Patents by Inventor Andreas Helfenbein

Andreas Helfenbein 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).

  • Flat gasket with calendered sieve layer
    Patent number: 9518659
    Abstract: The present invention relates to a flat gasket with filter elements. In order to fulfill the increased requirements with respect to cleanliness, there is an increased demand for the integration of filter elements in flat gaskets. The corresponding filter elements mainly serve for picking of impurities accrued during production as well as other residues circulate via the operational fluids, especially during the initial period of operation of an internal combustion engine or a vehicle.
    Type: Grant
    Filed: April 5, 2012
    Date of Patent: December 13, 2016
    Assignee: Reinz-Dichtungs-GmbH
    Inventors: Georg Egloff, Oliver Claus, Hans Waldvogel, Andreas Helfenbein, Robert Blersch