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
  • B05B11/01—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
  • B05B11/1038—Pressure accumulation pumps, i.e. pumps comprising a pressure accumulation chamber
  • B05B11/104—Pressure accumulation pumps, i.e. pumps comprising a pressure accumulation chamber the outlet valve being opened by pressure after a defined accumulation stroke
• • 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
• • 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
  • B05B11/0064—Lift valves
  • B05B11/0067—Lift valves having a valve seat located downstream the valve element (take precedence)
• • 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
  • B05B11/1043—Sealing or attachment arrangements between pump and container
  • B05B11/1046—Sealing or attachment arrangements between pump and container the pump chamber being arranged substantially coaxially to the neck of the container
  • B05B11/1047—Sealing or attachment arrangements between pump and container the pump chamber being arranged substantially coaxially to the neck of the container the pump being preassembled as an independent unit before being mounted on 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
  • B05B11/1042—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
  • B05B11/01—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
  • B05B11/1064—Pump inlet and outlet valve elements integrally formed of a deformable material
• • 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

• 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 for dispensing a given amount, corresponding to the volume of this metering chamber.
• These devices comprise parts forming a pump, in particular a cylinder body fixed relative to the container and a piston descending in this cylinder body.
• a central duct extends longitudinally inside the piston and the rod which drives it in displacement.
• One end of this conduit is connected to the metering chamber at the piston; the other end is connected at the top of the rod to an additional conduit leading to a product dispensing orifice.
• the actuation of the piston by a push button thus allows the product present in the metering chamber formed between the bottom of the cylinder body and the bottom of the piston, through the central conduit, to be discharged to the dispensing orifice.
• the piston moves in direction Conversely, a depression is created, causing the product to be drawn into the metering chamber.
• the presence of check valves at the inlet of the metering chamber and its outlet allows the product is well discharged in the direction of the dispensing orifice when the piston down and sucked up when it goes up.
• dispensing devices with three check valves: a first at the inlet of the metering chamber, a second at the outlet of the metering chamber and a third, called dispensing valve, at the level of the dispensing orifice.
• This dispensing valve is intended to close the dispensing orifice and protect the product, especially the cream, against bacterial contamination or against drying it between two uses.
• This dispensing valve nevertheless has a certain resistance to opening in order to prevent low pressure from opening it, and thus to avoid unintentional openings.
• dispensing devices such as that of the document WO2013001 193A1, comprising only two valves: a bottom valve at the inlet of the metering chamber and a distribution valve at the dispensing orifice. They therefore do not include an intermediate valve at the level of the dosing outlet.
• the communication spaces are filled with air. It is necessary to purge them of this air to fill them with liquid.
• One or more movements back and forth must then be performed with the piston.
• the piston expels air from the metering chamber to these communication spaces, within which the air is compressed, until the pressure is sufficient to open the dispensing valve.
• the air then exits the dispensing device, which closes once the air is exhausted and the pressure becomes insufficient to keep the dispensing valve open.
• the piston goes up sucking a certain amount of product into the container through the bottom valve. The operation is renewed if necessary until the complete purging of the air.
• One solution may be to reduce the resistance of the distribution valve but this increases the risk of accidental distribution and / or contacting the outside air and the liquid contained in the communication spaces, which may be inconvenient for certain products. for example when they oxidize easily in the air.
• FR2848618 discloses devices with two valves, the manual pump is reversed, namely that it is the piston which is fixed and the movable cylinder body.
• the non-return valve forms a single piece with the piston.
• This valve indeed forms part of the piston.
• This part forms a cap, whose annular skirt ensures the lateral sealing of the piston.
• the bottom of the cap comprises a central opening cooperating with a stud formed at the top of the rigid base of the piston, so as to open or close the inlet in the metering chamber. Or the sealing of this check valve can be improved.
• the technical problem that the invention aims to solve is therefore to improve the priming of a dispensing device, especially when its dosing chamber has a small volume, for example between 0.15 and 0.4 milliliters (ml ).
• a first object of the invention is 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 metering inlet; and the metering chamber comprising an outlet, said metering outlet, the cylinder body being slidably movable along the piston between an extended position and a retracted position,
• an inlet check valve mounted on the piston and comprising an inlet membrane having a concave shape
• the piston comprising a first portion and a second portion forming a seal fitted or molded around at least a portion of the first portion, said seal reinforcing the seal between the piston and the side wall or walls of the cylinder body, the piston and the inlet check valve forming separate parts and being arranged in a manner:
• the inlet membrane is tight-tight with the top of said seal and closes the dosing inlet
• the concave shape of the inlet diaphragm elastically deforms and opens the metering inlet when it is subjected to a negative pressure generated in the metering chamber during movement of the cylinder body to its deployed position.
• a valve separate from the piston, in particular from its second part.
• the inlet non-return valve is fixed on the piston with a prestressing seal between the piston and the non-return valve, which makes it possible to keep a sealing tightness permanently at rest, namely when the cylinder body does not move, or when moving the cylinder body to the retracted position, or end position, regardless of the position of the dispensing device when from this displacement to the retracted position.
• the non-return valve and the second part of the piston are both designed to ensure a seal. Therefore, the tight seal between the seal and the valve is more effective, moreover with the prestressing mentioned in the previous paragraph.
• this valve and this seal may each be formed of a flexible material, compared to the first part of the piston made of a rigid material.
• the valve material and the seal material may be identical.
• this synergy makes it possible to reduce the risks of occurrence of priming problems. This improves the pressure increase in the system during priming, thus making it possible to compensate for the presence of dead volumes and thus to use dosing chambers of smaller volume.
• the dispensing device can form a hand pump.
• the metering chamber is defined between the top of the piston and the top of the metering chamber.
• the inlet check valve is mounted on the piston vis-à-vis the top of the metering chamber.
• the deployed position corresponds to a position in which the top of the metering chamber is remote from the inlet check valve and the piston.
• the retracted position corresponds to a position in which the top of the metering chamber is closer to the inlet check valve than in the deployed position, including the top of the dosing chamber being against the inlet non-return valve.
