Patent ID: 6893150
Filing Date: 2005-05-17
Classification: B01F,B08B,B28C

Abstract:
1. A concrete delivery truck, comprising: a) a chassis; b) a mixing drum rotatably associated with the chassis, the mixing drum having an interior cavity defining an interior surface and a central axis of rotation extending between a closed end and an open end; c) a helical flight extending along the interior surface of the mixing drum for delivering concrete to the open end of the drum, the helical flight having opposed side surfaces and opposed radially inner and radially outer ends, the radially outer end of the helical flight combining with the interior surface of the cavity so as to define opposed radially outer convergence zones adjacent the opposed side surfaces of the helical flight; and, d) means disposed within at least one of the opposed radially outer convergence zones for preventing the accumulation of concrete therein.