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Pub. No.:    WO/2018/081752    International Application No.:    PCT/US2017/059122
Publication Date: Fri May 04 01:59:59 CEST 2018 International Filing Date: Tue Oct 31 00:59:59 CET 2017
IPC: A01F 12/44
Applicants: BALASUBRAMANIAN, Mannarsamy
Inventors: BALASUBRAMANIAN, Mannarsamy
An improved winnowing machine with a forced air supply causing chaff and product portions such as kernel materials to flow through a transit tube. The forced air enters near the bottom of the tube. The product portions enter at approximately the middle part of the transit tube. Chaff exits near the top of the transit tube. The chaff and kernels take a circuitous route within the transit tube causing the chaff to remain longer in the tube thereby increasing the ability to separate the chaff from the kernel while at the same time creating a more compact winnowing machine suitable for small scale operations. A preferred embodiment includes the circuitous spinning route member having a plurality of paddles in a ninety degree orientation with respect to the length of the transit tube. The paddles revolve around a central shaft in a spiral stair-step configuration and the central shaft rotated by a motor.