US 12,284,941 B2
Screening device with at least one suction nozzle
Philipp Topmöller, Herzebrock-Clarholz (DE); Thomas Tiggemann, Ennigerloh-Osterfelde (DE); Roger Helmut Koitzsch, Bielefeld (DE); and Norbert Vorwerk, Osnabrück (DE)
Assigned to CLAAS Selbstfahrende Erntemaschinen GmbH, Harsewinkel (DE)
Filed by CLAAS Selbstfahrende Erntemaschinen GmbH, Harsewinkel (DE)
Filed on Apr. 29, 2022, as Appl. No. 17/732,835.
Claims priority of application No. 102021111281.8 (DE), filed on Apr. 30, 2021.
Prior Publication US 2022/0346314 A1, Nov. 3, 2022
Int. Cl. A01D 41/12 (2006.01); A01D 41/02 (2006.01); B01D 46/682 (2022.01); F01P 11/12 (2006.01)
CPC A01D 41/1252 (2013.01) [A01D 41/02 (2013.01); F01P 11/12 (2013.01); B01D 46/682 (2022.01)] 19 Claims
OG exemplary drawing
 
1. A screening device for a self-propelling harvester, the screening device comprising:
a screen;
at least one suction nozzle that has an elongated hollow body with at least one suction opening which extends sectionally in a longitudinal direction and in a transverse direction of the hollow body; and
at least one air duct connecting an interior of the hollow body to a connection positioned in or on the hollow body, with the connection configured to connect to a vacuum source;
wherein the connection is positioned facing the screen of the screening device;
wherein the at least one air duct has a cross-sectional shape that increases in a vertical direction toward the connection starting from an outer end of the at least one suction nozzle; and
wherein an inner contour facing the at least one suction opening of the at least one air duct has a contour substantially corresponding to an airfoil;
wherein the inner contour of the at least one air duct comprises a first region with a sectionally convex shape that transitions into a second region with a sectionally concave shape;
wherein the first region starts from the connection; and
wherein the second region transitions into a third region with a convex shape toward the outer end of the hollow body.