Adjustable top cover vanes for controlling crop flow in a rotary thresher

1. A harvesting combine rotor cage top cover assembly of a rotor cage through which there is a flow of material, which comprises:

(a) an overhead roof formed from a substantially horizontal flat section and downwardly angled side sections; and

(b) a series of substantially parallel vanes located beneath the overhead roof, each vane 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 downwardly laterally extending legs of the vanes being rotatable about a central pivot for promoting or retarding the flow of material in the rotor cage;

(c) parallel bars located atop the overhead roof substantially horizontal flat section and which attach about either side of the central pivot using bushing spacers, the parallel bars flexing and sealing against the overhead roof;

(d) arcuate slots formed in the overhead roof substantially horizontal flat section on either side of the central pivot;

(e) linear actuators attached to each of the parallel bars; and

(f) bolt assemblies extending through each vane, arcuate slot, and parallel bars, such that oppositely moving each linear actuator results in gang rotation of the vanes about the bolt assemblies,

wherein the vanes and overhead parallel bars are divided into sections, each section being driven by a different linear actuator for separately adjusting the angle of the vanes in each section;

wherein each section of vanes is set at an angle from at least one other section and the angles of each section of vanes is held constant relative to the at least one other section; and

wherein a connecting mechanism is used to maintain the different angle of each section relative to the at least one other section.

2. The harvesting combine rotor cage top cover assembly of claim 1 , wherein the connecting mechanism is a turnbuckle assembly.

3. A harvesting combine rotor cage top cover assembly, which comprises:

(a) an overhead roof having arcuate slots and downwardly angled side sections;

(b) a series of substantially parallel vanes located beneath the overhead roof, each vane formed from a top section located against the roof and downwardly laterally extending legs being angled on their sides and having an arcuate bottom, the sides of the vanes being rotatable about a central pivot for promoting or retarding the flow of material in the rotor cage;

(c) parallel bars located atop the overhead roof and which attach about either end of the vanes using bushing spacers, the parallel bars flexing and sealing against the overhead roof;

(d) linear actuators attached to each of the parallel bars; and

(e) bolt assemblies extending through each vane, arcuate slot, and parallel bars, such that oppositely moving each linear actuator results in gang rotation of the vanes about the bolt assemblies,

wherein the vanes and overhead parallel bars are divided into sections, each section driven by a different linear actuator for separately adjusting the angle of the vanes in each section;

wherein each section of vanes is set at an angle from at least one other section and the angles of each section of vanes is held constant relative to the at least one other section; and

wherein a connecting mechanism is used to maintain the different angle of each section relative to the at least one other section.

4. The harvesting combine rotor cage top cover assembly of claim 3 , wherein the connecting mechanism is a turnbuckle assembly.