Patents by Inventor Peter de Graff

Peter de Graff 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).

  • Transport device for pull-type swathers and the like
    Patent number: 4455034
    Abstract: A hitch and pivot frame are pivotally attached to a main frame of a pull-type swather and a main or inner wheel is attached to the pivot frame. By removal or unlatching of a restraining device, the pivot frame can pivot with the wheel, through approximately 90.degree. and into a transport position without unhooking the tractor. The outer wheel is moved into the transport position by manual means in a conventional manner. The main or inner wheel can be in a cambered position or in a toed-out position depending upon field conditions.
    Type: Grant
    Filed: August 16, 1982
    Date of Patent: June 19, 1984
    Assignee: Canadian Co-Operative Implements Limited
    Inventors: Peter de Graff, Donald Schweitz