Patents by Inventor Stefan Kohnle

Stefan Kohnle 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).

  • Multi-part piston for an internal combustion engine
    Patent number: 8087395
    Abstract: A multi-part piston for an internal combustion engine has an upper piston part and a lower piston part. The upper piston part and the lower piston part each have an inner and an outer support element, which elements delimit an outer circumferential cooling channel and an inner cooling chamber, whose cooling chamber bottom has an opening. The opening is closed off with a separate closure element, which has at least one cooling oil opening.
    Type: Grant
    Filed: March 17, 2009
    Date of Patent: January 3, 2012
    Assignee: MAHLE International GmbH
    Inventors: Rainer Scharp, Reiner Mueller, Helmut Edel, Bernd Graf, Stefan Kohnle, Dieter Held, Matthias Seifried
  • Multi-part piston for an internal combustion engine
    Publication number: 20100107998
    Abstract: A multi-part piston for an internal combustion engine has an upper piston part and a lower piston part. The upper piston part and the lower piston part each have an inner and an outer support element, which elements delimit an outer circumferential cooling channel and an inner cooling chamber, whose cooling chamber bottom has an opening.
    Type: Application
    Filed: March 17, 2009
    Publication date: May 6, 2010
    Inventors: Rainer Scharp, Reiner Mueller, Helmut Edel, Bernd Graf, Stefan Kohnle, Dieter Held, Matthias Seifried