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AssigneeCNH America LLC
InventorsFrank R. G. Duquesne, Marc R. M. Jonckheere, Christiaan A. C. Lippens, Dirk Desnijder, Thierry E. G. Devriese
Estimating the term…
A concave arrangement is disclosed for a threshing machine such as a combine harvester 10. The arrangement includes a concave 30 having a moveable rear portion 48 that is adapted to vary the break-over angle presented to straw passing downstream. A flap member 54 is provided that moves jointly with the moveable rear portion 48 and ensures that a gap G between the moveable portion 48 and a later processing stage such as a beater apparatus is kept substantially closed. Variation of the break-over angle influences the length of the straw leaving the threshing machine and the loading of the further separation and cleaning mechanisms.
concave arrangement for a threshing machine, the arrangement comprising a first stage having a concave associated with a rotary member, said concave having a hinged portion that is positioned in an exit region of said concave and is pivotally moveable between a first position and a second position so as to vary in se the distance between said hinged portion and said rotary member, said concave arrangement further comprising a second stage downstream of and spaced apart from said first stage and adapted to receive material processed in use in said first stage and said arrangement further including a bridging means for bridging a gap between said first and second stages, said bridging means being pivotally moveable jointly with said hinged portion such that said bridging means substantially closes said gap in and between each of at least said first and second positions of said hinged portion, wherein said hinged portion and said bridging means are connected together and jointly moveable by means of an over-centre mechanism.
A concave arrangement for a combine harvester, the arrangement comprising a first stage having a concave associated with a rotary member, said concave having a hinged portion that is positioned in an exit region of said concave and is pivotally moveable between a first position and a second position so as to vary in se the distance between said hinged portion and said rotary member, said concave arrangement further comprising a second stage downstream of and spaced apart from said first stage and adapted to receive material processed in use in said first stage and said arrangement further including a bridging means for bridging a gap between said first and second stages, said bridging means being pivotally moveable jointly with said hinged portion such that said bridging means substantially closes said gap in and between each of at least said first and second positions of said hinged portion, wherein said hinged portion and said bridging means are connected together and jointly moveable by means of an over-centre mechanism.
A method of processing gathered material using a concave arrangement comprising a first stage having a concave associated with a rotary member, the method including varying with a rearwardly disposed hinged portion of said concave break-over angle presented to material between said first stage and a second stage and varying said break-over angle by moving said hinged portion jointly with a hinged bridging means via an over-centre mechanism in such a manner that said hinged bridging means substantially closes a gap between said first and second stages in a plurality of positions of said hinged concave portion.
Dependencies are inferred from the claim text.