Patents by Inventor Stefan Foester

Stefan Foester 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: 6145485
    Abstract: For a variable valve operating mechanism for an internal-combustion engine having variable valve lifts, which can be achieved at constant opening angles, variable valve opening angles are achieved in the case of particularly small valve lifts. To do so, the rocker axis of a valve lever, which is essentially parallel to the axis of rotation of the camshaft, can be dynamically displaced relative to a camshaft along a path in a controlled manner such that, when the rocker axis is displaced, the valve lever is activated for the valve operation by way of a roller which is controlled only approximately from the starting area to the end area of a cam tip of a radial cam on the camshaft.
    Type: Grant
    Filed: June 7, 1999
    Date of Patent: November 14, 2000
    Assignee: Bayerische Motoren Werke Aktiengesellschaft
    Inventors: Michael Bidlingmaier, Gert Fischer, Stefan Foester