Patent ID: 6272962
Filing Date: 2001-08-14
Classification: B26D,H05K,Y10T

Abstract:
A cutting blade comprising:a shank portion; anda cutting portion having a predetermined length and opposed sides, said cutting portion affixed to said shank portion and comprising:a cutting edge portion having a predetermined length and opposed sides;a continuous portion which continuously extends from said cutting edge portion to said shank portion, wherein blade thickness gradually increases in a direction towards said shank portion;at least one pair of opposed concave curved surfaces substantially symmetrical to each other with respect to a centerline, the centerline being substantially orthogonal to the length of said cutting portion, each said opposed concave surface extending axially in a direction substantially parallel to said length of said cutting portion and present on at least one of said cutting edge portion and said continuous portion;a plurality of arcuate surfaces provided on at least one of said opposed sides of said cutting edge portion and said opposed concave curved surfaces, each arcuate surface of said plurality of arcuate surfaces extending along said continuous portion in a direction substantially orthogonal to said length of said cutting portion.