Patents by Inventor Joseph L. Walkup

Joseph L. Walkup 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: 5725230
    Abstract: A tandem hitch that automatically steers a second implement so it will properly trail a first implement around corners. The hitch attaches to a tractor's three point hookup, so it is held stationary on the tractor. The first implement or attachment attaches to the back of the tractor. The second implement or implement attaches to the back of the self steering tandem hitch.A first steering apparatus maintains the implement in a proper following position during cornering by rotating the rear wheel assembly. The whole wheel assembly is rotated by the steering apparatus for proper following positioning. Without the automatic steering the second implement would underswing or overswing leaving an area untouched. The steering action accomplished by this device steers the second implement to give a true and correct trailing of the second implement.
    Type: Grant
    Filed: June 17, 1996
    Date of Patent: March 10, 1998
    Inventor: Joseph L. Walkup