25, 2003
    Inventors: Tsang-Chang Hwang, Kuo-Chou Lee, Chi-Chin Hsu
  • Patent number: 6036056
    Abstract: An automatic soap dispensing device, particularly a device which can be activated by photoelectric or infrared sensor via a control circuit, i.e., a motor reducing gear set in a drive device driving a drive wheel with a considerable torque at low speed so that an eccentric wheel on the drive wheel can push a squeezer set which in turn squeeze a soap hose to dispense liquid soap accordingly; and a micro switch is touched when the drive wheel is rotated to a certain angle to stop the motor, upon which the squeezer set returns its initial position by the inherent elasticity of the hose without any need to engage any gear with the reducing gear set and possibility of seizure between gears which may adversely affect operation of the soap dispensing device.
    Type: Grant
    Filed: May 5, 1997
    Date of Patent: March 14, 2000
    Inventors: Kuo-Chou Lee, Tsang-Chang Hwang
  • Patent number: 5611465
    Abstract: A toilet bowl is automatically cleaned by a device having an automatic liquid soap dispenser and a guided flow tube. The dispenser is provided with a timer-activated device, and the guided flow tube is connected to the water supply connection of the toilet bowl. The liquid soap is squeezed through the guided flow tube into the water supply connection, thereby allowing the water to be mixed with the liquid soap for flushing and cleaning the toilet bowl.
    Type: Grant
    Filed: March 20, 1995
    Date of Patent: March 18, 1997
    Inventors: Kuo-Chou Lee, Tsang-Chang Hwang, Aling Shu
  • Patent number: 5492247
    Abstract: An automatic soap dispenser having an infrared sensing device and associated circuitry to trigger a driver device into operation. The dynamic power of the device is generated from a motor, through a speed reducing gear to deliver a low speed, high torque driving power to a toothed piece. The toothed piece is driven forward in a direction perpendicular to the soap feeding tube of the soap storage bag, allowing liquid soap in the feeding tube to be squeezed and dispensed for hands cleaning. When the squeezing operation is accomplished, the resiliency of the feeding tube pushes the toothed piece back to its original position and is ready for the next soap dispensing.
    Type: Grant
    Filed: June 2, 1994
    Date of Patent: February 20, 1996
    Inventors: Aling Shu, Tsang-Chang Hwang, Kuo-Chou Lee