• the concave shape of the inlet membrane is deformed so as to generate a restoring force of the membrane against the top of the piston, so as to maintain a tight clamping constraint;
• the dosing inlet is arranged in communication with a passage opening of the connecting member for receiving the liquid from the container;
• the dispensing device comprises a dispensing orifice in communication, in particular via communication spaces, with the dispensing outlet;
• the first part of the piston comprises a central duct in communication on one side with the liquid and on the other with the dosing inlet, the inlet check valve is sealingly assembled to the piston with a dimensional clamping preload given by the concave shape of the inlet diaphragm which results in fluidic sealing, to air and liquids; by dimensional clamping preload means a clamping made so that once the valve is placed on the piston, it undergoes a deformation, here at its concave shape, with respect to the shape of this concave shape when she suffers no constraint; this concave form is thus prestressed;
• the inlet check valve loses its seal with the piston and the diaphragm elastically deforms from a negative pressure difference between the inside of the metering chamber and the outside of the dispensing device less than - 20 mbar; thus, this seal is broken by an elastic deformation of the membrane, from a very small pressure difference, which allows to let the fluids into the metering chamber;
• the inlet membrane has the shape of a cup whose edge, hereinafter input cup edge, defines the periphery of the concave shape, the concave shape being opposite the inlet of dosage and the inlet cup edge being arranged around the dosing inlet, the inlet cup edge being supported under elastic stress against the top of the seal during said tight fitting, namely when the cylinder body is stationary or moves to the end position, and the inlet cup edge deviating from the top of the piston upon negative pressure in the metering chamber; the Applicant has found that such a shape made it easy to have good results for maintaining the seal, including during the increase of the pressure in the metering chamber;
• the seal comprises a central opening delimited by a flared surface and inside which the dosing inlet is arranged, this central opening widening from upstream to downstream, the inlet non-return valve being mounted of so that, during said sealing, the inlet cup edge is supported above and against this flared surface; this reinforces the support in tight constraint; this flared surface can be conical; -
• the inlet check valve comprises a central portion fixed to the top of the piston, the membrane being arranged around this central portion; this type of valve is well adapted to cooperate in more uniform tight sealing on the seal;
• the upper part of the first part of the piston comprises clipping lugs, between which is clipped the central portion, the or the dosing inputs being formed (s) between these clipping lugs and the clipped portion of the central portion; this allows a realization and a simple mounting of the valve and the inlet (s) dosing;
• the clipping lugs comprise a convex upper portion whose convexity is arranged vis-à-vis the concavity of the concave shape; this makes it possible to avoid a risk of overturning the diaphragm while tightening and reinforcing the latter;
• the piston is mounted in a tubular portion of the connecting member; this facilitates the realization of the piston in two parts, in particular when the seal formed by the second part is overmolded on the first;
• the stroke of the piston is less than the length of the joint; this allows the seal not to exceed the bottom of the portion of the cylinder body in contact with the product to be dosed; this reduces the risk of product leakage out of the dosing chamber;
• the top of the metering chamber forms a top wall
• the dosing outlet is formed inside the top wall
• this covering is carried out on the entire top wall;
• the inlet non-return valve or the inlet check valve and the piston are arranged to match the shape of the surface of the top wall, retracted position; this makes it possible to perfectly cover the top wall and to expel all the air inside the metering chamber;
• the inlet non-return valve or the inlet non-return valve and the piston have faces facing the top wall, these faces being of complementary shape to the shape of at least the portion the surface of the root wall that includes the dosing outlet; it is an embodiment for the recovery of at least the portion of the top wall in which this outlet is located, and therefore to further expel the air from the metering chamber during priming; according to some variants, the shape is complementary to the whole of the top wall, thus allowing the air to be completely expelled;
• the top wall comprises an annular groove arranged vis-à-vis the inlet non-return valve, so that in the end position of the concave shape of the inlet membrane is housed in the annular groove; there is thus a shape adapted to the input membrane;
• the dosing outlet is arranged in the annular groove; the air is thus more effectively removed during priming, the membrane pushing the air to a portion that it marries;
• the inlet check valve covers only a central sector of the piston, the piston having a peripheral sector arranged around the central sector and vis-à-vis the top wall, the latter having a peripheral zone arranged around the annular groove and vis-à-vis the peripheral sector, the peripheral zone coming into contact with the peripheral sector in the end position; this allows the friction against the or the side walls of the metering chamber only with the piston; the peripheral area may be formed by a lip;
• the dispensing device comprises an outlet check valve arranged between the metering outlet and the dispensing orifice, so as to clear the passage between the metering outlet and the dispensing orifice under the exercise of a pressure increase on this outlet check valve; this makes it possible to ensure closure of the dispensing device when the cylinder body moves from its end-of-travel position to its deployed position; -
• the dispensing device comprises only two valves: the inlet check valve and the outlet check valve; it is a simple device to achieve;
• the outlet check valve is mounted at the dosing outlet, on the cylinder body and outside of it; thus, the outlet check valve closes the dosing chamber directly;
• the dispensing orifice may be arranged immediately after or a little further by being connected by conduits forming additional communication spaces; it is a simpler mode that can be used for a product with little risk of contamination, for example, when the liquid itself includes preservatives and / or antibacterial agents;
• the outlet check valve comprises an outlet membrane having a concave shape able to deform elastically so that:
• the outlet membrane when the outlet membrane is subjected to a negative pressure generated in the metering chamber during the displacement of the cylinder body towards its extended position, the outlet membrane closes the metering outlet while being in tight sealing with the top of the body of the cylinder, the concave shape of the outlet membrane being deformed so as to generate a restoring force of this membrane against the top of the cylinder body, so as to maintain a tight clamping constraint, and
• the outlet check valve is thus fixed to the cylinder body with a sealing preload, which makes it possible to keep a tightness of seal permanently during the displacement of the cylinder body towards the deployed position, whatever the position of the dispensing device during this movement, and thus reduce the risk of occurrence of priming problems, by a new air inlet into the metering chamber; this improves the pressure increase in the system during priming;
• the outlet check valve loses its seal with the top of the cylinder body and the membrane of outlet is elastically deformed from a pressure difference between the inside of the metering chamber and the outside of the dispensing device greater than 20 mbar; this reduces the risk of inadvertent opening of the dispensing device;
• the inlet check valve and / or the outlet check valve are molded in a flexible material with a Shore A hardness of between 30 and 90, in particular a thermoplastic elastomer (also called TPE, for "Thermo Plastic Elastomer”); " in English) ; this allows to generate a restoring force to maintain a good seal in the absence of voluntary action on the cylinder body, without requiring a great effort by the user wishing to prime or distribute the product;
• TPE thermoplastic elastomer
• the membrane of the inlet non-return valve and / or the outlet check valve has a thickness of between 0.15 and 0.3 millimeters (mm); the combination of this and the preceding paragraph optimally provides a flexibility of the elastic membrane which allows a good sealing tightness and deformation with a small pressure difference to let the fluids through this combination of a very thin thickness of this membrane with very flexible materials, especially of the TPE type;
