Patents by Inventor Roger Hülsmann

Roger Hülsmann 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 for a solid-bowl centrifuge and a method of extracting oil using the centrifuge
    Patent number: 6908423
    Abstract: A screw for a solid-bowl screw-type centrifuge, comprising: a screw body having a circumference, a cylindrical section and a conical section; at least one screw blade surrounding the screw body several times and forming several screw spirals; a delivery path for conveying material to be centrifuged formed between the screw spirals; blade segments arranged in the delivery path between adjacent screw spirals only in a portion of the cylindrical section; and recesses in the at least one screw blade, the recesses constructed only in a portion of the cylindrical section and constructed such that the material to be centrifuged can flow through between adjacent screw spirals. A method for extracting oil in a two- and three-phase separation process using the screw of the present invention.
    Type: Grant
    Filed: October 18, 2001
    Date of Patent: June 21, 2005
    Assignee: Westfalia Separator AG
    Inventors: Steffen Hruschka, Roger Hülsmann