IN-LINE GRAIN COMBINE HARVESTER Russian patent published in 2013 - IPC A01D41/00 A01F7/06 

FIELD: agriculture.

SUBSTANCE: invention relates to agricultural machinery industry. The harvester comprises a header, feed elevator, threshing and separation unit and a blower. The threshing and separation unit is made in the form of outer, middle and inner screw drums coaxially mounted with a clearance. The outer drum is made along the perimetre of three or more strips of variable width folded in the vertical plane and connected in series with each other. The middle drum is mounted of sections made of an even number of equilateral perforated triangles interconnected by the lateral sides. The sections are interconnected by third free sides of the triangles to form the screw drum. Along the perimetre of the screw drum there are polygonal right and left helical curves directed towards each other with inner helical grooves. The inner drum is made in the form of a multiple thread grate surface mounted from at least one transversal solid bar. The transversal bar is deformed to form alternating peaks and cavities of triangular shape and is rolled into spiral coils. The preliminary twisted longitudinal bars are rigidly attached in the peaks.

EFFECT: increased productivity of threshing and separation unit.

2 cl, 30 dwg