Device and method for creating dry particles

B - Operations – Transporting – 01 – J

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B01J 2/04 (2006.01) A61K 9/14 (2006.01) A61M 15/00 (2006.01) B01D 1/18 (2006.01) B01F 3/04 (2006.01) B01F 5/04 (2006.01) B05B 7/04 (2006.01) B05B 7/06 (2006.01) B05B 7/08 (2006.01) G01N 21/01 (2006.01) B05B 1/02 (2006.01) G01N 15/14 (2006.01)

Patent

CA 2314918

Atomized particles within a desired size range (e.g., 1 micron to about 5 microns) are produced from two immiscible fluids, a first fluid source containing the formulation to be atomized, and a second fluid source which is contained in a pressure chamber surrounding at least the area where the first liquid is to be provided. Upon presentation of the first fluid source to the second, the second fluid is forced out of an opening positioned in front of the flow path of the formulation. The first and second fluids interact dynamically to form a stable capillary microjet, which in turn results in the formation of a focusing funnel at the opening. Formulation passing through this a focusing funnel will atomize upon exiting the opening of the pressurized chamber without physically contacting the perimeter of the opening.

Des particules atomisées, dont la taille se situe dans un intervalle variant par exemple entre 1 et 5 microns environ, sont produites à partir de deux fluides non miscibles, une première source de fluide contenant la formulation destinée à être atomisée, et une seconde source de fluide, contenue dans une chambre sous pression, entourant au moins la zone dans laquelle le premier liquide doit être amené. Une fois la première source de fluide présentée à la seconde, le second fluide est éjecté par l'intermédiaire d'un orifice placé en face de la trajectoire d'écoulement de ladite formulation. Le premier et le second fluides interagissent de manière dynamique de manière à former un microjet capillaire stable, qui engendre la formation d'un entonnoir de focalisation au niveau dudit orifice. La formulation qui traverse cet entonnoir de focalisation sera atomisée après avoir traversé l'orifice de ladite chambre sous pression, sans pour autant entrer physiquement en contact avec le périmètre de cet orifice.

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