Assembly For Dispensing An Aerosol Comprising An Improved Area For Contact With A Neck Of A Container

Abstract

A dispensing assembly which is intended for being mounted in a neck of a container containing the fluid. The dispensing assembly includes an annular sealing shoulder intended for engaging with a complementary annular edge of the neck, and an annular bearing surface extending axially from the sealing shoulder. The annular bearing surface defines an annular contact area with a constriction of the neck, and separates, from a main space of the vessel, an annular isolated space extending between the sealing shoulder and the annular contact area. The annular bearing surface includes at least one recess intended for interrupting the circumferential continuity of the annular contact area and for forming a fluid passage between the main space and the isolated space.

1 . An assembly for dispensing a fluid forming an aerosol which is designed to be fitted in a container neck containing the fluid, of the type comprising:
 an annular sealing shoulder which is designed to cooperate with a complementary annular edge of the neck; and   an annular support surface which extends axially from the sealing shoulder, and is designed to define an annular area of contact with a constriction of the neck, this annular contact area being designed to separate an annular isolated space, which extends between the sealing shoulder and this annular contact area, from a main space of the container,   characterized in that it comprises at least one recess provided in the annular support surface which is designed to interrupt the circumferential continuity of the annular contact area, and to form a passage for fluid between the main space and the isolated space.   
     
     
         2 . The dispensing assembly as claimed in  claim 1 , characterized in that the base of the recess is substantially parallel, on a radial plane, to the annular support surface. 
     
     
         3 . The dispensing assembly as claimed in  claim 1 , characterized in that the recess extends in a manner which is inclined relative to a radial plane of the annular support surface. 
     
     
         4 . The dispensing assembly as claimed in  claim 3 , characterized in that the inclination is progressive. 
     
     
         5 . The dispensing assembly as claimed in  claim 1 , characterized in that the recess is formed by at least one section of a circumferential groove. 
     
     
         6 . The dispensing assembly as claimed in  claim 1 , characterized in that the recess extends from a first axial end of the annular support surface, to a second axial end of this annular support surface. 
     
     
         7 . The dispensing assembly as claimed in  claim 1 , characterized in that the recess extends from a first axial end of the annular support surface to a second axial end of this annular support surface, without reaching this second axial end. 
     
     
         8 . The dispensing assembly as claimed in  claim 1 , characterized in that the recess extends between a first axial end of the annular support surface and a second axial end of this annular support surface, without reaching either of these ends. 
     
     
         9 . The dispensing assembly as claimed in  claim 1 , characterized in that the recess has a generally longitudinal form with a width which is variable axially. 
     
     
         10 . The dispensing assembly as claimed in  claim 1 , comprising a ring for arrangement of the dispensing assembly in the container, this arrangement ring being delimited radially by inner and outer surfaces, with the outer surface forming the annular support surface which is designed to define the area of annular contact with the constriction of the neck, and the inner surface delimiting a receptacle for means which form a measuring valve. 
     
     
         11 . The dispensing assembly as claimed in  claim 10 , characterized in that the sealing shoulder is formed by an annular seal, with the arrangement ring having a cross-section in the general shape of a “U” and comprising a radially inner wing which defines the inner surface, and a radially outer wing which defines the outer surface, and is provided with a free end which is in sealed contact with the seal. 
     
     
         12 . The dispensing assembly as claimed in  claim 10 , characterized in that the free end of the outer wing of the arrangement ring is provided with an annular recess extension with a profile which assists its penetration into the seal. 
     
     
         13 . The dispensing assembly as claimed in  claim 11 , characterized in that the thickness of the outer wing is substantially constant, such that the recess which is provided in the support surface corresponds both to a recess in the outer surface of the outer wing, and to a projection on an inner surface of this outer wing. 
     
     
         14 . The dispensing assembly as claimed in  claim 1 , characterized in that the annular support surface is substantially frusto-conical. 
     
     
         15 . The dispensing assembly as claimed in  claim 1 , characterized in that the annular support surface comprises a plurality of recesses distributed regularly around the axis of this annular support surface. 
     
     
         16 . A device for dispensing a fluid which forms an aerosol comprising an assembly for dispensing a fluid forming an aerosol fitted in a container neck which contains the fluid, characterized in that the dispensing assembly is as claimed in  claim 1 . 
     
     
         17 . The dispensing assembly as claimed in  claim 9 , wherein the width which is variable axially increases towards the sealing shoulder. 
     
     
         18 . The dispensing assembly as claimed in  claim 12 , characterized in that the thickness of the outer wing is substantially constant, such that the recess which is provided in the support surface corresponds both to a recess in the outer surface of the outer wing, and to a projection on an inner surface of this outer wing. 
     
     
         19 . The dispensing assembly as claimed in  claim 14 , wherein the annular support surface diverges as it approaches the sealing shoulder.