Patent ID: 7798258

Claim:
A cutter element for a drill bit comprising: a base portion having a diameter and a central axis; a cutting portion extending from the base portion and defining an extension height; wherein the cutting portion includes a first pair of flanking surfaces that taper towards one another to form a first elongate chisel crest, and a second pair of flanking surfaces that taper towards one another to form a second elongate chisel crest that crosses the first elongate chisel crest in top view; wherein the first elongate chisel crest extends along a first crest median line from a first crest end to a second crest end; wherein the first pair of flanking surfaces includes a first flanking surface and a second flanking surface that is directly opposed to the first flanking surface across the first crest median line proximal the first crest end; wherein the first elongate chisel crest defines a first crest tangent angle in front profile view; and wherein the first crest tangent angle at 10% of the diameter measured radially from the central axis on the first elongate chisel crest in profile view is greater than 75° and less than or equal to 90°.