Fluid dispenser having a housing and flexible inner bladder

Details Fluid dispenser having a housing and flexible inner bladder Fluid dispenser having a housing and flexible inner bladder

A - Human Necessities

61

M

A61M 5/175 (2006.01) A61M 5/145 (2006.01) A61M 39/24 (2006.01) A61M 39/00 (2006.01) A61M 39/02 (2006.01)

Patent

CA 2578803

A dispenser for dispensing a fluid includes a rigid vial that has a main fluid chamber containing a fluid, and a pump assembly that is in fluid communication with the main fluid chamber and is configured to dispense a predetermined quantity of fluid from the main fluid chamber. A flexible bladder is provided which is located within the main fluid chamber and is configured to expand to fill the ullage created within the main fluid chamber during dispensing of fluid by the pump assembly. The resilient bladder tends to force itself outwardly toward the rigid vial and, in turn, increases the pressure within the main fluid chamber in comparison to the interior of the bladder to thereby prevent the ingress of air or vapors through the bladder or otherwise into the main fluid chamber.

Distributeur de liquide constitué d'un flacon rigide comprenant une chambre à liquide principale contenant un liquide et d'un ensemble de pompe en communication fluidique avec la chambre à liquide principale et conçu pour distribuer une quantité prédéterminée de liquide provenant de la chambre à liquide principale. Une vessie souple située dans la chambre à liquide principale est conçue pour se dilater et remplir le creux qui se forme dans la chambre à liquide principale pendant la distribution du liquide par l'ensemble de pompe. La vessie élastique a tendance à s'étendre vers l'extérieur en direction du flacon rigide et par conséquent à accroître la pression dans la chambre à liquide principale par rapport à l'intérieur de la vessie, de façon à empêcher l'air ou des vapeurs de s'introduire dans la vessie ou dans la chambre à liquide principale.

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