Indeed it doesn't, traditionally (it's mentioned the article) it's simply a flow of air that throws the hulls away from the grains. Perhaps the handle is hooke

Indeed it doesn't, traditionally (it's mentioned the article) it's simply a flow of air that throws the hulls away from the grains. Perhaps the handle is hooked up to a fan at a high RPM to generate this airflow? I think I saw a little desk fan in one of the images ...