Combine harvester
AssigneeSperry Corporation
InventorFrans J. G. C. De Coene
Life of this patent
Estimating the term…
Abstract
A harvesting machine with crop threshing and separating means; the crop threshing and separating means comprising a separator rotor rotatably mounted in a generally cylindrical separator housing and operable to move crop material across the inside of said housing. The separator housing is formed in part by a separator concave for the separation of grain therethrough, and in part by an impervious cover rearwardly of the separator concave as seen in the direction of rotation of the separator rotor. The concave and the impervious cover have adjacent edges which are spaced apart over a short distance, thus defining an opening therebetween and downstream of the separator concave.
Claims12
A combine harvester with crop threshing and separating means, the crop threshing and separating means comprising:
- a rotor means rotatably mounted in a generally cylindrical housing and operable to move crop material across the inside of said housing;
- the cylindrical housing being formed in part by a pervious concave means for the separation of threshed crop material therethrough and in part by an impervious section rearwardly of the pervious concave means as seen in the direction of rotation of the rotor means;
- the pervious concave means and impervious section having adjacent edges spaced apart, thus defining an opening therebetween downstream of the pervious concave means;
- the pervious concave means comprise a plurality of spaced apart bars which extend generally transversely of the direction of rotation of the rotor means and a plurality of transversely spaced apart arcuate concave wires which extend generally in the direction of rotation of the rotor means;
- the concave bars and concave wires together defining meshes for separation of threshed crop material therethrough;
- a rear portion of the pervious concave means, as seen in the direction of rotation of the rotor means, is void of any transverse concave bars;
- the rear portion of the pervious concave means which is void of any transverse concave bars, comprises a plurality of transversely spaced concave wire sections which extend generally in the direction of rotation of the rotor means and which thus define open ended elongate apertures therebetween facing generally in the direction of rotation of said rotor means;
- crop material is caused to move in a spiral path on the inside of the generally cylindrical housing and wherein the concave wire sections in the rear portion of the pervious concave means which is void of any concave bars are inclined generally in the direction of said spiral path;
- and
- at least one spiral fin is provided on the inside of the generally cylindrical housing for causing crop material to move in said spiral path, the at least one spiral fin extending across the pervious concave means, the impervious section of the generally cylindrical housing and across the opening therebetween.
Dependencies are inferred from the claim text.