A rotor and cage assembly includes a skeleton of curved spaced-apart side members affixed to laterally extending upper and lower spaced-apart members therebetween and surrounding the rotor. One of the curved spaced-apart side members is terminated with curved fingers. Three concave inserts insert laterally into the skeleton spanning 270 around the rotor. One of the concave inserts carries straight fingers that interlace between the skeleton side member curved fingers. A control assembly of plates having arcuate slots placed at 3 of the pivots of the skeleton assembly, 3 control bars connected to the skeleton pivots, and an actuator is connected separately to each control bar at one end effect arcuate rotation of the control bars resulting in the synchronized rotation of the arcuate slotted plates so that the interlaced straight fingers move closer together or farther apart with the fixed skeleton assembly curved fingers for different types of grain.

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.

An adjustable vane system for use with a rotor cage of a threshing system of an agricultural harvester includes a vane. The vane includes: a generally helically curved inner profile; a surface being an outer profile that is opposite the inner profile and is generally helically curved over a portion of the vane, the outer profile being configured to be positioned closer to the rotor cage than the inner profile; and a flat portion located midway along the outer profile.

A concave adjustment device for an agricultural harvester includes a rotor having a longitudinal axis, a concave encircling at least a portion of the rotor, and a linkage connected to the concave for moving the concave with respect to the rotor. The linkage includes a first link, a second link and the concave. The first link has a first portion connected to a device for moving the linkage and a second portion connected to one side of the concave. The second link has a first portion pivotably connected to an opposing side of the concave and a second portion pivotably connected to a fixed point on the harvester. The device for moving the linkage is configured to translate the first link, which causes rotation of the second link and movement of the concave with respect to the rotor.

An adjustable vane system for use with a rotor cage of a threshing system of an agricultural harvester includes a vane. The vane includes: a generally helically curved inner profile; a surface being an outer profile that is opposite the inner profile and is generally helically curved over a portion of the vane, the outer profile being configured to be positioned closer to the rotor cage than the inner profile; and a flat portion located midway along the outer profile.

A concave section for a harvester is provided. The concave section 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 harvesting machine that has a first rotor rotationally coupled to a chassis, a second rotor rotationally coupled to the chassis, and a spine separating the first rotor from the second rotor. Wherein the spine has threshing inserts coupled thereto to facilitate threshing of crop processed by the first and second rotors.

A spine for providing structural support for a dual rotor harvesting machine, the spine having a first surface that is solid and directed towards a first rotor configured to rotate about a first axis and a second surface that is solid and directed towards a second rotor configured to rotate about a second axis. The spine also having at least one threshing insert positioned directly on the first surface and extending longitudinally along the first axis of the spine and at least one threshing insert positioned directly on the second surface and extending longitudinally along the second axis of the spine.

An arrangement for switching over a combine harvester between swath deposit operation and wide distribution operation comprises a front element and a rear element which follows downstream. The rear element may be attached in an articulated fashion, in an inherently rigid fashion, at its upstream end about a first pivoting axis and may be moved between a swath deposit position and a wide distribution position by an adjustment drive. The front element may be attached in an articulated fashion at its upstream end about a second pivoting axis, may be inherently rigid and may also be coupled to the adjustment drive.

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.