Patents by Inventor Mario Ng

Mario Ng 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).

  • Methods and apparatus for inspecting reactor pressure tubes
    Patent number: 7563022
    Abstract: An apparatus and method for determining terminal solid solubility temperature in materials capable of forming hydrides, such as reactor pressure tubes. An inspection device is positioned within the reactor pressure tube under test and a pair of annular seals are radially deployed to seal a section of the pressure tube. Any water within the sealed section is displaced through the injection of gas and the heating of the sealed section to dry the tube and the device. A probe assembly on the device is deployed to contact the interior surface of the pressure tube and measure resistivity changes in the pressure tube wall as a function of temperature. The probe assembly includes a thermocouple probe for measuring temperature and transmit and receive coils for inducing eddy currents within the pressure tube wall. The pressure tube is allowed to cool at a predetermined rate, is reheated at a predetermined rate, and is allowed to cool again.
    Type: Grant
    Filed: November 22, 2004
    Date of Patent: July 21, 2009
    Assignees: Ontario Power Generation Inc., Kinetrics, Inc.
    Inventors: Kelvin Tashiro, John H. Sedo, Mario Ng
  • METHOD AND APPARATUS FOR MEASUREMENT OF TERMINAL SOLID SOLUBILITY TEMPERATURE IN ALLOYS CAPABLE OF FORMING HYDRIDES
    Publication number: 20080130817
    Abstract: An apparatus and method for measuring terminal solid solubility in materials capable of forming hydrides, such as reactor pressure tubes. An inspection device is positioned within the reactor pressure tube under test and a pair of annular seals are radially deployed to seal a section of the pressure tube. Any water within the sealed section is displaced through the injection of gas and the heating of the sealed section to dry the tube and the device. A probe assembly on the device is deployed to contact the interior surface of the pressure tube and measure resistivity changes in the pressure tube wall as a function of temperature. The probe assembly includes a thermocouple probe for measuring temperature and transmit and receive coils for inducing eddy currents within the pressure tube wall. The pressure tube is allowed to cool at a predetermined rate, is reheated at a predetermined rate, and is allowed to cool again.
    Type: Application
    Filed: May 14, 2007
    Publication date: June 5, 2008
    Inventors: Kelvin Tashiro, John H. Sedo, Mario Ng
  • Method and apparatus for measurement of terminal solid solubility temperature in alloys capable of forming hydrides
    Publication number: 20050220252
    Abstract: An apparatus and method for measuring terminal solid solubility in materials capable of forming hydrides, such as reactor pressure tubes. An inspection device is positioned within the reactor pressure tube under test and a pair of annular seals are radially deployed to seal a section of the pressure tube. Any water within the sealed section is displaced through the injection of gas and the heating of the sealed section to dry the tube and the device. A probe assembly on the device is deployed to contact the interior surface of the pressure tube and measure resistivity changes in the pressure tube wall as a function of temperature. The probe assembly includes a thermocouple probe for measuring temperature and transmit and receive coils for inducing eddy currents within the pressure tube wall. The pressure tube is allowed to cool at a predetermined rate, is reheated at a predetermined rate, and is allowed to cool again.
    Type: Application
    Filed: November 22, 2004
    Publication date: October 6, 2005
    Inventors: Kelvin Tashiro, John Sedo, Mario Ng