Overlapping insert for cutting tooth

A saw tooth for a circular saw blade comprising:

• a tooth body of frusto-pyramidal configuration, the tooth body having a cutting end, a mounting end, and four flat sides extending therebetween and forming four corners at the cutting end;
• a flat seating surface on the cutting end at each of the corners, each flat seating surface sloping inwardly and being defined between two edges diverging from a corresponding corner;
• and
• a substantially triangular, hardened insert fastened to each seating surface, forming a cutting tip with a pair of receding cutting edges;
• and
• each seating surface defining a seat notch at one of the two diverging edges near the intersection with an adjacent divergent edge and each of the inserts including an insert-notch defined in the insert at one of the cutting edges adapted to be aligned with the corresponding seat notch when the insert is installed on the seating surface, the seat-notch and the insert-notch in combination forming a groove for receiving a section of an adjacent insert to permit overlapping of adjacent inserts, thereby providing angled cutting edges about the periphery of the cutting end.

A saw tooth for a circular saw blade comprising:

• a multi-faceted shaped body having a mounting end, and a larger cutting end and a plurality of sides extending between the mounting end and the cutting end, the sides forming corners at the cutting end where they meet;
• a seating surface on the cutting end at each of the corners, each seating surface sloping inwardly and defined between two edges diverging from a corresponding corner;
• each diverging edge intersecting an adjacent diverging edge from adjacent another corner so as to form substantially v-shaped edges co-terminus with each side,
• a hardened insert having a flat bottom surface, flat side surfaces and a top surface, the insert being fastened to each seating surface, forming a single cutting tip with a pair of receding cutting edges defined by the intersection of the side surfaces and the top surface, each cutting edge terminating at a side end;
• and
• each of the inserts including a single insert-notch defined in the insert at one side end while the other side end of the insert is in the form of a side tip formed by the intersection of two side surfaces such that when the inserts are installed on the seating surface, the insert-notch forms a groove for receiving the side tip of an adjacent insert so that adjacent inserts overlap one another and provide angled cutting edges about the periphery of the cutting end.