Patent ID: 7419422

Claim:
A rotatable cutting head for use with a cutting machine for stripping or finishing stone and concrete surfaces comprising: a plurality of cutting disks each with at least one slot having opposed generally radially extending surfaces of different length and a generally elliptical outer surface, the longer of said radial surfaces having a generally “L” shaped notch in an upper edge; said disks being arranged along a longitudinal axis in side-by-side positions with said slots being radially positioned about said axis forming said cutting head with a helically shaped groove along its length; generally rectangular shaped composite cutting elements having a first surface formed of poly-crystal diamond and a second surface formed of tungsten carbide and poly-crystal diamond secured in each said notch by brazing and presenting a first face formed of said poly-crystal diamond extending generally parallel of said longer radial surface forming a cutting surface and a second face formed of said poly-crystal diamond and said tungsten carbide directed outwardly; each said disk including a central opening for mounting with a support shaft and at least one bore spaced from said central opening in varying circumferential positions about said axis, said bores acting to radially position said disk about said shaft forming said helically shaped groove; wherein rotation of said cutting head sequentially brings said poly-crystal diamond faces into and out of engagement with a work surface being ground.