Dethatcher

Abstract

Broadly speaking, the invention comprises harrow apparatus for dethatchers. The harrow apparatus each has a plurality of pairs of harrow teeth formed of single steel rod with the ends of the rod forming a pair of teeth and with a pair coiled portion between the teeth and a projecting portion projecting away from the coiled portion and teeth with the teeth acting to engage the ground for cutting into the ground. A dampening coil also formed of a single steel rod has a pair of hooked ends and a pair of coiled portions intermediate the hooked ends and with a projecting portion projecting away from the coiled portions and the pair of hooked ends. The invention also includes a power drum for supporting and power rotating the pairs of harrow teeth and coiled portions. The power drum has a center tube with a plurality of slots for receiving the projecting intermediate portions of the pair of teeth and of the dampening coil. The coils of the pairs of harrow teeth are mounted to the drum to be spring baised in one direction and the dampening coils are mounted to the drum and harrow teeth spring biased in a lesser degree to urge the harrow teeth in the opposite direction and are hooked over the pair of teeth of the harrow device so that when the teeth engage the ground and are flexed rearward as a result of the engagement the coiled of the dampening member being biased on the opposite direction act to dampen or slow the otherwise sudden reactive spring return of the teeth by the teeth coil to thereby prevent damage to the harrow teeth.