IL39916A - Device for dispensing fluids - Google Patents

Device for dispensing fluids

Info

Publication number
IL39916A
IL39916A IL39916A IL3991672A IL39916A IL 39916 A IL39916 A IL 39916A IL 39916 A IL39916 A IL 39916A IL 3991672 A IL3991672 A IL 3991672A IL 39916 A IL39916 A IL 39916A
Authority
IL
Israel
Prior art keywords
vane
lever
dose
dispenser
valve
Prior art date
Application number
IL39916A
Other versions
IL39916A0 (en
Original Assignee
Bespak Industries Ltd
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 Industries Ltd filed Critical Bespak Industries Ltd
Publication of IL39916A0 publication Critical patent/IL39916A0/en
Publication of IL39916A publication Critical patent/IL39916A/en

Links

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M15/00Inhalators
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M15/00Inhalators
    • A61M15/0091Inhalators mechanically breath-triggered
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M15/00Inhalators
    • A61M15/0091Inhalators mechanically breath-triggered
    • A61M15/0093Inhalators mechanically breath-triggered without arming or cocking, e.g. acting directly on the delivery valve
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M15/00Inhalators
    • A61M15/0091Inhalators mechanically breath-triggered
    • A61M15/0096Hindering inhalation before activation of the dispenser
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M15/00Inhalators
    • A61M15/009Inhalators using medicine packages with incorporated spraying means, e.g. aerosol cans

Landscapes

  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Bioinformatics & Cheminformatics (AREA)
  • Pulmonology (AREA)
  • Veterinary Medicine (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Nozzles (AREA)
  • Loading And Unloading Of Fuel Tanks Or Ships (AREA)
  • Measuring Volume Flow (AREA)
  • Medicinal Preparation (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Coating Apparatus (AREA)

