Patent ID: 7028933

Claim:
A mixing machine comprising: a generally rectangular-shaped hopper adapted to be mounted on a chassis and can be towed through conventional means, such as a tractor or a vehicle, the hopper having a plurality of side walls; rotary gear means, placed on one end of the mixing machine, for moving mixing means inside said hopper; a gateway disposed in at least one of the side walls of said hopper to discharge mixed materials; a main chamber where a rotor is placed for feeding the material to an auxiliary chamber; the auxiliary chamber adjacent to the main chamber; where a pair of upper and bottom worms are disposed, the upper and bottom worms being generally parallel and horizontal for mixing and optionally crushing materials, and for discharging materials through the discharge gateway; a materials collector chute, adjacently placed relative to the upper worm and throughout the mixing machine, wherein the upper worm includes a section, in which a plurality of discs is mounted, and which external edges thereof show exchangeable knives, where the exchangeable knives form a loop; and a counterplate proximate on the bottom of the materials collector chute, the counterplate comprising a plurality of exchangeable triangular-shape knives arranged adjacent said section of the upper worm, so when said upper worm rotates, the knives of the upper worm discs pass through said counterplate knives, grinding or crushing material passing through; and wherein the rotor includes axially spaced holders extending radially outward to support rotor arms when said rotor rotates, the rotor moves the material by feeding the bottom worm and at the same time dropping material via gravity.