Patent ID: 8602336

Claim:
A wood chipper that contains a rotatable disc having a vertically aligned front and rear faces with at least one radially extended chip slot that passes through said disc and wherein said chipper includes: a knife holder having a body with a top wall surface, a flat bottom wall surface and at least one side wall surface that is generally perpendicular to said bottom wall surface; means for securing said bottom wall surface of said knife holder body against the front face of said disc with said one side wall surface running radially along an adjacent edge of said chip slot; a chipper knife mounted within a knife seat contained within said knife holder body; a clamp having a contact area located at one end that abuts against said chipper knife; a connector extending between said clamp and said knife holder body that contains a spherical joint; and a series of threaded fasteners that pass through clearance holes located within said clamp and are threaded into said knife holder such that when said threaded fasteners are torque down loads acting upon said chipper knife along axes other than those that are perpendicular to or parallel with the bottom wall surface of said knife holder are concentrated along the axes of said threaded fasteners.