Patent ID: 7624825

Claim:
A cutter element for a drill bit comprising: a base having a base axis; a cutting surface extending from said base, said cutting surface having a trailing section and a leading section, said leading section comprising a top surface, a front surface, and a crest formed at the intersection of said top surface and said front surface; wherein said crest includes first and second ends and a forward-most portion that is farther from said trailing section than said first and second ends and is farther from said base portion than said first and second ends; wherein said crest has a radius of curvature measured between said top surface and said front surface, the radius of curvature of the crest being non-uniform along said crest between said first and second ends; wherein the radius of curvature of said crest is smallest at said forward-most portion; wherein said trailing section includes a partial dome-shaped surface; and wherein said trailing section includes a relieved surface at a position between said dome-shaped surface and said base.