Mortar mixing drum assembly

A portable mortar mixing drum assembly comprising

• a frame carrying a hollow mixing drum having a body with an outlet opening covered by a grate and a pair of spaced end walls and a back wall spaced away from said outlet opening extending upwardly from said body,
• a shaft mounted between said end walls and carrying a pair of oppositely disposed arms each carrying a first center paddle adjacent a medial point of said shaft thereof and a second paddle for increasing the quantity of entrained air in the mortar during mixing, each said second paddle having generally linear slanted ends converging toward said shaft,
• 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 rearwardly away from said opening from the vertical by 5°-15° to inhibit build up of the mortar being mixed in said drum on said back wall, said back wall being on a back side of the assembly untended by a user.

A portable mortar mixing drum assembly comprising:

• a frame;
• a mixing drum in which said mortar is mixed, said drum being supported by said frame and having a lower, hollow substantially cylindrical body with an upper enlarged outlet opening covered by a pivotally mounted grate, a pair of spaced end walls, 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, said back wall being inclined rearwardly from a vertical plane by no more than 15° so as to inhibit accumulation of mortar;
• and
• a shaft located medially between said end walls and having a pair of oppositely disposed arms each having 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 to increase entrainment of air in said mixed mortar.