Chaff spreading arrangement for a combine
Patent 4614197 Issued on September 30, 1986. Estimated Expiration Date: 
October 15, 2004. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
October 15, 2004. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 754448 3450286 3669123 Chaff spreading attachment for harvesters Straw and chaff chopper and spreader Pneumatic material handling system for combines Straw chopper and spreader assembly Patent #: 4526180 InventorsAssigneeApplicationNo. 06/660831 filed on 10/15/1984US Classes:460/112, With chopper241/101.762, Operated while propelled56/503Rotating on vertical axisExaminersPrimary: Peshock, RobertAssistant: Tarnoff, David I. International ClassesA01D 41/00 (20060101)A01D 41/12 (20060101) AbstractIn a combine harvester, the chaff discharged from the cleaning shoe is funneled towards the downwardly directed inlet of a pneumatic conveyor and transferred, by the conveyor, to the inlet of a rear mounted straw chopper. In this way, the relatively light chaff material is mixed with heavier straw helping to spread the chaff more widely and uniformly. The upward intake or ingestion at the conveyor inlet aerodynamically screens out undesirably heavy material, allowing it to fall to the ground.Other References
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