Abstract: A liftable and lowerable product receiving arrangement for agricultural machines, especially for self-propelling harvester threshers, comprises a cutting mechanism platform having a front end, a flexible cutting bar mounted on the front end of the cutting mechanism platform, sliding skids arranged to support the cutting bar in a height-displaceable manner relative to the cutting mechanism platform, and supporting skids associated with the cutting mechanism platform and arranged behind the flexible cutting bar as considered in a transporting direction and at least in its both lateral end regions, the supporting skids have lower limits extending at most at a height of one of the cutter bar and the sliding skids.

Abstract: A sugar-cane harvester having a frame and a cutter unit is provided with means for adjusting a vertically swingable cutter unit having a skid engaging the ground in its traveling path over uneven ground. This means includes a double-acting hydraulic piston-cylinder unit and a spring whose force counteracts the major part of the weight of the cutter unit. The piston of the hydraulic unit is connected to the cutter unit whereas its cylinder is connected to the frame of the harvester. The adjusting assembly further includes a slide adapted to selectively supply with a working fluid each of two opposite ends of the cylinder chamber, and a pair of electro-magnetic valves actuating the movement of the slide in two opposite directions in response to any inclined position of the cutter unit in its travelling path over uneven ground.