A combine harvester includes threshing apparatus, a grain pan and a cleaning unit. The grain pan is arranged to collect a grain/chaff stream from the threshing apparatus and is driven in an oscillating manner to convey the collected grain/chaff to a rear edge from where the grain/chaff stream falls into the cleaning unit. The cleaning unit includes a fan unit for generating an airstream directed through the grain/chaff stream falling from the rear edge and an airstream vented above the grain pan.

A combine harvester includes threshing apparatus, a grain pan and a cleaning unit. The grain pan is arranged to collect a grain/chaff stream from the threshing apparatus and is driven in an oscillating manner to convey the collected grain/chaff to a rear edge from where the grain/chaff stream falls into the cleaning unit. The cleaning unit includes a fan unit for generating an airstream directed through the grain/chaff stream falling from the rear edge and an airstream vented above the grain pan.

A threshing concave assembly is disclosed having a threshing concave bar wherein the threshing bar is comprised of two threshing surfaces having a dihedral angle relationship relative to each other. In addition, in another aspect the threshing bar can be comprised of two dihedral surfaces whereby one surface face has about 130% greater surface area than its adjacent surface face. Alternatively, one surface face of the threshing bar can be 1.3x wider than its adjacent surface face. In another aspect the threshing bar can be comprised of two dihedral surfaces whereby one surface face has about a 170% greater surface area than its adjacent surface face.

A first threshing section 15 and a second threshing section 16 are provided. The first threshing section 15 includes a first threshing drum 17 that rotates about a left-right-oriented axis, and the second threshing section 16 includes a second threshing drum 28 that rotates about a body front-rear-oriented axis. The second threshing drum 28 includes a rotary support shaft 29 extending along a front-rear direction, a plurality of rod-shaped frame bodies 30 that are arranged side by side extending along the front-rear direction and at and interval in the peripheral direction, radially outward of the rotary support shaft 29, and threshing teeth 31 attached to the frame bodies 30.

A first threshing section 15 and a second threshing section 16 are provided. The first threshing section 15 includes a first threshing drum 17 that rotates about a left-right-oriented axis, and the second threshing section 16 includes a second threshing drum 28 that rotates about a body front-rear-oriented axis. The second threshing drum 28 includes a rotary support shaft 29 extending along a front-rear direction, a plurality of rod-shaped frame bodies 30 that are arranged side by side extending along the front-rear direction and at and interval in the peripheral direction, radially outward of the rotary support shaft 29, and threshing teeth 31 attached to the frame bodies 30.

An apparatus and method for separating plant flowers from stalks by means of a lateral rotating tube having a plurality of flexible, elongated members affixed to and extending radially outward from the tube. The apparatus may include a platform and a frame supporting the tube above the platform to accommodate plants held between the platform and the tube so that when the tube is rotating, the elongated members affixed thereto brush against the plants and cause the flowers to brush off at and separate from the stalks. The frame further supports a housing to form a contained space, with a hood to direct the flow of flowers after separation from the stalks. The back wall is positioned a distance away from the platform to allow separated flower and stalk to be eliminated from the apparatus.

An apparatus and method for separating plant flowers from stalks by means of a lateral rotating tube having a plurality of flexible, elongated members affixed to and extending radially outward from the tube. The apparatus may include a platform and a frame supporting the tube above the platform to accommodate plants held between the platform and the tube so that when the tube is rotating, the elongated members affixed thereto brush against the plants and cause the flowers to brush off at and separate from the stalks. The frame further supports a housing to form a contained space, with a hood to direct the flow of flowers after separation from the stalks. The back wall is positioned a distance away from the platform to allow separated flower and stalk to be eliminated from the apparatus.

A combine harvester includes a rotor cage surrounding a rotor, a threshing space defined between the rotor cage and the rotor, and a transition section defining an infeed to the rotor cage. The transition section is mounted to the rotor cage at a location upstream of the rotor cage. The transition section has an inlet for receiving the crop material. The harvester also includes a crop conveying drum for conveying crop material to the inlet of the transition section and beneath the rotor. The crop conveying drum is at least partially encased by a shroud. The transition section includes a bottom wall, two side walls each having lower portions extending substantially vertical with respect to the bottom wall, and curved side walls each extending between the bottom wall and one of the side walls. The bottom wall is substantially tangential to a lower portion of the shroud.

A combine harvester includes a rotor cage surrounding a rotor, a threshing space defined between the rotor cage and the rotor, and a transition section defining an infeed to the rotor cage. The transition section is mounted to the rotor cage at a location upstream of the rotor cage. The transition section has an inlet for receiving the crop material. The harvester also includes a crop conveying drum for conveying crop material to the inlet of the transition section and beneath the rotor. The crop conveying drum is at least partially encased by a shroud. The transition section includes a bottom wall, two side walls each having lower portions extending substantially vertical with respect to the bottom wall, and curved side walls each extending between the bottom wall and one of the side walls. The bottom wall is substantially tangential to a lower portion of the shroud.

A harvesting machine including a cutting head configured to provide cut crop for threshing. The harvesting machine includes a conveyer disposed adjacent to the cutting head and configured to move the cut crop to be threshed along a path. A thresher is configured to thresh the cut crop to provide threshed grain from the cut crop. A separator is disposed adjacently to the thresher and is configured to separate debris from the threshed grain. A feed accelerator is disposed between the conveyor and the thresher, wherein the feed accelerator is configured to advance the cut crop along the path from the conveyor to the thresher. A pre-threshing device is disposed adjacently to the feed accelerator, wherein the feed accelerator interacts with the pre-threshing device to provide threshed grain, and the pre-threshing device is configured to collect the threshed grain before the remaining cut crop is threshed at the thresher.