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Device adapted to deliver fluids, in particular medicines, under pressure, comprising a receptacle 1 of variable volume in a form or shape of a pouch or flexible container of general cylindrical shape with exclusively longitudinal pleats 2 containing the fluid under pressure to be delivered and equi

Device adapted to deliver fluids, in particular medicines, under pressure, comprising a receptacle 1 of variable volume in a form or shape of a pouch or flexible container of general cylindrical shape with exclusively longitudinal pleats 2 containing the fluid under pressure to be delivered and equipped with an actuator C permitting to open a valve 15a, 15b, to enable the aforementioned fluid to be delivered, the whole being located inside a receptacle 4 capable of resisting to an elevated internal pressure, the internal volume of this last receptacle comprised between its wall and the receptacle of variable volume being filled with a neutral gas under a pressure sufficient to exert on the receptacle of variable volume a pneumatic constraint sufficient to permit the delivery of the therein contained fluid when the above-said valve permitting the said delivery is operated by the aforementioned actuator C.

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1. A gas-pressurized device adapted to deliver fluids under pressure, consisting essentially of: an internal receptacle 1 of variable volume in a form or shape of a pouch or flexible container of generally cylindrical shape consisting essentially of: a lower closed extremity E1 andan upper open extr

1. A gas-pressurized device adapted to deliver fluids under pressure, consisting essentially of: an internal receptacle 1 of variable volume in a form or shape of a pouch or flexible container of generally cylindrical shape consisting essentially of: a lower closed extremity E1 andan upper open extremity which is lengthened as prolongation E2, the said receptacle which has no other opening and which is slightly conical in direction of its lower extremity,further comprising pleats 2 which are exclusively longitudinal and which extend from the upper to the lower extremity,an actuator C housed on said internal receptacle, permitting to open a valve to enable the aforementioned fluid to be delivered, the said actuator comprising a mounting cup M comprising a circular external edge or rim M1 and only one concentric circular axial opening 12 by which it is fixed through crimping on the prolongation E2 of the internal receptacle,an external receptacle 4 capable of resisting to an elevated internal pressure which is superior to 20 bars, said external receptacle which is of general cylindrical shape and which comprises a lower closed extremity and an upper extremity comprising a circular opening which is the only opening of the external receptacle, the said opening being demarcated by a circular rim or edge 5 on which is fixed by crimping the external edge M1 of the mounting cup,a pressurized variable volume of neutral gas or air delimited between the internal and the external receptacles, wherein the variable volume of neutral gas or air is under a pressure sufficient to exert on the internal receptacle of variable volume a pneumatic constraint sufficient to permit the delivery of the therein contained fluid when the valve is operated by the actuator,wherein the said internal receptacle comprises no further opening permitting feeding therein the fluid to be delivered and neither the external receptacle nor the mounting cup comprise a further opening permitting filling with air or neutral gas the volume delimited between the internal and the external receptacle,wherein the leak tightness, at the level of the crimping by the concentric circular axial opening 12 of the mounting cup M on the prolongation E2, in a position close to the edge 3 of the opening of the internal receptacle 1, is ensured by a gasket 8 consisting of an elastomeric material, in particular rubber and, at the level of the crimping of same mounting cup M onto the rim or edge 5 of the opening of the external receptacle 4 by a gasket 9 consisting of the same material as gasket 8, or, when the external receptacle (4) is made in a material with sufficient elastic characteristics, without said gasket 9, the crimping of mounting cup M onto the extremity of the prolongation E2 of the internal receptacle 1 being made possible by an external return or edge 10 provided at its extremity. 2. The gas-pressurized device according to claim 1, wherein the internal receptacle 1 is made of polyethyleneterephtalate (PET) or of any other material offering analogous properties and wherein the mounting cup M which is crimped to edge 3 is consisting of aluminum or of tinplate (steel with a coating of tin on each side), the external receptacle 4 being made of aluminum, polyethyleneterephtalate or tinplate. 