Patents by Inventor Andrew A. Hetra, Jr.

Andrew A. Hetra, Jr. 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).

  • Patent number: 4364468
    Abstract: This invention relates to apparatus for coordinating the indexing movement of a conveyor with pivotal movement of a kickout arm for removing workpieces from its delivery end. A double acting fluid powered cylinder alternately indexes the loop and pivots the kickout upon reciprocating movement of first and second piston rods thereof. Preferably, a rack is provided extending axially from the first of the rods. A pinion engages the rack and is operatively connected and disconnected from the loop by a clutch upon stroke of the rod in opposite directions. A collet operatively connects the second piston rod to the kickout arm when the loop is at rest and disconnects said arm therefrom when the loop is being driven.
    Type: Grant
    Filed: March 6, 1981
    Date of Patent: December 21, 1982
    Assignee: United States Steel Corporation
    Inventors: Andrew A. Hetra, Jr., Charles W. Jacob
  • Patent number: 4165866
    Abstract: A device for skimming floating material from a body of liquid, particularly useful with a pipe galvanizing apparatus for skimming dross from a zinc bath. The device includes paddles pivoted to a reciprocating carriage for dragging floating material to an edge of the vessel. The paddles pivot to positions in which their faces lie parallel with the direction of carriage movement to avoid pushing material back toward the interior of the vessel during return strokes of the carriage.
    Type: Grant
    Filed: March 31, 1978
    Date of Patent: August 28, 1979
    Assignee: United States Steel Corporation
    Inventors: Andrew A. Hetra, Jr., Charles W. Jacob