Patent ID: 6626328
Filing Date: 2003-09-30
Classification: A61M,B05B

Abstract:
A media dispenser comprising:a base having a first base part and a second base part, being movable relative to each other; a pump assembly disposed on said second base part and movable relative to said second base part, said pump assembly having an inlet and an outlet, the inlet being provided with a piercing member; a reservoir housed in said base and having a first medium chamber and a second medium chamber, for containing first and second media, respectively, said reservoir also having a first piston and a second piston, the first medium chamber being bounded by the first piston and the second piston, both of said first piston and said second piston being arranged to be shifted in said reservoir, and the second medium chamber being bounded by the second piston and a diaphragm arranged to be pierced by said piercing member on a shifting and piercing stroke in order to connect the second chamber with the pump assembly; a valve, disposed between the first chamber and the second chamber, said valve being opened upon shifting of the second piston, thereby opening a flow path between the first chamber and the second chamber and allowing mixing of the first and second media; and interlocking members positioned on the first base part and the second base part to engage and secure the first base part and the second base part to each other upon completion of a shifting and mixing stroke of the first base part relative to the second base part which causes the opening of the valve and the mixing of media from the first medium chamber and the second medium chamber.