MIXER TRUCK Russian patent published in 2003 - IPC

FIELD: construction; devices for preparing concrete mixes. SUBSTANCE: proposed mixer truck consists of base chassis and mixing drum mounted on chassis for rotation. Pear- like mixing drum has bottom plate and conical part adjoining the bottom plate and connected with cylindrical part by its larger base, second conical part connected with cylindrical neck accommodating spiral members forming screw line. Spiral members in normal section have additional bending at angle not less than 140^o. Bending of segments of screw line from drum neck to its cylindrical part is pointed inside drum. Bending of segments of screw line in conical part adjoining the bottom plate is pointed towards neck. EFFECT: increased efficiency of mixer handling stiff concrete mixes. 2 cl, 4 dwg