• the inlet check valve and / or the outlet check valve comprise a central portion, the membrane of the corresponding non-return valve or the membranes of these non-return valves being arranged around this central portion, this or these membranes extending generally transversely to the direction of sliding of the cylinder body along the piston; the inlet membrane and / or, as the case may be, the outlet membrane are thus circumscribed in a transverse circle, respectively favoring the recovery of the metering inlet and / or the dosing outlet; in cases where the summit forms a top wall, it is also possible to improve the recovery of the top wall in a large part; in particular the top wall is mainly covered by the inlet membrane;
• the central portion of the inlet check valve is fixed by clipping inside the piston; this allows a good retention of the non-return valve, while easily and homogeneously conferring the clamping preload of the inlet membrane on the top of the piston; a fluidic sealing is thus permanently achieved; indeed, the curved shape of the membrane of the inlet check valve ensures the spring function of the flexible membrane and maintains a constant clamping stress on the piston;
• the central portion of the outlet check valve is clipped into the inside of the top of the cylinder cops, the output membrane being arranged outside thereof; this allows a good retention of the non-return valve, while easily and homogeneously conferring the clamping preload of the outlet membrane on the top of the cylinder body; thus permanently fluidic sealing is achieved, the curved shape of the membrane of the inlet check valve ensuring the spring function of the flexible membrane and to maintain a constant clamping stress on the cylinder body;
• the inlet membrane comprises an upper flank vis-à-vis the top wall and a lower flank vis-à-vis the piston, said flanks being separated by a wafer, in particular circular, and conferring on the membrane of its concave shape, the upper flank being convex and the concave lower flank, the concave shape of the inlet membrane thus being a form of annular gutter around the central portion;
• the outlet valve may have one, more or all of the shape characteristics of the inlet valve
• the outlet check valve can be arranged to close or open the dispensing orifice; here we ensure a closure of all communication spaces; this makes it possible to avoid contact between the liquid and the air in the dispensing device; it is a way to be used with a product sensitive to contamination bacterial, for example when the liquid itself is devoid of preservatives and / or antibacterial agents;
• the outlet check valve consecutively comprises:
• an elastically deformable bowl membrane connected to the shutter o optionally, an auxiliary return member, in particular adapted to the low pressures soliciting closure of the shutter, and
• the outlet check valve being arranged so that the face of the vessel membrane outside the vessel is in fluid communication with a communication space connecting the dispensing orifice and the dosing outlet, so that on the one hand the tank membrane is biased by the product during the actuation of the cylinder body to said retracted position, so as to cause the disengaging the shutter of the dispensing orifice, and secondly the tank membrane is urged in the opposite direction during a negative pressure in the metering chamber, thus reminding the shutter in a closed position of the dispensing orifice;
• the tank membrane is susceptible to being deformed by the product during the actuation of the cylinder body towards its end position, so as to cause the release of the shutter of the dispensing orifice;
• this tank makes it possible in particular to avoid untimely openings of the valve, in particular at low pressures, that is to say less than 2 bars, and in particular at pressures lower than 0.4 bars;
• the auxiliary return member is arranged axially inside the hermetic tank, in permanent connection with the vessel membrane, and comprises two elastically deformable stages according to different characteristics, the first stage maintaining a permanent value return force predetermined against said membrane, and therefore the shutter, the second stage being interposed between the first stage and the bottom of the tank, and maintaining a restoring force greater than that of the first stage, acting only when the diaphragm tank is solicited; the first and second stages come from a central core;
• the first stage extends radially around the central core forming a cup whose outer edge is supported on the inner wall of the vessel, the cup being of an elastic material; there is thus a spring element with a hinge of the core to recall the shutter to the dispensing orifice;
• the second stage extends axially from the central core, forming a bell whose outer edge bears on the bottom of the tank, this bell being made of an elastic material and being capable of deforming and exerting a return force only when the cell membrane is stressed;
• the dispensing device comprises a dispensing head mounted integral with the cylinder body and comprising a housing whose walls comprise the dispensing orifice and an orifice in communication with the metering chamber, the outlet nonreturn valve being arranged inside the housing, so as to define an upper volume sealed on one side by the cell membrane, the upper volume having as an opening the dispensing orifice and an orifice in communication with the metering chamber;
• the dispensing device comprises an attached tube mounted in the passage opening of the connecting member for communicating with the opening of the container, so that the lower end of the tube forms the inlet of the product in the dispensing device;
• the tube has an internal section chosen so that when the cylinder body moves towards its deployed position, the depression in the metering chamber is greater than or equal to 8 mbar;
• the tube has an internal section of a diameter at least 20% smaller than that of the passage orifice
• the tube extends below the passage opening
• the dispensing device comprises a reduction ring is arranged inside the upper volume between and away from the vessel membrane and the dispensing orifice and against portions of the inner wall of the housing surrounding the shutter, the reducer having a reduced passage within which the shutter is slidably mounted away from the walls of this reduced passage, the vial diaphragm having a diameter greater than that of the reduced passage; so we limits the dead volume in the dispensing head while extending the surface of the membrane on which a fluid pressure can be exerted;
• the joining member forms a receptacle housing the piston and the cylinder body
• this receptacle has a bottom for closing the open end of the container
• the junction member comprises a tubular portion extending longitudinally between a first end communicating with this passage orifice and a second end on which the piston is mounted, the metering inlet being in communication with the tubular portion;
• the junction member comprises a shaft extending, in particular longitudinally, from the bottom of the receptacle and around the tubular portion, the cylinder body, the tubular portion and the barrel being arranged so that the wall or walls side of the cylinder body slide between the tubular portion and the barrel; this improves sliding guidance;
• the side wall or walls of the cylinder body extend between the top wall and an open end, the latter having a peripheral bulge projecting on the external surface of this open end, the diameter of the cylinder body between this bulge and the wall; summit being adjusted to the inside diameter of the barrel, so that at the approach of the deployed position a radial pressure is generated between the bulge and the top of the inner face of the barrel; this allows to create a seal at the end of the race on the outside of the end of the side wall or walls;
• the dispensing device comprises a coil spring arranged longitudinally and around the barrel, the spring being supported on one side against the bottom of the receptacle and the other against a fixed abutment assembly fixed relative to the body of cylinder; this allows a maintenance of the spring and prevents the risk of buckling of the latter; the spring and the barrel are arranged in such a way that the barrel guides the turns of the spring during its compression or expansion; this facilitates the actuation of the cylinder body and its return to the deployed position;
• the piston comprises an upper peripheral lip in contact with the lateral wall or walls of the cylinder body; this makes it possible to improve the tightness of the metering chamber;
• the piston comprises a lower peripheral lip in contact with the lateral wall or walls of the cylinder body; this makes it possible to block liquid that could have passed between the top of the piston and the side wall or walls;
• the piston comprises two parts: a first part comprising a central duct communicating on one side with the liquid and on the other with the dosing inlet, and a second part forming a seal fitted or molded around at least a portion of the first portion, said seal reinforcing the seal between the piston and the side wall (s) of the cylinder body;
• the dispensing orifice is formed in a push button comprising a communication between the dispensing orifice and the metering outlet, the push button being fixedly mounted on the cylinder body, in particular telescopically in the junction member.
