CN1859983A - A dispensing apparatus - Google Patents

A dispensing apparatus Download PDF

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Publication number
CN1859983A
CN1859983A CNA2004800280562A CN200480028056A CN1859983A CN 1859983 A CN1859983 A CN 1859983A CN A2004800280562 A CNA2004800280562 A CN A2004800280562A CN 200480028056 A CN200480028056 A CN 200480028056A CN 1859983 A CN1859983 A CN 1859983A
Authority
CN
China
Prior art keywords
measurement chamber
piston
fluid
import
chamber
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.)
Pending
Application number
CNA2004800280562A
Other languages
Chinese (zh)
Inventor
安德鲁·D·赖特
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.)
Consort Medical PLC
Original Assignee
Bespak PLC
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 Bespak PLC filed Critical Bespak PLC
Publication of CN1859983A publication Critical patent/CN1859983A/en
Pending 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
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1042—Components or details
    • B05B11/1066—Pump inlet valves
    • B05B11/107—Gate valves; Sliding valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—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
    • B05B11/1038—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

Landscapes

  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

A hand-held multi-dose dispensing apparatus (10) comprising a metering chamber (20) having an axis (21), an end portion (22) at one axial end of the chamber (20) and a side body portion (23) extending from the axial end portion (22), a piston arrangement (30) movable with a piston stroke along the axis of the metering chamber (20) with a seal portion (34) of the piston arrangement (30) being slidably engageable with an inside surface of a side portion (23) of the metering chamber, an inlet (27) for fluid to enter the metering chamber (20), and an outlet (31, 32) for fluid to be dispensed from the metering chamber (20), wherein the inlet (27) is provided on the side body portion (23) of the metering chamber and, in use, during a first portion of the piston stroke, the inlet (27) is in fluid communication with the metering chamber (20) and during a second portion of the piston stroke, the seal portion (34) of the piston arrangement (30) blocks the inlet (27) preventing fluid from passing from the inlet (27) into the metering chamber (20). This dispensing apparatus (10) reduces variations in the shot weight dispensed, by the metering of the fluid commencing at the point at which the piston enters the second portion of its stroke blocking off the inlet.

