Patent ID: 8807248

Claim:
A hard insert for use with a roof drill bit, the hard insert comprising: a first side and a second side opposing and generally parallel to the first side, the first and second sides extending in a longitudinal dimension of the hard insert, and further including opposing first and second ends that each extend between the first and second sides; a top upper surface having a first inclined upper surface adjacent the first end and a second inclined upper surface adjacent the second end that are both positioned between the first and second sides, wherein the first inclined upper surface has an inner end spaced apart from the first end and the second inclined upper surface has an inner end spaced apart from the second end a first webbed notch and a second webbed notch structured and arranged on the top upper surface of the hard insert for removing drilling debris from the top upper surface of the hard insert during a drilling operation a cutting surface having a first cutting surface extending to the first end and being adjacent to the first inclined upper surface, a second cutting surface extending to the second end and being adjacent to the second inclined upper surface and a concave central cutting surface extending between the first webbed notch and the second webbed notch; and wherein the first webbed notch extends between the inner end of the first inclined upper surface and the second cutting surface and the second webbed notch extends between the inner end of the second inclined upper surface and the first cutting surface.