Chaff and straw spreading attachment for combines
Patent 4637406 Issued on January 20, 1987. Estimated Expiration Date: 
August 9, 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.
August 9, 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 1021917 3317064 3450286 3469773 3664349 3669123 3800804 3816023 Fan rotor for crossflow fan InventorsAssigneeApplicationNo. 06/639251 filed on 08/09/1984US Classes:460/112, With chopper241/101.71, With support vehicle416/178, PERIMETRIC BLADING EXTENDING AXIALLY BETWEEN ANNULAR MEMBERS (E.G., SQUIRREL CAGE TYPE, ETC.)56/14.6With thresher or crop-separator unitExaminersPrimary: Mancene, GeneAssistant: Tarnoff, David I. Attorney, Agent or FirmInternational ClassesA01D 41/00 (20060101)A01D 41/12 (20060101) A01F 12/40 (20060101) AbstractThe discharge hood of an agricultural combine has a housing suspended from the bottom thereof in disposition for receiving straw from straw walkers of the combine into a rotary chopper which impacts the straw and propels it rearwardly out through a spreader, while at the same time creating a current of air flowing through the housing. A second inlet positioned forwardly adjacent the straw inlet of the housing is located to receive a stream of chaff from a forwardly disposed chaff discharge of the combine so that both the chaff and the straw are passed through the chopper, admixed into a single stream, and propelled upwardly and rearwardly from the combine to be strewn and scattered across the ground behind the advancing machine. A booster fan adjacent the chaff discharge augments the air suction created at the chaff inlet of the housing by the high-speed chopping rotor to assure conveyance of the light chaff particles across the free space between the chaff just discharged and the chopper housing.Other References
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