Patent ID: 8025248

Claim:
A turbine for a comminuting machine, the turbine comprising: a backing plate; a plurality of turbine blades joined to said backing plate and extending upright from said backing plate, said turbine blades joining together at a central axis; each of said turbine blades including a leading edge slanted at an angle; said leading edge of each of said turbine blades further including a plurality of through-holes; each of said leading edges being joined to a blade foil, said blade foil having a concave front surface and a curved back surface; each of said blade foils having through-holes for aligning with said through-holes of said leading edges; said blade foils including an overlapping section for matably overlapping with said leading edges in a flush manner; fastening means for joining said leading edges to said blade foils, said fastening means insertable into said through-holes of said leading edges and said through-holes of said blade foils; and a conical vent chamber penetrating said blade foil, said vent chamber having an inlet and an outlet wherein said inlet and outlet are of different diameters.