Patents by Inventor Elwin J. Lewoczko

Elwin J. Lewoczko 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).

  • Hard-surfaced screw conveyor for centrifuges
    Patent number: 3977515
    Abstract: A hard-surfaced screw conveyor for centrifuges has a helical metal blade with a plurality of wear-resisting segments mounted on one side thereof, there being mating parts on the opposed surfaces of the segments and the blade which are slidably interengaged to prevent radial outward and axial relative movements of the segments and the blade.
    Type: Grant
    Filed: December 16, 1974
    Date of Patent: August 31, 1976
    Assignee: Bird Machine Company, Inc.
    Inventor: Elwin J. Lewoczko