Directional control valve for fluid and device for in-situ reconstitution and administering

A directional control valve for fluid that is adapted to make up a solution in situ by mixing two ingredients coming from a first reservoir and from a second reservoir, said valve comprising:

• a body defining an axial chamber and being provided with radial first and second inlet/outlet (I/O) ports designed to be connected to said first reservoir and to a feed pump, and with a radial administering port adapted to enable said solution to exit, said first and second I/O ports and said administering port communicating with said chamber;
• and
• a rotary spool received in said chamber and through which link channels pass, said spool being provided with axial third and fourth I/O ports designed to be connected to said second reservoir and communicating with said link channels, said link channels being arranged to interconnect said first, second, third, and fourth I/O ports and said administering port selectively and for fluid flow, depending on the angular position of the spool relative to said body so that, in a first angular position, they connect said first I/O port to said third I/O port, and close off said second I/O port and said fourth I/O port so that, by means of said feed pump (14), they enable the ingredient to be transferred between said first reservoir and said second reservoir, said valve being characterized in that said link channels are arranged so that:
• in a second angular position, said link channels connect said first I/O port to said third I/O port and connect said second I/O port to said fourth I/O port so that, by means of said feed pump, they enable the mixture to be transferred and blended between said first and second reservoirs;
• and
• in a third angular position, said link channels connect said first I/O port to said administering port, and close off said second I/O port, said third I/O port, and said fourth I/O port so that, by means of said feed pump they enable the resulting solution to be administered.