Patents by Inventor Walter Rapetski

Walter Rapetski 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).

  • Four wing, non-intermeshing rotors for synchronous drive to provide improved dispersive and distributive mixing in internal batch mixers
    Patent number: 6494607
    Abstract: Four wing rotors for used in an internal batch mixer. The rotor has two long wings, and these two long wings have different approach angles and helix angles. The rotor has two short wings and these short wings also preferably have different helix angles and approach angles. The rotors provide improved distributive and dispersive mixing allowing for greater productivity in processing materials and producing more homogeneously mixed materials at lower discharge temperatures.
    Type: Grant
    Filed: May 4, 2001
    Date of Patent: December 17, 2002
    Assignee: Farrel Corporation
    Inventors: Lefteris Valsamis, Frank Borzenski, Robert Wagner, Walter Rapetski, Hans Baurmeister
  • Four wing, non-intermeshing rotors for synchronous drive to provide improved dispersive and distributive mixing in internal batch mixers
    Publication number: 20020163852
    Abstract: Four wing rotors for used in an internal batch mixer. The rotor has two long wings, and these two long wings have different approach angles and helix angles. The rotor has two short wings and these short wings also preferably have different helix angles and approach angles. The rotors provide improved distributive and dispersive mixing allowing for greater productivity in processing materials and producing more homogeneously mixed materials at lower discharge temperatures.
    Type: Application
    Filed: May 4, 2001
    Publication date: November 7, 2002
    Inventors: Lefteris Valsamis, Frank Borzenski, Robert Wagner, Walter Rapetski, Hans Baurmeister