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WO1998004307A1 - Ensemble embout-recharge pour un inhalateur de poudre - Google Patents

Ensemble embout-recharge pour un inhalateur de poudre Download PDF

Info

Publication number
WO1998004307A1
WO1998004307A1 PCT/DE1997/001171 DE9701171W WO9804307A1 WO 1998004307 A1 WO1998004307 A1 WO 1998004307A1 DE 9701171 W DE9701171 W DE 9701171W WO 9804307 A1 WO9804307 A1 WO 9804307A1
Authority
WO
WIPO (PCT)
Prior art keywords
mouthpiece
refill unit
housing
unit according
drive unit
Prior art date
Application number
PCT/DE1997/001171
Other languages
German (de)
English (en)
Inventor
Roland Kneer
Christoph Heiland
Original Assignee
Gaplast Gmbh
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 Gaplast Gmbh filed Critical Gaplast Gmbh
Priority to DE29780391U priority Critical patent/DE29780391U1/de
Priority to AU32532/97A priority patent/AU3253297A/en
Publication of WO1998004307A1 publication Critical patent/WO1998004307A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES 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
    • A61M15/00—Inhalators
    • A61M15/0065—Inhalators with dosage or measuring devices
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES 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
    • A61M2202/00—Special media to be introduced, removed or treated
    • A61M2202/06—Solids
    • A61M2202/064—Powder
    • A61M2202/066—Powder made from a compacted product by abrading

