Brush and tree cutter blade

A generally circular cutter blade for the cutting of brush and trees or the like, the improvement for such a cutter blade, comprising:

• a substantially triangular first mounting plate suitably mounted to and cooperating with a rotatable shaft, second mounting plates suitably hinged along each of the three straight edges of said triangular first mounting plate for pivoting relative to the first mounting plate about respective hinged axes, substantially rectangular cages, means to mount each of said cages to each of said second mounting plates, each of said cages having a first and second end, said first end being removably secured to one of said second mounting plates, said second end having a substantially rectangular opening, a substantially rectangular cutter tooth slidably mounted in each of said cages with its cutting edge protruding from said cage through said substantially rectangular opening of said second end of said cage, retaining means on one distal end of said cutter tooth to capture and hold said rectangular tooth in said cage in a position substantially parallel to the respective mounting plate, a spring, said spring being contained by said cage, one end of said spring engaging said first removably secured end of said cage while the other end of said spring engages said retaining means of said cutter tooth, whereby said cutter tooth is urged by said spring to extend outward from said cage and from the respective second mounting plate, limiting means to limit the amount of pivotal movement of said mounting plates relative to said triangular first mounting plate;
• said rotatable shaft, said triangular first mounting plate, said second mounting plates, said cages, said teeth, said springs and said limiting means cooperating together, whereby, when said shaft is rotated, said cutter teeth when engaging an obstacle can deflect inwardly, upwardly and downwardly.