A method and device for the serial ejection of two fluids...

A - Human Necessities – 61 – M

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A61M 5/28 (2006.01) A61M 5/19 (2006.01) A61M 5/315 (2006.01)

Patent

CA 2704614

A device for the serial ejection of at least two fluid components comprises a spacer (19) providing at least two states, i)a first state allowing a front piston (7) to be displaced forwards by action on a rear piston (17) while a fluid volume is retained in a rear chamber (5) and ii) a second state allowing the rear chamber to volumetrically shrink while fluid is transferred past (or through) the front piston thereby enabling the use of a liquid, initially provided in only the rear chamber, for the dual purposes of mixing and rinsing.

L'invention concerne dispositif pour l'éjection en série d'au moins deux composants de fluide, qui comprend un élément d'espacement (19) procurant au moins deux états, i) un premier état permettant à un piston avant (7) d'être déplacé vers l'avant par une action sur un piston arrière (17) pendant qu'un volume de fluide est retenu dans une chambre arrière (5) et ii) un second état permettant à la chambre arrière de se rétrécir en volume pendant qu'un fluide est transféré au-delà du piston avant ou à travers celui-ci, permettant ainsi l'utilisation d'un liquide, fourni initialement uniquement dans la chambre arrière, dans l'objectif double de mélange et de rinçage.

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