Weed seed destruction for a combine harvester with a transfer member across a rear edge of the combine sieve

Abstract

Weed seeds are destroyed in the chaff from a combine harvester by repeated high speed impacts caused by a rotor which accelerates the discarded seeds in a direction centrifugally away from the rotor onto a stator including stator surfaces around the axis. Thus the discarded seeds rebound back and forth between the rotor and the stator to provide a plurality of impacts. A transfer auger at the rear edge of the combine sieve carries the weed seeds outwardly to respective weed seed destructors driven by the shaft of the transfer auger. The seeds are discharged radially through a discharge opening, where the angle of the discharge around the rotor axis can be changed to direct the seeds towards the guide fins of the tailboard of the chopper, or into the housing of the straw chopper.