Description

o^nn mr %? jprn DEVICE FOR DISPENSING The invention relates to devices for dispensing, fluids, and more particularly to devices for dispensing fluid from aerosol containers of the kind which, in action, discharge through~~a spray stem or other spray head. Such aerosol containers are hereinafter referred to as aerosol containers of the kind described.
The use of aerosols for the relief of ailments such as asthma and bronchitis has been known for many years. It is however important that the user receives a dose of the drug from the aerosol at the commencement of inhalation of the breath to' ensure that the fine particles penetrate into the smallest airways in the lungs..
Apparatus has been devised in which the user must suck at : a mouthpiece and then actuate the aerosol, the user not being able to draw any breath until the aerosol is actuated. This is undesirable as many users have ■ difficulty drawing breath even under normal circumstances.
In other known devices the user first cocks a spring on ;the device and then draws a breath through the device. The spring is triggered by a breath controlled valve and the energy stored in the spring is utilised to^ actuate the aerosol. However these devices are complicated in construction and therefore expensive.
Furthermore as considerable force is required to actuate the aerosol the dose is not always released right at the start of drawing breath.
It is an object of the invention to provide a device for dispensing fluid from an aerosol container which device is of very simple and inexpensive construction, It is preferred that the dose is stored partly in the spray head and partly in the receiving means.
The aerosol may he of the kind in which movement of the aerosol body toward the spray head causes a dose of fluid to be ejected into the spray head.
Alternatively the aerosol may be of the kind in which ■ movement of the aerosol body towards the spray .head causes a dose of fluid to be prepared for ejection •into the spray head and return movement of the aerosol away from the spray head causes ejection of the dose.
As a' further alternative the aerosol may be of the kind in which movement of the aerosol body towards the spray . head causes continuous flow . of . fluid into the spray head. To eject a discrete dose with either of these two alternative aerosols.it is necessary to move the aerosol body towards the spray head and then away from the spray head. When the device is for use with either of these two alternative aerosols the device may include means to prevent connection of the duct to the receiving means until the discrete dose has been ejected into the. spray head.
The flow sensor preferably comprises a movable vane mounted in the duct.
The; valve member may comprise -a resilient . member urgeable against an aperture in the receiving means which aperture leads to a port in the duct.
• ■ . Preferably the vanr is pivotally mounted and the valve member is arranged on a lever rigidly mounted on the . vane . . · · The valve may be spring urged against the said aperture (e.g. by a spring connected to the vane).
Alternatively means may be provided to urge 'the valve against the aperture just before fluid is. ejected. into the spray head, the flow sensor acting to release said means In the case where the valve is biased to the closed position, the device may include means for relieving the seating pressure of the valve when the device is not in use. ■ '■ Some specific examples of inhaling devices constructed according to the invention will now be described with reference to the accompanying drawings, in which: Figure 1 is a side view in section of an inhaling device; Figure 2 is. a sectional view of one alternative form of device, and Figure 3 is a sectional view of another alternative device · Referring to Figure 1, an inhalin device for dispensing medicament. to , for instance, asthma sufferers comprises a plastics casing 11 having an outlet orifice 12 of a suitable size and shape for insertion into the mouth of a user. The. casing. 11 defines a recess.13-in which there is placed an aerosol-type medicament dispenser l .
The dispenser 14 is of a known type, and incorporates a' metering valve 15 having a spray stem l6, which valve operates to eject into the stem 16 a predetermined amount of medicament when the dispenser 14. is pressed downwards while the stem 16 is supported against movement. The stem is received sealingly in socket 18.
Also fitted within casing 11 is a control assembly comprising a body 17, vane .31, lever 26 and socket 19. The socket 19 and body 17 are rigidly interconnected and lever 26, which is integral with vane 31, is pivotally mounted in the body 17 by means of a saddle 26a which straddles a flange 26b.
Socket 19 receives socket. l8 and in the cavity between the two sockets there is arranged aJ resilient valve disc 22. Socket 19 has an outlet port 21. Valve member 22 is movable towards the socket l8 to seal, an outlet 18a in the lower end thereof. An operating rod 2,3 mounted on the end of lever 26 passes through a bore 24 in socket 19 and engages the valve disc.
The control assembly lies partially within an air duct 28 leading from a set of inlet holes (not shown) at 29 on one side of vane 31 and down the other side to the outlet orifice 12. -The air_vane 31 and the lever 26- are so dimensioned that air entering by the inlet holes 2-9 must pass up one side of the vane, over the top of the vane and down past the sockets l8 and 19 to reach the outlet orifice 12. A spring 30 connects the lever to the casing 11, and biases it in a counter clockwise .direction. As a result of such biasing, the rod 23 is moved upwards and holds the valve member 22 against the socket l8 to seal it, while the air vane 31 is moved to a position in which it effectively closes duct 28 completely. A dust cap 2 is provided, which may be fitted over the outlet orifice 12, and the dust cap includes a tongue 33 engageable with an extension 3^4 on the lever 26 to move it downwardly, thus releasing the pressure on the valve member 22 when the device is not in use. The dust cap has a further tongue ■ 32a to close the inlet holes.. · .In use of the device, the asthma sufferer inserts the outlet orifice- 12 into his mouth, depresses the dispenser 14, and draws a breath. Depression of the dispenser l4 makes available partly in the stem 16 and partly in socket 18 a dose of medicament, but because the valve member 22 is held against the socket 18 by the rod 23, this dose is held back. When the user. draws breath, however, a partial vacuum is created in the. egion of the valve member, with the result that the air pressure on the. side of the vane 31 in communication with the inlet holes moves the vane, and thus the lever 26, in a clockwise direction, allowing air to flow past the vane. As the' lever- 26 moves the valve member 22 is withdrawn from the socket 18, so that the air flowing past the valve assembly entrains the dose of medicament which passes from the stem 16 and socket 18 into the duct. Thus it will be seen that by the use of this device the asthma sufferer receives the dose of medicament at the very beginning'of the intake of breath, thus ensuring that the medicament penetrates into the smallest airways in the lungs .
