Patents by Inventor Robert J. Kovalak

Robert J. Kovalak 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).

  • Intersecting bi-directional buckets for a bucket elevator system
    Patent number: 5526921
    Abstract: A bucket elevator system capable of being driven bi-directionally. The system having a plurality of pivoted buckets supported between two endless chains. Each bucket having a primary guide boss with an upper surface and a guide surface thereon. Guides arranged to contact the upper surface of the primary guide boll to restrain the pivotal movement of the buckets.
    Type: Grant
    Filed: March 16, 1993
    Date of Patent: June 18, 1996
    Assignee: FMC Corporation
    Inventors: Robert J. Kovalak, Harold E. Patterson, Paul I. Sleppy
  • Material transport bucket
    Patent number: D336091
    Type: Grant
    Filed: September 13, 1991
    Date of Patent: June 1, 1993
    Assignee: FMC Corporation
    Inventors: Robert J. Kovalak, Harold E. Patterson, Paul I. Sleppy