Patents by Inventor David L. Finck

David L. Finck 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).

  • Dual mode hydrostatic steering system
    Patent number: 8167081
    Abstract: A hydrostatic steering system has a steering cylinder for coupling to steerable wheels, a gerotor pump, a steering valve and an actuator controlled mode select valve. The steering valve is mechanically and hydraulically coupled to the gerotor pump, and controls fluid communication between the gerotor pump and the steering cylinder. The steering valve has a center position wherein communication between the gerotor pump and the steering cylinder is closed. The actuator controlled mode select valve controls fluid communication between the gerotor pump and the steering cylinder independently of the steering valve.
    Type: Grant
    Filed: November 6, 2009
    Date of Patent: May 1, 2012
    Assignee: Deere & Company
    Inventors: William A. Byrd, David L. Finck
  • DUAL MODE HYDROSTATIC STEERING SYSTEM
    Publication number: 20110108353
    Abstract: The invention relates to a hydrostatic steering system. There is a need for such a system which can easily be switched between non-load reactive and load reactive modes. A steering system is provided which has a steering cylinder for coupling to steerable wheels, a gerotor pump, a steering valve and an actuator controlled mode select valve. The steering valve is mechanically and hydraulically coupled to the gerotor pump, and controls fluid communication between the gerotor pump and the steering cylinder. The steering valve has a center position wherein communication between the gerotor pump and the steering cylinder is closed. The actuator controlled mode select valve controls fluid communication between the gerotor pump and the steering cylinder independently of the steering valve.
    Type: Application
    Filed: November 6, 2009
    Publication date: May 12, 2011
    Inventors: William A. Byrd, David L. Finck