Patents by Inventor Kurt Kirschbaum

Kurt Kirschbaum 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: 6203047
    Abstract: A device for stabilizing the two lower steering arms (1) of a tractor, with the lower steering arms (1) actuated by a hydraulically operated power lever (9). The arms are each associated with a side strut (6) with a first single-acting hydraulic cylinder (7) for stabilizing and fixing purposes. A line connection between the first single-acting hydraulic cylinders (7) and the power lever (9) can be effected by a control valve (13). In order to center the lower steering arms (1) and set the arm to a pre-determined dimension of spread, even when no implement is attached, the line (14) which leads to the second single-acting hydraulic cylinder (10) of the power lever (9) contains a pressure-controlled first return valve. A bypass line (21) with a second return valve (22) is provided to lock in the direction opposite to that of the first return valve.
    Type: Grant
    Filed: October 5, 1999
    Date of Patent: March 20, 2001
    Assignee: GKN Walterscheid GmbH
    Inventors: Wolfgang Adamek, Heinrich Henseler, Kurt Kirschbaum