BLADE FOR ROUGH WORKS Russian patent published in 1999 - IPC

FIELD: rough working of timber or materials with the same mechanical and technical properties. SUBSTANCE: blade is used as main working organ of ax, chopper and other tools for chopping, felling, cutting. Blade includes web with cutting edge and on lateral sides of web - recesses for force engagement with worked material. Recesses have width and depth (1 -20)mm; diameter and depth equal to (1-20)mm when they are in the form of funnels. Recesses reduce friction losses between blade and worked material. EFFECT: enhanced efficiency of working. 2 cl, 4 dwg, 1 tbl