DILUITORE VOLUMETRICO, PARTICOLARMENTE ADATTO ALL'IMPIEGO SU APPARECCHIATURE PER ANALISI CHIMICO-CLINICHE

The device consists of a preferably transparent vessel (40), incorporating chambers (12, 14) for receiving diluent and sample volumes respectively, two pistons (16, 18) being axially reciprocable therein by means of a driven cam mechanism (42). The diluent chamber (12) has an opening (20) which is connected either with a diluent supply (26) or the sample chamber (14) by a solenoid valve (24). The sample chamber (14) has a diluent inlet (22') and a sample inlet (22) through which the diluted sample is also discharged. The device operates as follows. In a filling phase (Figure 1), solenoid (24) connects chamber (12) with the supply (26), the sample chamber (14) is placed in communication with a sample supply (not shown) and the pistons (16; 18) move downwards to allow filing of the respective chambers (12, 14). Then in a diluter phase (Figure 2) solenoid (24) interconnects the chambers (12, 14) and the pistons move upwards to introduce the diluent into the sample chamber (14) and expel the resultant mixture therefrom. Coordination of the solenoid (24) with the piston movement is achieved by means of an exuder (60, 68) mounted on the cam assembly drive (62, Figure 5).