Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
  • B05B11/0005—Components or details
  • B05B11/0062—Outlet valves actuated by the pressure of the fluid to be sprayed
  • B05B11/007—Outlet valves actuated by the pressure of the fluid to be sprayed being opened by deformation of a sealing element made of resiliently deformable material, e.g. flaps, skirts, duck-bill valves
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
  • B05B11/0005—Components or details
  • B05B11/0037—Containers
  • B05B11/0039—Containers associated with means for compensating the pressure difference between the ambient pressure and the pressure inside the container, e.g. pressure relief means
  • B05B11/0044—Containers associated with means for compensating the pressure difference between the ambient pressure and the pressure inside the container, e.g. pressure relief means compensating underpressure by ingress of atmospheric air into the container, i.e. with venting means
  • B05B11/00442—Containers associated with means for compensating the pressure difference between the ambient pressure and the pressure inside the container, e.g. pressure relief means compensating underpressure by ingress of atmospheric air into the container, i.e. with venting means the means being actuated by the difference between the atmospheric pressure and the pressure inside the container
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
  • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
  • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
  • B05B11/1001—Piston pumps
  • B05B11/1004—Piston pumps comprising a movable cylinder and a stationary piston
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
  • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
  • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
  • B05B11/1042—Components or details
  • B05B11/1061—Pump priming means
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
  • B05B11/0005—Components or details
  • B05B11/0089—Dispensing tubes
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
  • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
  • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
  • B05B11/1042—Components or details
  • B05B11/1066—Pump inlet valves
  • B05B11/1067—Pump inlet valves actuated by pressure
  • B05B11/1069—Pump inlet valves actuated by pressure the valve being made of a resiliently deformable material or being urged in a closed position by a spring
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
  • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
  • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
  • B05B11/1042—Components or details
  • B05B11/1073—Springs
  • B05B11/1074—Springs located outside pump chambers

