Abstract: Automatic storing device comprising a storage container for storing objects in a plurality of locations which locations are defined by one of housings and shelves arranged side-by-side and on a plurality of levels. A device is provided for loading and unloading the objects into and out of the locations. The device for loading and unloading the objects comprises a platform for supporting an object. A mechanism is also provided for moving the platform from one level to another. A pair of pliers adapted to grip an object is provided. The pliers comprise two parallel pivoting branches. Each of the two branches is pivotally mounted and has a free end adapted to grip the object. A first moving mechanism adapted to move the two branches in the same direction is provided. A second moving mechanism adapted to move the two branches towards and away from each other is also provided.

Abstract: In a chromatographic column assembly comprising a tubular column a first end of which is sealed, the second end of said column is also sealed in order to form an enclosure between said second end and a piston. A pressurized fluid introduced into this enclosure displaces the piston in the direction corresponding to compression of a packing or filling provided in the column. A flexible conduit ensures the circulation of a fluid to be chromatographed and crosses through the piston, the enclosure containing the pressurized fluid and the second end of the column.