Description

Distributor
Technical field
The present invention relates to a kind of distributor, relate in particular to the multiple dose distributor that is used to distribute with the Fluid Volume of metering.
Background technology
Conventional multiple dose distributor has the measurement chamber that wherein is furnished with piston.Measurement chamber is extracted fluid to be allocated out by dip-tube from holder.Dip-tube is connected to the bottom of measurement chamber by check valve.When the needs distributing fluids, in measurement chamber, axially depress piston and leave measurement chamber by outlet to force fluid.When the fluid of force applications in measurement chamber, the check valve that generally includes ball or rubber flap seals up the passage from the measurement chamber to the dip-tube.After fluid was assigned with, piston was released and turns back to its original rest position, extracted more fluid from holder out, and fluid upwards enters dip-tube, and when piston raises by the check valve in the measurement chamber bottom and enter measurement chamber.
Yet, know, check valve efficient not high and can bring distribute the variation of injection rate.In addition, also find because the error (this can cause the difference of piston rest position) of a lot of volume production parts accumulations can be changed by the injection rate that different distributor distributed.
Summary of the invention
Target of the present invention is to reduce the variation of the injection rate of multiple dose distributor.
According to the present invention, a kind of hand-held multiple dose distributor is provided, it comprises
Measurement chamber, it has axis, is positioned at the end at this axial end portion place, chamber and the side body portion of extending from this axial end portion,
Piston apparatus, it can move with the axis of a piston stroke along measurement chamber, and the sealing of this piston apparatus engages slidably with the inner surface of the sidepiece of measurement chamber,
Allow fluid enter measurement chamber import and
The outlet that allows fluid dispense from measurement chamber,
Wherein import is located on the side body portion of measurement chamber, and in use, during the first of piston stroke, import and measurement chamber fluid communication, and during the second portion of piston stroke, the sealing of piston apparatus stops up this import, thereby prevents that fluid from entering or leaving measurement chamber from the import process.
Be positioned at import on the measurement chamber sidepiece and make the action of piston during first and second parts of piston stroke, provide respectively and stop up the measurement chamber import and just eliminated demand, thereby reduced the cost of distributor and increased its reliability for check valve with the fluid communication of measurement chamber import.In addition, because the volume of distributing fluids is determined have fluid to enter measurement chamber again because it has stopped up import and has prevented by the position that piston enters its stroke second portion, the fluid of more consistent like this volume is assigned with away.So just avoided because the variation that error produced of dispenser part accumulation, described error can cause the variation of piston rest position between distributor, and thereby also caused the variation of injection rate.
Preferably, between the end of measurement chamber and piston, be provided with resilient element.The solstics that is in its stroke middle distance measurement chamber end at piston is located, and this resilient element forces piston to enter rest position.This resilient element for example can be flexible member or spring.When actuating distribution device, the user preferably promotes this piston from the rest position of piston, and the first by its stroke reaches the blocked second portion of import, to prevent having fluid to enter measurement chamber again.When piston further progressed into the second portion of its stroke, stream was opened measurement chamber and is assigned with away thereby fluid is forced through outlet, touches the bottom up to piston.After piston touched the bottom, user's release plunger and resilient element forced piston to turn back to its rest position.When piston returned by the blocked stroke second portion of import, the pressure in the measurement chamber of expansion descended.When piston reached the stroke first of import and measurement chamber fluid communication, because the pressure that reduces in the measurement chamber, thereby fluid was inhaled into measurement chamber, and piston forces by resilient element and enter its rest position, prepared to activate next time.
Piston apparatus preferably includes first and piston seal, piston seal is arranged to respect to the inner surface of measurement chamber engaged and sealing and can be removable with respect to the first of piston apparatus slidably, so that during the second portion of piston stroke, when the pressure in the measurement chamber exceeds specified level, thereby first and piston seal relative to each other move the outlet of opening fluid to be allocated.
Description of drawings
Now with reference to accompanying drawing embodiments of the invention are only described by way of example, in the accompanying drawings:
Fig. 1 shows the viewgraph of cross-section that piston wherein is in the distributor of rest position;
Fig. 2 shows the viewgraph of cross-section of distributor shown in Figure 1, wherein piston apparatus stop up mouth and
Fig. 3 shows the viewgraph of cross-section of distributor shown in Figure 1, and wherein piston apparatus is in lowest point.
The specific embodiment
Fig. 1 shows the viewgraph of cross-section of distributor 10 before activating.Distributor 10 has measurement chamber 20, and measurement chamber 20 has the end 22 at axis 21, an end place and surrounds the side body portion 23 of measurement chamber 20 from its extension thus.In this example, side body portion 23 has the narrow section 24 and the frusto-conical portion 25 of leading to broad section 26 of adjacent end 22.Yet measurement chamber can be any desirable shape, such as cylindrical.
Side body portion 23 has the import 27 that is formed at wherein.In use, import 27 is connected to dip-tube so that the fluid that will distribute is extracted out by the collar 28 from the holder (not shown).Holder can be any suitable container, and it preferably but not necessarily be connected to distributor 10.
Piston apparatus 30 is located in the measurement chamber 20.Piston apparatus comprises inserted link 31, and has the annular core 32 of sliding on inserted link part length.Core 32 relies on first annular base 33 that extends out from inserted link 31.Piston apparatus also has the piston seal 34 that slides on core 32.The outer surface of piston seal 34 is with respect to the inner surface of the side body portion 23 of measurement chamber 20 engaged and sealing slidably.Piston seal 34 relies on second annular base 35, and described second annular base 35 resembles first annular base 33, also extends out from inserted link 31.Resilient element (in this example for spring 36) is located between annular base 37 on the core 32 and the piston seal 34 piston seal 34 is pressed on the annular base 35 on the inserted link 31.
Another resilient element (in this example for another spring 38) is located between the end 22 of measurement chamber and the annular base 39 on inserted link 31 downsides piston apparatus 30 being pressed to rest position as shown in Figure 1, and the annular protrusion 40 of core 32 engages with lid 50 on being located at measurement chamber 20.The epimere of core 32 extends through and is located at the circular holes of covering in 50 51.
The actuator (not shown) that is fit to is attached to and extends through the core epimere (section) that is located at the hole 51 that covers in 50.Actuator will be used for adopting the application of distributor (such as nasal cavity distributor or oral cavity distributor).
Lasso 60 is provided as to be attached to and covers 50.In use, the container (not shown) of fluid to be allocated can be attached to lasso 60 so that measurement chamber 20 is surrounded by container and fluid to be allocated can upwards be retracted to the dip-tube (not shown) that is connected to import 27 from container.
Fig. 2 shows the distributor 10 that begins to activated, and passes the epimere that covers 50 cores that extend out 32 and manually depressed so that its end 22 towards measurement chamber 20 is promoted by the user.When the user depresses core 32, thus annular protrusion 40 break away from cover 50 and piston seal 34 on the inner surface of measurement chamber, prevent that with obstruction import 27 fluid from entering measurement chamber 20 again to lower slider.In case piston seal 34 stops up mouth 27 when being pushed down, just begin the metering of fluid.Because the volume of distributing fluids is just controlled by a size (being the end 22 of the bottom of import 27 to measurement chamber 20) of measurement chamber 20, just reduced the variation of injecting weight significantly.
By further when the end 22 of measurement chamber 20 promotes, the pressure in the measurement chamber 20 increase at core 32.When the pressure in the measurement chamber 20 had overcome the power that the spring 36 that acts on the piston seal 34 produced, piston seal 34 was with respect to inserted link 31 displacements.In this example, by the spring of selecting to be fit to 36 pressure that causes piston seal 34 with respect to inserted link 31 displacements in the measurement chamber 20 is arranged on predeterminated level.Yet by the spring of selecting to be fit to, piston seal 34 can be arranged in any in the measurement chamber 20 wishes under the pressure with respect to inserted link 31 displacements.Be shifted (unseating) from inserted link 31 by seal 34, be forced to pass from the fluid of measurement chamber 20 and be exposed to the opening (not shown) in core 32 bottoms and be upward through the outlet that core 32 arrives in the actuators.
When core 32 manually further was pressed into measurement chamber 20, fluid continued to be assigned with, and arrived bottommost up to piston apparatus.At this moment, the user stops depressed actuator and core 32, and spring 38 upwards promotes to turn back to measurement chamber 20 with piston apparatus 30.When piston apparatus 30 passed through this part of its strokes, piston seal 34 keeps import 27 is stopped up and measurement chamber 20 interior pressure can reduce when its volumetric expansion.When piston seal 34 raises so that import 27 is when being communicated with measurement chamber 20 fluids, the pressure that reduce in the measurement chamber 20 are pumped into fluid in the measurement chamber from holder and dip-tube (not shown), and preparation is actuating next time.Piston apparatus 30 is pushed the stop position (rest position) that turns back to as shown in Figure 1 by spring 38, and the annular protrusion 40 of overmolded core this moment (over moulded core) 32 engages with lid 50, prepares to activate next time.
Distributor can be used for distributing any suitable fluid.Yet, fluid preferably medicament and can comprise for example pure medicament or have liquid and/or pharmacology on the medicament of acceptable excipient.
Can make a lot of modification to above-mentioned example, and these still fall into scope of the present invention.For example, measurement chamber 20 can be any suitable shape.In addition, fluid can come out from measurement chamber by any suitable outlet.But distributor preferably is made of plastics also and can be made by any suitable material.In addition, any closed-system can both be used for distributor is attached to the container of fluid to be allocated, such as spiral or buckle closed-system.