Definitions

• Dispensing device comprising a non-return valve with a hard point
• the present invention relates to a device for dispensing a liquid or pasty product to be dispensed, in particular a cream, an ointment or a paste, in particular for cosmetic use.
• the present invention relates to a dispensing device intended to be mounted on an opening of a container containing the product to be dispensed, so that the product exits through a dispensing orifice of the dispensing device passing from the opening of the container and through the dispensing orifice.
• this dispensing device forms a pump with a metering chamber making it possible to dispense a given quantity, corresponding to the volume of this metering chamber and to a dead volume.
• Dispensing devices are known in the prior art to be mounted on the neck of a container containing a liquid or a cream.
• dispensing devices such as that of document FR2848618, comprising two valves: a low valve at the inlet of the metering chamber and a dispensing valve at the level of the dispensing orifice.
• the piston is fixed and the cylinder body mobile.
• the distribution valve is formed by a membrane whose base is fixed and which opens only under the internal pressure of the pump.
• the present invention aims to improve known dispensing devices with two valves, in particular to ensure a better vacuum seal.
• the invention provides a device for dispensing a liquid or pasty product to be dispensed, comprising:
• a cylinder body in which the piston is arranged so as to define a metering chamber between the piston and the cylinder body, the piston comprising at least one upstream opening forming an inlet of the metering chamber, called the inlet metering chamber, and the metering chamber comprising a downstream opening, called the dis- tribution, the cylinder body being movable in sliding along the piston between an extended position and a retracted position,
• an inlet non-return valve provided to open the metering inlet when it is subjected to a negative pressure generated in the metering chamber during the movement of the cylinder body towards its deployed position
• an outlet non-return valve provided to open the dispensing opening when it is subjected to a positive pressure generated in the metering chamber during the displacement of the cylinder body towards its retracted position, so as to allow the dispensing a dose of product to be dispensed through the dispensing opening
• the outlet non-return valve comprises a membrane provided with a sealing lip designed to slide against the internal axial surface of the cylinder body, between an upstream position and a downstream position, in that the inner axial surface of the cylinder body includes a sealing seat adapted to retain the sealing lip axially during a first part of the movement of the cylinder body towards its retracted position, the sealing lip sliding on the seat sealing during a second part of the displacement of the cylinder body towards its retracted position.
• the invention it is possible to combine several incompatible advantages over conventional valve systems. Firstly, optimum vacuum tightness is obtained even when the pressure applied to the outlet non-return valve is subjected to pressures greater than 1 bar. Secondly, the evacuation of the overpressure before the push button is in the low position facilitates, on the one hand, the priming and, on the other hand, reduces the pressing force.
• the device according to the invention is very compact and requires a reduced number of parts. In addition, it is possible to have a very low dead volume and the priming of the pump is facilitated.
• the sealing seat comprises an upstream radial shoulder and a downstream portion forming a ramp in order to facilitate the sliding of the sealing lip towards the upstream;
• the inner axial surface of the cylinder body has a flange, upstream relative to the sealing seat, which axially retains the sealing lip in its upstream position;
• the outlet non-return valve comprises an elastic return member which urges the membrane towards its upstream position in which the sealing lip is located upstream of the sealing seat;
• the elastic return member comprises a base of elastically deformable material which is interposed axially between the membrane and a bottom wall of the cylinder body; [0021] - the base is in the shape of an inverted bell, the base comprising a central portion which is connected to the membrane and an outer peripheral portion which bears against the bottom wall of the cylinder body, and the central portion is mounted axially movable with the membrane between an upstream position, corresponding to the upstream position of the sealing lip, and a downstream position, corresponding to the downstream position of the sealing lip;
• the base is made in one piece with the membrane
• the outlet check valve has an axial extension which cooperates with a tubular housing arranged on the bottom wall of the cylinder body so as to axially guide the membrane between its upstream position and its downstream position;
• the dispensing opening opens into the cylinder body between the free end of the outer peripheral portion of the base and the sealing seat;
• the junction member comprises an annular groove provided to receive an internal tubular portion belonging to the piston, and the annular groove comprises a downstream orifice which is provided to communicate with the opening of the container and an upstream orifice which is provided to communicate with the exterior of the dispensing device;
• the inner tubular portion of the piston comprises an axial skirt capable of deforming inside the annular groove between a tightly closed position in which it obstructs the passage between the downstream orifice and the upstream orifice and a venting position in which it allows air to enter the container via the upstream orifice and the downstream orifice;
• the piston is surmounted by a cylindrical lip making it possible to push the membrane when the cylinder body is in the retracted position.
• FIG. 1 is an exploded perspective view showing a pump-type dispensing device according to the invention intended to equip a container containing a liquid or pasty product to be dispensed;
• FIG. 2 is an axial sectional view along the plane 2-2 which shows the dispensing device according to the invention mounted on the container, before priming the pump;
