Patent ID: 6691596
Filing Date: 2004-02-17
Classification: B23D,B28D,Y10T

Abstract:
A rotary saw blade for use in cutting fiber cement board material, said blade comprising:a generally circular main body plate having opposed planar surfaces and a central opening with respect to its axis of rotation; a plurality of cutting teeth disposed about the periphery of said plate, said teeth being within said planes of the planar surfaces, each of said teeth having a radially outermost cutting edge; a plurality of peaked shoulders distributed about the periphery of said plate in front of each of said cutting teeth, said peaked shoulders being within said planes of said planar surfaces, each of said shoulders being at least partially defined by a forwardly sloping portion, a peak, and a rearwardly sloping portion, said rearwardly sloping portion having a length at least twice the length of said fowardly sloping portion, said peaks of said shoulders having a radial extension less than that of said cutting edges of said teeth, wherein said peaked shoulders act as a guide for said cutting teeth by limiting the depth of penetration of each of said cutting teeth; each cutting tooth and should defining a section, each section being spaced about the circumference of said main body plate and being spaced apart from each other section by a smooth sloping arcuate section; a plurality of hook-shaped gullets distributed about the periphery of said plate between said shoulders and said cutting teeth, each of said gullets being at least partially defined by said rearwardly sloping portion of an adjacent shoulder and an arcuate portion having a partially circular shape; and a plurality of tooth support portions extending between the rear of each tooth to said forwardly sloping portion of said shoulders.