Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D83/00—Containers or packages with special means for dispensing contents
  • B65D83/14—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant
  • B65D83/44—Valves specially adapted therefor; Regulating devices
  • B65D83/48—Lift valves, e.g. operated by push action
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D83/00—Containers or packages with special means for dispensing contents
  • B65D83/14—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant
  • B65D83/16—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant characterised by the actuating means
  • B65D83/20—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant characterised by the actuating means operated by manual action, e.g. button-type actuator or actuator caps

Definitions

• the present invention relates to a control valve for the diffusion of a product contained in an aerosol can to be propelled out of it by the action of a propellant gas, miscible or not of said product, released by action on a diffuser.
• the present invention relates to a control valve for the diffusion of a product contained in an aerosol can and propelled out of it by the action of a propellant gas, miscible or not with said product, released by action on a Streamer.
• the current valves intended for such types of aerosols are produced from a hollow vertical rod forming a piston with vertical action and in the bottom of which rod opens a horizontal lateral hole forming the aforementioned connecting passage.
• hair spray for example, the drying of the stagnant product at the bottom of the hollow cavity of the rod, causes partial or total blockages of the horizontal product outlet orifice modifying the product flow.
• valves Other types of valves called “female valves" are used more particularly in certain sectors where it is necessary to prevent the product from drying out in the diffusion channels between two uses, that of paint for example and make it possible to sink the diffuser in the valve allowing, if necessary, to remove it for cleaning or rinsing. Very often, it is stipulated to return the aerosol after use, to purge the diffuser thus mounted on the valve, by pressing it until the gas outlet alone.
• the present invention aims to remedy these drawbacks while adapting to existing diffusers and cans.
• a control valve for the diffusion of a product contained in an aerosol can under the pressure of a propellant gas characterized in that it comprises a cylindrical rod of which an upper section comprises on at least a generator, a groove for the passage of the product suitable for bringing into communication by deformation of sealing means, under the effect of an action on a sheath open at its two ends and in which said upper section is engaged, the internal volume of the can with an upper end of said sheath communicating with a diffusion channel of a diffuser constituting a control of the action valve on said sheath.
• connection passage between the internal volume of the can and the open air makes it possible to avoid the abovementioned resurgence problems since the volume of the groove can be reduced up to five times compared to the volume of the known and aforementioned hollow rods .
• valve according to the invention is easily adaptable to different operating modes, for example depending on the type of active product and / or the type of propellant used.
• the valve advantageously comprises an auxiliary piston housed in leaktight sliding in a corresponding axial well of said cylindrical rod and capable of sliding in a central chimney which includes the upper end of said sheath, under the effect of the pressure of the product upon actuation of the valve, against elastic return means under the effect of which the upper end of said auxiliary piston constituting a needle closes said diffusion channel.
• Such embodiment allows clogging the grooves of the valve between two spraying thereby avoiding any product drying problem active even in applications in paint spraying.
• said auxiliary piston comprises on at least one generator, a regulating groove with progressive section widening downwards, so as to delimit with a rod internal annular protruding into said chimney in which it slides, a passage of variable section depending on the pressure of the propellant gas remaining in the container, the pressure influencing the relative vertical position of the auxiliary regulating piston with respect to said annular rod by action against one of said elastic return means.
• a valve is thus obtained allowing a constant flow of active product throughout the use of the packaging.
• the section of said regulating groove of the regulating piston progressively increases from top to bottom, so that the lower the pressure, the less the regulating piston is driven down, and the more the passage section which it offers at the level of said rod internal is important.
• auxiliary piston consists of a cylindrical pin housed in sealed sliding in said axial well corresponding to said rod and a cylindrical axis capable of sliding in said central chimney of the sleeve, the upper end of said axis constituting said needle obturation at rest of said end of the diffusion channel;
• said upper section of said cylindrical rod further comprises on its upper edge at at least a second groove for the passage of said product communicating on the one hand with said first groove and on the other hand with an upper zone of the well delimited by said pin of the regulating piston;
• - Said regulating groove defines a generally hollow trunk-pyramidal volume
• - Said regulating groove defines a generally conical trunk hollow volume
• auxiliary piston is obtained in one piece by molding.
• said upper shaft of said auxiliary piston can advantageously be obtained by molding independently of said pin and reported in a cavity corresponding thereof by force fitting.
• the demolding of the axis containing the regulating groove can be carried out easily, the groove emerging through its largest section at the bottom of the axis.
• said upper section of said upper rod is full and comprises on its upper edge a second furrow for the passage of said product communicating on the one hand with said first furrow and on the other hand with a chimney formed in said upper end of said sheath, itself in communication with the diffusion channel of said diffuser.
