Patent ID: 6729501
Filing Date: 2004-05-04
Classification: B05B

Abstract:
A dosing pump for dispensing two or more liquids, gels, slurries and/or pastes and adapted to be connected to two or more liquids, gels, slurries and/or pastes, which comprises an operating button, and two or more liquid, gel, slurry and/or paste dispensing assemblies, each liquid, gel, slurry and/or paste dispensing assembly being in mechanical contact with an actuator, wherein said actuator is in further mechanical contact with said operating button and is simultaneously or nearly simultaneously actuated by movement of said operating button, wherein each liquid, gel, slurry and/or paste dispensing assembly further comprises:a) a dispensing element; b) a cylindrical chamber in flow communication with the dispensing element; c) a piston or bellows sealingly and slidably mounted within said cylindrical chamber; â€ƒhaving a stroke for motion between a rest position and a dispensing position at corresponding opposite rest and dispensing ends of the stroke; d) an inlet valve means in fluid connection with an outlet valve means, wherein said inlet valve means is in fluid connection with a container; and wherein said outlet valve means is in fluid connection with said dispensing element; and wherein said inlet valve means and said outlet valve means are disposed in three plates situated between said corresponding container and said cylindrical chamber, and designated upper, middle, and lower plates, the upper plate being farthest from said containers, the middle plate being intermediate in distance from said containers, and the lower plate being closest to said containers; and wherein said inlet valve means is a trampoline valve situated between said container and said piston or bellow; and wherein said trampoline valve is in open position when said piston or bellows is urged in the direction of the rest position thereby providing fluid communication between said inlet valve means, said cylindrical chamber and said container; thereby drawing by vacuum pressure liquid, gel, slurry and/or paste from said corresponding container to said corresponding cylindrical chamber; and which is in closed position when said piston or bellows is urged in the direction of the dispensing position; and wherein said outlet valve means forms a part of said upper plate, and comprises a vent which is in open position when said piston or bellows is urged in the direction of the dispensing position, and which is in closed position when said piston or bellows is urged in the direction of the rest position thereby providing fluid communication between said cylindrical chamber, said outlet valve means and said dispensing element; thereby dispensing liquid, gel, slurry and/or paste from said dispensing element by mechanical force; wherein two or more containers each comprises: a) a rigid outer layer having a vent therein; b) a thin inner layer adjacent to but not adhesively bonded to said outer layer, wherein said inner layer forms a hermetic seal between said outer layer and said dosing pump; and wherein said inner layer contains said liquid, gel slurry and/or paste, and separates from said outer layer when said liquid, gel slurry and/or paste is suctioned from said two or more containers, said inner layer being collapsed and/or drawn toward said dosing pump.