Abstract: A track for mills including a series of inner wearing segments and a series of outer wearing segments with a high resistance to wear. The upper surface of the inner wearing segments and the outer wearing segments provide two concentric circular runway paths moving beneath milling rollers in order to mill material tipped out onto the track. The inner and outer wearing segments are fixed removably to a sole with an outer edge and an inner edge defining a housing for the wearing segments.

Abstract: There is disclosed a grinding crusher having a grinder piece disposed within a crushing chamber for relative rotation with respect to a casing defining the crushing chamber. The casing is journaled and driven in high speed rotation so as to cause a material within the casing to be centrifugally pressed against the inner peripheral surfaces thereof.

Abstract: The invention relates to a tubular mill for grinding natural and synthetic raw materials, in particular for the cement industry, comprising a horizontally-disposed rotary cylindrical drum, characterized by comprising one or more fixed grinding rollers disposed radially within the drum and supported by a fixed shaft which extends along the axis of rotation, each of said rollers being idle and able to rotate by friction within an annular guide rigid with the inner wall of the drum.

Abstract: An improvement is presented in an apparatus for processing soil for planting wherein a separator are provided for initially separating rocks and other large objects from soil prior to crushing thereof, the separator comprising a plurality of respectively upwardly and downwardly directed pins which cooperate in the removal of said rocks and other large objects from the soil. Also provided is a vertical rotatable power driven shaft centrally located in said apparatus wherein a plurality of radially extending arms are fixed thereto and are rotatable with the shaft. Some of said separating pins are fixed to the arms and some cooperating separating pins are fixed to a disc plate also mounted about said power driven shaft. A rotating plurality of discs crush said soil to reduce large particles and destroy weed seeds, insects, and larvae.