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
  • B05B11/0064—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
  • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
  • B05B1/34—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl
  • B05B1/3405—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl
  • B05B1/341—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet
  • B05B1/3421—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet with channels emerging substantially tangentially in the swirl chamber
  • B05B1/3431—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet with channels emerging substantially tangentially in the swirl chamber the channels being formed at the interface of cooperating elements, e.g. by means of grooves
  • B05B1/3436—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet with channels emerging substantially tangentially in the swirl chamber the channels being formed at the interface of cooperating elements, e.g. by means of grooves the interface being a plane perpendicular to the outlet axis
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
  • B05B1/34—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl
  • B05B1/3405—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl
  • B05B1/341—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet
  • B05B1/3468—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet with means for controlling the flow of liquid entering or leaving the swirl chamber
  • B05B1/3473—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet with means for controlling the flow of liquid entering or leaving the swirl chamber in response to liquid pressure
• • 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
  • B05B11/0072—A valve member forming part of an outlet opening
• • 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
  • B05B11/1016—Piston pumps the outlet valve having a valve seat located downstream a movable valve element controlled by a pressure actuated controlling element
• • 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
  • B05B11/1077—Springs characterised by a particular shape or material

Definitions

• Spray head for a fluid dispenser for a fluid dispenser.
• the present invention relates to a spray head for a fluid dispenser, and more particularly to a spray head comprising a shutter.
• the shutters of the outlet orifice of a spray head are used in particular in the pharmaceutical field to solve the problem of the risk of contamination of at least part of the fluid to be dispensed. These shutters are generally actuated, that is to say open, by the pressure created by the pump during its actuation.
• One type of shutter commonly used is in the form of a one-way valve and includes a piston which can slide and move by the pressure created by the pump.
• this piston is assembled inside the expulsion channel for the fluid in the dispensing device. This expulsion channel must therefore be large enough to contain the piston and allow its movement.
• Such shutters are described in particular in documents FR-2 671 329 and US-4 830 284.
• a disadvantage of these devices is that they do not make it possible to limit the dead volume as much as possible. Indeed, an essential characteristic of most of the current spraying devices is the maximum limitation of the dead volume in the expulsion channel. This limitation of the dead volume is particularly important in the case of pumps which require priming consisting of one or more actuations necessary to expel the air from the pump chamber and replace it with the liquid to be dispensed. However, in order to open the dispensing orifice and, consequently, move the orifice which closes it, it is necessary to create sufficient pressure by actuating the pump. In this case, the greater the volume, that is to say the greater the quantity of air, the greater the number of actuations necessary to prime the pump. In some cases, priming even becomes impossible, and standard type pumps are not suitable for this type of application.
• One way to solve this problem is to make the shutter so that the product expulsion channel is defined inside the movable shutter which then moves relative to a fixed element of the head. spray.
• the shutter incorporates the outlet orifice and the expulsion channel is defined between said shutter and said fixed element of the spray head, the latter being then able to be produced so that the dead volume in the channel is minimal.
• Such a device is described in particular in document DE-435 138.
• spray heads generally comprise spray parts connected to the spray orifice and having a particularly critical geometry. This part is usually formed by very narrow channels arranged at different angles and connected to the spray orifice.
• the geometry of the spraying part is seriously modified by the presence of the shutters. It is the same for the deformable shutters which do not move in the expulsion channel but which have a deformable shutter part which opens under the pressure of the product.
• the quality of the device remains insufficient.
• the entire spray geometry that is to say the channels and the swirl chamber, is influenced by the movement of the shutter from its closed position to its spray position.
• this displacement of the shutter generates a gradual increase in the size of this spray geometry, which has a detrimental influence on the quality of the spray, in particular on its consistency during successive actuations.
• the quality and intensity of the spray are in this case dependent on the actuating force exerted on the pump, and too weak actuation can generate a poor quality spray.
• the effectiveness of the device is not optimal, because the pressure of the product, to open the shutter, acts in the opposite direction to the direction of expulsion of the product.
• the present invention aims to provide a spray head for a fluid dispenser which does not reproduce the aforementioned drawbacks.
• the present invention therefore aims to provide a spray head comprising a shutter in which the quality of the spray spray is optimal and constant each time the device is actuated.
• the object of the present invention is to provide a spray head in which the quality of the spray is identical to a device not comprising a shutter for the spray orifice.
