Patents by Inventor Erling Roynberg

Erling Roynberg 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).

  • Rotary agricultural tool
    Patent number: 5272861
    Abstract: A rotary agricultural tool which may be incorporated in a number of different types of agricultural equipment, such as in a device for chopping up bulk material is disclosed. The rotary tool has an elongate cutter body mounted in a frame for rotation about a substantially horizontal axis and carrying on its outer periphery pivotally mounted cutter blades, a housing extending partly around the cutter body, and feed rollers for feeding the bulk material to the cutter body. The blades are arranged in pairs of blades.
    Type: Grant
    Filed: March 3, 1992
    Date of Patent: December 28, 1993
    Assignee: Kverneland Underhaug AS
    Inventor: Erling Roynberg