Patent ID: 7549957

Claim:
A screw-type solid-bowl centrifuge comprising, a rotatable drum including a tapering portion and a cylindrical portion; a rotatable screw having a screw body; at least one main screw blade surrounding the screw body and forming a plurality of screw flights, the plurality of screw flights forming a conveying path configured to transport a material to be processed in the centrifuge; two blade segments being arranged in the conveying path in portions of the plurality of screw flights; the at least one main screw blade being provided in a region of the blade segments that includes clearances configured to allow a throughflow of the material to be processed to flow between adjacent screw flights of the plurality of screw flights; the two blade segments being further arranged in only a first and a second of the plurality of screw flights; wherein a first of the two blade segments in the first screw flight lying nearer the tapering portion than the second screw flight, the first of the two blade segments being configured to be turned forward in relation to the at least one main screw blade; and a second of the two blade segments in the second screw flight located in a direction axially further away from the tapering portion than the first screw flight is formed in a plane substantially parallel to a plane of the at least one main screw blade.