GRINDING APPARATUS Russian patent published in 1995 - IPC

FIELD: grain-type materials grinding. SUBSTANCE: apparatus has grinding chamber with operational unit made in the form of arc-shaped bent helical spiral with placed in its cavity flexible elastic member. Rollers are fixed to elastic member so, as to be capable to rotate in respect to spiral. Roller has toroidal surface with radius of concave part curvature, that is equal to the smallest radius of spiral curl. Rollers are mounted in relation to axis eccentrically or shifted relatively to each other. EFFECT: grinding apparatus is used for grain-type materials grinding. 2 cl, 2 dwg