Patent ID: 7967502

Claim:
A vertical mixer assembly for mixing a bulk material, comprising: a floor having an upper surface; at least one wall extending from the floor and having an interior surface and an upper edge; the floor and the at least one wall defining an open topped mixing chamber having a general tub-shape suitable for receiving the bulk material; at least one vertical auger positioned in the mixing chamber for mixing the bulk material, the auger having a flight suitable for mixing the bulk material upon operation of the auger; an opening in the mixing chamber for allowing egress of the bulk material, the opening having a wall portion and a floor portion; and a door assembly comprising: a side door upwardly slideable on rails between a closed position covering the wall portion of the opening and an open position exposing the wall portion of the opening; and a floor section pivotably attached to the floor and pivotable between a closed position covering the floor portion of the opening and an open position exposing the floor portion of the opening; the floor section separate from the side door.