Valve and valve cup for pressurized container

Abstract

The valve ( 1 ) for pressurized container includes a valve body ( 10 ) in which are placed a spring ( 20 ), a valve member ( 30 ), and a cup ( 50 ) having a central opening ( 52 ) through which a product outlet rod ( 31 ) can pass, the valve body ( 10 ) being fixed to the inner face ( 54 ) of the cup ( 50 ), the valve seal ( 40 ) being pressed against the cup while surrounding the central opening ( 52 ), and the valve body ( 10 ) being fixed to the inner face of the cup ( 50 ) by welding. The valve cup has an outer face, an inner face, and a peripheral bearing edge ( 51 ) for placing the cup on a can, a descending wall in the continuation of the bearing edge, and a bottom wall between the descending wall and the central opening, which has at least one frustoconical peripheral portion with concave outer face.

1 . Valve cup for pressurized container, having an outer face and an inner face and being provided with
 a peripheral bearing edge for placing the cup on a can,   a central opening for passage of a product outlet rod,   a descending wall in a continuation of the bearing edge, and   a bottom wall between the descending wall and the central opening,   
       wherein the bottom wall comprises at least one frustoconical peripheral portion the outer face of which is concave. 
     
     
         2 . Valve cup according to  claim 1 , wherein the cup is configured to receive a valve body on the inner face of the cup. 
     
     
         3 . Valve cup according to  claim 1 , wherein the bottom wall comprises a flat central portion located between the frustoconical peripheral portion and the central opening. 
     
     
         4 . Valve cup according to  claim 1 , wherein an edge of the bottom wall which surrounds the central opening is in alignment with the frustoconical peripheral portion. 
     
     
         5 . Valve cup according to  claim 1 , wherein an edge of the bottom wall which surrounds the central opening is rolled up, forming a rolled edge. 
     
     
         6 . Valve cup according to  claim 1 , wherein the bearing edge of the cup forms an annular cavity into which the neck of a can can penetrate. 
     
     
         7 . Valve cup according to  claim 1 , wherein a peripheral end of the bearing edge is in the form of a flat ring or of a ring the wall of which is inclined towards the center of the cup. 
     
     
         8 . Valve cup according to  claim 1 , wherein at least the inner face of the cup is made of polymer. 
     
     
         9 . Valve cup according to  claim 1 , wherein at least the outer face of the cup is metallic. 
     
     
         10 . Valve cup according to  claim 1 , wherein reinforcing ribs are provided on at least one face of the cup. 
     
     
         11 . Valve for pressurized container, comprising:
 a valve body in which are placed:
 a spring, 
 a valve member, and 
 a valve seal, as well as 
   a cup having an outer face and an inner face and being provided with a central opening through which a product outlet rod can pass,   the valve body being fixed to the inner face of the cup,   wherein the valve seal is pressed against the cup while surrounding the central opening, and the valve body is fixed to the inner face of the cup by welding.   
     
     
         12 . Valve according to  claim 11 , wherein the inner face of the cup is made of a plastic material, and the valve body is also made of a plastic material. 
     
     
         13 . Valve according to  claim 11 , wherein the cup comprises at least a metallic outer layer and an inner layer in plastic material. 
     
     
         14 . Valve according to  claim 11 , wherein the valve body comprises a tubular body provided with
 at one end, an annular tapered edge, which tapered edge bears sealingly against the valve seal while surrounding the central opening, as well as   a fixing crown by which the valve body is welded to the cup.   
     
     
         15 . Valve according to  claim 11 , wherein the valve body is welded to a portion of the cup which is flat and which extends beyond the valve body. 
     
     
         16 . Valve according to  claim 11 , wherein the central opening of the cup is made in a bottom wall of a cylindrical well, the valve seal being placed against the bottom wall of the cylindrical well. 
     
     
         17 . Valve according to  claim 14 , wherein the central opening of the cup is made in a bottom wall of a cylindrical well, the valve seal being placed against the bottom wall of the cylindrical well, and wherein the end of the valve body provided with the tapered edge penetrates in the cylindrical well, the weld being made between the fixing crown introduced into the well and the bottom wall of the well or between the fixing crown wider than the well and a peripheral section of the cup which surrounds the well. 
     
     
         18 . Valve according to  claim 16 , wherein
 the valve body comprises a tubular body provided with a fixing crown by which the valve body is welded to the cup, and   the valve body is completely outside the well, the weld being made between the fixing crown wider than the well and a peripheral section of the cup which surrounds the well.   
     
     
         19 . Valve according to  claim 11 , wherein reinforcing ribs are provided on at least one face of the cup. 
     
     
         20 . Valve according to  claim 16 , wherein reinforcing ribs are provided on at least one face of the cup, and wherein the reinforcing ribs are provided on the outer face of the cup and are in contact with the outer face of the cylindrical well.