Patents by Inventor Heinrich Fehrmann

Heinrich Fehrmann 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).

  • Centering device for shaping tools of extrusion presses
    Patent number: 4368026
    Abstract: The present disclosure is directed to a centering device for shaping tools for extrusion presses, wherein an outer mandrel together with an inner mandrel define a through gap for plastic extrusion material which device has a plurality of centering members supported on the outer mandrel which are distributed over the periphery of a radial plane and which are adjustable in the radial direction and which are constructed in the form of push rods guided for radial displacement. Each push rod (6,106) has associated therewith an individually adjustable drive, an adjustable lever (7,107) supported for pivoting on the outer mandrel and which are actuable by means of a tightening device (8,108) and form a transmission gear for applying the tightening force.
    Type: Grant
    Filed: January 19, 1981
    Date of Patent: January 11, 1983
    Assignee: Wavin B.V.
    Inventors: Eduard J. Budel, Heinrich Fehrmann, Johan de Kok