Patent ID: 7681509

Claim:
A material dispensing device for dispersing material into the ground, comprising: an elongated shaft having a hollow interior region; a receptacle disposed adjacent one end of the shaft for holding material, the receptacle being in communication with the hollow interior region of the shaft such that the material or a liquid-material mixture dissolved from at least a portion of the material can flow from the receptacle into the shaft; a helical flange secured to the shaft, the helical flange comprising a single-lead thread having a root and a crest, the single-lead thread being wrapped around the shaft and having a hollow inner region between the root and the crest which is in communication with the hollow interior region of the shaft; one or more openings formed in the shaft or helical flange for dispersing the material or the liquid-material mixture into the ground; and wherein the shaft and helical flange are configured such that rotation of the shaft and flange causes the material dispensing device to be driven into the ground.