US Patent 11851296 Self-rotating grain spreader for a grain bin

A grain bin has a top opening with a hopper for receiving grain that is directed downwardly to a spreader supported for rotation by a vertical shaft. The spreader has an elongated inclined chute having a V-shape cross-section. The chute has a center portion having an opening with a trap door pivoted or controlled from a mechanism operable from the top opening of the bin. A deflector is positioned under the trap door opening and rotates the chute in response to the flow of grain through the opening. The chute has an extension that also supports a pivotal deflector.