A threshing concave for an agricultural combine for harvesting different types of crops is disclosed. The concave has a curved frame comprising two curved end members extending between two side members, a plurality of threshing bars, each threshing bar extending between the two curved end members, and a plurality of threshing plates, each threshing plate extending between the two curved end members.

A concave section for a harvester includes a concave body having an upstream side, a downstream side, a leading end and a trailing end. The concave body defines an arcuate crop engagement face facing radially inwardly. A plurality of crop passage openings are defined through the arcuate crop engagement face. A cover is configured to at least partially cover at least some of the crop passage openings. The cover is carried by the concave body and is movable thereon between at least two different positions to adjust a degree of openness of at least some of the crop passage openings.

A concave section for a harvester includes a concave body having an upstream side, a downstream side, a leading end and a trailing end. The concave body defines an arcuate crop engagement face facing radially inwardly. A plurality of crop passage openings are defined through the arcuate crop engagement face. A cover is configured to at least partially cover at least some of the crop passage openings. The cover is carried by the concave body and is movable thereon between at least two different positions to adjust a degree of openness of at least some of the crop passage openings.

A universal threshing concave for an agricultural combine for harvesting different types of crops is disclosed. The threshing concave comprises a frame with a pair of opposite side members and opposite end members. The invention further comprises an array of threshing bars angled and notched along their longitudinal extent, and hexagonal in cross-section. Each bar is seated in openings in the end members of said frame.

A universal threshing concave for an agricultural combine for harvesting different types of crops is disclosed. The threshing concave comprises a frame with a pair of opposite side members and opposite end members. The invention further comprises an array of threshing bars angled and notched along their longitudinal extent, and hexagonal in cross-section. Each bar is seated in openings in the end members of said frame.

A combine harvester including a frame and two axial-flow crop processing rotors mounted to the frame. An inner support structure is located between the two rotors and is mounted to the frame by a first linkage. Two outer support structures are located outboard of the two rotors and are mounted to the frame by respective second and third linkages. The inner support structure and two outer support structures carry first and second pluralities of concave grate segments at a radial distance from the respective rotors. A concave adjustment system includes a first actuator coupled to the first linkage which is configured to raise and lower the inner support structure. A second actuator is coupled to one of the second and third linkages and is configured to raise and lower at least one of the two outer support structures.

A combine harvester including a frame and two axial-flow crop processing rotors mounted to the frame. An inner support structure is located between the two rotors and is mounted to the frame by a first linkage. Two outer support structures are located outboard of the two rotors and are mounted to the frame by respective second and third linkages. The inner support structure and two outer support structures carry first and second pluralities of concave grate segments at a radial distance from the respective rotors. A concave adjustment system includes a first actuator coupled to the first linkage which is configured to raise and lower the inner support structure. A second actuator is coupled to one of the second and third linkages and is configured to raise and lower at least one of the two outer support structures.

A threshing apparatus 1 includes a threshing unit 41 that has a receiving net 23 and threshes crops, and a sorting unit 42 that is provided below the threshing unit 41 and sorts grain from a threshed product that has leaked from the receiving net 23. The sorting unit 42 includes a sorter 24 that sorts grain as a sorted product from the threshed product, a first product collector 26 that collects the sorted product as a first product, a second product collector 27 that collects, as a second product, the threshed product that was not sorted as the sorted product, a second product returner 32 that returns the second product collected by the second product collector 27 to the sorter 24, and a return amount detector 71 that detects the return amount of the second product to be returned to the sorter 24.

A containment panel liner for use with a containment panel of a threshing assembly of a farm combine is provided. The containment panel liner includes an inner surface and an outer surface opposing the inner surface. A first major edge connects the inner and outer surfaces. A second major edge opposes the first major edge and connects the inner and outer surfaces. A first minor edge connects the first major edge to the second major edge and connects the inner and outer surfaces. A second minor edge opposes the first minor edge and connects the first major edge to the second major edge and connects the inner and outer surfaces. Taken together, the inner and outer surfaces form an arcuate cross-sectional shape that approximates an arcuate cross-sectional shape of a containment panel.

A threshing system for use in an agricultural harvester. The threshing system includes a rotor and a perforated concave system. The rotor has a rotational axis. The perforated concave system is spaced radially outwardly from the rotor for passage of grain through perforations as the rotor moves crop material across the concave system. The concave system has at least one concave section having a rigid frame, pivotal members, and an arcuate movable member. The rigid frame has a plurality of sides rigidly coupled together. The pivotal members are pivotally coupled and extend to two of the sides of the rigid frame. The arcuate movable member interacts with the plurality of pivotal members to pivot each of the pivotal members as the arcuate movable member is moved along a segment of an arc generally about the rotational axis.