Patents by Inventor Robert L. Bird

Robert L. Bird 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).

  • Combine harvester leveling system, combine harvester header adjusting system, and pivoting chain drive system
    Patent number: 5415586
    Abstract: A header adjusting system for a hillside combine harvester includes a master hydraulic cylinder assembly and a slave hydraulic cylinder assembly. The master hydraulic cylinder assembly is slaved to movement of the wheels relative to the combine frame. The slave hydraulic cylinder assembly is slaved to extension and retraction of the master hydraulic cylinder assembly. The slave hydraulic cylinder assembly causes the header to pivot about the longitudinal axis of the harvester in order to follow the contour of the ground. A header trimming mechanism is also provided to enable direct operator control of some of the pivoting action of the header about the longitudinal axis. A leveling system for a hillside combine harvester includes a cable and a biased, moveable reference pulley associated therewith.
    Type: Grant
    Filed: November 17, 1993
    Date of Patent: May 16, 1995
    Assignee: R. A. Hanson Company, Inc.
    Inventors: Raymond A. Hanson, Robert L. Bird, Kenneth A. Pfaff