Patents by Inventor Rainer Viessmann

Rainer Viessmann 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).

  • Double screw extruder
    Patent number: 8998481
    Abstract: What is described is a twin screw extruder having two extruder screws (10, 34), each extruder screw (10) having a cylindrical core (12) and at least one web (14) running helically over the periphery of the outer cylinder face of the core (12), the surface of the web (14) comprising a peripheral side (18) and two flanks (22, 24), and a channel (30) being formed between adjacent web windings. The flanks (22, 24) of the web (14) have a waved progression in the peripheral direction.
    Type: Grant
    Filed: August 16, 2012
    Date of Patent: April 7, 2015
    Assignee: Hans Weber Maschinenfabrik GmbH
    Inventor: Rainer Viessmann
  • DOUBLE SCREW EXTRUDER
    Publication number: 20140050042
    Abstract: What is described is a twin screw extruder having two extruder screws (10, 34), each extruder screw (10) having a cylindrical core (12) and at least one web (14) running helically over the periphery of the outer cylinder face of the core (12), the surface of the web (14) comprising a peripheral side (18) and two flanks (22, 24), and a channel (30) being formed between adjacent web windings. The flanks (22, 24) of the web (14) have a waved progression in the peripheral direction.
    Type: Application
    Filed: August 16, 2012
    Publication date: February 20, 2014
    Applicant: Hans Weber Maschinenfabrik GmbH
    Inventor: Rainer Viessmann