Patent ID: 8540037

Claim:
A tip for use in a high impact, wear resistant tool, the tip comprising: a substrate having a base end and a non-planar interface spaced apart from said base end; and a superhard material bonded to said non-planar interface and having a distal end with an apex spaced apart from said non-planar interface, said superhard material having a thickness of at least 0.100 inches, and said superhard material having a plurality of diamond layers including: a first diamond layer adjacent to said non-planer interface, said first diamond layer having a first catalyzing material concentration; a second diamond layer disposed at said distal end of said superhard material, said second diamond layer having a second catalyzing material concentration, said first catalyzing material concentration being greater than said second catalyzing concentration; and a third diamond layer disposed between said first diamond layer and said second diamond layer, said third diamond layer having a third catalyzing material concentration less than said first catalyzing material concentration and greater than said second catalyzing material concentration; wherein at least one of said first diamond layer, said second diamond layer, and said third diamond layer has an inverted cone geometry, where the inverted cone geometry is inverted with respect to the apex of the superhard material and having a center of curvature distal to said at least one layer.