Patents by Inventor Rolf Greeb

Rolf Greeb 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).

  • Fluid control valve
    Patent number: 4648420
    Abstract: A control valve with a control slider (9) comprising bead-type areas (17, 18, 19), by means of which the control slider is slidably arranged in the cylinder bore (8). The areas (17) and (18) isolate the inlet (2) from the outlet (3), while the area (19) isolates the outlet (3) from the leakage oil port (4). The clearance between the areas (17) and (18) of the control slider (9) and the wall of the cylinder bore (8) is smaller than the clearance between the area (19) of the control slider (9) and the wall of the cylinder bore (8). The output pressure is kept within close tolerances with only minor leakage losses.
    Type: Grant
    Filed: May 13, 1985
    Date of Patent: March 10, 1987
    Assignee: Alfred Teves GmbH
    Inventors: Lothar Kunze, Rolf Greeb, Ralf Bender