Drill bit
OwnerLaverne R. Durfeeinventor
Life of this patent
Estimating the term…
Abstract
A drill bit comprises a shank defining a longitudinal axis. A cutting head is formed at one end of the shank. At least one cutting edge and a centering point are formed on the cutting head. The shank and a portion of the cutting head are formed of a first material. The cutting edge, centering point and a portion of the cutting head are formed of a second material. A weld joins the first material and the second material. A first blank is welded to a second blank. A cutting head is milled into the first blank and second blank such that the cutting head is formed of the first material and the second material.
Claims18
A drill bit comprising
- a shank defining a longitudinal axis;
- a cutting head formed at one end of the shank;
- at least one cutting edge and a centering point formed on the cutting head;
- said shank and a portion of the cutting head formed of a first material;
- said cutting edge, centering point and a portion of the cutting head formed of a second material;
- a weld connecting said first material and said second material.
A method making a drill bit comprising:
- providing a first blank of a first material;
- providing a second blank of a second material;
- welding the first blank to the second blank;
- and
- milling a cutting head into the first blank and second blank such that the cutting head is formed of the first material and the second material.
Dependencies are inferred from the claim text.