Patent ID: 6729814
Filing Date: 2004-05-04
Classification: B23B,Y10T

Abstract:
In combination, a cutter bit and a rotary cutter tool, the combination comprising:a motor a chuck rotatably mounted on the motor; the chuck defining a hole that extends through the center of the chuck, the hole having a length; a cutter bit having a body with a first end and a second end, the body having a first diameter and having a cross sectional configuration complimentary to the hole; a first cutter knife mounted on the first end of the body and a second cutter knife mounted on the second end of the body; the first and second cutter knives having a second diameter that is smaller than the first diameter of the body; and the first and second cutter knives being dissimilar in configuration to each other; wherein a portion of the body and one of the first and second cutter knives is positioned within the hole during motor operations; the body further having an integrally formed annular boss extending outwardly from the body at a position intermediate the first and second cutter knives and the distance from each cutter knife to the boss has a length that is less than the length of the hole in the chuck; and the boss includes a lower annular flange and an upper annular flange spaced from the lower annular flange, and a concave area extends between the upper and lower annular flanges.