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
  • B05B11/1001—Piston pumps
  • B05B11/1023—Piston pumps having an outlet valve opened by deformation or displacement of the piston relative to its actuating stem
  • B05B11/1025—Piston pumps having an outlet valve opened by deformation or displacement of the piston relative to its actuating stem a spring urging the outlet valve in its closed position
• • 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
• • 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

Definitions

• the present invention relates to a device for dispensing a fluid product, such as a pump, intended to be mounted on a tank neck containing fluid product.
• a dispensing device is to take fluid from the interior of the reservoir and to distribute it, advantageously in a metered manner, at the level of a dispensing head which may be in the form of a pusher equipped with a nozzle.
• Such dispensing devices or pumps are frequently used in the field of perfumery, cosmetics or even pharmacy.
• a conventional pump of the prior art can comprise a chamber provided with an inlet valve and an outlet valve and defining a sealed sliding cylinder inside which a piston defining a lip can slide in sealed manner.
• the pump may also include an actuating rod on which the piston is slidably mounted.
• the pump may include a support flange intended to come to bear on the neck of the reservoir. This flange can even be used to fix the pump to the tank neck.
• the pump may also include a ferrule against which the piston is resiliently biased in the rest position. Of course, the rest position corresponds to that where the outlet valve is hermetically sealed.
• the piston is mounted on an actuating rod defining a central channel through which the fluid product pressurized in the chamber is discharged when the outlet valve is open.
• the pump is mounted inside the tank neck with the piston sliding cylinder fully inscribed inside the neck.
• the necks of a perfume or pharmaceutical bottle have a relatively small diameter, so that the sealed sliding cylinder must extend over a relatively large height to define an acceptable chamber volume. This has the effect of lengthening the pump which then extends with its lower end to below the neck, that is to say inside the tank.
• the present invention aims to remedy this aforementioned drawback of the prior art by defining a less elongated configuration pump whose chamber volume is not related to the internal diameter of the reservoir neck.
• the present invention provides that the sealed sliding cylinder is located above the support flange, so that it cannot be inserted into a tank neck.
• the sealed sliding cylinder is located above the support flange, so that it cannot be inserted into a tank neck.
• the internal diameter of the sliding cylinder can then be much greater than the internal diameter of the neck, it is possible to have a considerable chamber volume for a reduced cylinder height.
• the stroke of the pump, that is to say of the actuating rod and the piston can be very short, without limiting the volume of the chamber.
• the sliding cylinder defines a lower end of the stop located substantially at the same level as the support flange. This means that the entire sliding cylinder is located outside the tank neck.
• the piston is provided with guide means to keep it in the axis inside the chamber.
• the guide means comprise an upper guide sleeve engaged in a passage opening formed by the ferrule.
• the guide means may include a lower guide sleeve engaged in a socket defining a lower part of the chamber.
• the upper sleeve can advantageously surround the actuating rod. Indeed, in a conventional pump, the ferrule, which closes the pump, defines the top dead center of the piston. It also defines a central opening through which the actuating rod slides. Therefore, the actuating rod and the piston are held perfectly in the axis due to the distance which exists between the piston and the actuating rod.
• the sleeve defines the lower part of the chamber and defines a lower end serving as a stop for the inlet valve in the open position.
• a precompression spring located outside the chamber bears between the rod and the piston to urge the outlet valve in the closed position.
• a return spring located outside the chamber can bear between the rod and the shell to urge the piston in the rest position.
• a return spring located outside the chamber bears between the rod and the ferrule to urge the piston in the rest position.
• the ferrule can be held together with the support flange on the tank neck using any fixing ring, which can be a ring to screw, snap or crimp.
• the sliding cylinder is formed by a body, the support flange being formed by a ring engaged around the body.
• the pump body is blocked between the ring forming the flange and the ferrule.
• the chamber defines an upper part located above the support flange, and a lower part located below the flange, the sliding cylinder being located at the level of the part high. Indeed, it is not necessary that the entire volume of the pump chamber is located above the flange, it is sufficient that the sliding cylinder of the piston is located above this flange. However, it is preferable that the lower part of the chamber is substantially or entirely emptied when the piston reaches its low position in the sliding cylinder.
• FIG. 1 is a view in vertical cross section through a dispensing device according to the invention in the rest position
• FIG. 2 is a view similar to that of FIG. 1 in the actuated position.
• the fluid dispenser according to the invention shown in Figures 1 and 2 is a pump. It comprises a body 1 which advantageously has a symmetry of revolution.
• the body includes a lower part defining an inlet 11 for the fluid product.
• This inlet 11 is further provided with a sleeve 111 defining at its upper end an inlet valve seat 112.
