Mixing apparatus for concrete or other bulk material

An apparatus for mixing bulk material, comprising:

• a framework including a generally triangular base;
• an upwardly open mixing drum supported on said base and centered on a substantially vertical axis;
• agitator means in said drum;
• mechanism for relatively rotating said agitator means and said drum, said mechanism including main shaft means centered on said axis and provided with ancillary force-transmitting means forming part of a power train selectively actuatable for the operation of associated material-handling equipment;
• and
• drive means for rotating said main shaft means to impart relative rotation to said drum and said agitator means, said drive means including a motor secured to said framework on one side of said base, an auxiliary shaft journaled on another side of said base, a first step-down transmission linking said motor with said auxiliary shaft, and a second step-down transmission linking said auxiliary shaft with said main shaft means.