EP1709945A1 - Dispositif de distribution de liquide avec chambre de dosage et assemblage de soupape à tiroir - Google Patents

Dispositif de distribution de liquide avec chambre de dosage et assemblage de soupape à tiroir Download PDF

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Publication number
EP1709945A1
EP1709945A1 EP05102808A EP05102808A EP1709945A1 EP 1709945 A1 EP1709945 A1 EP 1709945A1 EP 05102808 A EP05102808 A EP 05102808A EP 05102808 A EP05102808 A EP 05102808A EP 1709945 A1 EP1709945 A1 EP 1709945A1
Authority
EP
European Patent Office
Prior art keywords
outlet
inlet
compartment
dispensing device
fluid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP05102808A
Other languages
German (de)
English (en)
Inventor
Christian Péclat
Joel Fontannaz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HELBLING TECHNIK BERN AG
Original Assignee
HELBLING TECHNIK BERN AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by HELBLING TECHNIK BERN AG filed Critical HELBLING TECHNIK BERN AG
Priority to EP05102808A priority Critical patent/EP1709945A1/fr
Publication of EP1709945A1 publication Critical patent/EP1709945A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
    • B05B9/03—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material
    • B05B9/04—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump
    • B05B9/08—Apparatus to be carried on or by a person, e.g. of knapsack type
    • B05B9/0805—Apparatus to be carried on or by a person, e.g. of knapsack type comprising a pressurised or compressible container for liquid or other fluent material
    • B05B9/0838—Apparatus to be carried on or by a person, e.g. of knapsack type comprising a pressurised or compressible container for liquid or other fluent material supply being effected by follower in container, e.g. membrane or floating piston, or by deformation of 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
    • B05B11/02—Membranes or pistons acting on the contents inside the container, e.g. follower pistons
    • 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
    • B05B1/14—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openings; with strainers in or outside the outlet opening

