Device for picking up, displacing and delivering products.

摘要

A device for the exchange of specimens, for example for X-ray analysis, comprises a bush (6) which is secured to a piston (7) accommodated in a cylinder (1) so that displacement of a pressurized fluid in the cylinder displaces the piston and the bush parallel to a centre line of the bush. When means for restricting the displacement are provided, the specimens can be exchanged between two positions to be selected.