Patent ID: 6074297
Filing Date: 2000-06-13
Classification: A01F

Abstract:
In a combine, an arrangement for separating grain from the leafy portion of a plant comprising:a rotating cylinder having a plurality of raspbars disposed in a spaced manner about its periphery and displaced in a circular path;a rotating beater disposed aft of and above said cylinder; anda grate-like concave having a lower leading intake edge and an upper trailing discharge edge respectively disposed directly below said cylinder and said beater and subtending a generally circular arc between said edges, wherein said concave is disposed in closely spaced, parallel relation to said rotating cylinder, said concave including a plurality of cross bars disposed in a spaced manner between said leading intake and trailing discharge edges and extending the length of said concave, wherein said cross bars are arranged so as to form an increasingly smaller gap between said cylinder and said concave in proceeding from the leading intake edge to the trailing discharge edge of said concave to facilitate separation of grain from the leafy portion of a plant, wherein each pair of adjacent cross bars defines an aperture therebetween and wherein the aperture between adjacent cross bars decreases in width in proceeding from the leading intake edge to the trailing discharge edge of said concave.