Patents by Inventor Franz Mayrhofer

Franz Mayrhofer 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).

  • Apparatus for the extrusion of plastic pipes or profiles
    Patent number: 6280172
    Abstract: The present invention relates to an apparatus for the extrusion of plastic profiles with an extruder having an extruder flange, an extrusion die with a die flange through which the extrusion die is detachably connectable with the extruder flange, a fastening element with the two halves which is arranged to embrace the extruder flange and the die flange, a tensioning element in order to press the two halves of the fastening element against the flanges. An improved function is achieved in such a way that the two halves of the fastening element are fastened swivelably on the extruder and that they are mechanically coupled in order to perform an oppositely directed swiveling movement.
    Type: Grant
    Filed: September 28, 1999
    Date of Patent: August 28, 2001
    Assignee: Technoplast Kunststofftechnik GmbH
    Inventors: Meinhard Schwaiger, Franz Mayrhofer