Two alternative forms of device are shown in Figures 2 and , in which like parts have been given like reference numerals. In both these devices, the valve member 22 is not moved into the sealing position until the moment at which the device is used. Referring first to Figure 2, the stem 16 of the dispenser I k is fixed relative to the casing 11 and protrudes into the socket 19'. "The operating rod 23 of the valve assembly is mounted on a lever 35 pivoted to the casing lll and is biased away from the valve assembly by a spring 36 connected to the lever 35· On the other end of the lever is a trigger arm 37 engageable by a projection 38 connected to the air vane 31 (which is here pivoted on the casing 11). A further lever 39 is mounted on the casing 11 and is biased in a clockwise direction by a spring 41. One end of the lever 39 is connected by a push rod 42 to the dispenser 14, while the other end is engageable under a step in the trigger arm 37. .
In the use of the device, the air vane 31 is initially in the position shown, blocking the inlet 29· The dispenser 14 is depressed to dispense a dose of medicament and as it is depressed the push rod 42 rotates the lever 39 counter clockwise, so that the outer, end of the lever lifts the trigger arm 37 and the lever 35 and thus raises the push rod, moving the valve member upwards ■ to seal the stem 16 before the dose is actually dispensed. Thus, depression of the dispenser 14 makes the dose available, under pressure, in the stem 16. When the user of the device then sucks at the outlet orifice 12, the partial vacuum, within the air duct 28 results in the 'vane 31 rotating in a counter clockwise direction so that the projection 38 engages the top of the trigger arm and moves ,it away from the lever 39· The lever 35 then drops under the influence of .spring 36, aided by the pressure of the medicament on the valve member 22, and the medicament is then dispensed into the air . v.. · stream from the valve stem 16. When the dispenser 14 is released after breath has been drawn, a reset arm 43, rigidly connected to the lever 39, moves the vane 31 back to its start position.
Referring now to Figure 3, in this embodiment a lever 44 is used to operate dispenser 14; at the end of the lever 44 a vertically moving slide 45 is arranged, which is engageable with a projection 46 on the trigger arm 37. An interlock 47 between the vane 31 and. the trigger arm 37. allows relative vertical movement of the arm and vane but ensures that counter clockwise rotation <3f the vane causes the .trigger arm to move to the left, away from the slide 45. The operating rod 23, the lever 35, the spring ■ 36 and the trigger arm are arranged in a similar manner to that shown in Figure 2, except that the fulcrum is positioned between the operating rod and the trigger arm rather than at one end of the lever.
In use 6f the device shown in Figure 3, the lever , 44 is depressed, thus depressing the dispenser 14 to release a dose of medicament and at the same time' depressing the trigger arm 37 via the slide 4 and the projection 46. This causes the lever 35 to rotate in a clockwise direction pushing the operating rod 23 and therefore the valve member 22 upwards to seal the dose dispensed in the stem l6 as in the other embodiments described. When the user draws breath through the orifice 12, the vane 31 is rotated counter clockwise v and. draws the projection 46' away from the slide 45, and when they disengage the spring 36 causes the valve assembly to dispense the dose available in the stem 16, the operating rod 23 being moved downwards. This arrangement has certain advantages, from a mechanical point of view, as the distances moved by the parts involved are increased, thus allowing greater manufacturing tolerances. Furthermore, the force required to operate the device is reduced by the use of the lever 44.' Generally, the invention provides a device by which the- user can obtain- the dose of medicament at the correct point in his drawing in of breath, and this is achieved in an arrangement in which the forces required are very low and the parts are not stressed except over the very short period of use. Previous devices. have consisted of an arrangement in which an air vane is linked to the dispenser, it being necessary for the patient to suck at the orifice before, and during, depression of. the dispenser. The air vane is held' iri; a closed position until such time as the dispenser is operated, so 'that the patient obtains no air at all until such time as he operates the dispenser, and clearly this is undesirable for asthma sufferers who are in any. case short of breath. In other devices, the drawing of breath by the patient triggers an arrangement which operates the metering valve directly, utilising the energy- .stored in a spring to overcome the considerable resistance (about 5 lbs) of the metering device. The present invention, on the other hand, utilises a two stage action in which the fluid is dispensed and stored by hand pressure on the dispenser and' is released by an air vane arrangement on drawing breath, which release -requires very little pressure.
The invention includes a miniature version of the present device operated by a battery. In this version ' there is no obstruction to the flow of air, but the commencement of flow is sensed by .a "Pirani" type of gauge in' a bridge circuit (e.g. a hot wire anemometer), and a tiny solenoid is switched to release the dose.
The above examples of devices may be utilised with the alternative aerosols described although it may be desirable" to provide means; which prevent operation of the valve member 22 after the dispenser has been pressed downwardly until the dispenser is released. This would ensure that the user receives a single discrete dose at the start of drawing breath.
For instance .-means may be provided to lock the vane 31 in the position shown in Figure 1 (i.e. the sealing position) when the dispenser 14 is in the depressed position . ' -· Although the invention has been described with particular reference to devices for dispensing medicament to asthma sufferers, it will be clear that the general principles of the invention may be extended to a far wider field.