• the present invention also aims to provide a spray head provided with a shutter, in which the dead volume of the expulsion channel is limited to the maximum.
• the present invention also aims to provide such a spray head which is simple and inexpensive to produce and assemble.
• Another object of the present invention is to provide such a spray head which prevents any contamination of the product at the level of the shutter and / or of the spray orifice.
• Another object of the present invention is to provide such a spray head which achieves all the above-mentioned aims.
• the present invention therefore relates to a spray head for a fluid dispenser, comprising an expulsion channel opening into a spray orifice, and a shutter movable between a position for closing said orifice and a spray position, said shutter being elastically biased towards its closed position and being moved towards its spraying position by the pressure of the product, the spray head further comprising a swirl chamber of variable volume, the volume of said swirl chamber being maximum in position of spraying the shutter and substantially zero in the closed position, and said shutter comprises swirl channels connecting, in spray position, said expulsion channel with said swirl chamber, the volume and the geometry of said channels remaining unchanged whatever the position of the shutter.
• the movable shutter comprises at one end the spray orifice and at its opposite end a piston sliding in leaktight manner in the expulsion channel.
• the spray orifice in the closed position, is closed by an insert fixedly disposed in the expulsion channel, said swirl chamber forming between said insert and said spray orifice when the shutter moves towards its position. spray.
• said swirl chamber is cylindrical, the side wall and the upper front face being formed by the shutter, and the lower front face being formed by the insert.
• said swirl channels open into said side wall of the swirl chamber, so that in the closed position of the shutter, they are closed by said insert.
• said movable shutter comprises a hollow tubular sleeve provided with a bottom wall incorporating in its center the spraying orifice, and a small hollow tube fixedly fitted inside the tubular sleeve abutting against said bottom, said tube comprising in its upper surface abutting against the bottom of the shutter one or more spray channels connecting the external peripheral surface of said tube to the internal peripheral surface of said tube.
• said small hollow tube has one or more passages formed in its external peripheral surface fitted into the tubular sleeve of the obturator, said passages being connected to said channels and forming a part of the expulsion channel.
• said shutter is disposed sliding around an insert fixedly disposed in the spray head, said expulsion channel being at least partially defined between said shutter and said insert.
• said spray head comprises a body, an elastic element forming a seal being disposed between the movable shutter and the body of the spray head, said elastic element urging said shutter towards its closed position and being compressed when the shutter moves to its spray position.
• said spray head comprises a body surmounted by an elastically deformable element fixed to said body, the shutter cooperating with said element which urges said shutter towards its closed position and which is deformed when the shutter moves to its spray position.
• the elastically deformable element is fixed in leaktight manner to said coips of the spray head and to said shutter, so that sealing is guaranteed in all the positions of the shutter.
• said elastically deformable element is a cap of elastomeric thermoplastic.
• one or more parts of said spray head which are in contact with the product comprise a bacteriostatic material.
• Figures 1 and 2 are schematic sectional views of the spray head according to an embodiment of the invention, respectively in the closed position and in the spray position of the shutter;
• Figures 3 and 4 are schematic sectional views of the upper part of the spray head shown in Figures 1 and 2, respectively in the closed position and in the spray position of the shutter,
• Figure 5 shows another embodiment of the invention, and
• Figure 6 shows yet another embodiment of the invention.
• the spray head 100 shown has the general shape typical of a nasal nozzle. Although it is mainly in this application that the quality and consistency of the spray are important, the invention is not limited to use in nasal-type tips, but can, on the contrary, be adapted in all types of spray head.
• the spray head 100 comprises a body 101 to which is statically fixed an insert, commonly called an internal nozzle, which partially defines the expulsion channel 1 of the spray head.
• an insert commonly called an internal nozzle
• the expulsion channel 1 is defined, at this upper part of the insert 5, between said insert 5 and said movable shutter 10.
• the shutter 10 is biased towards its closed position by a spring 16 which rests on a body on the body 101 of the spray head and on the other hand on said movable shutter 10.
• the insert 5 extends into the spray head near the spray orifice so that in the closed position, said spray orifice 9 is closed by the upper front face of the insert 5, as visible in FIGS. 1 and 3.
• the movable shutter 10 is preferably produced in the form of a hollow tubular sleeve 11 which has on one side, the upper side in the figures, a bottom wall 12 which incorporates the spray orifice 9.
• the tubular sleeve 11 of the movable shutter 10 is slidably disposed around the insert 5 so as to leave a narrow passage between the shutter 10 and the insert 5 which forms part of the expulsion channel 1 of the product.
• the tubular sleeve and the bottom wall are preferably non-deformable, the opening of the spray orifice being effected by displacement of the shutter.
• the spraying head comprises a swirl chamber 20 of variable volume which is formed upstream of the spraying orifice 9 when the shutter 10 is in the spraying position.
• This swirl chamber 20 is connected to the expulsion channel 1 by one or more swirl channels 30.
