Patent ID: 6336571
Filing Date: 2002-01-08
Classification: A61F,B65D

Abstract:
A device for packaging a liquid that is to be dispensed drop by drop, comprising a flexible-walled flask (1) that can be deformed manually to gradually decrease its internal volume towards a rigid neck (5) in which is leaktightly mounted a dispensing head (2) ending in a conduit (41) for expelling the liquid out of the flask, characterized in that this device comprises a microporous pad (6) inserted in a body (3) of the said head across the cross-sectional area for the passage of the liquid between said flask (1) and said conduit (41) upstream of a liquid-distribution chamber (31) of large cross-sectional area formed in said body (3) between a downstream surface (63) of said pad (6) and said expulsion conduit (41), said pad (6) being made of a material that is inert with respect to the liquid and capable of creating a head loss which regulates the flow of liquid driven through it by the pressure generated in the flask (1) upon each action to reduce its volume and said distribution chamber (31) having a large enough volume to accommodate the liquid which has passed through said pad (6), said flask (1) being bounded by a wall of cylindrical overall shape in the form of a longitudinally deformable bellows (12) ending in a rigid transverse bottom (13) and being isolated from any possibility of air entering to replace the expelled liquid.