Patents by Inventor Reynold Barkstrom

Reynold Barkstrom 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).

  • Variable speed feed roll drive mechanism for forage harvesters
    Patent number: 3945175
    Abstract: A variable speed feed roll drive mechanism as provided for a forage harvester, the mechanism including a reversible hydrostatic transmission having its input shaft coupled with the chopper input shaft, the output of the transmission being coupled with the feed rolls. The hydrostatic transmission, having an infinitely variable range of output speeds provides the capability to infinitely vary the length of cut of crops passing through the chopper.
    Type: Grant
    Filed: October 2, 1973
    Date of Patent: March 23, 1976
    Assignee: International Harvester Company
    Inventors: Reynold Barkstrom, Calvin P. Rickerd, William C. Swanson