• Another subject of the invention is a packaging assembly of a liquid or pasty product to be dispensed, said assembly comprising:
• a dispensing device set up at the open end of the container, so that a passage opening of the connecting member communicates with the interior of the container.
• This packaging set is thus ready to be filled or filled and ready for use.
• FIG. 1 is an exploded view of an example of a dispensing device according to a first embodiment, corresponding to an example of a first embodiment of the invention
• FIG. 2 to 7 show different phases of the priming step and the first distribution of the liquid by the dispensing device of Figure 1;
• FIG. 8 is a view from below of the base of the cylinder body of the device of FIG. 1;
• FIG. 9 is a perspective view from above of the inlet nonreturn valve of the metering chamber of the application device of FIG. 1;
• FIG. 10 is a bottom perspective view of the valve of the figure
• FIG. 1 1 is a perspective view from above of a portion of the piston of the device of Figure 1;
• FIG. 12 is a perspective view from above of another part of the piston of the device of FIG. 1;
• FIG. 13 is a top view of the connecting member of the application device of Figure 1;
• FIG. 14 is an exploded view of an example of a dispensing device according to a second exemplary embodiment, corresponding to an example of a second embodiment of the invention.
• Figure 15 shows a vertical sectional view of Figure 14, the dispensing device being mounted on a container;
• FIG. 16 is a sectional view of a dispensing device according to a second embodiment of the first embodiment
• FIG. 17 shows a perspective sectional view of the piston of Figure 16
• FIG. 1 illustrates an exploded view of the various parts forming a distribution device 1 of a product L, a liquid in this example, according to an example of a first variant of a first embodiment of the invention.
• the dispensing device according to the present invention can, as in this example, be a pump 1, comprising two main sets:
• a dispensing head 8 fixed at the top thereof.
• the metering portion 7 and the dispensing head 8 together form a pump 1. This pump corresponds to the dispensing device 1.
• FIGS 2 and 3 show this pump mounted on a container, here a container R, filled with a liquid L. It may be a cosmetic product and / or care.
• This pump 1 and this container R thus forms a product packaging assembly.
• the metering portion 7 comprises a connecting member 10 intended, as can be seen in Figure 2, to be mounted on the neck C of the container thus joining the pump 1 to the container R.
• the joining member 10 may have a bottom 19 covered by a neck seal 2, mounted between walls of the open end of the container R, so as to seal against the junction member 10 and this open end.
• the metering portion 7 comprises a cylinder body 6 inside which a piston 3 is mounted.
• the piston 3 is fixedly mounted in the junction member 10, the cylinder body 6 being movable by sliding around the piston 3, along a sliding axis A.
• This sliding axis corresponds here to the longitudinal axis of the dispensing device 1.
• the various elements of the metering portion 7 can be stacked one inside the other along the sliding axis A, in the following order: a first part 30 of the piston 3, hereinafter base of the piston, mounted inside the junction member 10.
• a coil spring 4 mounted in compression between the base 60 of the cylindrical body and the joining member 10, in particular its bottom 19, the turns surrounding here the sliding tube 61
• the connecting member 10 which forms a receptacle inside which are housed the various elements listed above.
• these elements 30, 40, 5, 60, 70, 10 can individually be formed in one piece.
• the metering portion 7 is therefore quite simple.
• the dispensing head 8 may comprise a push button 80 integral with the cylinder body 6, so as to drive the latter downwards, by manual pushing above this push button 80.
• This push button 80 comprises on one side, or at the front, a dispensing orifice (not visible in FIG. 1) through which the liquid L comes out during dispensing. This is located on the right in Figure 1. On the other side, at the rear, this push button 80 can, as here, be opened, thus giving access to a housing 85.
• a tank 86 housing the auxiliary return member 97.
• a cap 87 closes the housing 85 of the push button 80.
• these elements housed inside the push button 80, the push button 80 and the cap 87 can individually be formed in one piece.
• the dispensing head 8 is therefore quite simple.
• FIGS. 2 to 7 represent longitudinal sections of the pump 1 mounted on the container R.
• FIGS. 2 to 7 represent longitudinal sections of the pump 1 mounted on the container R.
• FIG. 2 illustrates the pump 1 before it is put into service, that is to say before the priming phase, which consists in purging the air contained between the communication spaces allowing the delivery of the liquid L to the dispensing orifice 81.
• the joining member 10 may comprise a central portion arranged in a lower manner than the fixing portions at the neck C, so as to be able to protrude below the neck C to be in contact with the liquid L.
• the bottom 19 thus has in the central part, a passage opening 20 arranged vis-à-vis the liquid L.
• This passage opening 20 forms the inlet of the liquid L inside the pump 1.
• the mounting of the pump is achieved by clipping the junction member 10 on the neck C.
• the joining member comprises a skirt 21, here formed by a double wall.
• the lower end of the skirt 21 is open and has on its inner wall clipping lugs 22 projecting inwardly and cooperating with clawing lugs 26 of the neck.
• clipping lugs 22 projecting inwardly and cooperating with clawing lugs 26 of the neck.
• edges project radially and form an intermediate opening O.
• the neck seal 2 forms a dome covering the underside and the bottom of the junction member 10, being arranged around the passage opening 20. According to the invention, the neck seal 2 can, as here, be overmoulded on the junction member 10.
• the cupola forming the neck seal 2 has on a lower surface a circular lip 23, bearing against the projecting edges of the intermediate opening O, thereby forming a first sealing zone at the open end of the R. container
• the dome forming the neck seal 2 has an upper edge with a sealing zone 24 against the upper inner wall of the neck C, thus forming a second sealing zone at the open end of the container R.
• the dome is arranged so that the neck seal 2 is spaced from the inner walls of the neck C between these two sealing zones. Thus, a dry zone is formed between these two sealing zones, which helps reduce the risk of contamination.
• a tubular portion 12 which extends from the bottom 19 of the junction member 10 longitudinally and upwardly.
• the piston 3 Around this, of this piston 3, is mounted the cylinder body 6.
• the base 60 of the cylinder body 6 has an internal space delimited at the top by a top wall 64.
• the sliding tube 61 extends longitudinally downwards from the top wall 64 and an open end 74.
