Patents by Inventor Christina Hefele

Christina Hefele 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 Comprising a Circumferential Radial Recess Located Below an Annular Groove
    Publication number: 20080314241
    Abstract: A piston having a top part and an adjacent shaft part. The top part of the piston is provided with a field of rings encompassing at least one annular groove. A circumferential radial recess is located in the region between the upper edge of the shaft part and the annular groove. The upper diameter of the recess is smaller than the lower diameter of the recess.
    Type: Application
    Filed: August 2, 2006
    Publication date: December 25, 2008
    Applicant: KS-KOLBENSCHMIDT GMBH
    Inventors: Ralf Buschbeck, Johannes Spermann, Christina Hefele, Alfred Alexander Blau