• This seat 112 cooperates with a movable member 2 of the inlet valve which is in the form of a bucket overturned, the bottom 21 of which is profiled so as to cooperate with the valve seat 112 to make a sealed contact.
• the movable member 2 also comprises an external skirt 22 which concentrically surrounds the sleeve 111. At its lower end, the skirt 22 forms a stop collar 23 which extends radially outwards.
• the shape of the abutment flange 23 corresponds substantially to the shape of the lower part of the body 1 so that there is no significant volume between the flange 23 and the body 1.
• the body forms a first barrel 12 which is cylindrical here but which may have other shapes, for example stepped.
• This barrel 12 ends at its upper end with a shoulder 13 which projects outwards.
• a socket 3 is disposed inside the barrel 12 and extends over a large part of its height.
• This socket 3 comprises an upper flap 31 which projects outwards and which comes to rest on the shoulder 13 formed by the body.
• the sleeve 3 defines a lower end 32 which serves as an abutment surface against which the abutment flange 23 of the movable member 2 of the inlet valve can selectively come into abutment, when the valve is open.
• the stop end 32 thus defines the stroke of the movable member 2 inside the body 1.
• the movable member 2 is trapped in the body 1 because the sleeve 3 prevents it extraction.
• the movable member 2 is first inserted into the body, then the sleeve 3 is fitted inside the barrel 12. Beyond the outer shoulder 13, the body 1 defines a second barrel 14 which defines a sealed sliding cylinder as will be seen below.
• a ring 4 is mounted around the body 1 at the level of the first barrel 12.
• This ring 4 comprises a substantially cylindrical part 41 defining a lower end 411 which comes into contact with the barrel 12. At its upper end, the substantially cylindrical part 41 comes in abutment under the shoulder 13.
• the ring 4 also includes a support flange 42 which extends outwards from the upper end of the substantially cylindrical part 41. It may be noted that there remains a space between the substantially cylindrical part 41 and the barrel 12. It is advantageous to use this space to allow deformation of the substantially cylindrical part 41 without interfering with the barrel 12.
• the support flange 42 defines a lower face intended to come in contact with part of a tank, preferably the upper end of the neck of the tank.
• the substantially cylindrical part 41 is intended to extend inside the neck of the reservoir and can advantageously come into tight contact with this interior wall. Because of the space existing between the part 41 and the barrel 12, it is possible to slightly deform the part 41 inwards without coming into contact or deforming the barrel 12.
• a ferrule 5 is engaged around the second barrel 14, advantageously with a tight contact making a solid attachment.
• This ferrule 5 comprises a collar 52 which extends radially outwards.
• This flange is arranged in contact with the support flange 42 formed by the ring 4.
• the ferrule forms a tower 54 of substantially cylindrical shape.
• This tourette 54 comes into contact with the external wall of the barrel 14, and this contact advantageously achieves the fixing of the ferrule 5 on the body 1.
• This tourette 54 is extended at its upper end by a first re-entrant flap 55 which comes into contact with the upper end of the second barrel 14. Beyond this first re-entrant flap 55, the shell forms a second re-entrant flap 56 of annular shape defining a central passage opening. The internal diameter of this passage opening is less than the internal diameter of the second ft 14.
• the second re-entrant flap 56 of the ferrule 5 reduces the opening towards the interior of the body 1.
• a venting passage 154 is advantageously formed between the body 1 and the ferrule 5 and between the body 1 and the ring 4.
• This passage is represented in the form of a thickened line, but in practice the passage can be formed by a groove made in the body 1.
• the passage is selectively closed by the lower end 411 of the ring which can be elastically deformable to allow air to enter and prevent an outflow of fluid.
• the passage is closed by a conical sealing contact between the flap 55 and the lip base 62. In the actuated position, this contact is broken and outside air can enter the passage by passing through the passage through the second flap 56 and leave the passage by lifting the end 411 of the ring.
• a piston 6 is partially disposed inside the body 1.
• This piston 6 defines a lip base 62 which ends in a sealing lip 61 intended to slide in leaktight manner inside the barrel 14, thus defining a sealed internal sliding cylinder.
• This sealing lip 61 can move in this sealing cylinder over a certain stroke limited below by the outer shoulder 13 and above by the second re-entrant flap 56.
• the shoulder 13 defines the bottom dead center of the piston then that the second re-entrant flap 56 of the shell 5 defines the top dead center of the piston.
• the second barrel 14 Since the shoulder 13 serves as a stop for the support flange 42 which is intended to come into contact with the upper end of a tank neck, the second barrel 14, and therefore makes the internal sealed sliding cylinder, is located above the flange 42, and therefore above the neck or the opening of the reservoir once the pump is mounted on the reservoir.
• the upper chamber 15 and the lower chamber 15' form together the pump chamber.
• the internal diameter of the lower chamber 15 ′ is obviously dependent on the internal diameter of the neck or the opening of the reservoir, given that the pump is introduced and remains engaged in the opening or the neck once mounted on the tank.