• the internal space is delimited in bottom by an open end 74 and on the side by the sliding tube 61.
• the cylinder body 6 is mounted at the maximum, in the deployed position, thus releasing a volume between the top wall 64 and the top of the piston 3, this volume forming a metering chamber 100.
• the top wall 64 thus forms the top of this metering chamber 100.
• the piston 3 may comprise a central duct 34 leading directly via passages 37 to openings 35 giving into the metering chamber 100. These openings form the liquid inlets L into the metering chamber 100, hereinafter dosing entries 35.
• the central duct 34 opens directly into the tubular portion 12; there is thus a direct communication with the liquid L, which can be conveyed to the dosing inputs 35.
• metering inlets 35 are closed by the inlet non-return valve 5, which passes a fluid entering the metering chamber 100 but prevents it from coming out of these metering inlets 35.
• the inlet non-return valve 5 further illustrated in FIGS. 9 and 10, has an inlet membrane 50 arranged downstream of these metering inlets 35 and in relation thereto, so as to be able to to close.
• the top wall 64 comprises an annular groove, hereinafter top groove 66, arranged around a central zone 65 of the top wall 64.
• top groove 66 is arranged around this summit groove 66.
• summit groove 66 is arranged a flat portion forming a peripheral zone 67.
• the central zone 65, the summit groove 66 and the peripheral zone 67 can be arranged concentrically with respect to the sliding axis A.
• this top groove 66 that is to say at the top of the metering chamber in FIG. 2, is arranged an orifice forming a metering outlet 73, through which the fluids, the liquid after the priming or the At the time of priming, the air can exit from the dosing chamber 100.
• a metering outlet 73 through which the fluids, the liquid after the priming or the At the time of priming, the air can exit from the dosing chamber 100.
• the inlet valve 5 comprises a shape at least partially complementary to the top wall 64. According to the first variant, this complementarity is substantially total.
• the top wall 264 is complementary only to the sides of the valve 5.
• the inlet non-return valve 5 comprises a central portion 54 whose surface forms a disc of the same diameter as the central zone 65 of the top wall 64.
• This inlet membrane 50 comprises an upper flank 51 and the opposite of that- ci, a lower flank 52, these two sides being separated by a wafer 53.
• This wafer 53 is circular and the inlet membrane 50 is arranged so that this wafer 53 is circumscribed in a circle arranged perpendicular to the axis sliding A.
• the upper flank 51 is convex while the lower flank 52 is concave.
• the convex shape of the upper flank 51 is complementary to the summit groove.
• the upper surface of the inlet valve 5 may be complementary to the surface of the top wall 64, in particular, as here, cover the majority of its surface.
• the inlet membrane 50 does not extend to the inner surface of the sliding tube 61, so as to cover the top wall only up to the peripheral zone 67, in the end position.
• the piston 3 may comprise an upper lip 41 arranged on the upper peripheral edge of the piston, as can be seen illustrated in Figure 1 1.
• a portion of the piston 3, here this upper lip 41, can protrude around the wafer 53, and, as can be seen in FIG. 3, when the cylinder body 6 is in the end position, the upper lip 41 is arranged to cover this peripheral zone 67 of the top wall 64.
• the inlet membrane 50 is housed inside the summit groove 66, its upper flank 51 conforming to the bottom of this summit groove 66.
• the central zone 65 is exactly covered the central portion 54.
• the upper lip 41 comes to marry the surface of the peripheral zone 67. It follows that during priming, all the air from the metering chamber 100 is driven away, and all the more easily in the case where the dosing outlet 73 is arranged at the bottom of this summit groove 66.
• the piston base 30 may comprise a sleeve 31 which is fitted on the tubular portion 12.
• the base of the piston may also comprise a wider upper part. that the sleeve 31.
• This upper part may comprise a skirt 32 extending downwards around, at a distance and facing east of this sleeve 31, so as to form an annular groove, into which the top of the portion fits together. tubular 12.
• interlocking shoulders 33 are arranged at the bottom of the sleeve 31 and are clipped beneath complementary internal shoulders 75 arranged on the inner wall of the tubular portion 12.
• This sleeve 31 may comprise, as here, a slot 38 allowing the engagement shoulders 33 to be brought together by deformation of the sleeve 31.
• This sleeve 31 is arranged at the bottom and opens into the tubular portion 12, the inside of the sleeve 31 forming the central duct 34.
• the upper part of the base of the piston 3 may comprise clipping lugs 36, between which the stud 55 is clipped.
• the passages 37 and the metering inlets 35 are in this case formed between these lugs. clip 36 and the stud 55.
• the inlet membrane 50 is able to deform upwardly leaving the open passage to the liquid L through the metering inlets 35, when pressure is exerted on its lower sidewall 52 or when a depression is exercised on the side of its upper side 51.
• the force here downstream upstream on the inlet membrane 50 will place it above the metering inlets 35 and against the piston. 3, so that the dosage inputs 35 will be closed.
• the inlet valve 5 thus forms a non-return valve, allowing the liquid L to pass towards the inside of the metering chamber 100 but preventing it from leaving it via these metering inlets 35.
• the piston in order to improve the seal between the side wall 61 of the cylinder body and the piston 3, the piston comprises a second part 40, which forms a seal, here a tubular joint 40, illustrated in detail in FIGS. 1 1.
• This tubular joint 40 is fitted directly around the upper part of the piston 3.
• This tubular joint 40 comprises two open ends delimited here respectively by an upper lip 41 and a lower lip 42. These lips protrude from the upper part at the top and at the bottom. This allows a double seal against the inner wall of the sliding tube 61.
• the seal may comprise an annular projection 44, the largest diameter of which is arranged to be in contact with the inner wall of the sliding tube 61.
• This annular projection makes it possible to improve the sliding guide of the cylinder body 6.
• the tubular seal 40 is spaced from the inner wall of the sliding tube 61. A gap is created between the sealing zones formed by these lips, reducing the risk of a formation of a continuous film of liquid between them.
• the receptacle formed by the connecting member 10 extends between an open end 1 1 and its bottom 19.
• the interior of the receptacle is formed by side walls 17 having a shoulder forming a limit stop 18.
• the tubular portion 12 may, as here, define the passage opening 20.
• a barrel 14 is arranged concentrically around this tubular portion 12 so as to form between said tubular portion 12 and said barrel 14 a first lower groove 13, within which slides the sliding tube 61 between the end position. race and the deployed position.
• the inner wall of the barrel 14 comprises a recess 15 projecting inwards. This recess 15 is in contact with the outside of the sliding tube 61.
