Abstract: A sieve for separating grain crops from a chaff-straw mixture, used in agricultural harvesting machines, particularly harvester threshers and which is passed from below by a blower wind current includes alternating elongated grooves and channels aligned in parallel relative to the crop conveying direction. The grooves and channels are alternately open on the top or on the bottom, respectively, and have lateral legs with openings, through which the crop can pass from the grooves open on the top to the channels open on the bottom.

Abstract: A cleaning sieve assembly disposed at the end of and below a transporting conveyor of the harvested crop in the harvesting machine includes an upper or shaff sieve and a lower sieve both subjected to an air current blown from a blower. The upper sieve includes a plurality of inclined sieve zones, which may be descending or ascending in respect to the plane of the sieve with the inclination which is adjustable.

Abstract: The invention concerns a coupling for connecting hydraulic lines having a first coupling part 1 with a first valve 6, which is received into a housing 3, and including means for receiving a second coupling part 2, which includes a second valve 64. The truncated conical valve body 30 of first valve 6 is urged in the closing direction by a separate closing spring 33. Valve body 30 of first valve 6 is then penetrated by an actuator, which is adjustable in the direction of second valve 64, and which actsacross an actuating surface cooperatively with an actuating shaft 7 disposed diagonally to the valve axis and penetrates housing 3 of first coupling part 1, which actuating surface, on the one hand, acts on valve body 30 of first valve 6 and, on the other hand, on an actuator 35. The actuator 35 is urged toward actuating surface 22 by means of an opening spring 37 supported by valve body 30.