Patents by Inventor Ralf Davids

Ralf Davids 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).

  • Screw-type processing plant with elongation and expansion compensation devices
    Patent number: 7547132
    Abstract: A material processing plant consists of a first screw-type machine and a second screw-type machine: The screw-type machines are connected to each other by means of a pipe elbow. An elongation compensation device is disposed between the first screw-type machine and the pipe elbow. An expansion compensation device for thermal expansion of the second screw-type machine is disposed inside the last column of the first screw-type machine which is arranged upstream of the pipe elbow.
    Type: Grant
    Filed: November 2, 2007
    Date of Patent: June 16, 2009
    Assignee: Coperion GmbH
    Inventors: Ralf Davids, Carsten Koberg, Raimund Schleicher, Ralf Riehle
  • MATERIAL PROCESSING PLANT
    Publication number: 20080124420
    Abstract: A material processing plant consists of a first screw-type machine and a second screw-type machine: The screw-type machines are connected to each other by means of a pipe elbow. An elongation compensation device is disposed between the first screw-type machine and the pipe elbow. An expansion compensation device for thermal expansion of the second screw-type machine is disposed inside the last column of the first screw-type machine which is arranged upstream of the pipe elbow.
    Type: Application
    Filed: November 2, 2007
    Publication date: May 29, 2008
    Inventors: Ralf Davids, Carsten Koberg, Raimund Schleicher, Ralf Riehle
  • Power distribution gearing for double helix extruders
    Patent number: 4297917
    Abstract: A driving gear assembly for a double helix extruder. The assembly includes a multiple power path from a transmission gear to produce synchronism in the extruder helix shafts. The structure of the gearing enables a simple adjustment of the proper mesh of the extruder helices when mounting the gearing by mere disengagement and re-engagement of a (normally not disengageable) tooth coupling.
    Type: Grant
    Filed: September 18, 1979
    Date of Patent: November 3, 1981
    Assignees: Werner & Pfleiderer, Zahnraderfabrik Renk Aktiengesellschaft
    Inventors: Erwin Bauer, Ralf Davids, Gerhard Gotz, Hilmar Jussen, Heinrich Arndt, Louis Kummel, Rudolf Morhart, Erich Pollak-Banda