Patent ID: 6468153
Filing Date: 2002-10-22
Classification: A01F

Abstract:
An agricultural combine for harvesting a crop from a field, for threshing and separating the grain contained in that crop from straw and chaff, the combine comprising:a supporting structure having ground engaging wheels which support and propel the supporting structure; an axial separating unit that extends longitudinally within the supporting structure for separating the grain contained in a harvested and threshed crop from straw; a fan located on the supporting structure and which forms an air stream; and duct work for directing the air stream to a top of the axial separator unit for blowing debris therefrom, said duct work further comprising a clear conduit having an inlet which receives generally horizontally travelling air from said fan, and an outlet which directs said air generally vertically downwardly, the duct having a neck portion proximate to and above the outlet, said neck portion establishing a restriction to flow of air within the conduit for hindering air from swirling upwardly proximate the neck.