Patent ID: 7300342

Claim:
A polishing wheel comprising: a body defining a central longitudinal axis and a central passage coaxial with the longitudinal axis, the body mountable to a rotating polishing tool; the body having a lower polishing surface defining a planar portion; wherein the lower polishing surface includes a plurality of main radial flutes extending from the central passage to an outer edge of the lower polishing surface, which defines a maximum diameter of the lower polishing surface to define an open fluid flow path from the central passage to the outer edge; wherein secondary radial flutes are provided in the lower polishing surface extending from the outer edge and terminating in an area before the central passage, and further wherein the secondary radial flutes are not in direct flow communication with the main radial flutes; wherein the main radial flutes have a reduced profile exit passage radially inward and adjacent to the outer edge, relative to a main portion of the main radial flutes disposed radially inwardly between the central passage and the exit passage, wherein the exit passages having a smaller cross-sectional area than the main portion of the main radial flutes.