Patents by Inventor Klaus Lichtinghagen

Klaus Lichtinghagen 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 continuous extrusion of electrically conductive granulated materials, preferably powder metallurgy materials
    Patent number: 4420294
    Abstract: Apparatus for the continuous extrusion of electrically conductive granulated materials, preferably powder metallurgy materials, wherein the material is introduced into a duct of a die and is compressed and moved along the duct to and through a nozzle on the die by a punch movable in the duct, the material being sintered by heating it with electrical current passed therethrough via electrical connections made with the punch and nozzle.
    Type: Grant
    Filed: November 20, 1981
    Date of Patent: December 13, 1983
    Assignee: Glacier GmbH-DEVA Werke
    Inventor: Klaus Lichtinghagen
  • Apparatus for the continuous extrusion of electrically conductive granulated materials, preferably powder metallurgy materials
    Patent number: 4380473
    Abstract: A process for the continuous extrusion of electrically conductive granulated materials, preferably powder metallurgy mateials, wherein the material is introduced into a duct of a die and is compressed and moved along the duct to and through a nozzle on the die by a punch movable in the duct, the material being sintered by heating it with electrical current passed therethrough via electrical connections made with the punch and nozzle.
    Type: Grant
    Filed: January 24, 1980
    Date of Patent: April 19, 1983
    Assignee: Glacier GmbH-DEVA Werke
    Inventor: Klaus Lichtinghagen
  • 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