A handheld harvester apparatus may include a threshing assembly and a screening assembly within a housing. The threshing assembly may include a threshing drum with a plurality of blades coupled to a first axle. The plurality of blades may include a set of teeth configured to strip a plurality of seeds and plant material from a plant. The screening assembly may include a paddle assembly configured to receive the plurality of seeds and plant material from the threshing assembly, the paddle assembly including a plurality of paddles coupled to a second axle. The screening assembly may include a screen assembly positioned beneath the paddle assembly, the screen assembly including a plurality of pass-through apertures configured to define a threshold for the plurality of seeds. The screening assembly may include a collection chamber configured to receive any of the plurality of seeds that exit the plurality of pass-through apertures.

A handheld harvester apparatus may include a threshing assembly and a screening assembly within a housing. The threshing assembly may include a threshing drum with a plurality of blades coupled to a first axle. The plurality of blades may include a set of teeth configured to strip a plurality of seeds and plant material from a plant. The screening assembly may include a paddle assembly configured to receive the plurality of seeds and plant material from the threshing assembly, the paddle assembly including a plurality of paddles coupled to a second axle. The screening assembly may include a screen assembly positioned beneath the paddle assembly, the screen assembly including a plurality of pass-through apertures configured to define a threshold for the plurality of seeds. The screening assembly may include a collection chamber configured to receive any of the plurality of seeds that exit the plurality of pass-through apertures.

A threshing pin for use with a threshing cylinder of a harvesting machine is disclosed. The pin has an attachment portion for attaching the pin to the threshing cylinder, and a threshing portion extending from the attachment portion for contacting the material to be threshed, wherein the threshing portion includes a recess in an outer surface of the threshing portion, the recess being occupied by a wear life-extending material. A corresponding method is also disclosed.

A system for controlling the aggressiveness of a tailings processor that re-threshes tailings received from the grain cleaning system in an agricultural harvester is provided with at least one imaging device to image a grain sample. At least a portion of the grain sample has at least once passed through the tailings processor. A controller is connected to the imaging device and to an arrangement to automatically adjust the aggressiveness of the tailings processor. The controller is configured to automatically adjust the aggressiveness of the tailings processor using the arrangement, based on based on the level of broken grain and/or unthreshed grain determined from the image from the at least one imaging device by comparing the level of broken grain and/or unthreshed grain to the desired level.

A system for controlling the aggressiveness of a tailings processor that re-threshes tailings received from the grain cleaning system in an agricultural harvester is provided with at least one imaging device to image a grain sample. At least a portion of the grain sample has at least once passed through the tailings processor. A controller is connected to the imaging device and to an arrangement to automatically adjust the aggressiveness of the tailings processor. The controller is configured to automatically adjust the aggressiveness of the tailings processor using the arrangement, based on based on the level of broken grain and/or unthreshed grain determined from the image from the at least one imaging device by comparing the level of broken grain and/or unthreshed grain to the desired level.

A method and device for harvesting grain crops is provided. A threshing method includes separating grain from harvested material, which is fed to a threshing phase after a gathering process taking place against a direction of working travel. During threshing, the harvested material is processed as the respective grain crops and admixtures in the form of straw and chaff such that essential, dischargeable admixtures are separated from the grain crops, and these, in the form of a mixture with chaff or similar fine particles, are fed as a grain/chaff stream to a final cleaning. The grains free of these residual admixtures are subsequently collected as grain crops. During at least one feed phase preceding the final cleaning, a transport movement is imparted to the at least one grain/chaff stream with the transport movement having a component in a vertical direction and a component in the direction of working travel.

A rotor for an agricultural implement such as a self-propelled harvester. The rotor includes a surface and one or more rasp bars which comprise a crop engaging portion that is immobile relative to the surface and a crop engaging portion that is movable relative to the surface, in that a distance between at least part of the movable portion and the surface of the rotor is variable. One of the crop engaging portions is a primary portion configured to engage with crop regardless of whether it is movable or not, while the other is a secondary portion that comprises a crop engaging feature such as a tooth for increasing traction on the crop. The crop engaging feature is activated, by either extending radially outwardly from the primary portion, or deactivated by lying at a same radial position or radially inwardly of the primary portion.

A driver assistance system for a combine harvester that has a processing stage with an input for a crop flow, a first output for a useful flow and has abundant threshed grains, and a second output for a residual flow with scarce grains. At least one operating parameter of the processing stage is adjustable. The driver assistance system has an actuatable rethreshing device arranged at the second output of the processing stage, a residual grain sensor for detecting a proportion of threshed out grain in the residual flow downstream of the rethreshing device, and an evaluating device that turns the rethreshing device on and off, compares the proportions of threshed out grains in the residual flow when the rethreshing device is turned on and when the rethreshing device is turned off, and to adapt the at least one operating parameter of the processing stage based on the comparison.

A driver assistance system for a combine harvester that has a processing stage with an input for a crop flow, a first output for a useful flow and has abundant threshed grains, and a second output for a residual flow with scarce grains. At least one operating parameter of the processing stage is adjustable. The driver assistance system has an actuatable rethreshing device arranged at the second output of the processing stage, a residual grain sensor for detecting a proportion of threshed out grain in the residual flow downstream of the rethreshing device, and an evaluating device that turns the rethreshing device on and off, compares the proportions of threshed out grains in the residual flow when the rethreshing device is turned on and when the rethreshing device is turned off, and to adapt the at least one operating parameter of the processing stage based on the comparison.

A threshing and separating system for an agricultural harvester includes a concave having a plurality of perforations; a rotor having an outer surface and at least partially enclosed by the concave; and a plurality of rasp bars connected to the outer surface of the rotor, each rasp bar having a working surface defining a working angle relative to a tangent of the outer surface. At least one of the rasp bars is an adjustable rasp bar with an adjustable working surface pivotably coupled to the rotor. The system further includes an actuator coupled to the adjustable rasp bar and configured to selectively pivot the adjustable working surface to adjust the working angle of the adjustable rasp bar.