Pressure regulating device for a pressurised dispensing vessel

B - Operations – Transporting – 65 – D

Patent

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Details

B65D 83/14 (2006.01) B65D 83/28 (2006.01) A61M 15/00 (2006.01)

Patent

CA 2472145

A pressure regulating device (10) for regulating pressure in a pressurised dispensing vessel (12), the device (10) comprising a cartridge (15) for storing pressurised fluid; the cartridge (15) being sealed by a cap assembly (20) having an expandable chamber and a flow passage and an actuating means in the cap assembly (20) to open and close the flow passage and an actuation means in the cap assembly (20) to actuate the closure member, wherein the actuation means operates fin response to expansion of the expandable chamber; and a one-way valve (24) communicating the expandable chamber with the interior of the dispensing vessel (12) vi an aperture (40) in the cap assembly (20), the valve (24) having a resilient chamber seal (35) in the expandable chamber extending across the aperture (40) and restrained by chamber wall so to allow fluid to enter through the aperture (40) and past the seal (35) to charge the chamber to a predetermined pressure difference below the pressure in the dispensing vessel, and wherein expansion of the chamber occurs when the pressure in the dispensing vessel (12) is lower than the pressure in the chamber.

L'invention concerne un dispositif (10) de régulation de la pression destiné à réguler la pression dans un récipient de distribution comprimé (12). Ledit dispositif (10) comprend une cartouche (15) destinée à stocker du liquide comprimé. Ladite cartouche (15) est fermée par un ensemble bouchon (20) présentant une chambre extensible, un passage pour le flux, ainsi que des moyens d'activation dans l'ensemble bouchon (20) servant à ouvrir et fermer le passage du flux, en réponse à l'expansion de la chambre extensible. Ledit dispositif comprend également un clapet de non retour (24) faisant communiquer la chambre extensible avec l'intérieur dudit récipient de distribution (12) par l'intermédiaire d'un orifice (40) dans l'ensemble bouchon (20), ledit clapet (24) présentant un orifice de fermeture amovible de la chambre (35) dans la chambre extensible le long de l'ouverture (40) et il est retenu par la paroi de la chambre de façon à permettre au liquide d'entrer à travers l'orifice (40) et de passer l'orifice de fermeture (35) pour charger la chambre, à une différence de pression prédéterminée en dessous de la pression mesurée dans le récipient de distribution. L'expansion de la chambre se produit lorsque la pression dans le récipient de distribution (12) est plus faible que la pression dans la chambre.

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