• the sliding tube 61 comprises at its open end a bulge 71 which projects outwards, and which comes into contact with the recess 15 in the end position.
• the pair of seals 70 of the cylinder body 6 comprises an upper seal 72 which surrounds a cooperating portion 69 forming the upper part of the base 60 of the cylinder body. This ensures the seal between the cooperation part and the dispensing head 8.
• the pair of seal 70 of the barrel body 6 comprises a seal forming a bulge ring 71 which thus forms the bulge at the end of the sliding tube 61.
• the bottom of the sliding tube 61 comprises a recess 62 reducing its outer diameter and thus making it possible to produce a receiving portion 63 of the bulge ring 71.
• the pair of seals 70 may be made in one piece by overmolding on the base 60 of the cylinder body.
• a groove may be provided in the barrel body 6 to connect the engagement portion 69 and the receiving portion.
• an injection bead formed in this groove connects the upper seal 72 and the bulge ring 71.
• the diameter of the sliding tube 61 above the bulge ring 71 may correspond approximately to the internal diameter delimited by the recess 15, so that in the end position of the drum walls 14 are unconstrained, and so that when the spring 4 recalls the cylinder body 6 upwards, the sliding tube 61 slides against the recess 15 without constraint on most of the movement. This facilitates the raising of the cylinder body upwards
• the material of the annular bulge 71 is more flexible than that of the connecting member, it is the bulge ring 71 which will compress. This strengthens the tightness.
• the coil spring 4 is arranged inside the receptacle and around the barrel 14.
• the spring 4 takes from one side support at the bottom of a second lower groove 16, formed between the shaft 14 and the side wall 16 of the receptacle.
• the base of the cylinder body 60 comprises a flange 76 wider than the sliding tube 61.
• the spring is supported on the other side against this flange 76.
• the flange may comprise an abutment assembly formed by radial ribs 68 against which the spring 4 is supported.
• the pump 1 is suitable for liquids containing no preservatives and therefore must be protected from outside air.
• the metering outlet 73 is connected to the dispensing orifice 81 via communication spaces and an outlet check valve 9 directly closes this dispensing orifice 81.
• these communication spaces may successively comprise three intermediate ducts and an upper space 82.
• the upper space is defined by the passage through the reducer 83, the tank membrane 96, and the passage in a front wall of the push button 80 leading to the dispensing orifice.
• the reducer 83 may, as here, be in the form of a ring, or a reduction ring 83.
• a first intermediate duct 84a is formed in the cylinder body and leads from the metering outlet 73 to a second intermediate duct 84b arranged in a transverse wall of the push button 80.
• the second intermediate duct 84b opens into a third intermediate duct 84c formed inside the reducer 83 and opening into the upper space 82.
• the hermetic tank 86 can be mounted, here by interlocking, in the housing 85 of the push button 80, so that the edges of the tank membrane 96 are pinched between a corresponding inner shoulder of the push button 80 and the edge of the tank 86, so that the tank membrane 96 hermetically closes the tank 86.
• This tank membrane 96 is here integral with the shutter 90, which extends axially towards the dispensing orifice 81.
• This shutter 90 comprises at its free end a pin 91 arranged to be able to seal the dispensing orifice 81.
• the auxiliary return member 97 is in permanent connection with the vessel membrane 96 and comprises two elastically deformable stages 92, 93, in particular with stiffnesses and / or different geometries.
• the first stage 92 maintains a permanent restoring force of predetermined value against the tank membrane 96, and therefore on the shutter 90.
• the second stage 93 is interposed between the first stage 92 and the bottom 89 of the tank 86, and maintains a restoring force greater than that of the first stage 92, acting only when the tank membrane 96 is biased.
• the first and second stages 92, 93 are here of different geometries.
• first and second stages 92, 93 may be from a central core 94.
• the first stage 92 may extend radially around it by forming a cup 98 whose outer edge bears on the inner wall of the tank 86, for example in grooves or against shoulders of this inner wall.
• This cup 98 is made of an elastic material, and its zone between the core 94 and the outer edge forms an elastic articulation.
• the second stage 93 can extend axially from the same central core 94, forming a bell whose outer edge bears on the bottom 89 of the tank 86.
• This bell 99 is made of an elastic material, and its zone between the core 94 and the outer edge form an elastic hinge.
• the tank 86 being hermetically sealed, it is established that, when the dispensing device is at rest, the pressure P2 of the tank 86 is equivalent to the ambient air pressure at the time of the initial assembly. of the pump 1, that is to say equivalent to the initial atmospheric pressure.
• the auxiliary return member 97 can be made in one piece by molding a thermoplastic elastomer (TPE) or thermoplastic vulcanized (TPV) or silicone or any other material with similar characteristics.
• TPE thermoplastic elastomer
• TPV thermoplastic vulcanized
• the tank membrane 96 and its shutter 90 can be made integrally by molding a thermoplastic elastomer (TPE) or thermoplastic vulcanized (TPV) or silicone or any other material with similar characteristics.
• TPE thermoplastic elastomer
• TPV thermoplastic vulcanized
• the shutter can as here extend axially and be hollow. This allows to house there as here a reinforcing piece 95 in a more rigid material. This reinforcement piece 95 extends from said tank membrane 96 and is in mechanical connection with the first stage 92 of the auxiliary return member 97.
• the part forming here the tank membrane 96 and its shutter 90 and the reinforcement piece 95 can be obtained by bi-material injection.
• the component material of the push button 80, the tank membrane 96, the reducer 83, the cylinder body 6, the inlet check valve and the base 30 of the piston 3 may include antibacterial agents.
• the reducer 83 can be placed inside the volume defined between the tank membrane 96 and the inner walls of the housing 85 push button 80.
• This reducer 83 makes it possible to produce the tank membrane 96 with a diameter greater than the volume available around the shutter 90.
• the housing 85 has a size enabling a tank membrane size 96 and the reduction gearbox to be reduced. the space available between the walls of the housing and the shutter
• the push button 80 is secured integrally with respect to the cylinder body 6 by clipping its flange 76 inside an appropriate groove of the push button 80. This is also the case in the second variant.
• the push button 80 is in the deployed position, as is the cylinder body 6 integral with this push button 80, the top wall 64 being at a distance from the piston 3.
• the metering chamber 100 is therefore at its maximum volume.
• the ducts formed by the tubular portion 12, the central duct 34 and the passages 37, as well as the metering chamber 100 and the different communication spaces 84a, 84b, 84c, 82 are filled with air.
• the push button 80 is then exerted downwardly with respect to the orientation of the pump in FIG. 2.
• the cylinder body 6 then leaves the extended position, illustrated in FIG. 2, towards the end-of-travel position, illustrated in FIG. 3, sliding along the piston 3.
