Mill for grinding garbage or the like

Mill for processing material such as garbage comprising, in combination:

• a housing defining a grinding chamber having an inlet opening and an outlet opening;
• a plurality of substantially planar shelves secured in the housing and dividing the grinding chamber into sections, with each of the planar shelves including a centrally located aperture having a size;
• a shaft rotatably mounted in the grinding chamber and concentrically within the centrally located apertures of the planar shelves;
• a plurality of grinding rotors rotatably fixed to the shaft and located complementary to and intermediate the inlet opening and the plurality of planar shelves, with each of the rotors comprising a planar disc of a size smaller than the centrally located aperture of the planar shelf and a plurality of planar arms rotationally fixed to and extending radially from the planar disc and circumferentially spaced from each other, with the radial extent of the planar arms extending past the centrally located apertures of the planar shelf and over the planar shelf so that the material passing beyond the radial extent of the planar arms passes between the radial extent of the planar arms and the housing and between the planar arms and the planar shelves before passing through the centrally located apertures of the planar shelves, with the planar disc and planar arms being parallel to the planar shelf;
• wherein the arms of the grinding rotors have free ends;
• and wherein the radial spacing of the free ends of the arms of the grinding rotors from the grinding chamber decrease from the grinding rotor adjacent to the inlet opening to the grinding rotor adjacent the outlet opening.

Mill for processing material such as garbage comprising, in combination:

• a grinding chamber having an inlet opening and an outlet opening;
• a plurality of planar shelves secured in the grinding chamber and dividing the grinding chamber into sections, with each of the planar shelves including a centrally located aperture having a size;
• a shaft rotatably mounted in the grinding chamber and concentrically within the centrally located apertures of the planar shelves;
• a plurality of grinding rotors rotatably fixed to the shaft and located complementary to and intermediate the inlet opening and the plurality of planar shelves, with each of the rotors comprising a planar disc of a size smaller than the centrally located aperture of the planar shelf and a plurality of planar arms extending radially from the planar disc and circumferentially spaced from each other, with the planar disc and planar arm being parallel to the planar shelf;
• and means on the grinding rotors for pushing the material radially outwardly of the planar disc of the grinding rotors.

Mill for grinding material such as garbage comprising, in combination:

• a grinding chamber having an inlet opening and an outlet opening;
• a plurality of horizontal shelves secured in the grinding chamber and dividing the grinding chamber into sections, with each of the shelves including a centrally located aperture having a size;
• a vertical shaft rotatably mounted in the grinding chamber and concentrically within the centrally located apertures of the shelves;
• a plurality of grinding rotors rotably fixed to the shaft and located completely to the plurality of shelves, and means located on the grinding rotors radially within the centrally located apertures of the shelves for creating a downward movement of air for enhancing the movement of light weight ground material past the grinding rotor and through the centrally located aperture of the shelf through the mill.

Mill for grinding material such as garbage comprising, in combination:

• a grinding chamber having an inlet opening and an outlet opening;
• a plurality of shelves secured in the grinding chamber and dividing the grinding chamber into sections, with each of the shelves including a centrally located aperture having a size;
• a shaft rotatably mounted in the grinding chamber and concentrically within the centrally located apertures of the shelves;
• and a plurality of grinding rotors rotatably fixed to the shaft and located complementary to and intermediate the inlet opening and the plurality of shelves, with each of the rotors comprising a disc of a size smaller than the centrally located aperture of the shelf and a plurality of arms extending radially from the disc and circumferentially spaced from each other, with the radial extent of the planar arms extending past the centrally located apertures of the planar shelf and over the shelf, with the arms of the grinding rotors having free ends;
• the shelf decreases from the grinding rotor adjacent to the inlet opening to the grinding rotor adjacent the outlet opening.