Patents by Inventor Werner Waldhuter

Werner Waldhuter 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).

  • Method and apparatus for extrusion pressing of a granulated, preferably powder-metallurgic material
    Patent number: 4217140
    Abstract: A high density extruded product is continuously produced in a one step operation by first cold compressing granulated powder material in a bore into a pellet by means of a plunger reciprocable into the bore, then pushing it by the force of succeeding pellets further down the bore into a hot press zone where the pellet is sintered, and finally pushing it through an uncooled orifice into a cooling zone. The hot press zone may be heated by means of an induction heating coil. The die may be made up of a plurality of interchangable die pieces.
    Type: Grant
    Filed: June 30, 1978
    Date of Patent: August 12, 1980
    Assignee: Glacier GmbH - DEVA Werke
    Inventors: Werner Waldhuter, Klaus Lichtinghagen