• FIG. 3 is a view similar to that of Figure 2 which shows an enlargement of the upper part of the dispensing device according to the invention showing the mounting of the outlet check valve in the cylinder body when it occupies an extended position;
• FIG.4 is a view similar to that of Figure 2 which illustrates an operating step after priming of the dispensing device, the metering chamber containing a dose of product to be dispensed and the membrane of the outlet non-return valve occupying its upstream position;
• FIG. 5 is a view similar to that of Figure 4 which illustrates an operating step following the step of Figure 4 in which the membrane occupies its downstream position;
• FIG. 6 is a view similar to that of Figure 4 which illustrates an operating step following the step of Figure 5 in which the outlet check valve occupies its retracted position at the end of the product distribution phase;
• FIG. 7 is a view similar to that of Figure 4 which illustrates an operating step following the step of Figure 6 in which the membrane again occupies its upstream position, at the start raising the cylinder body to its deployed position;
• FIG. 8 is a view similar to that of Figure 4 which illustrates an operating step following the step of Figure 7 in which the vacuum produced in the metering chamber by the displacement of the cylinder body towards its deployed position causes the aspiration of a new dose of product through the inlet non-return valve;
• FIG. 9 is a view similar to that of Figure 3 which shows an enlargement of the lower part of the dispensing device showing a passage for venting the container when the skirt axial position of the piston is in the tightly closed position of the passage;
• FIG. 10 is a view similar to that of Figure 9 which illustrates the venting position of the axial skirt of the piston.
• Figures 1 and 2 illustrate a dispensing device 10, or pump, which is mounted on a container 12 containing a product to be dispensed such as a paste or a liquid, in particular a cosmetic product.
• the dispensing device 10 and the container 12 extend along a main axis Al which here extends in a vertical direction when considering Figures 1 and 2.
• orientation from upstream to downstream considering the direction of flow of the product to be dispensed from the container 12 towards the outlet of the dispensing device 10.
• the orientation from upstream to downstream corresponds here to an orientation from bottom to top along the main axis Al.
• the container 12 is here in the form of a generally cylindrical bottle, with main axis Al, comprising a neck 14 delimiting an opening 16 giving access to the product to be dispensed.
• the neck 14 is here provided with threads 18 allowing assembly by screwing with the dispensing device 10.
• the dispensing device 10 comprises a junction member 20 which is provided with a threaded collar 21 defining an internal thread 22 complementary to the threads 18 of the neck 14.
• the junction member 20 also comprises a tubular main body 24, the flange 21 here being made in one piece with an outer axial wall 26 of the main body 24.
• the dispensing device 10 further comprises a piston 28 which is arranged here inside the main body 24 and which is fixed relative to the main body 24.
• the piston 28 is arranged inside a body cylinder 30 mounted to move relative to piston 28.
• Piston 28 defines in cylinder body 30 a metering chamber 32 which communicates with container 12 through an upstream opening called metering inlet 34 and which communicates with the outside of the device control 10 through a downstream opening called the distribution opening 36, at the outlet of the metering chamber 32.
• the cylinder body 30 is slidably movable along the piston 28 between an extended position, which is shown in Figure 2, and a retracted position, which is shown in Figure 5.
• the dispensing opening 34 is closed off by an inlet non-return valve 38 which is provided to open the metering inlet 34 when it is subjected to a negative pressure generated in the metering chamber 32 by the movement of the cylinder body 30 to its deployed position.
• the dispensing opening 36 is closed off by an outlet non-return valve 40 which is provided to open the dispensing opening 36 when it is subjected to a positive pressure generated in the metering chamber 32 during movement. of the cylinder body 30 to its retracted position.
• the dispensing opening 36 is extended by a dispensing duct 42 which here extends generally transversely relative to the cylinder body 30.
• the piston 28 is here arranged at the upper axial end, or downstream end, of an internal axial wall 44 belonging to the main body 24.
• the internal axial wall 44 of the main body 24 is here substantially parallel to its axial wall external 26.
• the two internal 44 and external 26 axial walls are connected at their lower axial ends, or upstream ends, by a bridge of material 46, and define between them a annular housing 48 capable of receiving in axial sliding at least a lower part of the cylinder body 30.
• an elastic return element 49 here a helical compression spring, is interposed axially between the bridge of material 46 and the end axial upstream of the cylinder body 30, so as to urge the cylinder body 30 downstream, here upwards, in the deployed position.
• the piston 28 here comprises a cylindrical base 50 on which is mounted a tubular seal 52.
• the tubular seal 52 here comprises:
• the piston 28 may include a cylindrical lip 61 on its downstream face.
• This cylindrical lip 61 which is optional, is provided to cooperate with an element of the outlet non-return valve 40 as will be explained later.
• the metering inlet 34 opens here at the center of the cylindrical base 50, through the inlet non-return valve 38.
• a supply pipe 62 is fitted onto the underside of the cylindrical base 50 so as to connect the bottom of the container 12 to the metering chamber 32.
• the inlet check valve 38 can take different forms. It comprises for example an elastically deformable flexible membrane as described in the document FR3063661B1.
• the inlet non-return valve 38 can be made in one piece with the piston 28, for example in an elastically deformable material of the elastomer type.
