A threshing or separating concave for grain harvesting is equipped with curved cheeks, between which concave bars having an elongated cross-sectional profile extend, the curved inside edges of which are provided with a rounded inside edge, and having concave rods extending in the direction of the curve, which pass through holes in the concave bars that are immediately adjacent to the rounded inside edge.

A threshing or separating concave for grain harvesting is equipped with curved cheeks, between which concave bars having an elongated cross-sectional profile extend, the curved inside edges of which are provided with a rounded inside edge, and having concave rods extending in the direction of the curve, which pass through holes in the concave bars that are immediately adjacent to the rounded inside edge.

A threshing concave for a combine harvester comprises a crop processing device which is arranged at the inlet to the threshing concave and can be adjusted between an active and an inactive position, adjustable elements which are arranged downstream of the inlet to the threshing concave and can be adjusted between an active and an inactive position, and an adjustment mechanism for separate adjustment of the crop processing device and the adjustable elements, which comprises a movable adjustment element which is coupled to the crop processing device and to the adjustable elements.

A threshing concave for a combine harvester comprises a crop processing device which is arranged at the inlet to the threshing concave and can be adjusted between an active and an inactive position, adjustable elements which are arranged downstream of the inlet to the threshing concave and can be adjusted between an active and an inactive position, and an adjustment mechanism for separate adjustment of the crop processing device and the adjustable elements, which comprises a movable adjustment element which is coupled to the crop processing device and to the adjustable elements.

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 concave segment (6) for combine harvesters (1), which is provided for separating harvest (2), extends in a circumferential direction (65) in a curve about a concave axis (53), and includes numerous finger strips (62). The finger strips (62) each have a transverse strip (67), wherein the transverse strips (67) each extend in a direction of extension parallel to the concave axis (53), and wherein numerous fingers (63) are disposed on each of the transverse strips (67). The fingers (63) have a curved cross section thereby, and/or the transverse strips (67) have a wave shape (74) in the direction of extension (70).

A concave segment (6) for combine harvesters (1), which is provided for separating harvest (2), extends in a circumferential direction (65) in a curve about a concave axis (53), and includes numerous finger strips (62). The finger strips (62) each have a transverse strip (67), wherein the transverse strips (67) each extend in a direction of extension parallel to the concave axis (53), and wherein numerous fingers (63) are disposed on each of the transverse strips (67). The fingers (63) have a curved cross section thereby, and/or the transverse strips (67) have a wave shape (74) in the direction of extension (70).

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.