DEVICE AND METHOD FOR CHANGING CLEANING SHOE SHAKER ARM ANGLE
FIG7 depicts a side elevation view of a cleaning system of a combine according to still another alternative embodiment 
FIG7 depicts a fifth exemplary embodiment of a cleaning system. The fifth embodiment is substantially similar to the first embodiment with the exception that the first end 110 of the rocker arm 106 is fixed to the shoe 104 at only one position, and the second end 108 of the rocker arm 106 is selectively mounted to a subset of the series of holes 702 (e.g., five holes) that are disposed on a curved surface 704 of the frame 102 using fasteners 130. The curve 704 is centered about the axis passing through the end 110 of the rocker arm 106. In use, the end 108 of the rocker arm 106 could be mounted to two of those five holes 702 such that the throwing angle A of the rocker arm 106 is maintained at the first predetermined angle. Alternatively, the end 108 of the rocker arm 106 could be mounted to two different holes of the five holes 702 such that the throwing angle A of the rocker arm 106 is maintained at the second predetermined angle.
side view
704
curved surface
104
shoe
702
holes
102
frame
108
end
['1. A cleaning system (100) for a combine harvester having an adjustable throwing angle, the cleaning system comprising: a shoe (104) for holding a sieve of the cleaning system; a mounting surface (143) disposed on the shoe (104); and a rocker arm (106) either movably or removably connected to the mounting surface (143), characterized in that  the rocker arm (106) being configured to be mounted to the mounting surface (143) at at least two different locations on the mounting surface (143), each location resulting in a different throwing angle (A) of the shoe (104) of the cleaning system (100).', '3. The cleaning system of claim 1 or 2,  characterized in that  the rocker arm (106) includes two opposed ends (108, 110), one opposed end (110) being releasably connected to the mounting surface (143), and the other opposed end (108) being connected to a fixed point on the combine harvester.', '5. The cleaning system of claim 3 or 4  characterized in that  the cleaning system further comprises a frame of the combine harvester, said other opposed end being mounted to the frame (102).']