Patent ID: 8235583

Claim:
A mixing blade ( 6 ) attachable to a rotatable shaft, the shaft having a center-axis, said mixing blade comprising a base part ( 15 ) fixable to the shaft and a removable wearing element ( 12 ), said base part having a base part length, characterized in that the wearing element ( 12 ) and the base part ( 15 ) overlap over at least 30% of the base part length, wherein the mixing blade is rectangular in a top view parallel to the center-axis of the shaft, wherein the base part has a rectangular recess in which the wearing element is inserted, wherein the wearing element has a wearing element length perpendicular to the center-axis of the shaft, and a majority of the wearing element length has a cross section in the shape of a right trapezoid, the cross section being perpendicular to the wearing element length and having an area, and wherein the wearing element has a transition area in which the area of the cross section increases towards the shaft along the wearing element length.