Patents Represented by Attorney Donald MacKay

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  • Controlled rotation self-inverting hot top casing
    Patent number: 4431158
    Abstract: A hot top casing for cooperation with an ingot mold body is provided having a depending portion from which a pair of trunnions extend away from the casing and a second pair of trunnions extend toward said casing whereby each of said pairs are displaced vertically with respect to the center of gravity with one pair above and one pair below said center.
    Type: Grant
    Filed: August 17, 1981
    Date of Patent: February 14, 1984
    Assignee: Koppers Company, Inc.
    Inventor: Donald C. Atkinson