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 1.3× 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 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 1.3× 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 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 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 combine harvester threshing drum threshing bar includes a threshing fixture including a leading edge, an opposed trailing end, a top threshing side, including a trailing threshing face that extends between the trailing end and the corner and a leading threshing that inclines downwardly from the corner to the leading edge to form a wedge in the threshing fixture, an opposed bottom threshing drum emplacement side, a first bore and a second bore. The first bore includes a first hole open to trailing threshing face that enlarges a second hole open to the threshing drum emplacement side. The second bore includes a third hole open to leading threshing face that enlarges a second hole open to the threshing drum emplacement side.

A combine harvester threshing drum threshing bar includes a threshing fixture including a leading edge, an opposed trailing end, a top threshing side, including a trailing threshing face that extends between the trailing end and the corner and a leading threshing that inclines downwardly from the corner to the leading edge to form a wedge in the threshing fixture, an opposed bottom threshing drum emplacement side, a first bore and a second bore. The first bore includes a first hole open to trailing threshing face that enlarges a second hole open to the threshing drum emplacement side. The second bore includes a third hole open to leading threshing face that enlarges a second hole open to the threshing drum emplacement side.

Steps to manufacturing a feed beater for a twin axial-flow crop processor in a combine harvester including cutting a flat state vane element from sheet material and bending along predetermined bend lines before being secured to a rotor core. The vane element includes a transverse vane section parallel to the rotation axis, and a directional vane section having an effective edge that extends at a non-zero angle to the rotation axis.

A thresher for a combine harvester has a concave cage and a rotor disposed within the concave cage. The rotor carries material manipulators that extend outward from the rotor toward the cage to manipulate material in the concave cage as the rotor rotates. One or more air nozzles are provided that direct air outward from the rotor and toward the concave cage. A source of forced air circulates air through the one or more air nozzles.

A threshing and separating system includes a concave; a shaft defining an axis of rotation which is parallel to the concave and transverse to a longitudinal axis; and a plurality of slats rotated by the shaft and configured to move crop material against the concave. The slats have a helical shape winding around the axis of rotation. The slats include a first set of slats being predominantly on a left side of the shaft and having a left-handed helical shape, and a second set of slats being predominantly on a right side of the shaft and having a right-handed helical shape. At least one slat of said first set of slats is staggered relative to a closest slat of said second set of slats, such that a portion of a slat length of said at least one slat is overlapped with one or more adjacent slats of said second set.

A threshing and separating system includes a concave; a shaft defining an axis of rotation which is parallel to the concave and transverse to a longitudinal axis; and a plurality of slats rotated by the shaft and configured to move crop material against the concave. The slats have a helical shape winding around the axis of rotation. The slats include a first set of slats being predominantly on a left side of the shaft and having a left-handed helical shape, and a second set of slats being predominantly on a right side of the shaft and having a right-handed helical shape. At least one slat of said first set of slats is staggered relative to a closest slat of said second set of slats, such that a portion of a slat length of said at least one slat is overlapped with one or more adjacent slats of said second set.