3. The gas-presurized device according to claim 1, wherein the leak tightness, at the level of the crimping of the mounting cup M on the prolongation E, in a position close to the edge 3 of the opening of the internal receptacle 1, is ensured by a gasket 8 consisting of an elastomeric material, in particular rubber and, at the level of the crimping of same mounting cup M onto the rim or edge 5 of the opening of the external receptacle 4 by a gasket 9 consisting of the same material as gasket 8, the crimping of mounting cup M onto the extremity of the prolongation E2 of the internal receptacle 1 being made possible by an external return or edge 10 provided at its extremity. 4. The gas-pressurized device according to claim 1, wherein the actuator C, which has the form of an actuator button having the general lines of a sleeve in the shape of a hat, which is made of a rigid synthetic material, and includes an axial tube 13 with an internal axial passage 13a, which on the one hand communicates at its upper extremity 13b with a conduit 14 located in the upper part C1 of the actuator and connected to tube 13 and which, on the other hand opens by its lower extremity 13c when it is positioned on the device, in the part E2 of the internal receptacle 1, passing through the opening 12 of the mounting cup M, gasket 8 being arranged in such a way that it also ensures the leak tightness with tube 13, the said actuator C being arranged and secured on the extremity E2 of the internal receptacle 1 due to the arrangement of the tube 13 in the opening 3 of the internal receptacle 1, the extremity 13c of tube 13 applying load onto a valve consisting of an element in the form of a cup comprising a base or bottom 15a and a wall 15b, tube 13 being provided at its extremity 13c with an opening or notch 13d. 5. The gas-pressurized device according to claim 1 wherein, in the closed position under the action of a spring 16 arranged between the base or bottom 15a of a valve and the return or edge 17a of an element 17 in the form of a socket secured inside the end of the extremity E2, the bottom 15a of the valve is pushed against the extremity 13c of tube 13 and the free edge of the wall 15b is pushed against a sealing gasket 8, element 17 comprising an axial passage 17c to ensure communication of the interior of the internal receptacle 1 with the interior of the space delimited by element 17. 6. The gas-pressurized device according to claim 1 wherein the internal and external receptacles 1 and 4 are made of transparent materials. 7. The gas-pressurized device according to claim 1 wherein the internal receptacle 1 and the external receptacle 4 are realized using laminates composed of constitutive layers, wherein at least one of the constitutive layers confers to the laminate sufficient mechanical resistance, while another confers the properties of a barrier to gas, in particular to oxygen, nitrogen and/or carbon dioxide, and while still another layer confers the properties of chemical resistance with respect to the product to be delivered. 8. The gas-pressurized device according to claim 7, wherein: the layer adapted to confer good mechanical resistance is consisting of polyethylene terephtalate or PET,the layer adapted to confer good gas barrier properties is realized in Nylon, especially Nylon MXD6, in ethylene vinyl alcohol resin (or EVOH), or in silicium oxide,the layer adapted to confer good properties of chemical resistance is consisting of polyethylene terephtalate. 9. The gas-pressurized device according to claim 7, wherein the internal receptacle 1 is realized either using a laminate of the PET/Nylon/PET type, which means that it comprises an external layer of polyethylene terephtalate, an intermediate layer of Nylon and an internal layer, intended to be in contact with the fluid to be delivered, of polyethylene terephtalate or using a laminate of a PET/EVOH/PET type, the external receptacle 4 being realized in the same material or in a bi-layer laminate, especially in polyethylene terephtalate and Nylon. 10. The gas-pressurized device according to claim 1 wherein the pleats 2 of the internal receptacle 1 are realized in two steps during the first of which the internal receptacle 1 is provided with rough pleats 21 which are obtained using a mould, the inner surface of the wall of which comprises only longitudinal pleats 20. 11. The gas-pressurized device according to claim 1, comprising a cylindrical sleeve R positioned on receptacle 1, the said sleeve R which is realized in transparent synthetic elastic material, comprising on its internal surface rough pleats 25, each of them being positioned between two pleats 2 of receptacle 1. 12. The gas-pressurized device according to claim 1 wherein the extension E2 comprised by the internal receptacle 1 is equipped with an internal reinforcing collar or sleeve 30 or with an external reinforcing collar or sleeve 31. 13. The gas-pressurized device according to claim 1 wherein at least a part of the extension E2 comprised by the internal receptacle 1 is made of a material resistant tot temperatures from 50 to 55° C. and even higher than 55° C.