SYSTEM OF MECHANICAL FEED OF RETURNS FOR SECONDARY THRESHING TO RETURN BOARD Russian patent published in 2013 - IPC A01D41/00 A01F12/44 

FIELD: agriculture.

SUBSTANCE: proposed group of inventions relates to combine harvesters. The system of secondary threshing for the combine with a cleaning system, comprising at least one sieve 46, 48, which comprises a board 59 for collection of returns, designed to collect returns, which does not pass through the specified sieve 46, 48, a mechanism of secondary threshing, where the specified returns arrive from the specified collection board 59 and in which secondary threshing of the specified returns takes place, a distributing screw 96, stretching across the specified system of cleaning and functioning for distribution of the secondary threshed returns in the specified system of cleaning. At the same time the cleaning system has a return board 45 for distribution of grain material in the specified sieve 46. The distributing screw 96 is made as capable of substantially even distribution of secondary threshed returns across the specified return board 45. Also the combine is disclosed, which comprises the described system of secondary threshing of returns, as well as the method of secondary threshing of returns.

EFFECT: invention protects grain of crops sensitive to mechanical actions against damages, eliminates grain circulation along a continuous circuit.

7 cl, 6 dwg