• the upper chamber 15 is not at all limited or even influenced by the diameter of the opening or the neck of the reservoir. It is thus possible to considerably increase the volume of the pump chamber by increasing the diameter of the second barrel 14. It is also possible to produce a pump having a very short stroke.
• the sliding cylinder defined by the second barrel 14 is entirely located above the flange 42, so that the entire sliding cylinder is located outside the neck or the opening of the reservoir.
• the piston 6 is provided with guide means which make it possible to hold the piston 6 in the axis of revolution of the body 1.
• these guide means allow the piston 6 to move perfectly axial inside or relative to the body 1.
• These guide means are here in the form of two sleeves, namely a lower sleeve 63 and an upper sleeve 65.
• the lower sleeve 63 is designed and arranged so as to be able to slide without sealing inside the socket 3 engaged inside the first barrel 12 of the body 1.
• the lower sleeve 63 can be produced with an external diameter smaller than the internal diameter of the sleeve 3. It is also possible to imagine providing the external wall of the lower sleeve 63 with longitudinal grooves which allow communication between the chambers 15 and 15 '.
• the upper sleeve 65 it is designed and arranged so that it slides inside the passage opening defined by the second re-entrant flap 56 of the ferrule 5. The upper sleeve 65 can even slide in leaktight manner inside the shell.
• the sleeves 63 and 65 obviously have a sufficient height to allow sliding over the entire height of the stroke of the piston 61 inside the second barrel 14.
• the lip 61 of the piston in the rest position that is to say in abutment against the second reentrant flap 56, is relatively distant from the sleeve 3 inside which the lower part of the sleeve 63 is engaged. This ensures good support in the axis of the piston 6 inside the body 1.
• the lip 61 of the piston 6, when it is in abutment against the shoulder 13 is relatively distant from the second re-entrant flap 56 inside which the upper sleeve 65 is engaged.
• the piston 6 also defines an inner sleeve 68 which defines a lower end 67 serving as a movable member of the outlet valve.
• This cuff 68 is engaged on an actuating rod 7 on which it can slide in a limited manner. In the rest position, the lower end
• This head 71 preferably has a lower profile corresponding to that of the bottom 21 of the bucket formed by the movable member 2 of the outlet valve, so as to reduce the dead volume of the lower chamber 15 ′ in the actuated position of the pump as shown in FIG. 2.
• This head 71 is further formed with a central pin 72.
• the actuating rod 7 is here produced in two parts, namely the head 71 and a corolla 74.
• the corolla 74 defines a central passage 73 inside which the spindle is engaged 72 of the head 71.
• the pin 72 does not fill the entire passage 73, so that there remains one or more peripheral channels situated around the pin 72.
• the corolla 74 also includes a crenellated lower end thus defining with the head 71 side windows 75 which are closed externally by the lower lip 67 formed by the cuff 68 as shown in FIG. 1. This corresponds to the rest position of the pump. .
• the windows 75 are released so that the channel or channels 73 can communicate with the interior of the chamber via the cleared windows 75.
• the fluid contained inside the chamber 15, 15 ′ and pressurized by the piston 6, can thus escape through the actuating rod 7 when the cuff 68 has moved on the rod under the effect of the pressure prevailing inside the chamber.
• This is a conventional design for an actuating rod fitted with a free piston which together forms the outlet valve. Such an arrangement can for example be described in the document FR 2 765 638.
• the corolla 74 also forms a cap 79 which is provided on the outside with a flap 78 oriented downwards.
• This flap 78 serves as a support for a return spring 81 which, on the other hand, comes into engagement with the collar 52 of the ferrule 5.
• This return spring 81 makes it possible to bring the actuating rod 7 back to a rest position, as shown in FIG. 1.
• This spring 81 can also be used to bring the sleeve 68 back into the closed position of the outlet valve as shown in FIG. 1.
• the pump can also be provided with a spring precompression 82 which acts between the cap 79 and the piston 6.
• the precompression spring 82 can for example be housed inside the upper sleeve 65 around the cuff 68. This spring 82 allows the cuff 68 to be brought back to the closed position of the outlet valve as soon as the pressure inside the chamber drops below the force exerted by the spring 82. It should be noted that the spring or springs are located outside the pump chamber. There is thus no contact between the fluid product and the springs which are most often made of steel.
• the upper end of the corolla 74 forms a housing 749 intended to cooperate with a pusher 9 advantageously comprising a fixing sleeve 92 forcibly engaged in the housing 749.
• the pusher can rest on the cover 79 and on the flap 78 with a crown 96.
• the pusher defines a connection conduit 91 in communication with the channels 73 and an outlet channel 93 which leads to a nozzle 94 defining a dispensing orifice 95.
• the rod d actuation 7 is guided neither by the body 1 nor by the ferrule 5.
• the only part with which it is in contact is the piston 6 which slides inside the barrel 14.
• the invention there is a pump, the height of which can be reduced so that the lower end of the body 1 extends only inside the neck without projecting inside the tank. This can be particularly interesting for an aesthetic purpose.
• the height of the pump above the neck can also be reduced since it is sufficient to increase the diameter of the barrel 14 to both increase the volume of the chamber and reduce the stroke of the piston.

