DEVICE TO PREPARE MORTARS AND CONCRETE MIXTURES Russian patent published in 2012 - IPC B28C5/22 

FIELD: construction.

SUBSTANCE: in a device to prepare mortars and concrete mixtures a drum is made from three and more strips of alternate width of convex curvilinear shape, rolled in the vertical plane in longitudinal direction bent along helical lines in transverse direction and bent along cuts, with bevelled walls in transverse-longitudinal direction arranged pairwise at the angle one to the other at both sides of strips to form broken helical lines along the drum perimetre that are directed oppositely to each other and broken helical surfaces with an alternate pitch.

EFFECT: expansion of functional capabilities.

7 dwg