Abstract: The invention relates to the mechanical fragmentation of solid bodies. The breaker-crusher mill has hammers pivoted on rotors arranged under a grid enveloping a part of their periphery. The heads of the hammers pass through the bars of the grid and the tangential speeds of the rotors at their opposite points are directed upwards. The mill may be used as a grinder (tires, compressed materials, etc.) or as a crusher (cast iron, steel, etc.).

Abstract: A double-acting press for precision deep-stamping requiring a plurality of passes comprises two tool assemblies arranged coaxially facing one another. The first tool assembly is constituted by a hollow stem double-acting hydraulic stamping jack, the head of which contains a cascade of annular dies, one for each pass required, of internal size decreasing from the first pass die situated at the free end of the head. The first pass die bears on its front leading surface the male blank-cutting punch and the spacing of the leading surfaces of two successive dies is at least equal to the height of the blank after its passage through the first of said two dies. A second hydraulic jack, called a central jack whose body is fast to and coaxial with that of the stamping jack has its stem passing coaxially through the hollow stem and the head of the latter.

Abstract: A rotary comminuting apparatus adjustable to reduce either hard or soft materials includes a segmented perforated semi-cylindrical grate partially surrounding the lower portion of the rotor. The grate segments are pivotally supported on a common axle parallel to the axis of the rotor. The opposite ends of the segments are each supported by a hydraulic jack and the jacks have a common connection to a motor pump unit to pivot the grates from a lower position concentric with the rotor to an upper position in which the outer edge is closer to the rotor surface than the pivot edge.