Patents Assigned to Werner & Pfleiderer Corp.
  • Apparatus for removing liquids from solids
    Patent number: 5151026
    Abstract: An apparatus for extracting a liquid from a workable mass of material includes a first screw section for transporting the material, a second screw section which applies a force on the material in a direction generally opposite that of the transport direction, and a second screw extruder at or near a liquid extraction location which provides a pinch point on the material. The pinch point substantially eliminates liquid flow countercurrent to the material transport direction.
    Type: Grant
    Filed: October 31, 1990
    Date of Patent: September 29, 1992
    Assignee: Werner & Pfleiderer Corp.
    Inventors: Paul G. Andersen, Kai L. Kite-Powell
  • Mixing apparatus
    Patent number: 5143699
    Abstract: Apparatus for processing materials within a bore is disclosed to provide separation of the bore-defining elements without any relative movement between surfaces which are in engagement. Such lack of relevant movement precludes generation of frictional forces which may have catastrophic results where materials being processed are volatile or unstable such as explosives.
    Type: Grant
    Filed: July 5, 1988
    Date of Patent: September 1, 1992
    Assignee: Werner & Pfleiderer Corp.
    Inventor: Rainer Herter