Patents by Inventor Poh Heng Teh

Poh Heng Teh 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).

  • Nondestructive adhesion testing by ultrasonic cavitation
    Patent number: 6604420
    Abstract: A method is provided for nondestructive adhesion testing of a coating on a component surface through ultrasonic cavitation. The disclosed method includes submerging a tip end of a vibratory horn in a liquid medium and operating a converter, coupled to the vibratory horn, at a frequency and an amplitude to generate a cavitation field within the liquid medium. A first portion of a component having an adhered coating on at least a portion of the component is moved into the cavitation field. Areas of the coating that are poorly adhered to the component are located by the removing areas of the coating that are poorly adhered, while not removing areas of the coating that are properly adhered to the component.
    Type: Grant
    Filed: December 26, 2001
    Date of Patent: August 12, 2003
    Assignee: Caterpillar Inc
    Inventors: Robert Elmer Hawbaker, Leonard George Wheat, Jason William Sanders, Poh Heng Teh
  • NONDESTRUCTIVE ADHESION TESTING BY ULTRASONIC CAVITATION
    Publication number: 20030115961
    Abstract: A method is provided for nondestructive adhesion testing of a coating on a component surface through ultrasonic cavitation. The disclosed method includes submerging a tip end of a vibratory horn in a liquid medium and operating a converter, coupled to the vibratory horn, at a frequency and an amplitude to generate a cavitation field within the liquid medium. A first portion of a component having an adhered coating on at least a portion of the component is moved into the cavitation field. Areas of the coating that are poorly adhered to the component are located by the removing areas of the coating that are poorly adhered, while not removing areas of the coating that are properly adhered to the component.
    Type: Application
    Filed: December 26, 2001
    Publication date: June 26, 2003
    Inventors: Robert Elmer Hawbaker, Leonard George Wheat, Jason William Sanders, Poh Heng Teh