Patents by Inventor Jang-Wan Cho

Jang-Wan Cho 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).

  • Valve test apparatus and methods for testing a solenoid valve or a venturi valve
    Patent number: 7401494
    Abstract: A valve test apparatus, a solenoid valve test method and a venturi valve test method are provided. The valve test apparatus may include a gas supply unit, a solenoid valve holding unit, a first measurement unit, a venturi valve holding unit, a second measurement unit, a timer unit and/or a power supply unit. The solenoid valve holding unit may be connected to one end of the gas supply unit. The first measurement unit may be connected to the solenoid valve holding unit. The venturi valve holding unit, on which a venturi valve to be tested may be arranged. The venturi valve may be selectively connected to the solenoid valve holding unit together with the first measurement unit. The second measurement unit may be connected to the venturi valve. The timer unit may measure a time interval between when the solenoid valve is activated and when a measured value by the first measurement unit or second measurement unit is equivalent to a desired value.
    Type: Grant
    Filed: July 21, 2006
    Date of Patent: July 22, 2008
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Soo-Min Kim, Ho-Sung Eum, Jang-Wan Cho
  • Valve test apparatus, solenoid valve test method and venturi valve test method
    Publication number: 20070028665
    Abstract: A valve test apparatus, a solenoid valve test method and a venturi valve test method are provided. The valve test apparatus may include a gas supply unit, a solenoid valve holding unit, a first measurement unit, a venturi valve holding unit, a second measurement unit, a timer unit and/or a power supply unit. The solenoid valve holding unit may be connected to one end of the gas supply unit. The first measurement unit may be connected to the solenoid valve holding unit. The venturi valve holding unit, on which a venturi valve to be tested may be arranged. The venturi valve may be selectively connected to the solenoid valve holding unit together with the first measurement unit. The second measurement unit may be connected to the venturi valve. The timer unit may measure a time interval between when the solenoid valve is activated and when a measured value by the first measurement unit or second measurement unit is equivalent to a desired value.
    Type: Application
    Filed: July 21, 2006
    Publication date: February 8, 2007
    Inventors: Soo-Min Kim, Ho-Sung Eum, Jang-Wan Cho