Self Sharpening Grinder Tooth - Ellison, Curtis
7. A wood grinding device comprising: a rotating drum; a plurality of teeth attached to the drum, each tooth comprising: a base; a tip formed on the base using an alloy including steel and tungsten carbide. 8. The tooth of claim 7 wherein the tip is in the shape of a cross. 9. The tooth of claim 8 wherein the cross is helical. 10.