Patent ID: 8679124

Claim:
A reamer, which comprises: a) a base comprising a wall having an outer base surface providing a perimeter extending from a lower base surface defining an imaginary base plane upwardly to an upper base surface, wherein the base is provided with at least two bayonet slots spaced about the perimeter and extending inwardly into a thickness thereof from the outer base surface, the base having an interface for mating with a holder; b) a hemispherical-shaped cutting dome extending from an apex to a lower edge comprising a lower edge inner surface, the dome being rotatable about a longitudinal axis that is perpendicular to a theoretical equatorial plane of the hemisphere and that passes through the apex of the dome, wherein the dome has an outer surface presenting multiple cutting sites comprising apertures suitable for passing debris into a cavity defined by an inner surface of the dome where the debris may accumulate, and wherein there are at, least two tabs formed from the dome and extending inwardly into the cavity of the dome, the tabs beig generally parallel to the theoretical equatorial plane, and c) wherein the lower edge inner surface of the dome contacts the outer base surface with one of the dome tabs received in one of the base bayonet slots to thereby connect the dome to the base.