Patents by Inventor Arnold Schwippe

Arnold Schwippe 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 of controlling mandrel in a tube-extruding press
    Patent number: 8011219
    Abstract: The invention relates to a method for adjusting the position of a mandrel (10), which is situated in a hydraulic punch consisting of a cylinder and a ram that form a mandrel cylinder (8), in an extrusion press for producing pipes (2), which are extruded from blocks (4) that are loaded into a receiving device (5) situated upstream of the extrusion press (3) and are punched using the mandrel (10). The invention is characterised in that the mandrel cylinder (8) is driven directly by pumps (11), which are set for a pre-calculated throughput that is dependent on the press speed, and that an additional throughput is added to the pre-calculated pump throughput. To adjust the position of the mandrel (10), a control valve (16) that acts on the ring side (12) of the mandrel (8) is connected to a tank (17).
    Type: Grant
    Filed: January 14, 2005
    Date of Patent: September 6, 2011
    Assignee: SMS Eumuco GmbH
    Inventors: Ewald Hagen, Arnold Schwippe, Andreas Wershofen
  • Method for Controlling the Position of a Mandrel of an Extrusion Press for Producing Tubular Workpieces
    Publication number: 20080245125
    Abstract: The invention relates to a method for adjusting the position of a mandrel (10), which is situated in a hydraulic punch consisting of a cylinder and a ram that form a mandrel cylinder (8), in an extrusion press for producing pipes (2), which are extruded from blocks (4) that are loaded into a receiving device (5) situated upstream of the extrusion press (3) and are punched using the mandrel (10). The invention is characterised in that the mandrel cylinder (8) is driven directly by pumps (11), which are set for a pre-calculated throughput that is dependent on the press speed, and that an additional throughput is added to the pre-calculated pump throughput. To adjust the position of the mandrel (10), a control valve (16) that acts on the ring side (12) of the mandrel (8) is connected to a tank (17).
    Type: Application
    Filed: January 14, 2005
    Publication date: October 9, 2008
    Inventors: Ewald Hagen, Arnold Schwippe, Andreas Wershofen