Abstract: This invention relates to an apparatus for comminuting rock and other material and, in particular, to a rotary driven blade apparatus which comminutes rock, drilling materials and other material by impact rather than by grinding or crushing. More particularly, the invention creates a comminution environment which maximizes the establishment of a clear trajectory for the material between the orbit of each spinning blade and a single breaker bar.

Abstract: A modularly tiered clear-trajectory impact commuter apparatus that comminutes rock, drilling materials and other comminutable by impact rather than by grinding or crushing. The invention creates a comminution environment which maximizes the establishment of a clear essentially tangential trajectory for the material between the orbit of each spinning blade and a single rectangular breaker bar. The modular vertical series coupling of the modularly tiered clear-trajectory impact comminuter apparatus may be adjusted to accommodate the material throughput for any environment whereby, for any given size of comminution chamber and rotary blade configuration, any number of tierable, modular comminution chambers may be vertically tiered for achieving the desired material throughput in relation to the load of comminutable material.