The instant device consists of a circular top plate made of ALMAG 35 aluminum and magnesium alloy material with a centerhole and three through holes near its rim and 120 DEG apart from one another into which three cylindrically shaped pins have been tightly pressed. Three identical beveled metallic blades with rounded holes in them are swivably received one each by the pins. A circular bottom plate also made of such ALMAG 35 material has a centerhole and three broken holes for receipt of the bottoms of the pins when the device is fully assembled plate to plate and held with a bolt and nut from below the bottom plate via the centerholes and adapter means to the rotatory head of a motorized brush cutting unit. A centrally located elevation upward in the bottom plate co-extensive with two convex ridges on its top surface fits into a centrally positioned cylindrical well in the bottom side of the top plate co-extensive with two concave depressions in the wall of the well as the depressions concomitantly receive the ridges thereby sandwiching the blades and pins during completed assembly of the invention to the rotatory head. A left handed nut serves to secure the fully assembled invention intact and the nut is self tightening during counterclockwise head rotation.
展开▼
