Patent ID: 7559687

Claim:
A portable mortar mixing drum assembly comprising a frame, a mixing drum having a lower hollow substantially cylindrical body with an upper enlarged outlet opening covered by a pivotally mounted grate, said drum including a pair of spaced end walls and a laterally disposed discharge chute extending from said outlet opening and a back wall spaced away from said chute and integral with and extending upwardly from said body, a shaft mounted medially between said end walls and carrying a pair of oppositely disposed arms each carrying a center paddle and a mixing paddle, said arms being medially located on said shaft, each of said mixing paddles including a radially outermost edge and a radially innermost edge joined at each of two opposite end portions of said mixing paddles by a generally linear surface, said generally linear surfaces of said opposite end portions being angled toward each other and toward said shaft for increasing air entrained in the mortar during mixing of the mortar, an engine mounted on said frame operatively connected to said shaft for rotating said shaft, starter operating controls located closely adjacent a rearward portion of said engine for the safe operation thereof, and said back wall of said body being inclined from the vertical by no more than 15° to inhibit build up of the mortar being mixed in said drum.