Definitions

  • the present invention relates generally to a device for dispensing a dose of fluid.
  • the present invention relates more particularly to a dispensing device for applying fluid comprising a pressurized reservoir equipped with a dosing module, the dosing module having at least one dosing chamber which is able to communicate, on one hand, with the reservoir and, on the other hand, with at least one nozzle provided for dispensing a dose of fluid.
  • This type of dispensing device is particularly useful for delivering ophthalmic drugs topically.
  • a dispensing device is disclosed, for example, in document WO-A-98/12511 , wherein a piston slidable between a first and a second priming position, upon action of a pre-loaded spring, is actuated by means of a trigger in order to cause a fluid charge to be expelled through a nozzle.
  • This type of dispensing device is not completely convenient because it comprises a lot of components, the precision of the dose delivering is not guaranteed, the complexity of the mechanism causes reliability problems and high fabrication costs.
  • the present invention is aimed to solve the above problems and others.
  • a dispensing device for applying fluid comprising a pressurized reservoir equipped with a dosing module, the dosing module having at least one dosing chamber which is able to communicate, on one hand, with the reservoir and, on the other hand, with at least one nozzle provided for dispensing a dose of fluid, characterized in that the dosing chamber comprises a moving and/or deformable member which delimits at least a first and a second compartments of variable volume, each compartment having an inlet and an outlet associated with valve means, wherein valve means are controlled according to a first configuration in which the inlet of the first compartment and the outlet of the second compartment are open while the other inlet and outlet being closed, and according to a second configuration in which the inlet of the second compartment and the outlet of the first compartment are open while the other inlet and outlet being closed, such that, in the first configuration, the first compartment is refilled with a dose of fluid, under reservoir pressure, while the dose of fluid contained in the second compartment is expelled and, in
  • the dispensing device provides a great ability to deliver a precise dose of drug independently from the orientation of the device, contrarily to conventional eye droppers.
  • the dispensing device prevents a patient to influence or to compromise dose size by incorrect manipulations.
  • the characteristics of the product stream produced by each nozzle permit to overcome the blink reflex of the eyes.
  • the structure of the dispensing device according to the present invention permits extremely small dimensions for the device.
  • a dispensing device of three milliliters (one hundred doses) can be as small as about twenty four cubic centimeters.
  • the characteristics of the dispensing device make the device particularly compact and easy to use compared to usual eye droppers and also to other devices. It is very convenient for elderly people, children and persons with reduced mobility, avoiding assistance of a second person for drug administration.
  • the dispensing device according to the present invention is provided with a fully disposable fluidic path, which can be fabricated for very low cost. Hence, the dispensing device can be made only with plastic components and a metallic or plastic spring, without requiring any other additional energy source.
  • the dispensing device can be easily safely secured for shelf life and shipment.
  • the drug fluid is separated from the dosing module by the septum which avoids fluid degradation and contamination.
  • a dispensing device 10 for delivery of ophthalmic drug in accordance with a preferred embodiment of the present invention is shown.
  • the dispensing device 10 is based on use of a pressurized reservoir 14 (drug primary packaging), preferably but not limited to a cylindrical glass cartridge 12 with a spring loaded piston 18, and a self-dosing delivery module 20 namely the dosing module 20.
  • a pressurized reservoir 14 drug primary packaging
  • a cylindrical glass cartridge 12 with a spring loaded piston 18 preferably but not limited to a cylindrical glass cartridge 12 with a spring loaded piston 18, and a self-dosing delivery module 20 namely the dosing module 20.
  • the cartridge 12 comprises a tubular end portion 22 housing a pre-loaded spring 16 biasing the piston 18 axially towards the dispensing front end 24 of the cartridge 12.
  • the dispensing front end 24 is initially sealed with a septum 26.
  • the reservoir 14 contains the ophthalmic drug in the form of a fluid F to be expelled.
  • the dosing module 20 as shown on figure 3, comprises a support member 28 in the form of a cap which is clipped on the dispensing front end 24 of the cartridge 12, a slide valve assembly 30, and a front cap 32 which is mounted on the front end of the support member 28.
  • the support member 28 comprises an upper 34 and a lower 36 channels in communication with a tubular needle 38 which extends axially at a rear face of the support member 28 in order to pierce the septum 26 so as to set the dispersion device 10 operational.
  • the slide valve assembly 30 comprises a tubular slider 40 delimiting an inner dosing chamber 42 which is able to be in communication with the reservoir 14 through the channels 34, 36.
  • the slider 40 is slidably mounted in a guide groove 44 arranged on the front face of the support member 28, along a sliding axis B1 transversal to the cartridge axis A1.
  • the slider 40 is able to move between two indexed positions, a lower and an upper positions, upon manual actuation such as finger pressure on one transverse end of the slider 40.
  • Figure 3 shows the slider 40 in its upper position
  • figure 8 shows the slider 40 in its lower position.
  • the slider 40 is bistable such that it can not stay in an intermediate position between its two indexed positions.
  • the slider 40 comprises an upper 46 and a lower 48 inlets which are able to match with the orifices of the upper 34 and the lower 36 channels of the support member 28 when the slider 40 is in its upper and in its lower positions respectively.
  • the slider 40 comprises an upper 50 and a lower 52 outlets which are able to communicate with the opening 54 arranged in the front face 56 of the front cap 32, when the slider 40 is in its lower and in its upper positions respectively.
  • each outlet 50, 52 constitutes a nozzle designed for producing a stream S of fluid F through the opening 54 and towards an eye 58 of the patient.
  • Each outlet 50, 52 has a general axis of projection which is inclined relatively to the cartridge axis A1 and which is directed towards the cartridge axis A1 such that, when the dispensing device 10 is well positioned in front of the eye 58, the stream S is directed towards the center of the eye 58.
  • the support member 28 and the front cap 32 are provided with some sealing surfaces 70 selectively facing external orifices of the inlets 46, 48 and of the outlets 50, 52 when the slider 40 occupies some given transversal positions, in order to close selectively the inlets 46, 48 and the outlets 50, 52.
  • the sealing surfaces 70 are closing the upper outlet 50 and the lower inlet 48 and, according to a second configuration, wherein the slider 40 is in its lower position, the sealing surfaces 70 are closing the lower outlet 50 and the upper inlet 46.
  • the sealing surfaces 70 are closing every inlet 46, 48 and every outlet 50, 52.
  • the sealing surfaces 70 belong to a front 66 and to a rear 68 inserts arranged respectively on the rear face of the front cap 32 and on the front face of the support member 28.
  • the slider 40 comprises a shuttle plunger 60 which is slidably mounted in the dosing chamber 42, coaxially to the sliding axis B1 of the slider 40, between an upper position in which the shuttle plunger 60 closes the upper outlet 50 and the upper inlet 34, and a lower position in which the shuttle plunger 60 closes the lower outlet 52 and the lower inlet 36.
  • the shuttle plunger 60 delimits, in the dosing chamber 42, an upper compartment and a lower compartment of variable volume.
  • the given dose D is defined solely by geometry, i.e. by the chamber dimension (diameter) and by the shuttle plunger stroke.
  • the shuttle plunger 60 is actuated by a differential fluid pressure on its lower 62 and its upper 64 sides, in the dosing chamber 42, following a displacement of the slider 40 from an extreme position to the other.
  • the slider 40 During its transversal displacement, the slider 40 comes to an intermediate non stable position, illustrated by figure 5, in which all its channels 46, 48, 50, 52 are closed by the sealing surfaces 70.
  • the slider 40 reaches its lower position, illustrated by figure 6, in which the lower inlet 48 matches with the lower channel 36 of the support member 28 establishing communication with the reservoir 14, and in which the upper outlet 50 emerges into the opening 54 of the front cap 32.
  • the lower side 62 of the shuttle plunger 60 is under fluid pressure of the reservoir 14 which causes the shuttle plunger 60 to slide up expelling the fluid F contained in the upper compartment of the dosing chamber 42 through the upper outlet 50 in the form of a stream S directed towards the eye 58 of the patient, while simultaneously inducing refilling of the lower compartment of the dosing chamber 42, as illustrated by figure 7.
  • the upper outlet 50 emerges into the opening 54 slightly before the opening of the lower inlet 48 such that, when the spraying of the fluid F starts, the upper outlet 50 is completely open, in order to obtain an accurate and continuous stream S.
  • the shuttle plunger 60 At the end of its displacement, the shuttle plunger 60 is in its upper position, as shown on figure 8, closing the upper outlet 50 and the upper inlet 46, and a new dose D of fluid F is ready in the lower compartment of the dosing chamber 42.
  • the quantity of fluid F expelled through the nozzle channel 50 corresponds to a dose D of fluid F.
  • next fluid injection can be realized pressing up the slider 40, as illustrated by the arrow on figure 8.
  • a correct alignment of the dispensing device 10 with the eye 58 is ensured when the patient can see the outlet 50, 52 through the opening 54.
  • An additional visual alignment feature can be easily included along the dispensing device 10, for example a hole and a visible element in black or in another color, or a groove.
  • the delivery of the fluid F occurs in a single stream S within a time of approximately forty milliseconds for an "usual dose" in the range of twenty-five microliters. This timing is crucial to overcome the blink reflex.
  • the delivery time varies only within an acceptable range when the reservoir 14 is being emptied.
  • the actuation speed of the slider 40 has no impact on the delivery time, neither on dose D.
  • the slider 40 is provided with appropriate hard points to make stop impossible during opening of the inlets 46, 48 and of the outlets 50, 52.
  • the dispensing device 10 can be provided with an external housing 72, improving ergonomics.
  • the external housing 72 is enveloping entirely the dosing module 20 and the cartridge 12.
  • An upper 74 and a lower 76 press buttons are arranged on the dosing module 20 in order to permit actuation of the slider 40.

