Patents by Inventor Paul J. Hijek

Paul J. Hijek 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).

  • Ultrasonic check valve inspection
    Patent number: 4920802
    Abstract: The disclosed method includes the steps of positioning an ultrasonic transmitter (50, 52) on the exterior body portion (54) of the valve (14), oriented so that the transmitted ultrasonic wave intercepts the path (46) of the closure member (30) at least at one location, and positioning an ultrasonic receiver on the body portion oriented to detect reflected ultrasonic waves when the closure member passes through such location. The valve body (20) is filled with water and the closure member is caused to move along the path. The transmitter and receiver are operated to generate an output signal trace (64) commensurate with the magnitude of the ultrasonic wave reflected from the closure member at the targeted locations along the path.
    Type: Grant
    Filed: August 5, 1988
    Date of Patent: May 1, 1990
    Assignee: Combustion Engineering, Inc.
    Inventors: Craig W. McMullin, John E. Rosenberger, Paul J. Hijek, Shahab S. Negahban