Patents by Inventor Darrel W Gunnink

Darrel W Gunnink 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).

  • Patent number: 5957217
    Abstract: The present invention provides a shankless strip tillage tool for no-till preparation of surface soil for the planting of seeds. The strip tillage apparatus has a frame for mounting the apparatus to a tool bar mounted on a draft vehicle. The frame has a pivotally mounted tandem walking beam with a pair of angled coulters rotably mounted on the walking beam for displacing soil. The angled coulters displace soil as they are pulled through the soil by the draft vehicle and urges the soil toward the center of the strip to accomplish the no-till preparation.
    Type: Grant
    Filed: April 6, 1998
    Date of Patent: September 28, 1999
    Inventor: Darrel W Gunnink