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US 6,267,542 B1Granted
Drill bit having a chiseless bit tip
OwnerAvraham Salmoninventor
Life of this patent
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Abstract
A drill bit for drilling a bore is disclosed. The drill bit includes a body having a shank portion, a tip portion and an axis of rotation therethrough. The tip portion has a plurality of touching points, wherein all of the plurality of touching points form a plurality of cutting edges that are aligned along the entire length of a common diameter line. Alternately, the plurality of cutting edges may be aligned along the entire length of a diameter of the drill bit on different diameter lines.
Claims8
A drill bit for drilling a bore, comprising:
- a body having a shank portion, a tip portion and an axis of rotation therethrough;
- said tip portion having a plurality of touching points wherein all of said plurality of touching points form a plurality of cutting edges with associated rake angles, said plurality of cutting edges include an inner first pair of cutting edges defining a first cutting edge and a second cutting edge and an intermediate second pair of cutting edges defining a third cutting edge and a fourth cutting edge wherein the first cutting edge, the second cutting edge, the third cutting edge and the fourth cutting are aligned along the entire length of a common diameter line;
- and
- the plurality of cutting edges further including an outer third pair of cutting edges defining a fifth cutting edge and a sixth cutting edge, the fifth cutting edge and the sixth cutting edge being parallel.
1 more element
Dependencies are inferred from the claim text.