Landscapes

• Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
• Reciprocating Pumps (AREA)
• Closures For Containers (AREA)
• Loading And Unloading Of Fuel Tanks Or Ships (AREA)
• Devices For Dispensing Beverages (AREA)
• Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)

Applications Claiming Priority (3)

Publications (2)

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ID=32406423

Family Applications (1)

Country Status (9)

Families Citing this family (11)

Family Cites Families (16)

• 2002
  • 2002-12-23 FR FR0216547A patent/FR2849000B1/fr not_active Expired - Fee Related
• 2003
  • 2003-12-19 WO PCT/FR2003/003837 patent/WO2004058414A1/fr active Application Filing
  • 2003-12-19 BR BR0317663-0A patent/BR0317663A/pt not_active IP Right Cessation
  • 2003-12-19 CN CN200380107316.0A patent/CN1729060A/zh active Pending
  • 2003-12-19 US US10/540,398 patent/US7497356B2/en not_active Expired - Fee Related
  • 2003-12-19 EP EP03799664A patent/EP1583613B1/de not_active Expired - Lifetime
  • 2003-12-19 JP JP2004563286A patent/JP2006511327A/ja not_active Withdrawn
  • 2003-12-19 DE DE60331780T patent/DE60331780D1/de not_active Expired - Lifetime
  • 2003-12-19 CN CN200380100771.8A patent/CN1694768A/zh active Pending
  • 2003-12-19 ES ES03799664T patent/ES2342663T3/es not_active Expired - Lifetime

Non-Patent Citations (1)

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