Patent ID: 7216682

Claim:
The combination of a split wheel to be mounted on a shaft of a tree stump grinder, the wheel comprising a first half and a second half joined to one another along the diametric surfaces thereof, each half having an axially positioned semicircular cut-out corresponding to the diameter of the stump grinder shaft, and means for removably joining the two halves together comprising a pair of clamping means, a plurality of recesses in the periphery of the wheel, each recess having a front edge, a bottom edge, and a back edge, a slot radially inwardly of each recess near the front edge thereof, and a nut plate in the slot having a threaded hole, the back edge being undercut to conform to the trailing surface of a cutter block, each recess containing a removable cutter block, the cutter block having a top surface with a radius of curvature corresponding to that of the wheel, a bottom surface that is co-planar with the bottom of the recess, two parallel side surfaces, a leading surface and a trailing surface, the trailing surface corresponding to the rear surface of the recess, and a least one hole to receive a removable cutting tooth, the hole extending from the top surface or a side surface of the block at an angle of inclination from the said surface toward the back surface of a block, the threaded fastener comprising a bolt adapted to be threaded into a nut plate positioned within the slot in the recess of the cutting wheel.