Patents by Inventor Hans G. Oellers

Hans G. Oellers 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: 4899831
    Abstract: Improved tractor frontal three-point connection apparatus with lower links attached to the front bolster at a pivot axis behind the front panelling of the tractor housing and pivotable to positions behind such panelling, the lower links having rear extensions acted on by lower ends of substantially vertical hydraulic cylinders to pivot the lower links to a substantially vertical orientation, thereby facilitating movement of lower links to inoperative positions over the front axles. Preferred embodiments include a tubular rock shaft rotatably mounted on the front bolster and having rearwardly extending cylinder-attachment lugs, opposite ends removably receiving journals of the lower links, and pocket members at each end receiving and interacting with the rear extensions of the lower links.
    Type: Grant
    Filed: April 24, 1989
    Date of Patent: February 13, 1990
    Assignee: J. I. Case Company
    Inventors: Dieter Schillings, Bernard Peters, Hans G. Oellers