• the outlet non-return valve 40 comprises a disc-shaped membrane 64 whose diameter is substantially equal to the inside diameter of the cylinder body 30 so as to close an upper end section 65 of the cylinder body 30.
• the metering chamber 32 is thus delimited at the bottom by the piston 28 and at the top by the membrane 64.
• the outer peripheral edge of the membrane 64 forms a sealing lip 66 which bears against the inner axial surface 56 of the cylinder body 30.
• the membrane 64 has an annular groove 68 in its upstream face, close to its outer peripheral edge, which forms a thinning of the membrane 64.
• This annular groove 68 delimits, with a recess 69 formed in the outer peripheral edge, the sealing lip 66 and facilitates the bending of the sealing lip 66 with respect to the rest of the membrane 64. This makes it possible in particular to ensure optimal and continuous sliding of the lip seal 66 on the inner axial surface 56.
• the outlet non-return valve 40 comprises an elastic return member 71 which urges the membrane 64 towards its upstream position illustrated in particular by Figures 2 and 3.
• the elastic return member 71 preferably comprises a base 70 which is interposed axially between the membrane 64 and a bottom wall 76 of the cylinder body 30.
• the base 70 has the overall shape of an inverted bell, that is to say that it widens towards the 'downstream.
• the base 70 here comprises a central portion 72 which is made in one piece with the downstream face of the membrane 64 and which is extended downstream by an outer peripheral portion 74.
• the outer peripheral portion 74 comes into axial support against the bottom wall 76 of the cylinder body 30.
• the outlet non-return valve 40 also comprises, on the downstream side, a tubular axial extension 78 which is received in a tubular housing 80 complementary to the bottom wall 76 so as to guide the membrane 64 axially.
• the free end of the axial extension 78 is provided with a first peripheral bead 82 which cooperates with a second peripheral bead 84 arranged in the tubular housing 80 so as to axially retain the non-return valve of outlet 40 on the bottom wall 76, in a rest position.
• a junction zone 86 located between the central portion 72 and the outer peripheral portion 74 here forms a hinge which allows, by elastic deformation, the sliding of the central portion 72 with respect to the outer peripheral portion 74, between a position axial position, shown in particular in Figure 2, and a downstream axial position, shown in particular in Figure 5.
• the central portion 72 is here guided in axial sliding by the axial sliding of the axial extension 78 in the tubular housing 80.
• the outlet non-return valve 40 comprising the membrane 64, the base 70 and the axial extension 78 is advantageously made in one piece from a sufficiently flexible material to allow elastic deformation of the base 70 at the level of the junction zone 86, and a deformation of the membrane 64 downstream to allow the expulsion of a dose of product to be dispensed through the dispensing opening 36.
• the outlet non-return valve 40 is by example made of an elastomeric material.
• the bottom wall 76 comprises a ferrule 88 on which the outer peripheral portion 74 is fitted, which makes it possible to retain the base 70 on the bottom wall 76, in particular radially.
• the internal axial surface 56 of the cylinder body 30 comprises a sealing seat 90 designed to axially retain the sealing lip 66 downstream.
• the sealing seat 90 is here in the form of a radial shoulder 92 facing upstream.
• the sealing seat 90 extends downstream by a ramp 94 corresponding here to a progressive thinning of the axial wall of the cylinder body 30.
• the internal axial surface 56 of the cylinder body 30 comprises a flange 95, or upstream sealing seat, which is provided to axially retain the sealing lip 66 upstream.
• the rim 95 delimits axially with the sealing seat 90 a groove capable of receiving the sealing lip 66 when the membrane 64 occupies its upstream axial position.
• the membrane 64 is shown in an upstream axial position which corresponds to a rest position, that is to say that the outlet check valve 40 is not deformed, and the sealing lip 66 is received in the groove formed by the flange 95 and the sealing seat 90.
• the membrane 64 is shown in a downstream axial position which corresponds to a retracted position of the membrane 64, that is to say that the outlet check valve 40 is compressed, the central portion 72 having slid downstream.
• the sealing lip 66 is offset axially downstream with respect to the sealing seat 90.
• FIG. 9 there is shown an enlarged annular groove 60 in which the tubular seal 52 is inserted in order to describe a solution for venting the dispensing device 10 and the container 12.
• the bottom of the annular groove 60 is provided with a first orifice, called the downstream orifice 96, in reference to the direction of suction of the air from the outside towards the inside of the container 12, which communicates , downstream, with the interior of the container 12 and, upstream, with the annular groove 60.
• the internal axial wall 44 of the main body 24 comprises a second orifice, called upstream orifice 98 which communicates, downstream, with the annular groove 60 and, upstream, with the housing 48.
• the upstream orifice 98 is here arranged close to the bottom of the annular groove 60.
• the dispensing device 10 may comprise several downstream orifices 96 and/or several upstream orifices 98. These orifices may, for example, be distributed circumferentially around the main axis Al.
• the internal tubular portion 58 of the tubular seal 52 ends upstream, here downwards, with a thinned free end section forming an axial skirt 100.
• the axial skirt 100 is provided to occupy a position closure, which is shown in Figure 9, in which it bears against a bottom wall of the annular groove 60, and a venting position, which is shown in Figure 10, in which it frees a passage between the downstream orifice 96 and the upstream orifice 98.
• the axial skirt 100 In its closed position, the axial skirt 100 is in sealed contact with the bottom wall of the annular groove 60, so as to obstruct any air passage or product between the downstream orifice 96 and the upstream orifice 98.