• said chimney of said sheath comprises a housing for receiving a sealing ball, said ball being free in its housing to close said rest chimney and to free the passage to the product under the effect of pressure.
• Said sealing means consist of an annular seal on an upper face which bears a lower end of said sleeve suitable for causing an axial deformation of said seal and thus allowing the release of a lower end of said first groove by its communication with the internal volume of the container, said cylindrical rod comprising at a lower end of said upper section an annular shoulder bearing at rest, under the effect of elastic return means on a lower face of said seal sealing;
• said cylindrical rod has a lower section engaged in said shell and of larger section than the section of said upper section, said annular shoulder being formed by the change of section between said lower and upper sections of said cylindrical rod;
• Said lower section of the cylindrical rod comprises an annular concentric housing delimiting an axial rod for guiding one end of a spring constituting said elastic return means of the cylindrical rod, of which another end is supported on a bottom of the shell .
• valve according to the invention associating a sheath and a cylindrical rod provided with a groove makes it particularly easy to produce packaging corresponding to any type of application with optimized operation.
• the auxiliary piston can, if desired, always be molded with the regulating groove, the choice between the automatic regulation function or simple closing being done by changing the imprint of the lower part of the chimney of the sleeve to save or not the internal annular ring.
• Figure 1 is an axial sectional view of a valve according to the invention, in the inactivated position.
• FIGS. 1A and 1B show different embodiments for obtaining a cylindrical rod according to the invention.
• Figure 2 is an axial sectional view of a valve in the inactivated position, according to an improved embodiment, incorporating an automatic flow control according to the invention.
• Figure 3 is a view of a valve according to Figure 2, in the activated position.
• Figure 4 is a perspective view of a valve member according to Figures 2 and 3 constituting an auxiliary control piston.
• Figure 5 is a cross section along the line IV-IV of figure 4.
• Figure 6 is an axial sectional view of a valve with integrated regulation, according to an alternative embodiment of the auxiliary piston.
• Figure 7 is an axial sectional view of an alternative embodiment of a valve according to the invention.
• the product diffusion device 1 designated as a whole in FIG. 1 comprises a control valve 2, object of the present invention, to allow the propulsion of a product 5 contained in a container 6 by means of a gas propellant, miscible or not with said product.
• the gas is released by a vertical manual action in the direction F, on a diffuser 3 known per se, associated in control with a cylindrical rod 4 of the valve 2. This action has the effect of causing the opening or closing of a connecting passage of the valve 2, to communicate the internal volume of the container 6 with the diffuser.
• the T-dji sposi • (ti • • f 1 ⁇ contains é '* t gaTlemen djes fastening means of the valve 2 at the upper end of the bottle 6, is effected by crimping on the neck 7 of bottle 6 , which crimping makes it possible to include in fixing a hollow shell 8 plunging inside the enclosure of the container 6 and a seal 9. The latter is pinched between an upper peripheral rim 10 of the shell 8 and a flange radial 11 of neck 7.
• the valve 2 according to the invention is constituted, according to a first embodiment, shown in Figure 1, by a cylindrical rod 4 and full, housed in a hollow sheath 12 also cylindrical open at its two ends 13 and 14. Its end upper 13 receives by clamping the diffuser 3 including a diffusion channel 15 communicates with a chimney 16 of said sheath 12, while its other end 14 comes to bear on the upper face of the seal 9, near its internal peripheral edge to cause it to deform in a direction going from top to bottom, during 'an axial action on the diffuser 3, hence on the sheath 12 and consequently on the rod 4 bearing on a peripheral shoulder 17 of said sheath 12.
• Such action on the seal 9 allows the passage of the product 5 between the underside of the seal 9 and a shoulder 18 of the rod 4 hermetically supported one on the other until then.
• Such an action is carried out against an elastic return member 22 disposed in compression between a bottom 19 of the shell 8 and a lower section 20 of the rod 4 extending inside the shell 8 to to be guided.
• This lower section 20 is extended by a rod 24 hollowed out by an annular concentric housing 21, in which an end of the elastic return member 22 of the rod 4 is positioned.
• the connecting passage between the internal volume of the container 6 and the open air passing through the diffusion channel 15 and the chimney 16 of the sleeve 12, is constituted by a longitudinal groove 23 formed on one or more generators of an upper section 29 of rod 4.
• the lower end 23a of said groove 23 is capable of opening freely into the shell 8 at the opening, by an axial thrust on the rod 4 in the direction F, causing the aforementioned deformation of the seal 9 and consequently the passage of the product under pressure and this according to a section imposed by the very dimensions of the groove 23 and determined for optimum regulation of the flow rate of the product 5.
• the vertical groove 23 is extended at its upper part by another groove 25, horizontal, formed diametrically on the upper face 4a of the rod 4, bearing on the internal shoulder 17 of the sleeve 12, and in communication with the upper central chimney 16 of the sleeve 12, in communication itself with the diffusion channel 15 so as to constitute a continuous passage between the internal volume of the shell 8 opening into the container 6 and the diffuser 3 during the release of the product 5, upon opening.
