Measuring cap for a container that can house a pressurized fluid, and container provided with one such cap

Abstract

The invention relates to a measuring cap ( 1 ) for a pressurised container ( 2 ), comprising: a body ( 8 ) having an axial fluid channel ( 12 ), shaped in order to be inserted into the container ( 2 ) through the neck ( 5 ); a sealing joint ( 15 ) shaped bear on a portion of the body ( 8 ); an assembly ring ( 16 ) which is used for removably securing the measuring cap ( 1 ) to the container ( 2 ) and which is removable; and a closure member ( 17 ) for selectively closing and opening the fluid outlet channel ( 12 ).

1 . Measuring cap for a pressurised receptacle able to contain a fluid, the receptacle comprising a bottom and a substantially cylindrical lateral wall that narrows towards a neck having a front neck face and an internal neck edge, characterised in that it comprises:
 a body with a longitudinal axis having:
 a penetrating part, which is conformed so as to enter the neck of the receptacle and comprises a radial peripheral protrusion able to engage in abutment against the internal edge of the neck, 
 an emerging part, with an axial fluid passage communicating with the inside of the receptacle and communicating with the outside of the receptacle through a fluid outlet passage, 
 a sealing shoulder at the junction between the penetrating part and the emerging part, 
   a sealing joint, conformed so as to bear on the sealing shoulder and on the front neck face,   an assembly ring able to be fixed removably to the emerging part of the body while axially clamping the first sealing joint against the front neck face and against the sealing shoulder, and   a closure member able to selectively close and open the fluid outlet passage, controlled by an operating member accessible on the emerging part of the body.   
     
     
         2 . Measuring cap according to  claim 1 , wherein the radial peripheral protrusion has a frustoconical portion the cone angle α of which corresponds substantially to the inclination of the internal edge of the neck of the receptacle. 
     
     
         3 . Measuring cap according to  claim 1 , wherein the penetrating part comprises at least one recessed lateral face defining a width less that the diameter (D) of the neck of the receptacle. 
     
     
         4 . Measuring cap according to  claim 3 , wherein said at least one lateral face is positioned so that it allows a slight local deformation of the neck that generates a leakage beyond a predetermined pressure inside the receptacle. 
     
     
         5 . Measuring cap according to  claim 1 , wherein it is produced from metal or plastics material. 
     
     
         6 . Measuring cap according to  claim 5 , wherein the metal is stainless steel or an aluminium alloy. 
     
     
         7 . Measuring cap according to  claim 1 , wherein the assembly ring is fixed to the body by screwing, pressing or coffering. 
     
     
         8 . Measuring cap according to  claim 1 , wherein the assembly ring has a peripheral skirt surrounding the neck of the receptacle, leaving a leakage space (E) between its end edge and the lateral wall of the receptacle. 
     
     
         9 . Measuring cap according to  claim 1 , wherein the closure member is a rod mounted so as to slide in the axial fluid passage between a closure position (P 1 ) and an open position (P 2 ), and comprises two annular grooves receiving annular closure joints. 
     
     
         10 . Measuring cap according to  claim 1 , wherein the closure member is a locking screw that can be actuated by screwing or unscrewing in the body. 
     
     
         11 . Measuring cap according to  claim 10 , wherein the closure member also comprises a closure element positioned in the axial fluid passage close to the neck of the receptacle and held distant from the latter by a spring or by the internal pressure of the receptacle. 
     
     
         12 . Receptacle able to contain a pressurised fluid, wherein it is closed by a measuring cap according to  claim 1 , wherein its initial internal pressure is greater than 20 bar.