Transition chamber from auger to elevator in combine harvester

A clean grain conveyor for an agricultural combine comprising:

• a paddle elevator having an inlet for receiving grain;
• an auger conveyor for conveying grain to the paddle elevator;
• and
• a transition chamber having an inlet and an outlet, and positioned between the paddle elevator and the auger conveyor for the passage of grain from the auger conveyor to the paddle elevator, the transition chamber having an asymmetric longitudinal cross-section formed at least by a semicircle having a first radius of curvature, a second curve having a second radius of curvature smaller than the first radius of curvature, and a third curve having a third radius of curvature larger than the second radius of curvature.

A grain conveyor for a combine harvester comprising:

• a grain elevator having an inlet for receiving a flow of grain;
• a transition chamber connected to the grain elevator, the transition chamber including:
• an inlet having a non-circular opening, and
• an outlet in fluid communication with the transition chamber inlet and the grain elevator inlet, the transition chamber outlet having an asymmetric non-circular opening;
• and
• an auger assembly operatively connected to the transition chamber, the auger assembly including an inlet for receiving a flow of grain and an outlet in fluid communication with the transition chamber inlet.

A grain conveyor for a combine harvester comprising:

• a grain elevator that includes:
• an inlet for receiving a flow of grain,
• a return side, and
• a grain conveyor side opposite the return side;
• and
• a transition chamber connected to the grain elevator, the transition chamber including:
• an inlet, and
• an outlet having a non-circular opening in fluid communication with the transition chamber inlet and the grain elevator inlet, and
• wherein the outlet has a first side in facing engagement with the return side of the grain elevator inlet that is larger than a second side in facing engagement with the grain conveyor side of the grain elevator.