Patents by Inventor Robert D. Kolk

Robert D. Kolk 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).

  • Planting machine with ground-conditioning drive
    Patent number: 4742785
    Abstract: A planting machine has a ground-conditioning wheel ahead of the planting mechanism. This wheel normally carries a portion of the weight of the machine. The traction thus established is utilized to generate power for the planting mechanism as the machine is moved forward. Power is transferred to the planting mechanism by a sequence of chain drives having replaceable sprockets of various diameters to establish different spacing of planting positions along the row.
    Type: Grant
    Filed: September 8, 1986
    Date of Patent: May 10, 1988
    Inventors: Howard A. Kolk, Robert D. Kolk
  • Machine for forming wire arches, and installing the ends of the arches in the ground
    Patent number: 4658538
    Abstract: A machine bends pieces of wire into an arch configuration, and then inserts the ends of the arch into the ground to form a support for a shelter film protecting a row of plants. An orbital system rotating on an axis parallel to the axis of ground wheels permits the arches to be inserted at close to zero speed relative to ground as the machine moves. The preferred form of the machine installs the film over the arches.
    Type: Grant
    Filed: October 16, 1985
    Date of Patent: April 21, 1987
    Assignee: Mechanical Transplanter
    Inventors: Howard A. Kolk, Robert D. Kolk