Drill bit
OwnerRalph C. Maysinventor
Life of this patent
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Abstract
A high speed drill bit is formed of a longitudinal body designed to rotate about a longitudinal axis. Each flute has a leading edge with a positive rake angle and a trailing edge with a neutral or negative rake angle. The bit cutting face is formed by surfaces and cutting edges that are asymmetrical with respect to each other.
Claims4
A drill bit having a longitudinal body having a rotational axis, with a cutting tip at one end and an opposite shank end, wherein said body has at least one asymmetrical spiral flute formed on the exterior surface thereof, the spiral flute extending from said cutting tip towards said shank end, the spiral flute defined in a cross-section perpendicular to said rotational axis by a leading edge having a positive rake angle and a trailing edge having a negative rake angle, and at said cutting tip, a cutting edge that is asymmetrical with respect to said bit body rotational axis.
Dependencies are inferred from the claim text.