Apparatus for automatically producing solutions at predetermined dosages

An apparatus for automatically producing solutions in predetermined dosages of a main fluid and a concentrate added to the main fluid, the apparatus comprising:

• a mixing container;
• a dosing device associated to the mixing container, the dosing device including means for discharging the main fluid into the mixing container in a predetermined amount and including a plunger reciprocating in a cylinder between two end positions and having two sides with control means for alternately supplying the main fluid under pressure into the cylinder to impinge one and the other side of the plunger wherein the main fluid causing a movement of the plunger in one direction remains in the cylinder and is dischargeable to the mixing container when the main fluid impinges the plunger to cause a movement of the plunger in the opposite direction, and means for discharging the concentrate to the mixing container and including at least one piston reciprocating in a further cylinder having inlet means for introducing the concentrate into the further cylinder and outlet means for discharging the concentrate contained in the further cylinder to the mixing container, the piston being coupled with the plunger for reciprocation in accordance with the latter, whereby upon discharge of the main fluid remained in the cylinder by the plunger a predetermined amount of concentrate is discharged by the piston to the mixing container.