• the air is then compressed in all the communication spaces, in particular in the upper space 82, causing the deformation towards the rear of the tank membrane 96 and thus the retreat of the shutter 90 along the axis of shutter B and rearward, thus releasing the pin 91 of the dispensing orifice 81.
• the cup 98 and the bowl 99 are deformed, the core 94 moving away from the dispensing orifice 81 towards the bottom 89 of the tank 86, the edges of the cup 98 and of the bowl 99 remaining in fixed support against the inner wall of the tank 86.
• the air is expelled through the dispensing orifice 81.
• the spring 4 recalls the cylinder body upwards and therefore drives the push button 80 upwards.
• the top wall 64 which has come into complementary contact with the inlet membrane 50 and the upper lip 41, deviates from the piston gradually increasing the volume of the metering chamber 100.
• a depression is thus created, causing the exercise of a force on the input membrane 50, which then deforms towards the top wall 64, so that its portion 53 deviates from the piston 3, the concavity of the upper flank 51 and the convexity lower flank 52 decreasing.
• the inlet membrane 50 disengages the metering inlets 35, which causes the suction of the air in all the communications leading to the liquid L. The latter is thus also sucked up and up in the tubular wall 12, then in the central duct 34, then in the passages 37, passes through the metering inlets 35, and begins to fill the metering chamber 100.
• this depression causes a deformation of the tank membrane 96 to the dispensing orifice 81, and therefore further presses the shutter 90 in the latter. So we reinforce the boot. This is all the more effective as the sealing of the inlet valve 5 is improved.
• the air is first evacuated. Then, as the piston continues to approach the top wall 64, the liquid L present in the metering chamber 100 reaches the top wall 64, passes through the inlet through the metering outlet 73, and goes up along the intermediate ducts 84a. , 84b, 84c, then fills the upper space 82 around the shutter and reaches the dispensing orifice 81. The air has been totally expelled.
• Figures 16 to 18 therefore illustrate a second variant similar to the first variant of the first embodiment. A complete description of these figures 16 to 18 is therefore not repeated. The characteristics of the example of the first variant previously described are therefore applicable to the example of the second variant, unless otherwise indicated below.
• the push button 80, the outlet check valve, with its shutter 90 with hermetic tank 96, and the inlet nonreturn valve 5 are identical between the variant of FIGS. 1 to 13 and that of FIGS. 18. The same references are therefore used for these elements.
• the piston 3, 203 is therefore in two parts, respectively 30 and 40 and 230 and 240.
• the tubular joint 40, 240 has a portion with a flared surface 45, 245 upwards, here formed at the top of the upper lip 41, 241. This makes it possible to ensure the tightness of the cup edges 53 against this flared surface 45, 245. This reinforces the seal resulting from the preloading of the inlet valve 5 against the piston 3, 203.
• This prestressed clamping is visible particularly in Figure 2, for the first variant, and in Figure 18, for the second variant. This optimizes the sealing of the inlet valve 5 and thus the boot.
• this flared surface 45, 245 with this inlet valve 5 in the form of a cup makes it easier to achieve a tight fit around the metering inlets 35, 235, formed between the clipping lugs 36, 236.
• the clipping lugs 36 and 236 are provided with a convex upper portion 36a, 236a, here formed by a rounded bulge, the convexity of which is arranged vis-à- concavity of the concave shape of the membrane 50.
• the top of this convex shape is wedge the underside of the membrane 50 of the valve 5. This allows it to retain its shape during compression and improves sealing, priming and accuracy of the dosage.
• the length h2 of the seal 240 is greater than the stroke h1 of the piston 203.
• the connecting member 210 also forms in this second variant a receptacle receiving the push button 80 and the spring 4 via its open end 21 1.
• its bottom 219 is different in that it is extended downwards with respect to the first variant. Indeed, to achieve the tubular joint 241 with a greater length h2, the tubular portion 212, the shaft 214 and the first lower groove 213 formed between them, are extended downwards, so that the height h3 between the bottom of the lower lip 242, in the deployed position, and the bottom of this first lower groove 213 is greater than the stroke h1 of the cylinder body 206.
• the same additional sealing means 215, 271 may be added at the top of this first lower groove 213, here on the outside of the bottom of the sliding tube 261.
• the top wall 264 has been simplified. It has the shape of a dome, with the metering outlet 273 arranged in its rounded peripheral portion 264 '.
• the latter is of complementary shape to the outer lateral sides of the concave shape of the membrane 50, so that these outer lateral sides match the peripheral rounded portion 264 'and close the closest metering outlet 273.
• an attached tube 310 is mounted in the passage opening 220 located at the bottom 219 of the connecting member 210. This passage opening is intended to communicate with the intermediate opening O of the container R, so that the The lower end of the tube 310 forms the inlet E 'of the product in the dispensing device 201.
• the tube 310 may, as here, have an inner section 312 of a diameter at least 20% smaller than that of the orifice 220.
• the tube is fitted into the internal duct of the tubular portion 212, through the passage opening 220, in particular up to the vicinity of the lower opening 238 of the central duct 234 of the piston 203, which in turn is clipped into the inner conduit of the tubular portion 212.
• the tube 310 extends below the passage opening 220.
• the pump has only two valves 5, 9 and the outlet valve 9 communicates directly with the metering chamber 300, the depression created in the latter during the ascent of the push button 80 reinforces the closure of the outlet valve 9 and allows here at the stud of the shutter 90 to enter the dispensing hole 81 to have an optimum seal.
• this depression may be insufficient for fluid products, such as water, to ensure optimal sealing.
• adding the added tube 310 of smaller section 312 it provides additional pressure drop and reinforces the closure of the outlet valve 9.
• a section of 3 millimeters (mm) of this tube 310 brings an additional depression in the dose chamber of:
• a section of 1 mm of this tube 310 brings a depression in the dose chamber of:
• the outlet valve 9 optimally, greatly reducing the risk of bacterial retro-contamination.
• the inlet valve 5 operates in association with the inlet valve 5 to generate a sufficient pressure drop in the dose chamber 300, for all fluids as fluid as water and up to very viscous products, to optimize the closure of the dispensing orifice 81 without penalizing the priming with air, which is critical for a pump with a very small dose and a bacterial-tight end closure.
• the dispensing device 101 comprises a proportioning portion 107 that is partly identical to that of the first embodiment. However, the dispensing head 108 is different.
• a single outlet check valve 109 is mounted at the outlet of the metering chamber 200, away from the dispensing orifice 181.
• This second embodiment has the advantage of being simpler. This second embodiment will preferably be used with liquids or creams comprising preservatives.