• this swirl chamber 20 is formed between the bottom wall 12 of the shutter 10 in which is located the spray orifice 9 and the upper front face of the insert 5.
• this swirl chamber has a maximum volume in the spray position (fig. 2 and 4) and a substantially zero volume in the position obturation (fig. 1 and 3), in which the upper front face of the insert 5 rests in leaktight manner against the bottom face 12 of the shutter so as to close the spray orifice 9.
• a small hollow tube 15 is fixedly fitted inside the tubular sleeve 11 of the shutter 10, in abutment against the bottom 12 thereof.
• This small hollow tube 15 cooperates with an upper end part of the insert 5 of reduced diameter so that the inner peripheral surface of the small hollow tube 15 slides on the external peripheral surface of said upper part of the insert 5 of substantially sealed, preventing the passage of product at this level, the channel expulsion 1 of the product therefore extending outside said small hollow tube 15.
• the upper front face of the small hollow tube 15 incorporates the spray channels 30 which, in the spray position, connect the expulsion 1 to said swirl chamber 20 and which, in the closed position, are closed by said peripheral wall of said upper part of the insert 5.
• the small hollow tube 15 has on its outer peripheral wall fitted into the sleeve tubular 1 1, one or more passages for the product, said passages forming a part of the expulsion channel 1.
• the geometry of the spray channels 30 remains unchanged regardless of the position of the shutter 10. In the closed position , they are closed at their downstream end by the peripheral wall of the insert 5, this downstream end being open when the shutter 10 moves towards its sprayed position rization, thereby creating the swirl chamber 20.
• the geometry of the swirl channels influencing the quality of the spray the fact that this geometry remains unchanged makes it possible to guarantee at each actuation a perfect spray and spray, whatever the force of actuation on the device.
• the implementation described above implies that the swirl chamber 20, which is of variable volume, however has a constant cross section, which also promotes the quality and consistency of the spray.
• the product When the user actuates the spraying device, the product is pressurized in the expulsion channel and in the swirl channels. This pressure is transmitted to the shutter piston which moves to its spraying position, thus forming the swirl chamber. As soon as the downstream end of the channels is cleared, the product is expelled towards the swirl chamber then sprayed through the spraying orifice. Because the geometry of the channels remains unchanged, the pressure rise in the product is immediate there from the start of actuation, so that the spraying spray is always identical and of good quality. In particular, the fact that the channels comprise product under pressure also has the effect of accelerating the movement of the shutter towards its spraying position as soon as the downstream end of the channels is partially released. It is therefore impossible to make a spray poor or poor quality, even when the device is weakly actuated.
• the shutter 10 is no longer biased towards its rest position by a spring, but it cooperates with a compressible seal 116 disposed between the shutter 10 and the body 101 of the head.
• the seal 116 urges the shutter towards its rest position.
• the seal 116 is compressed by the shutter 10 under the effect of the pressure of the product and the shutter can move towards its spraying position.
• the elasticity of the seal 116 brings the shutter 10 back to its rest position.
• the metal spring is replaced by a seal made of plastic material, which is favorable, in particular as regards the cost and the compatibility of the materials.
• the seal 116 also seals between the spray head 100 and the shutter 10 and prevents the penetration of bacteria or germs into said head.
• the thickness of the seal 116 can be significantly less than that of the spring, so that the spray head can have a smaller dimension.
• the body 101 of the head is surmounted at its end by an elastically deformable element 216, such as a cap of elastomeric thermoplastic.
• This cap 216 is fixed on one side to the coips 101 and on the other side to the shutter 10, preferably in a sealed manner. It urges the shutter 10 to its rest position and deforms under the effect of the pressure exerted by the product on the shutter when the device is actuated to allow the shutter 10 to move towards its spraying position. . Then, the cap 216 brings the shutter back to its rest position.
• This variant has the advantage of avoiding any penetration of bacteria or germs, even at the end of the head, into the slot located between the shutter 10 and said cap 216. Indeed, in this variant, the shutter 10 does not slide relative to said cap 216, so that the slot located at the end of the head between the cap 216 and the shutter 10 can be completely sealed.
• the spray head 100 can comprise a bacteriostatic material at level of one or more surfaces in contact with the product to be expelled.
• this bacteriostatic material can be a material which acts by contact, rather than by relaying ions in the product.

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• Nozzles (AREA)
• Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=9521858

Family Applications (1)

Country Status (7)

Cited By (1)

Families Citing this family (30)

Family Cites Families (13)

• 1998
  • 1998-01-16 FR FR9800442A patent/FR2773784B1/fr not_active Expired - Fee Related
• 1999
  • 1999-01-15 US US09/600,131 patent/US6443370B1/en not_active Expired - Fee Related
  • 1999-01-15 WO PCT/FR1999/000063 patent/WO1999036185A1/fr active IP Right Grant
  • 1999-01-15 DE DE69919321T patent/DE69919321T2/de not_active Expired - Fee Related
  • 1999-01-15 EP EP19990900925 patent/EP1047505B1/de not_active Expired - Lifetime
  • 1999-01-15 JP JP2000539940A patent/JP2002509026A/ja not_active Withdrawn
  • 1999-01-15 CN CN99802181A patent/CN1118333C/zh not_active Expired - Fee Related

Non-Patent Citations (1)

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