Patents by Inventor Douglas L. Bruce

Douglas L. Bruce 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).

  • Method and apparatus for controlling the heat transfer of liquid coolant in continuous casting
    Patent number: 5148853
    Abstract: A method and apparatus for continuously monitoring the cooling capacity of a liquid coolant containing gas bubbles. The apparatus includes a measuring means for measuring the number density of the bubbles to infer the heat transfer characteristics of the liquid coolant, a control means for varying the amount of gas in the liquid coolant so that the number density is within a predetermined range and an electro-acoustic transducer in fluid contact with the liquid coolant capable of generating waves of sufficient intensity to cause cavitation in the liquid coolant in the area of the measuring means. In a preferred embodiment the electro-acoustic transducer is an ultrasonic horn.
    Type: Grant
    Filed: January 28, 1991
    Date of Patent: September 22, 1992
    Assignee: Aluminum Company of America
    Inventors: Ho Yu, Douglas L. Bruce, Richard C. Stiffler, David D. Leon, Francis J. Glogowski