• a ball 26 can be engaged in a seat 27 formed at the upper end of said chimney 16, to act as an insulating closing valve. the furrows and the chimney of the open air between two sprays.
• the axial drive of the rod 4 is carried out by contacting the shoulder 17 of the sleeve 12 on the upper face 4a (FIG. 1A) of the rod 4 and also by tightening said sleeve 12 bearing on the lateral surface of the rod 4, of course excluding the groove 23, formed in the hollow. Such tightening also serves to hold the parts together and also for easy assembly.
• FIGS. 1A and 1B show that it is possible to obtain various sections of passage of the groove 23 by modifying only its lower part 23a, 23a ′, by having an interchangeable imprint during molding corresponding to a section 28 of the rod 4.
• FIGS. 2 and 3 represents an alternative embodiment of a valve 2A which is particularly improved, since it allows optimum regulation of the flow of product 5 to be obtained, automatically by means acting inversely proportional to the prevailing pressure. in the container 6 at the time of use and created for example by an immiscible gas, acting by compression.
• This device essentially differs from the previous one by these regulatory means. Consequently, only these will be described below, as well as the modifications made to the elements previously described.
• These regulation means are constituted by an auxiliary piston 30 for automatic regulation constituted by a cylindrical pin 31 slidably housed in a corresponding axial well 33 of the upper section 29A of the rod 4A against a return spring 3 compressed between the bottom 35 of the well 33 and a peripheral shoulder 36 of the pin 31 located in its lower zone.
• the pin 31 is extended at its upper part directed towards the diffuser 3 by an axis 32 also cylindrical capable of sliding in the central chimney 16A of the sleeve 12A and comprising a groove 37 with progressive section widening downwards, formed as above on at least one generator of the upper axis 32 of the auxiliary piston 30 so as to delimit with the internal wall of the chimney 16A in which it slides and more precisely with an annular rod 39 projecting from the lower part of the chimney 16A of the sheath 12A surrounding the axis 32 of the piston 30 at a minimum height, a passage of variable section depending on the pressure of the gas remaining in the canister 6.
• This pressure directly influences the relative vertical position of the axis 32 of the piston 30 in the chimney 16A, by direct action of the gas on a flange 38 of said piston 30 situated below the level of the upper face of the rod 4A and constituting a sealing lip tightness, to drive the auxiliary regulator piston 30 more or less down against the return spring 34.
• the stroke of the regulating piston 30 will directly influence the position of the groove 37 relative to the internal annular ring 39 of the chimney 16A, with which it delimits the passage section, which will therefore be inversely proportional to said pressure.
• the greater the pressure the more the piston 30 will be pushed back down by compressing the spring 3 ⁇ and the rod 39 of the chimney 16A, will be opposite the upper part of the groove 37 of small section, thus limiting the debit.
• the piston 30 is slightly pushed back, and the rod 39 of the chimney 16A is located opposite the bottom, widest part of the groove 37 to provide a large passage section at a flow at low pressure.
• the groove 37 defines a hollow volume generally pyramidal trunk or conical trunk.
• the upper end of the axis 3 of the regulating piston 30 constitutes a needle 40 capable of being positioned in a seat of the chimney 16A or as shown in a seat surrounding the end of the diffusion channel 15 of the diffuser 3 so that in the rest position of - Î5 - the assembly, said needle 40 acts as a valve for closing the furrows and the chimney.
• the auxiliary regulation piston 30 is obtained in one piece by molding as shown in FIGS. 2 and 3, but to facilitate demolding requiring a key to avoid damaging the groove 37 during demolding, the upper axis 32 of the regulating piston 30 can be obtained by molding independently of the pin 31, then attached to a corresponding cavity thereof, by force fitting (fig. 6).
• the container 6 contains a liquefied gas miscible with the product 5 to be diffused and therefore the shell communicates with the internal volume of the container 6 by a nozzle 42.
• the second embodiment illustrated by FIGS. 2 and 3 is more particularly intended for a container 6 containing a compressed gas immiscible with the product 5 to be diffused.
• the shell 8 communicates with the internal volume of the container 6 by a dip tube 43 extending as close to the bottom of the container.
• FIG. 7 shows an embodiment differing from the previous ones essentially in that the sheath 12B does not have an internal annular ring 39.
• the grooves 23A and 23B of the cylindrical rod 4A are directly and freely in communication with the chimney 16B sheath 12B.
• the regulation function which is not necessary is eliminated.
• the advantage of such a solution is to allow the use of the same elements whatever the mode of propulsion of the product.
• the invention is in no way limited by the features which have been specified in the foregoing or by the details of the particular embodiments chosen to illustrate the invention. All kinds of variants can be made to the particular embodiments which have been described by way of examples and to their constituent elements without thereby departing from the scope of the invention. The latter thus includes all the means constituting technical equivalents of the means described as well as their combinations.

Landscapes

• Chemical & Material Sciences (AREA)
• Dispersion Chemistry (AREA)
• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=9414093

Family Applications (1)

Country Status (3)

Families Citing this family (1)

Family Cites Families (2)

• 1991
  • 1991-06-21 FR FR9107605A patent/FR2678913B1/fr not_active Expired - Fee Related
• 1992
  • 1992-06-17 WO PCT/FR1992/000545 patent/WO1993000276A1/fr not_active Application Discontinuation
  • 1992-06-17 EP EP92913150A patent/EP0590013A1/de not_active Withdrawn

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events