Patents by Inventor Roger F. Engelmann

Roger F. Engelmann 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: 4268057
    Abstract: A sway limiting apparatus is disclosed for three-point hitches which has both sway and non-sway settings to either permit limited lateral movement of the draft arms or maintain a constant dimension between the draft arms while the hitch is being lowered or raised. The sway limiting apparatus includes a contoured sliding block which abuts and slides on a complementary bar bracket adjustably mounted to the tractor frame. The sliding block is slotted for adjustment fore and aft along the draft arm, and it includes both inclined surface portions and a tapered surface portion. In the non-sway setting, the inclined surface portions of the sliding block bear against the bar bracket to restrict any side sway while the hitch is being raised or lowered and to maintain the distance between the hitch connection points at a constant dimension.
    Type: Grant
    Filed: September 21, 1979
    Date of Patent: May 19, 1981
    Assignee: J. I. Case Company
    Inventors: Roger F. Engelmann, James E. Thurler