Claims (8)

1. hand-held multiple dose distributor, it comprises
Measurement chamber, it has axis, is positioned at the end at this axial end portion place, chamber and the side body portion of extending from this axial end portion,
Piston apparatus, it can move with the axis of a piston stroke along measurement chamber, and the sealing of this piston apparatus engages slidably with the inner surface of the sidepiece of measurement chamber,
Be used for fluid enter measurement chamber import and
Be used for the outlet that fluid dispenses from measurement chamber,
Wherein import is arranged on the side body portion of measurement chamber, and in use, during the first of piston stroke, import and measurement chamber fluid communication, and during the second portion of piston stroke, the sealing of piston apparatus stops up this import, thereby prevents that fluid from entering or leaving measurement chamber from this import.
2. according to the device of claim 1, wherein between the end in piston apparatus and this chamber, be provided with elastic device.
3. according to the device of claim 2, wherein this resilient mounting is a spring.
4. according to the device of aforementioned arbitrary claim, wherein this import can be connected to the holder of fluid to be allocated.
5. according to the device of claim 4, wherein the holder of fluid is the container that can be attached to distributor.
6. according to the device of aforementioned arbitrary claim, wherein piston apparatus comprises first and piston seal, piston seal is arranged to respect to the inner surface of measurement chamber engaged and sealing and can be removable with respect to the first of piston apparatus slidably, so that during the second portion of piston stroke, when the pressure in the measurement chamber exceeds specified level, thereby first and piston seal relative to each other move the outlet of opening fluid to be allocated.
7. according to the device of aforementioned arbitrary claim, wherein during the second portion of piston stroke, piston was arranged and to be moved away from the end of measurement chamber and the sealing of piston apparatus stops up mouth this moment, pressure in the measurement chamber reduces up to the first that reaches piston stroke, the pressure that reduces in import this moment and measurement chamber fluid communication and the measurement chamber is introduced measurement chamber with fluid, prepares to activate next time.
One kind basically as mentioned in described with reference to the accompanying drawings device.
CNA2004800280562A 2003-09-29 2004-09-06 A dispensing apparatus Pending CN1859983A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0322758A GB2406330B (en) 2003-09-29 2003-09-29 A dispensing apparatus
GB0322758.4 2003-09-29

Publications (1)

Publication Number Publication Date
CN1859983A true CN1859983A (en) 2006-11-08

Family

ID=29287036

Family Applications (1)

Application Number Title Priority Date Filing Date
CNA2004800280562A Pending CN1859983A (en) 2003-09-29 2004-09-06 A dispensing apparatus

Country Status (7)

Country Link
US (1) US20090173752A1 (en)
EP (1) EP1667801B1 (en)
CN (1) CN1859983A (en)
BR (1) BRPI0414820A (en)
DE (1) DE602004022685D1 (en)
GB (1) GB2406330B (en)
WO (1) WO2005030401A1 (en)

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Also Published As

Publication number Publication date
GB2406330B (en) 2005-12-07
EP1667801A1 (en) 2006-06-14
US20090173752A1 (en) 2009-07-09
WO2005030401A1 (en) 2005-04-07
DE602004022685D1 (en) 2009-10-01
EP1667801B1 (en) 2009-08-19
GB2406330A (en) 2005-03-30
GB0322758D0 (en) 2003-10-29
BRPI0414820A (en) 2006-11-14

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