Patents by Inventor Alexander Leonhardt

Alexander Leonhardt 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).

  • Sieving roller conveyor for green pellets
    Patent number: 4316543
    Abstract: This invention relates to a sieving roller conveyor for transporting green pellets and for sieving off fines. The conveyor comprises a series of horizontally disposed rollers which are alternately spaced to provide a cleaning clearance and a sieving clearance. The rollers extend transversely to the direction in which pellets are to be conveyed and are rotatably mounted in a frame and provided with drive mechanism for the rotation of the rollers in the direction in which the pellets are to be conveyed.
    Type: Grant
    Filed: May 19, 1980
    Date of Patent: February 23, 1982
    Assignee: Dravo Corporation
    Inventor: Alexander Leonhardt