Cutting tool or the like

Claim 1

A circular saw blade for use in cutting fibrous material requiring less driving force and generating less heat during operation, comprising: a generally flat disk-like main body member having a pair of parallel sides and a central bore to receive a driven shaft which causes said blade to rotate about its axis, said disk-like main body portion comprising: a plurality of radially outwardly extending lobes separate by gullets upon which cutting teeth are mounted, each of said lobes including a leading edge, facing in the direction of blade rotation, said leading edge having a first flat surface at its outer end to support a tooth and a second flat surface extending generally radially inwardly therefrom, said first flat surface lying in a first plane perpendicular to the sides of the main body at an angle to a second plane perpendicular to the sides of the main body member, containing a radius of the main body member and passing through the bottom of the lobe such that the first plane is parallel to the axis of the rotation of the blade and non-coplanar with the second plane but intersecting said second plane radially inwardly from the first flat surface, each gullet having a leading and a following end between each pair of adjacent lobes, and being of a size and shape to cause increased air flow radially outwardly across the leading edge of the following lobe and across the face of the tooth mounted thereon, each of said teeth having a conically dished cutting face of a size such that it does not cover the entire first flat surface and rearwardly extending mounting shaft, each of said teeth mounted toward the outer limits of the leading edge of the lobe within the first flat area and having the cutting face which extends radially outwardly of the first flat surface but leaves the radially inwardmost portion of the flat surface unobstructed, allowing the air to expand as it passes thereby, increasing velocity and assuring constant turbulent, cooling and cleaning airflow past the cutting face of each tooth.