Patent ID: 6953168

Claim:
An indexing system for a percussive comminutor, the system comprising: a comminuting chamber, a rotor having beaters regularly spaced about a periphery of the rotor, at least one impact baffle, of which one end is pivoted and another end is movable toward or away from the rotor by operation of an adjustment jack, the baffle defining at the point of closest approach with the radial end of one of the beaters a spacing (R) which determines a given granulometry, the rotor being operatively associated with an indexing member ( 13 ) in the form of a prism, coaxial and secured in rotation with the rotor, said indexing member having a number of projecting edges equal to the number of beaters ( 3 ), an indexing jack ( 14 ) having a rod with an indexing plate ( 15 ) that is mounted on an end of the rod and that is movable into contact with a surface of the indexing member, the indexing member being positioned on the axis of the rotor such that application of the indexing plate ( 15 ) against the surface of the indexing member causes a rotation of the rotor ( 2 ) to a position in which one of the beaters is located at a position of maximum approach with the impact baffle ( 5 ), wherein approach of said baffle ( 5 ) into contact with the end of said beater ( 3 ) defines an origin of adjustment of the spacing (R) between said baffle and said beater and thus the adjustment of said spacing for the desired granulometry.