Patent ID: 7131606
Filing Date: 2006-11-07
Classification: B02C

Abstract:
1. A blade for a comminution machine, comprising: at least one tooth having an attack face facing in a direction so as to confront materials to be comminuted when said blade is rotated about a rotary axis of said blade, said attack face including a bursting point which protrudes from said attack face for breaking mineral materials; said attack face being positioned at an outer surface of said blade and facing in the direction of rotation of said blade; a receding surface which extends from said attack face in a direction directed inwardly from a tangent line, said receding surface having shear edges radially inward of said tooth for shearing shearable materials; wherein said receding surface extends for at least 30 degrees in front of said attack face; and wherein said receding surface extends inwardly for a distance which is at least equal to the radial dimension of said attack face.