US Patent 7682067 Mixing systems and related mixers

A mixing system includes a housing and a motor mount disposed on the housing and having a passage extending therethrough. A dive motor is coupled with the motor mount for selectively rotating the motor mount relative to the housing. A rotational assembly includes a hub having a passageway extending therethrough and a casing at least partially encircling the hub, the hub being rotatable to the casing. The rotational assembly is removably coupled to the housing so that the passageway of the hub aligns with the passage of the motor mount.