CRUSHER Russian patent published in 2011 - IPC B02C15/16 

FIELD: process engineering.

SUBSTANCE: invention relates to crushing of materials. Proposed crusher comprises housing with cylindrical crushing chamber, material feed and crushed material discharge openings arranged at housing top and bottom, respectively. Bottom opening has screen and face covers closing crushing chamber on both sides. Crushing chamber houses drive and driven working tools with crushing teeth that make toothed gear. Drive working element is arranged coaxially in said cylindrical crushing chamber while drive working element is fitted off-center on the shaft at chamber bottom part. Drive working element represents a gear with external teeth. Gear shaft runs in two bearings, while drive working tool represents a hollow cylinder with openings running is roller bearings arranged in pairs on both sides of the cylinder, and has internal gearing teeth formed by lateral surfaces of adjacent openings made regularly along cylinder edges.

EFFECT: higher efficiency of crushing.

4 cl, 3 dwg