Patent ID: 8651791

Claim:
A door assembly in combination with an agricultural storage bin including a circular bin floor, a cylindrical bin wall extending upwardly from the bin floor, and a door opening in the cylindrical bin wall having an upper portion and a lower portion, the door assembly comprising: an exterior chute arranged to communicate with only the lower portion of the door opening, the exterior chute including a bottom wall arranged to extend outwardly at an upward inclination from a bottom edge of the door opening and a pair of side walls arranged to span from respective sides of the bottom wall to the bin wall at a location spaced below a top end of the door opening adjacent the lower portion of the door opening; an inner door panel supported on the bin wall so as to be operable between a closed position spanning only the upper portion of the door opening which extends between the top end of the door opening and the lower portion of the door opening and an open position in which both the upper portion and the lower portion of the door opening are substantially unobstructed by the inner door panel; the bottom end of the inner door panel terminating at a location spaced above the bottom end of the door opening in the closed position such that the lower portion of the door opening remains in communication between an interior of the bin and the exterior chute in the closed position of the inner door panel; and a cover member arranged to be supported on the exterior chute so as to be operable between a closed position spanning an open top end of the exterior chute between the side walls and an open position in which the open top end of the exterior chute is substantially unobstructed by the cover member.