Patents by Inventor Erwin F. Link

Erwin F. Link 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).

  • Hydrostatic steering arrangement
    Patent number: 4310062
    Abstract: A steering circuit for an articulated farm tractor having front and rear frame sections pivotally interconnected with steering cylinders pivotally connected between the frame sections. An open center hydrostatic steering unit selectively directs hydraulic fluid from a pump to the steering cylinders and a pilot-operated, alternating check valve is interposed in the conduit connecting the steering mechanism with the steering cylinders.
    Type: Grant
    Filed: January 22, 1980
    Date of Patent: January 12, 1982
    Assignee: International Harvester Company
    Inventors: Erwin F. Link, William L. Schubert