Patent ID: 9662717
Date: 2017-05-30
CPC Classifications: B23B,B23P,Y10T

Claim:
1. A drill bit comprising: an elongate body having a tool end and a work end with a cutting tip formed thereat; a first linear portion and a second linear portion that are each formed on the cutting tip and intersect one another proximate a centerline of the elongate body, each linear portion extending laterally across the cutting tip and pitched toward the tool end of the elongate body at a first rate as each respective linear portion extends in an outward radial direction from the centerline; a groove portion formed in the work end of the elongate body on each opposite lateral side of the cutting tip that is radially outboard of an adjacent one of the first linear portion and the second linear portion, each groove portion including at least one groove that extends laterally across the work end of the elongate body such that a depth of the at least one groove in a direction aligned with the centerline of the elongate body reduces as the at least one groove extends across the work end in a rotational direction away from and beyond a leading edge of the cutting tip of the elongate body, and being pitched in a radial direction toward the tool end of the elongate body at a second rate that is greater than the first rate and terminating short of a circumferential radius of the elongate body, each groove portion forming a continuous tangential shape associated with the leading edge that extends an entire length of the cutting tip on each opposite side of the centerline such that each radially extending portion associated with the work end has a similar shape.