Controlled discharge device associated with a device for pressurized distribution of fluid in a container

Abstract

The controlled discharge device includes a discharge vent which opens out firstly into an area for distribution of pressurised fluid, and secondly into a closed enclosure with an upper wall comprising a discharge aperture which is surrounded by an upper seat for a discharge locking valve; and a discharge locking valve comprising a weighty valve in a discharge locking valve guide comprising a guide duct with a lower end which communicates with the discharge vent, and an upper end which is coaxial to the upper seat.

1 . A controlled discharge device which is associated with a device for distribution under pressure of fluid in a container, the controlled discharge device comprising:
 a discharge vent which opens out firstly into an area for distribution of pressurised fluid, and secondly into a closed enclosure with an upper wall comprising a discharge aperture which is surrounded by an upper seat for a discharge locking valve;   a discharge locking valve which is arranged in the enclosure below the upper seat of the discharge locking valve, and is controlled by a level of fluid in the discharge vent,   wherein the discharge locking valve comprises a weighty valve which is fitted such as to slide between a high position and a low position in a discharge locking valve guide comprising a guide duct with a lower end which communicates with the discharge vent, and an upper end which is coaxial to the upper seat of the discharge locking valve, and in that the discharge locking valve is fitted in the guide duct with play which creates a loss of load sufficient for the discharge locking valve to be thrust back in the manner of a piston by fluid which penetrates into the enclosure via the discharge vent.   
     
     
         2 . The device according to  claim 1 , further comprising a short-circuit duct which extends in parallel with the guide duct, and has a lower end which opens out below the discharge locking valve and an upper end which opens out above the discharge locking valve, when the latter is in the low position. 
     
     
         3 . The device according to  claim 2 , wherein the short-circuit duct has a volume which is larger than a volume swept by the discharge locking valve between the low position and the high position. 
     
     
         4 . The device according to  claim 2 , wherein the short-circuit duct is delimited by a notch in a side of the discharge locking valve guide, and a lateral wall of the enclosure. 
     
     
         5 . The device according to  claim 1 , wherein the discharge locking valve comprises a ball, and the guide duct comprises a bore with a diameter larger than that of the ball. 
     
     
         6 . The device according to  claim 5 , wherein the discharge locking valve guide comprises a bore which is coaxial to the guide duct, extending below the guide duct and delimiting together with the latter a lower seat for the discharge locking valve. 
     
     
         7 . The device according to  claim 2 , wherein the short-circuit duct opens out below the lower seat of the discharge locking valve according to a bore with a diameter which is at the most equal to the diameter of the lower seat. 
     
     
         8 . The device according to  claim 5 , wherein the ball has a course (d) which is smaller than a radius of the ball. 
     
     
         9 . The device according to  claim 1 , further comprising a calibrated valve which is fitted between the discharge locking valve and the aperture for dispelling into the open air. 
     
     
         10 . The device according to  claim 9 , wherein the discharge vent is connected to an aperture for introduction of fluid, which aperture is equipped with a non-return valve. 
     
     
         11 . The device according to  claim 6 , wherein the short-circuit duct opens out below the lower seat of the discharge locking valve according to a bore with a diameter which is at the most equal to the diameter of the lower seat.