Patent ID: 8221202
Filing Date: 2012-07-17
Classification: A01F

Abstract:
1. A threshing mechanism for a combine having a supporting structure, the mechanism comprising: an elongated rotor for moving crop materials; an elongated housing for surrounding said elongated rotor and for defining a volume of space between said rotor and said housing, said housing having a transition section; said housing and said rotor mounted in said supporting structure; said rotor having a rotor tube with a constantly linear, tapered conical profile substantially throughout a threshing section of said rotor; and a plurality of threshing elements mounted on a surface of said rotor tube in the threshing section wherein all the threshing elements are located on the conical profile of the rotor tube; wherein the rotor comprises a separating section for separating crops from threshed crop materials, and the threshing section of the rotor corresponds to a threshing section of the housing and the separating section of the rotor corresponds to a separating section of the housing; and wherein the housing comprises a top that is raised above the rotor to define a first distance between the top of the threshing section of the housing and the rotor axis, and a second distance between the top of the separating section of the housing and the rotor axis, the first and second distances being unequal; and wherein the transition section is between the threshing section and the separating section of the housing, and is arranged over an outlet portion of the threshing section of the rotor and an inlet portion of the separating section of the rotor, the top of the housing being raised above the rotor at an inlet end of the transition section to define a third distance between the top of the transition section and the rotor axis, said top of the housing being raised above the rotor at an outlet end of said transition section to define a fourth distance between the top of the transition section and the rotor axis, said third distance substantially equal to said first distance and said fourth distance substantially equal to said second distance.