• the axial skirt 100 In its venting position free, the axial skirt 100 is elastically deformed inwards, that is to say towards the main axis Al, under the effect of a flow of air which enters the container through the downstream orifices 98 and upstream 96.
• the venting position corresponds to an operating phase of the dispensing device 10 which will be explained later.
• Figure 4 illustrates the dispensing device 10 after the pump has been primed, a dose of product being already contained in the metering chamber 32.
• the cylinder body 30 occupies its position extreme downstream, that is to say its deployed position.
• the two non-return valves 38, 40 are closed, the pressure in the metering chamber 32 and the pressure in the container 12 being substantially equal to the pressure outside the dispensing device 10, typically equal to atmospheric pressure.
• the cylinder body 30 behaves relative to the main body 24 and the piston 28 like a push button. Also, to cause the dispensing of the dose of product through the outlet opening 36, it is necessary to exert an axial pressure on the bottom wall 76, directed upstream, against the return force elastic produced by the elastic return element 49.
• the sealing lip 66 comes into axial abutment against the sealing seat 90.
• the sealing seat 90 thus creates a "hard point” at pass in the displacement of the cylinder body 30. It is therefore necessary to exert a force of sufficient intensity on the cylinder body 30 to pass the "hard point".
• the sealing lip 66 slides on the sealing seat 90 while moving axially downstream with the membrane 64 until the membrane 64 occupies its downstream position illustrated in FIG. 5. This displacement of the membrane 64 towards its downstream position is permitted by the deformation of the base 70 at the junction zone 86, the central portion 72 moving axially downstream relative to the outer peripheral portion 74.
• the pressure exerted by the dose of product contained in the metering chamber 32 on the membrane 64 is such that the latter ends up bending by deforming elastically, leaving thus pass the dose of product between the sealing lip 66 and the internal axial surface 56 of the cylinder body 30, as illustrated by FIG. 6.
• the arrow F1 illustrates the path of the product to be dispensed from the metering chamber 32 to the dispensing duct 42 through the dispensing opening 36.
• the inlet non-return valve 38 remains closed, as does the axial skirt 100 which occupies its closed position.
• the outlet non-return valve 40 begins by resuming its initial configuration, with the sealing lip 66 passing the sealing seat 90 in the opposite direction, in particular by sliding on the ramp 94, until it occupies the axial position illustrated in FIG. 7, which corresponds to a closed position of the outlet non-return valve 40.
• the cylinder body 30 then continues its axial movement downstream, causing a depression in the metering chamber 32.
• the sealing lip 66 then comes to rest on the rim 95 forming the lower sealing seat, preventing thus the opening of the sealing lip 66 upstream under the depression in the metering chamber 32.
• This depression causes the opening of the inlet valve 38 thus allowing the product to be sucked through the intake pipe.
• the cylinder body 30 finally reaches its extreme downstream position, or extended position, which is illustrated in Figure 4, in which the dispensing device is ready to dispense a new dose of product.
• the axial skirt 100 In this deployed position, the axial skirt 100 returns to its closed position.
• the dispensing device 10 has the advantage of being able to withstand a pressure in the metering chamber 32 greater than 1 bar, with a vacuum seal that does not require locking.
• the pumps must remain sealed when they are subjected to a pressure difference vis-à-vis the outside: depression (in an airplane or in the mountains) or pressure on the bottle (increase in the temperature of the bottle or pressure of other items during shopping for example).
• the classic validation test is a vacuum at -800 mbar.
• Mechanical valve pumps have this sealing function but at the cost of significant pressure drops and additional parts.
• deformable valve (diaphragm) pumps do not have this function and must have an additional locking device (static by back pressure or movable when locking).
• the invention combines the performance of the mechanical valve and the simplicity of the membrane valve.
• the configuration of the outlet non-return valve 40 with the sealing seat 90 makes it possible to reinforce the sealing of the metering chamber 32.
• the sealing objective of the outlet non-return valve 40 is to obtain watertightness under vacuum at -800 mbar. This is made possible in particular by the use of a double axial and radial seal at the level of the sealing lip 66 with the sealing seat 90 which represents a hard point to pass and therefore a certain force to guarantee the -800 mbar of depression.
• the arrangement of the axial skirt 100 with the upstream 96 and downstream 98 orifices allows both good sealing of the container 12 and venting to the open air when filling the metering chamber 32 so as to avoid that the container 12 collapses on itself under the effect of the pressure differential between the inside of the container 12 and the outside.
• the dispensing device 10 requires a very small number of parts (5 parts) which makes it possible in particular to minimize the total weight of the device.
• the dispensing device 10 also has the advantage of to minimize the dead volume, that is to say the stroke of the cylinder body 30 before dispensing product, and to allow very easy priming during the first dispensing of product.
• the dispensing device 10 according to the invention can be used with standard container necks 12.
• Al main axis of the container and of the dispensing device

Applications Claiming Priority (2)

Publications (1)

Family

ID=73699032

Family Applications (1)

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Family Cites Families (5)

• 2020
  • 2020-09-29 FR FR2009901A patent/FR3114575B1/fr active Active
• 2021
  • 2021-08-27 US US18/188,351 patent/US20240009692A1/en active Pending
  • 2021-08-27 WO PCT/FR2021/051496 patent/WO2022069808A1/fr active Application Filing
  • 2021-08-27 EP EP21777573.3A patent/EP4221900A1/de active Pending
  • 2021-08-27 CN CN202180052241.9A patent/CN115916418A/zh active Pending

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