Patents by Inventor Helmut Schle?mann

Helmut Schle?mann 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).

  • Piston for a two-cycle engine
    Patent number: 7331276
    Abstract: A piston for a two-cycle engine having a piston head and a piston wall in which are disposed wrist pin eyes. At least one undercut is formed between the underside of the piston head and the wrist pin eyes at a distance from the piston head. The undercut extends from the interior of the piston toward the piston wall. A respective thickened portion is provided in at least one region of the piston that is rotationally shifted about the longitudinal axis of the piston by 90° relative to one of the wrist pin eyes. The thickened portion is disposed at a distance below the piston head and extends into the interior of the piston.
    Type: Grant
    Filed: January 20, 2006
    Date of Patent: February 19, 2008
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Helmut Schleβmann, Tobias Wurster, Andreas Bähner, Ralf-Rainer Kemmler