Claims (1)

1. 39916/2 5. A device as claimed in claim k in whic the vane is pivotally mounted and the valve member is arranged on a lever rigidly connected to the vane* 6. A device as claimed in any one of the preceding claims in hioh the valve member comprises a resilient member urgeable against a aperture in the receiving means whioh aperture leads to a port in the duct. 7· A device as claimed in claim 6 in which the valve is spring urged against the Attorney for Applicabts 12
IL39916A 1971-07-19 1972-07-16 Device for dispensing fluids IL39916A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3379371A GB1392192A (en) 1971-07-19 1971-07-19 Devices for dispensing fluids from pressurised dispensing con tainers

Publications (2)

Publication Number Publication Date
IL39916A0 IL39916A0 (en) 1972-09-28
IL39916A true IL39916A (en) 1974-11-29

Family

ID=10357511

Family Applications (1)

Application Number Title Priority Date Filing Date
IL39916A IL39916A (en) 1971-07-19 1972-07-16 Device for dispensing fluids

Country Status (23)

Country Link
US (1) US3826413A (en)
AR (1) AR193533A1 (en)
AT (1) AT335047B (en)
BE (1) BE786421A (en)
BR (1) BR7204762D0 (en)
CA (1) CA961458A (en)
CH (1) CH555681A (en)
CS (1) CS164928B2 (en)
DE (1) DE2235247A1 (en)
DK (1) DK136018B (en)
EG (1) EG10691A (en)
ES (1) ES404952A1 (en)
FR (1) FR2146261B1 (en)
GB (1) GB1392192A (en)
HU (1) HU168483B (en)
IE (1) IE36534B1 (en)
IL (1) IL39916A (en)
NL (1) NL7209897A (en)
NO (2) NO134730C (en)
PH (1) PH9864A (en)
PL (1) PL85732B1 (en)
SE (1) SE383101B (en)
ZA (1) ZA724383B (en)

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Also Published As

Publication number Publication date
AR193533A1 (en) 1973-04-30
FR2146261A1 (en) 1973-03-02
IE36534B1 (en) 1976-11-24
US3826413A (en) 1974-07-30
NO134730C (en) 1976-12-08
ES404952A1 (en) 1975-06-16
NL7209897A (en) 1973-01-23
NO134730L (en) 1900-01-01
AU4469672A (en) 1974-01-24
CS164928B2 (en) 1975-11-28
AT335047B (en) 1977-02-25
NO134730B (en) 1976-08-30
HU168483B (en) 1976-05-28
ZA724383B (en) 1974-02-27
BE786421A (en) 1972-11-16
EG10691A (en) 1976-04-30
ATA604272A (en) 1976-06-15
IE36534L (en) 1973-01-19
PL85732B1 (en) 1976-04-30
SE383101B (en) 1976-03-01
DK136018C (en) 1978-01-02
FR2146261B1 (en) 1977-09-02
PH9864A (en) 1976-05-11
BR7204762D0 (en) 1973-07-10
DK136018B (en) 1977-08-01
DE2235247A1 (en) 1973-02-01
CA961458A (en) 1975-01-21
GB1392192A (en) 1975-04-30
IL39916A0 (en) 1972-09-28
CH555681A (en) 1974-11-15

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