Method and system for precise dispensation of a liquid

B - Operations – Transporting – 01 – L

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B01L 3/02 (2006.01) B67D 7/08 (2010.01) B67D 7/30 (2010.01) G01F 11/28 (2006.01)

Patent

CA 2524178

Devices, systems, and methods for the precise dispensation of small volumes of liquids are presented. A fluid microdispenser comprises a liquid-filled tube, an actuator coupled to the tube, and a tip at one end of the tube. When the actuator applies an actuation pressure, a precise volume of liquid is ejected from the orifice of the tip. The orifice is manufactured to control the volume of liquid ejected by each actuation and, therefore, may have a diameter smaller than that of the liquid-filled tube. The invention comprises systems, methods, and devices so that the inner diameter of the liquid-filled tube is decreased (tapered) to that of the orifice so as to maximize transmission to the orifice of the pressure generated by the actuation stimulus. This enables the volume of liquid ejected by each stimulus to be reproducibly controlled by the amplitude of the actuation stimulus.

La présente invention concerne des dispositifs, des systèmes et des procédés de distribution précise de petits volumes de liquides. Un microdistributeur de liquide comprend un tube rempli de liquide, un actionneur couplé au tube, ainsi qu'une pointe située à une extrémité du tube. Lorsque l'actionneur applique une pression d'actionnement, un volume précis de liquide est expulsé de l'orifice de la pointe. L'orifice est conçu pour commander le volume de liquide expulsé par chaque actionnement et, par conséquent, peut présenter un diamètre inférieur à celui du tube rempli de liquide. Cette invention concerne des systèmes, des procédés et des dispositifs selon lesquels le diamètre interne du tube rempli de liquide décroît jusqu'à celui de l'orifice, de façon à maximiser la transmission à l'orifice de la pression produite par le stimulus d'actionnement. Ceci permet de commander de manière reproductible le volume de liquide expulsé par chaque stimulus, au moyen de l'amplitude du stimulus d'actionnement.

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