Dispensing aerosol valve for pressurized container, dispensing adapter therefor, and assembly of a pressurized container with an adapter

Abstract

A pressurized aerosol container is disclosed. The aerosol container includes a specific valve and a dispensing adapter to be used therewith for dispensing a pressurized liquid contained in the container. The liquid is preferably a moisture reactive composition. The valve has a valve stem provided with a central bore having an internal threaded portion, which allows the fixing and connection of a disposable dispensing adapter and has a connecting end provided with a mating outer threaded portion.

1 . A valve stem for a tilting valve or gun valve in an aerosol type dispensing can, said valve stem comprising:
 (a) a hollow tubular portion defining a central bore extending along a central axis from a first open end opening to ambient atmosphere to a second, opposite end being closed by   (b) a circular end base of diameter greater than the diameter of the valve stem,   (c) at least one opening located on a wall of the tubular portion adjacent the end base and connecting the central bore with ambient, and   (d) fixing device in the form of a thread suitable for receiving and gas tightly fixing a dispensing adapter provided with a mating thread,   
       wherein, said fixing device is a screw thread defined by a continuous helical groove on the inner surface of the central bore of the valve stem. 
     
     
         2 . The valve stem according to  claim 1 , wherein the groove has a tapered cross-section parallel to the central axis, preferably, said cross section having a substantially trapezoidal or triangular geometry. 
     
     
         3 . A valve stem according to  claim 2 , wherein the tubular portion further comprises an external trunco-conical flange with the sloping face thereof facing towards the first open end. 
     
     
         4 . A pressurized container comprising a dispensing valve, said valve comprising:
 (a) a grommet made of a resilient material, forming a seal between the container and,   (b) a valve stem according to  claim 3 ,   
       wherein the seal between the grommet and valve stem can be disrupted by tilting and/or pressing the valve stem. 
     
     
         5 . The pressurized container according to the  claim 4 , further comprising an external threaded portion on a can structure suitable for gas tightly fixing thereon a dispensing gun, said threaded portion being preferably provided on an insert fixed to a can cup. 
     
     
         6 . The pressurized container according to  claim 5 , containing a liquid reactive with moisture, such as a polyurethane precursor. 
     
     
         7 . A dispensing adapter suitable for being connected to the dispensing valve of a pressurized container according to  claim 6 , said adapter comprising:
 (a) a hollow dispensing tube with a first, dispensing end and a second, connecting end,   (b) actuating device fixed transverse to the dispensing tube and allowing the actuation of the valve when in place,   
       wherein, the second, connecting end of the dispensing tube comprises an external thread suitable for engaging into the internal thread of the valve stem of a container according to  claim 6  and for gas tightly fixing said adapter to said stem into a position suitable for actuating the valve with said actuating device. 
     
     
         8 . The dispensing adapter according to  claim 7 , further comprising a gripping device fixed transverse to the dispensing tube substantially opposite the actuating device, a second end of said gripping device being suitable for gripping a flange of a pressurized container while the second connecting end of the dispensing tube is screwed on the dispensing valve of said container. 
     
     
         9 . The dispensing adapter according to  claim 8 , wherein the dispensing tube is not straight and the orientation of the first, dispensing end can preferably be varied. 
     
     
         10 . A kit of parts for dispensing a liquid out of a pressurized container comprising:
 (a) a pressurized container comprising a dispensing valve, said valve comprising:
 a grommet made of a resilient material, forming a seal between the container and a valve stem according to  claim 1 , 
 wherein the seal between the grommet and valve stem can be disrupted by tilting and/or pressing the valve stem; 
   (b) a dispensing adapter suitable for being connected to the dispensing valve of the pressurized container, said adapter comprising:
 a hollow dispensing tube with a first, dispensing end and a second, connecting end, and 
 an actuating device fixed transverse to the dispensing tube and allowing the actuation of the valve when in place, 
 wherein, the second, connecting end of the dispensing tube comprises an external thread suitable for engaging into the internal thread of the valve stem of the pressurized container and for gas tightly fixing said adapter to said stem into a position suitable for actuating the valve with said actuating device; 
 such that the internal thread of the valve stem mates the external thread of the second connecting end of the adapter. 
   
     
     
         11 . The kit of parts according to  claim 10 , wherein the tubular portion of the valve stem further comprises an external trunco-conical flange with the sloping face thereof facing towards the first open end and the dispensing adapter comprises a mating surface allowing the formation of a tight seal with the stem valve when the second connecting end of the adapter dispensing tube is screwed on the stem valve. 
     
     
         12 . The kit of parts according to  claim 10 , wherein the dispensing adapter is suitable for being connected to the dispensing valve of the pressurized container, said adapter comprising:
 (a) a hollow dispensing tube with a first, dispensing end and a second, connecting end,   (b) actuating device fixed transverse to the dispensing tube and allowing the actuation of the valve when in place,   wherein, the second, connecting end of the dispensing tube comprises an external thread suitable for engaging into the internal thread of the valve stem of the pressurized container and for gas tightly fixing said adapter to said stem into a position suitable for actuating the valve with said actuating device   and a lever is formed to facilitate actuation of the valve, said lever consisting of a fixed point formed by the gripping point between the container's flange and the adapter's gripping device and extending to the actuating device, with the second, connecting end of the dispensing tube being located between these two points.   
     
     
         13 . The kit of parts according to  claim 10 , wherein the container contains a liquid reactive to moisture, such as a polyurethane precursor. 
     
     
         14 . A method for dispensing a liquid out of a pressurized can, comprising the following steps:
 (a) providing a kit of parts according to  claim 10 ;   (b) screwing the external thread of the dispensing adapter onto the internal thread of the valve stem,   (c) pressing with the fingers the actuating device of the dispensing adapter by hand with the dispensing end thereof oriented towards a target, and   (d) dispensing the liquid onto the target.   
     
     
         15 . A valve stem according to  claim 1 , wherein the tubular portion further comprises an external trunco-conical flange with the sloping face thereof facing towards the first open end. 
     
     
         16 . A pressurized container comprising a dispensing valve, said valve comprising:
 (a) a grommet made of a resilient material, forming a seal between the container and,   (b) a valve stem according to  claim 1 ,   
       wherein the seal between the grommet and valve stem can be disrupted by tilting and/or pressing the valve stem. 
     
     
         17 . The pressurized container according to  claim 16 , further comprising an external threaded portion on a can structure suitable for gas tightly fixing thereon a dispensing gun, said threaded portion being preferably provided on an insert fixed to a can cup. 
     
     
         18 . The pressurized container according to  claim 16 , containing a liquid reactive with moisture, such as a polyurethane precursor. 
     
     
         19 . A dispensing adapter suitable for being connected to the dispensing valve of a pressurized container according to  claim 16 , said adapter comprising:
 (a) a hollow dispensing tube with a first, dispensing end and a second, connecting end,   (b) actuating device fixed transverse to the dispensing tube and allowing the actuation of the valve when in place,   
       wherein, the second, connecting end of the dispensing tube comprises an external thread suitable for engaging into the internal thread of the valve stem of a container according to  claim 16  and for gas tightly fixing said adapter to said stem into a position suitable for actuating the valve with said actuating device. 
     
     
         20 . The dispensing adapter according to  claim 19 , wherein the dispensing tube is not straight and the orientation of the first, dispensing end can preferably be varied.