MILL Russian patent published in 2021 - IPC B02C7/00 

FIELD: food industry; agriculture.

SUBSTANCE: invention is intended for grinding a product, including in the food and agricultural fields. A mill is proposed, containing upper and lower millstones with grooves and drives for rotational movement around a vertical axis. Oppositely directed spiral grooves are made on surfaces of millstones rotating in opposite directions. In the central part of the lower millstone, a spherical protrusion is made, placed in a spherical cavity of the upper millstone, and axes of rotation of millstones are mounted with an offset relatively to each other with the possibility of shifting millstones in their planes and changing the size of a gap between surfaces of the protrusion and the cavity simultaneously in several radial directions. The upper millstone consists of two parts – the central and peripheral, interconnected by radial guides, on which flexible elements are mounted, attached with their ends to both parts, wherein the outer diameter of the central part is less than the inner diameter of the peripheral part.

EFFECT: device allows one to increase the efficiency of the grinding process.

1 cl, 4 dwg