Device for combine harvesters equipped with a rotary straw chopper
Patent 4913679 Issued on April 3, 1990. Estimated Expiration Date: 
January 31, 2009. 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.
January 31, 2009. 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 3450286 3669123 Chaff and straw spreading attachment for combines Patent #: 4637406 InventorApplicationNo. 298882 filed on 01/31/1989US Classes:460/112, With chopper414/505, Pivotally460/99, Air control affecting air flow460/100, With fan feature460/114TRANSPORT CONVEYORExaminersPrimary: Novosad, Stephen J.Attorney, Agent or FirmForeign Patent References
International ClassesA01D 041/12A01F 012/40 Foreign Application Priority Data1986-07-11 SEAbstractA device for combine harvesters (11) equipped with impact straw cutters (16) of the kind equipped with a cleaning device (13) for separation of chaff from the grain and which rotary chopper is connected to the straw outlet (17) of the combine harvester, whereby the chaff coming from the cleaning device (13) and being transported by a flow of air is intended to be supplied to the rotary chopper (16). The rotary chopper is connected to the straw outlet (17) of the combine harvester. The purpose of the invention is to provide a device by which the chaff is spread over the entire harvesting breadth of the combine harvester and is also efficiently admixed with the comminuted straw such that a continuous and even distribution can be obtained on the field. This has been solved by designing the rotary chopper (16) as a lateral flow blower which is arranged to create a negative pressure at the inlet (21) of the rotary chopper, and the outlet of the cleaning device (13) is directed obliquely upwards towards the fall-out area of the straw above the inlet (21) of the rotary chopper such that the chaff is mixed with the straw prior to their reaching the rotary chopper and that the flow of air transporting the chaff to the inlet of the rotary chopper is so dimensioned as to have a pressure within the fall-out area of the straw which slightly exceeds the atmospheric pressure.Field of SearchFor disparate cutting operationsIn series arrangement With conveyer between units With distinct plural paths to striking member Rotating or oscillating feed or discharge conveyor With material feed and/or discharge mechanism or control Endless belt conveyer Hopper With roll or rotary material agitator Pivotally Rotary cleaner Air control affecting air flow With fan feature STRAW CHAFF SPREADER OR HANDLING (DISCHARGE) With chopper GRAIN CLEANER STRAW OR CHAFF STACKER | |
