A threshing system for an agricultural harvester includes a rotor and a substantially cylindrical cage that surrounds at least a portion of the rotor. The threshing system also features a material flow adjustor for controlling axial movement of material through the cage. The material flow adjustor is movably mounted adjacent to a threshing space and includes at least one material conveying edge that enters the threshing space. The material flow adjustor is moveable between a first operative position, in which the at least one material conveying edge is spaced from the rotor in a radial direction by a first distance, and a second operative position in which the at least one material conveying edge is spaced from the rotor in the radial direction by a second distance, the second distance being less than the first distance.

Disclosed is a harvesting combine rotor cage top cover assembly that includes an overhead roof formed from a substantially horizontal flat section and downwardly angled side sections. A series of substantially parallel vanes are located beneath the overhead roof. Each vane is formed from a substantially flat top section located against the roof horizontal flat section and downwardly laterally extending legs being angled on their sides and having an arcuate bottom. The sides of the vanes are rotatable about a central pivot for promoting or retarding the flow of material in the rotor cage.

A grain cleaning system for a combine harvester having a transmitter adapted to transmit a base signal at a known frequency and one or more spaced receivers for detecting signals of a different frequency as reflected from airborne grain and other materials within the duct of the grain cleaning system. An Electronic Control Unit modulates the base signal and the reflected signals to obtain Doppler signals or frequencies from which an average particle velocity is determined. The particle velocity is used as an input parameter for the generation of control signals for the adjustment of various working units of the combine harvester including, by way of example, the fan and sieves.

A threshing system including a rotor cage with a plurality of slots therein, a first bank of vanes and a second bank of vanes arranged within the cage. An adjustable vane control system is coupled to the rotor cage and the banks of vanes. A first and second member are respectively pivotally coupled the vanes in the first bank and the vanes of the second bank through corresponding slots. Linkages couple an arm to the members. The first and second members each having a range of travel defined by the slots. The members each having a surface facing the outer surface of the rotor cage, the surfaces of the first member and the second member each remain tangent to the outer surface of the rotor cage as the first member and the second member are moved within their range of travel.

A combine having a feeder housing for receiving harvested crop, a separating system for threshing the harvested crop to separate grain from residue, a residue spreader wheel spinning for expelling the residue from the combine, and a controller that controls the combine. The controller is configured to control the residue spreader wheel to continuously oscillate between a first speed less than a nominal speed and a second speed greater than the nominal speed while spreading the residue.

A combine has a grain sample sensor for detecting frequencies of impacts of separated grain on the grain sample sensor, a grain loss sensor for detecting frequencies of impacts of residue and lost grain on the grain loss sensor, and a controller. The controller is configured to receive, from the grain sample sensor, the frequencies of the impacts of the separated grain, receive, from the grain loss sensor, the frequencies of the impacts of the residue and the lost grain, set a detection frequency band based on the frequencies of the impacts of the separated grain, filter the frequencies of the impacts of the residue and the lost grain based on the detection frequency band, determine, from the filtered frequencies, grain loss information, and indicate the grain loss information to an operator of the combine, or control the combine based on the grain loss information.

A threshing and separating system for a combine harvester includes a threshing cage and a plurality of movable vanes mounted to the threshing cage. The threshing cage partially surrounds a threshing rotor. The plurality of movable vanes are moveable between a first position in which all of the vanes of the plurality of movable vanes are substantially parallel with one another and a second position in which an acute angle is defined between each pair of adjacent vanes of the plurality of movable vanes. The acute angles progressively increase in the rearward direction of the threshing cage such that the acute angle between adjacent vanes at a forward end of the threshing cage is less than the acute angle between adjacent vanes at a rearward end of the threshing cage.

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 dynamically operated concave threshing bar system, method, and apparatus wherein one or more threshing bars within a concave can dynamically move to various positions in real-time based on one or more conditions such as the type crop being harvested and on a determination by a combine harvester's computerized system, artificial intelligence (AI) system, or upon the operators input, among others. The concave can include a concave frame having a pair of arcuate side members, a threshing bar, and an actuator coupled to the threshing bar, wherein the actuator can be configured to move the threshing bar along the arcuate side members of the concave frame.

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.