CONCRETE MIXER Russian patent published in 2012 - IPC B28C5/22 

FIELD: construction.

SUBSTANCE: drum of a concrete mixer is arranged at least from one strip bent along straight lines arranged at an angle to strip edges, to form identical parallelograms arranged on a strip alternately to opposite sides, at the same time the strip is bent into cylindrical turns joined by each other along longitudinal edges, with formation of unidirectional broken helical lines along the external surface, and on the internal surface - helical broken pockets of a triangular shape, at the same time along the entire length of the drum there is a conical spring mounted, which is equipped with a device to vary a pitch of turns by means of its tension or compression, and is equipped with a pipeline with a helical nozzle for supply of hardening water for a distance L.

EFFECT: expansion of functional capabilities.

8 dwg