MIXING SCREW AND GRINDING SCREW Russian patent published in 2013 - IPC A01F29/00 B01F7/00 A01K5/00 

FIELD: agriculture.

SUBSTANCE: screw, preferably for grinding and mixing trucks, comprises a rotating shaft (20) with the axis H and at least one blade (12) which includes the part fixed on the rotating shaft (20) with a free end part fixed to it. The fixed part is located in a plane that is tilted relative to the plane perpendicular to the axis H of the said shaft (20). The fixed part has a first cutting edge, and the end part has a second cutting edge. The first cutting edge of the fixed part and the second cutting edge of the end part of at least one blade (12) lie on the same cylindrical surface. The free end part of at least one blade (12) is inclined with respect to the fixed part. The free end part of at least one blade (12) has a slope of -5° to 5° with respect to the plane located at right angle to the axis H.

EFFECT: increased service life of the auger and increased speed of its rotation.

10 cl, 7 dwg