Patents by Inventor Donald T. Sorlie

Donald T. Sorlie 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: 5277257
    Abstract: A chain is connected at its distal end to the pin at the rod end of a cylinder on an implement lift and depth control assembly. An intermediate portion of the chain is trained around a gear which rotates about the axis of the pin connecting the base end of the cylinder to the implement frame. An adjustable length, spring-biased rod is connected to the proximal end of the chain to maintain tension in the chain and operate a single point depth control valve to establish a highly accurate and repeatable depth setting which is dependent directly on cylinder rod extension and therefore less susceptible to looseness in the implement lift system.
    Type: Grant
    Filed: October 5, 1992
    Date of Patent: January 11, 1994
    Assignee: Deere & Company
    Inventors: Warren L. Thompson, Donald T. Sorlie
  • Patent number: 4579361
    Abstract: A spray cart which straddles a trailing implement hitch and supports a tank on two castering wheels and on the tractor hitch. The caster wheels have adjustable tread, and the caster wheel support structure provides additional strength to the tank support frame. A stabilizer bar is connected between the cart and the trailing implement to make them operate as a single unit. The cart serves to closely connect the trailing implement and the tractor and provide straight-line pull through the system.
    Type: Grant
    Filed: May 9, 1984
    Date of Patent: April 1, 1986
    Assignee: Deere & Company
    Inventors: Terry L. Lowe, Donald T. Sorlie, David H. Bucher
  • Patent number: 4148267
    Abstract: A packer wheel assembly is disclosed that is particularly useful for sod seeding purposes. The apparatus includes a mounting bracket having a pair of spaced arms with a packer wheel being rotatably mounted between the center portion of each of the arms. A packer pivot rod is connected between the arms at the front portion of each so that the arms pivot about a horizontal axis. A packer stop is also provided at the front of the arms rearwardly of the pivot, and an adjustable spray shield is attached to the rear of the bracket. This assembly provides the needed flexibility to follow the contour of the ground and allow the assembly to be adjusted to various cutter wheel depths with the packer wheel having a capability to follow the furrow for all selected cutter wheel depths.
    Type: Grant
    Filed: June 17, 1977
    Date of Patent: April 10, 1979
    Assignee: Deere & Company
    Inventors: Michael V. Bennett, Donald T. Sorlie