Patents by Inventor Karl-Hans Kohler

Karl-Hans Kohler 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).

  • Servo valve
    Patent number: 6027096
    Abstract: The present invention concerns a servo valve, in particular for hydraulic power steering systems of motor vehicles, in the form of a rotary slide valve having a rotary slider and a control bushing which coaxially encloses the latter and is rotatable about a rotation axis, against spring force, relative to the rotary slider. The present invention includes a particular spring arrangement which has two helical compression springs lying in a radial plane of the rotation axis.
    Type: Grant
    Filed: September 23, 1998
    Date of Patent: February 22, 2000
    Assignee: Mercedes-Benz Lenkungen GmbH
    Inventors: Karl-Hans Kohler, Gerd Speidel
  • Rack-and-pinion steering system
    Patent number: 5775459
    Abstract: A rack-and-pinion steering system has a rack which is toothed on two sides and cooperates with two pinions. At least one of the pinions can be axially translated in dependence on forces acting between the rack and that pinion. This axial translation controls a clutch arrangement so that a servomotor continuously rotating in one direction can in each case be nonpositively coupled to one of the pinions or uncoupled from both pinions.
    Type: Grant
    Filed: December 22, 1995
    Date of Patent: July 7, 1998
    Assignee: Mercedes-Benz AG
    Inventors: Wolfgang Jorg, Jaromir Bordovsky, Aydogan Cakmaz, Hubert Heck, Arno Rohringer, Claus Gall, Reinhold Abt, Rainer Strass, Karl-Hans Kohler