Patents by Inventor Ralf J. Dahl

Ralf J. Dahl 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).

  • SCREW ELEMENT FOR USE AS A KNEADING ELEMENT IN A PLASTICIZING UNIT
    Publication number: 20090016147
    Abstract: A screw element for use as a kneading element in a plasticizing unit includes at least two kneading units which can be arranged on a common axis, for example a screw shaft. The kneading units have a geometry which is designed for attaining particularly good plasticization and reduced mechanical stress in such a way that the geometry of at least two successively arranged kneading units differs.
    Type: Application
    Filed: September 16, 2008
    Publication date: January 15, 2009
    Applicant: KraussMaffei Berstorff GmbH
    Inventors: MICHAEL BEHLING, Ralf J. Dahl