Fluid ejection device with enhanced leaktightness

Details Fluid ejection device with enhanced leaktightness Fluid ejection device with enhanced leaktightness

A - Human Necessities

62

C

A62C 13/66 (2006.01) A62C 35/02 (2006.01)

Patent

CA 2703853

The invention relates to a compact fluid ejection device comprising two chambers (A, B) separated by a piston-type separating part (5). One of the chambers (B) contains the fluid which is to be ejected, the other chamber (A) being a pressurization chamber, the pressurization of which enables the separating part (5) to be displaced and the fluid to be ejected. According to the invention, the pressurization chamber (A) comprises a sock (50) suitable for separating leaktightly the inside of the pressurization chamber (A) from the side walls of the reservoir. Leaktightness between the two chambers is thus total and durable but does not reduce the ease of sliding of the piston (5).

L'invention concerne un dispositif compact d'éjection d'un fluide comportant deux chambres (A, B) séparées par un élément séparateur (5) de type piston. L'une des chambres (B) contient le fluide destiné à être éjecté, l'autre chambre (A) est une chambre de pressurisation dont la mise sous pression permet de provoquer la translation de l'élément séparateur (5) et l'éjection du fluide. Selon l'invention, la chambre de pressurisation (A) comprend une chaussette (50) apte à séparer de manière étanche l'intérieur de la chambre de pressurisation (A) des parois latérales du réservoir. Ainsi l'étanchéité entre les deux chambres est parfaite et durable sans pour autant dégrader la faculté de coulissement du piston (5).

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