Quiet running circular saw blade

A circular saw blade of the type comprising tooth tip inserts secured at circumferentially spaced intervals to the peripheral portion of a disc-like body that has axially oppositely facing side surfaces, each of said inserts having a front face which faces in a forward substantially circumferentially direction and a radially outer face which meets its front face at a sharp cutting edge, each insert having a width to project sidewardly beyond a side surface of the body and to extend across at least a substantial part of the thickness of the body, and said body having a gullet for each insert, the major portion of which is circumferentially forward of the front face of the insert and which extends a substantial distance radially inwardly from said cutting edge on the insert, said saw blade being characterized by:

• A. the blade having a near-circular periphery, to the extent that the greatest departures from a uniform peripheral radius are at the front faces of the inserts;
• B. each gullet being defined by a cavity in said side surface of the body that extends to the periphery of the body and a distance radially inwardly therefrom and has its greatest depth at the periphery of the body;
• and
• C. the depth of each cavity at its radially innermost portion being taperingly diminished radially inwardly and circumferentially rearwardly.

In a circular saw blade of the type having a disc-like body with opposite substantially flat side surfaces and having teeth on the peripheral portion of the body at circumferentially spaced intervals around the same, each of said teeth having a front face that faces in a forward circumferential direction and extends across at least a major portion of the thickness of the body and having a radially outer face which meets its front face at a cutting edge, and said body having a gullet for each of said teeth, the major portion of said gullet being circumferentially forward of said front face and said gullet extending a substantial distance radially inwardly from said cutting edge:

• A. means for minimizing noise producing turbulence due to air flow through the gullets from one side of the body to the other, said means comprising a wall portion fixed to the body but substantially thinner than the remainder of the body, extending edgewise circumferentially across at least a major portion of each gullet and having a radially outer edge beyond which said front face of the rearwardly adjacent tooth projects radially, so that such projections constitute the major departures from circularity of the body periphery;
• and
• B. each gullet being substantially beveled at its circumferentially rearmost and radially innermost portions so that said portions of the gullet merge into a flat side surface of the body and facilitate flow of chips out of the gullet in a rearward and radially inward direction.