Patent ID: 8505774

Claim:
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 E 1 and an upper open extremity which is lengthened as prolongation E 2 , 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 M 1 and only one concentric circular axial opening 12 by which it is fixed through crimping on the prolongation E 2 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 M 1 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 E 2 , 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 E 2 of the internal receptacle 1 being made possible by an external return or edge 10 provided at its extremity.