Combine harvester grain cleaning apparatus
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United States of America Patent
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Aug 30, 2016
Grant Date -
Mar 6, 2014
app pub date -
Dec 15, 2011
filing date -
Jan 17, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
A combine harvester comprises an oscillating thresher pan (128;228;328) for conveying a chaff/grain stream rearwardly to a rear edge from where the grain/chaff stream falls under gravity into a cleaning unit (148;248;348). The cleaning unit, or shoe, includes at least one vibrating pan (150;250;350,151;251;351) onto which the grain/chaff stream falls. The cleaning unit comprising a fan (52) for generating a cleaning airstream which is directed through the failing grain/chaff stream. The cleaning pan, when in use, is provided with a damping surface to damp bounce of kernels falling thereupon. In one example, the damping surface is provided by a sheet of rubber (284,288).
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