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  • Infusion, Injection, And Reservoir Apparatuses (AREA)
EP05102808A 2005-04-08 2005-04-08 Dispositif de distribution de liquide avec chambre de dosage et assemblage de soupape à tiroir Withdrawn EP1709945A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP05102808A EP1709945A1 (fr) 2005-04-08 2005-04-08 Dispositif de distribution de liquide avec chambre de dosage et assemblage de soupape à tiroir

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05102808A EP1709945A1 (fr) 2005-04-08 2005-04-08 Dispositif de distribution de liquide avec chambre de dosage et assemblage de soupape à tiroir

Publications (1)

Publication Number Publication Date
EP1709945A1 true EP1709945A1 (fr) 2006-10-11

Family

ID=34939209

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05102808A Withdrawn EP1709945A1 (fr) 2005-04-08 2005-04-08 Dispositif de distribution de liquide avec chambre de dosage et assemblage de soupape à tiroir

Country Status (1)

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EP (1) EP1709945A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5361944A (en) * 1991-07-29 1994-11-08 Aka Innovative Developments S.A. Device for the conditioning and the distribution of pasty or liquid products
WO1998012511A2 (fr) * 1996-09-18 1998-03-26 The Boots Company Plc Distributeur de fluide
US5944702A (en) * 1991-12-02 1999-08-31 Instill & Co. Method for instilling a predetermined volume of medicament into an eye
EP1385779A1 (fr) * 2001-02-21 2004-02-04 Ben Z. Cohen Pompe pour dosage precis et ses accessoires

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5361944A (en) * 1991-07-29 1994-11-08 Aka Innovative Developments S.A. Device for the conditioning and the distribution of pasty or liquid products
US5944702A (en) * 1991-12-02 1999-08-31 Instill & Co. Method for instilling a predetermined volume of medicament into an eye
WO1998012511A2 (fr) * 1996-09-18 1998-03-26 The Boots Company Plc Distributeur de fluide
EP1385779A1 (fr) * 2001-02-21 2004-02-04 Ben Z. Cohen Pompe pour dosage precis et ses accessoires

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