• the metering portion 107 and the dispensing head 108 thus also together form a pump 101, corresponding to the dispensing device 101.
• this pump 101 is mounted on a container, here a container
• R intended to be filled with a liquid, thus forming a packaging assembly of this liquid.
• the metering portion 107 here comprises a neck seal 102, a connecting member 1 10, a coil spring 104 substantially identical to those of the first embodiment and arranged together in the same manner, as can be seen in FIG. 15 .
• the metering portion 107 also comprises a cylinder body 106 inside which a piston 103 is mounted.
• the piston 103 is fixedly mounted in the junction member 1 10, the cylinder body 106 being slidably movable around the piston 103, along an axis of sliding A '.
• This sliding axis here corresponds to the longitudinal axis of the dispensing device 101.
• the piston 103 is close to that of the first embodiment.
• the piston base 130 comprises a sleeve 131 fitted on the tubular portion 1 12 of the junction member 1 10 and a wider upper portion than the sleeve 131, this piston base 130 is however devoid of a skirt. In addition, it is provided with ribs 132 arranged on the periphery of the upper part of this piston base 130.
• the tubular joint 140 differs from that 40 of the first variant of the first example in that it comprises ribs on its inner surface cooperating with the ribs 132 of the piston base 130. This reinforces the fitting of the tubular joint 140 on this piston base 130. These ribs are present on the second variant of the first embodiment illustrated in FIGS. 16 to 18.
• the outer surface of the tubular joint 140 is identical to that of the first embodiment, in particular as illustrated in FIG. 11, and the same corresponding characteristics apply here.
• the piston base 130 also comprises a first series of clipping lugs 136 of similar shape to those 36 of the piston 30 of the first embodiment, and with which is fixed, as in the first example, a first valve anti -retour input 105.
• This valve 105 is here of a shape identical to that of the inlet non-return valve 5 of the first embodiment.
• the suction of fluid from the container R is done in the same way as in the first embodiment, especially as to the sliding of the cylinder body 106 around the piston 103 from the end position to the deployed position, and as to the opening of the metering inlet 135 by the deformation of the inlet nonreturn valve 105.
• the arrangement at the outlet 173 of the metering chamber 200 differs from the first embodiment, as can be seen in the illustrated example.
• a second nonreturn valve hereinafter output check valve 109, is fixed above the cylinder body 106, so as to allow the opening and closing of the outlet of the dosing chamber. 200, hereinafter metering outlet 173.
• the top 164 of the metering chamber 200 may be formed by a second series of clipping lugs 139 of similar shape to those 136 of the piston 103 which allow the attachment of the inlet non-return valve 105.
• this vertex also forms the top of the cylinder body 106.
• This outlet check valve 109 which passes a fluid leaving the metering chamber 200 but prevents it from entering through these dosing outlets 173.
• This outlet check valve 109 may be formed similarly to the inlet check valve 105, in particular with a central portion and a membrane arranged around this central portion, hereinafter output membrane.
• check valves 105 and 109 are identical and interchangeable. The fact of having here identical check valves allows standardization of these parts.
• this outlet check valve is not necessarily identical in shape to that of the inlet nonreturn valve. It can also be of identical shape but in different proportions.
• these non-return valves 105 and 109 are identical to the inlet non-return valve 5 of the first embodiment. Reference can be made to FIGS. 9 and 10 for these valves 105 and 109. The references of FIGS. 9 and 10 are hereinafter described for the details of the characteristics of the nonreturn valves 105 and 109.
• the outlet membrane 50 is able to deform upwards, leaving the passage open to the liquid through the dosing outlets 173, when a pressure is exerted in the dosing chamber 200 against its lower flank 52.
• the upstream downstream force on the diaphragm 50 of the outlet check valve 109 will place it above the metering outlets 173 and against the top of the cylinder body 106, so that the dosing outlets 173 will be closed.
• the lugs of the second series of clipping lugs 139 here overhang the metering chamber 200. Their underside forms a lower surface 139 '.
• this lower surface 139 ' may have a shape complementary to the upper side 51 of the outlet check valve 109. This allows to cover the lower surface 139', so a portion of the top of the metering chamber, with the membrane 50 of the outlet check valve 109. This reduces the dead volumes at the top of the metering chamber 200.
• cylinder body 106 comprises as in the first embodiment: a cylinder body base 160,
• annular bulge 171 mounted at the bottom of the cylinder body base 160, to reinforce its tightness at the end of the stroke with the barrel 114,
• an upper seal 172 mounted at the top of the cylinder body base 160, for sealing between the cylinder body 106 and the pusher 180.
• This annular bulge 171 and this upper seal 172 can be obtained with the same material and / or can be obtained together during the same injection operation. The latter can be performed in the same way as in the first embodiment.
• the upper seal 172 may comprise a central opening delimited by a flared surface 172 ', in particular conical, this opening widening from upstream to downstream.
• the second non-return valve 109 may be mounted so that the wafer 53 of its membrane 50 is supported above and against this flared surface 172 ', in the rest position and during the suction of the fluid since the passage opening 120 of the connecting member 1 10.
• the connecting member 1 10 is here mounted on the neck C of the container R, its intermediate opening O in communication on one side with the inside of the container R and the other with the passage opening 120.
• the dispensing head 108 is here simpler.
• This head 108 comprises a push button 180, in which the cylinder body base 160 is fixedly fitted, so as to actuate the cylinder body 106 downwards and thus to carry out the discharge of the fluid, while compressing the spring 104 towards the bottom.
• the spring 104 recalls the push button 180 upwards and thus the cylinder body 106, causing the fluid to be drawn into the metering chamber 200.
• the metering outlets 173 can, as here, be connected to the dispensing orifice 181 of the pushbutton 180 via a single duct 184, opening into an upper space 182, into which the dispensing outlets 173 open directly when they are open.
• a reducer 183 may be arranged in this upper space 182 to reduce the dead volumes.
• the inlet check valve 5 of the first embodiment and the inlet nonreturn valve 105 and the outlet check valve 109 of the second embodiment are molded in a flexible material, especially a TPE, with a Shore A hardness of between 30 and 90.
• the membrane 50 of these valves 5, 105, 109 has a thickness of between 0.15 and 0.3 mm.

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• 2017
  • 2017-03-07 FR FR1751827A patent/FR3063661B1/fr active Active
• 2018
  • 2018-03-07 EP EP18712970.5A patent/EP3592470B1/de active Active
  • 2018-03-07 KR KR1020197029263A patent/KR102487773B1/ko active IP Right Grant
  • 2018-03-07 ES ES18712970T patent/ES2938629T3/es active Active
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