Machine for distributing seed, fertilizer and other grain or powder masses

Claim 1

Improvement in a machine for distributing feed, fertilizer and other grain or powder masses comprising a container for the mass to be distributed having an outlet opening in its lower end, a downwardly depending outlet passage connected at its upper end to the outlet opening from said container, a centrifugal fan located at the lower end of said outlet passage, a first shaft in alignment with said outlet passage, said centrifugal fan mounted on said first shaft for rotation therewith, a second shaft positioned within said first shaft and independently rotatable thereof, an impeller located within said outlet passage between the outlet opening from said container and said centrifugal fan and said impeller mounted on said second shaft for rotation therewith, a disc mounted on and extending transversely of said second shaft and located at the lower end of said outlet passage, said disc extending radially outwardly from said outlet passage and separating said outlet passage from said centrifugal fan, a plurality of outwardly directed vanes positioned on the side of said disc facing the lower end of said outlet passage, said disc and vanes arranged to rotate with said impeller, a helical channel located within said impeller and terminating at its lower end at said disc for directing the material from said container to said vanes on said disc and the radially outer edges of said vanes being aligned above the radially outer edges of said centrifugal fan for uniformly directing the material into the path of said centrifugal fan at its radially outer edge, and adjustable means located at the inlet end of said helical channel for adjusting the inlet opening to said helical channel for determining the mass of material conveyed to said vanes on said disc for revolution of said impeller.