BLADE Russian patent published in 2003 - IPC

FIELD: public utilities. SUBSTANCE: blade placed on surface to be cleaned at angle relative to direction of movement has conical face surface of variable curvature in cross section. Shape of blade in cross section, from lower edge to upper edge, is formed by in series conjugated section of first straight line 5, first arc 6 and second are 7, and section of second straight line 8. Radius of second arc of circumference 7 is constant, from one extreme cross section to the other. Length of section of second straight line 8 and radius of first arc 6 of circumference increase from minimum to maximum value from one extreme cross section to the other. EFFECT: increased snow throwing distance. 2 cl, 4 dwg