Portable cement-mixing apparatus having upper and lower notched plates affixed to a shaft

Apparatus for mixing cement comprising an engine, a shaft having two ends, the engine being connected to the shaft at one end thereof for rotation of the shaft, a plurality of paddles arranged about the shaft near the other end of the shaft, said paddles extending outwardly from the shaft and comprising two notched plates affixed to the shaft, each of said notched plates having two ends one of said plates being an upper plate on said shaft and having vanes at each end of the plate bent toward the other lower plate at a bend line, the other lower plate having vanes at each end of the plate bent toward the upper plate at a bend line, each said vane having a trailing edge section bent with respect to each said vane for providing a pushing force and said vanes being arranged such that the ends of said vanes are disposed at a radial distance from the shaft which is substantially greater than a radial distance of the bend lines from the shaft thereby forming between the vanes and the shaft a substantially open volume to enable passage of coarse material and to channel flow around the shaft.