Patents by Inventor Angus Hellawell

Angus Hellawell 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 for reducing macrosegregation in alloys
    Patent number: 4462454
    Abstract: Macrosegregation in metal alloy castings and other alloys having similar solidification behavior is reduced by slowly rotating a mold or the like containing the liquid alloy about an axis at an acute angle to the vertical from the time the liquid alloy is poured into the mold until substantially all of the alloy has solidified. The mold is rotated at a speed below that which produces a centrifuging effect or causes stirring or agitation of the interdendritic liquid.
    Type: Grant
    Filed: November 12, 1981
    Date of Patent: July 31, 1984
    Assignee: Michigan Technological University
    Inventor: Angus Hellawell