Definitions

  • the invention relates to a mouthpiece refill unit for a powder inhaler, with a mouthpiece which can be fastened to the upper end region of the housing of a drive unit provided with a rotatable abrasion unit, in particular a milling machine, a tablet holder being held axially displaceably in the mouthpiece, on which one Tablet is attached, which rests on the router under spring pressure.
  • a patient inhales active substances that are rubbed off or milled off in an exact dosage from a tablet, which usually consists of compressed milk sugar, into which the active substances are mixed.
  • a tablet which usually consists of compressed milk sugar, into which the active substances are mixed.
  • a tablet is intended for about 300 applications, for example, after which the mouthpiece of the powder inhaler is exchanged for a mouthpiece provided with a new tablet, while the drive unit of the powder inhaler, which contains the movement mechanism for the milling cutter, continues to be used. Since the lungs are increasingly used as a receiving organ for active substances, such powder inhalers are becoming increasingly popular.
  • the upper part of the powder inhaler namely the mouthpiece with the tablet holder held axially therein and the tablet generally adhered to the lower end thereof, is replaced from time to time while the drive unit is still used.
  • the problem here is that the mouthpiece refill unit should be securely and precisely attachable to the drive unit and should be able to be detached from the patient without the aid of a tool, and the patient must avoid inadvertent separation of the mouthpiece and drive unit.
  • the mouthpiece refill unit For precise dosing of the abrasion of the tablet it is of paramount importance that the mouthpiece refill unit always sits precisely on the drive unit.
  • the tablet holder is guided axially displaceably in the mouthpiece and is biased against the milling cutter by means of a helical spring, so that the tablet holder is advanced in the direction of the milling cutter with progressive abrasion of the tablet.
  • a helical spring so that the tablet holder is advanced in the direction of the milling cutter with progressive abrasion of the tablet.
  • the present invention has for its object to solve the problems listed above.
  • the mouthpiece can be fastened to the housing of the drive unit by means of a latching device, and circumferential toothings with oblique flanks are formed on both housings which are snapped together in this way and which engage in one another when the two housings are fastened.
  • these teeth ensure a perfect fit of the mouthpiece refill unit on the drive unit, and they also make it possible, by means of a relative rotary movement between the mouthpiece and the housing, to easily release the latching between these two parts even when a great holding force is exerted by the latching device is, which makes it practically impossible to pull the mouthpiece refill unit from the drive unit in the axial direction.
  • the flanks of the toothing act as guide surfaces which convert the rotary movement into an axial movement.
  • the release force can be set to the desired level by the angle of inclination of the flanks.
  • the individual teeth of the toothings have oblique flanks on both sides, the latching connection can be released by turning in both directions.
  • inclined flanks can only be provided on one side of the teeth, so that the locking can only be released in one direction of rotation.
  • a circumferential, cross-sectionally approximately semicircular bead is provided as the latching device, which can snap into a circumferential groove of the other housing.
  • the entry of the bead into the groove is due to elastic deformation of the peripheral area in front of the groove and of the ring bulge, wherein, for example, PP, PE, POM or PBT is used as the material for the mouthpiece refill unit.
  • the mouthpiece refill unit is expediently made by injection molding.
  • the annular bead or the outwardly projecting annular projection is formed in the region of the upper end section of the housing of the drive unit, while the annular groove is formed in the associated inner wall of the mouthpiece.
  • the mouthpiece is slipped over the upper end section of the housing of the drive unit and engages in the manner described, in that the toothings preferably engage in a form-fitting manner over the entire circumferential area.
  • the tooth flanks preferably have the same angle of inclination on both sides of the teeth, so that the same force has to be applied in both directions of rotation to release the latching.
  • the mouthpiece contains an axially immovable guide ring for the tablet holder, this guide ring preferably being held on the inside of a radially inner ring wall of the mouthpiece, which is integral with the bell-shaped outer wall of the mouthpiece, which causes the latching connection to the housing of the drive unit is trained.
  • the guide ring has on its outside a circumferential, in the vertical section circular arc-shaped curvature, which sits in a form-fitting manner in a circumferential, likewise circular-arc-shaped depression in the inner surface of the ring wall.
  • the guide ring is made of a material with a low coefficient of friction, e.g. Teflon, or it is coated with such a material.
  • Teflon a material with a low coefficient of friction
  • This slip-stick effect of known mouthpiece refill units is avoided by the guide ring with a low coefficient of friction.
  • the above-mentioned gimbal suspension of the guide ring ensures that the tablet always lies snugly on the milling cutter, because if an inclination angle between the tablet underside and the top of the milling cutter is desired, the guide ring is pivoted in the circumferential, trough-shaped depression as a result of spring force that the tablet rests on the milling machine over the entire surface. Since the slip-stick conditions described above are reliably avoided, a constant amount of abrasion is guaranteed.
  • This holder and guidance of the tablet holder is an independent idea of the invention.
  • the toothing also makes it possible that only the mouthpiece refill unit belonging to a specific drive unit can be assembled with the drive unit by these two parts receiving a certain, matching number of teeth as coding. In this way it can be prevented that a mouthpiece refill unit provided for another drive unit with a different dosage is used, which would be associated with a great danger for the patient.
  • the mouthpiece refill unit according to the invention can be produced with a simple tool without a slide in the injection molding process, the bead area being able to be demolded.
  • the mouthpiece refill unit can be attached to the housing of the drive unit with a large holding force, namely by appropriate dimensioning of the latching device, but a relatively low release force, which can be predetermined by the choice of the inclination of the tooth flanks, is sufficient to remove the mouthpiece refill unit.
  • the intended dosage is met by the tablet's extremely precise guidance.
  • Figure 1 shows the components of a mouthpiece refill in a partially sectioned side view.
  • Fig. 2 shows the assembled state of the mouthpiece refill unit according to Fig. 1 and
  • Fig. 3 shows a vertical section through a second embodiment of the mouthpiece refill unit.
  • Fig. 1 shows the first aspect of the present invention in a powder inhaler, the three main components of the drive unit 1, mouthpiece refill unit 2 and protective cap 3 is shown only with the details relating to the attachment of these parts to each other.
  • the outer housing of the drive unit 1 has a first cylindrical housing section 4, an adjoining, cross-sectionally reduced cylindrical housing section 5 with a flat, curved, annular projection 6 for clamping the protective cap 3 (see FIG. 2), and a further connecting, essentially cylindrical housing section 7, which has in the lower area an externally formed toothing 8 with right and left oblique flanks 9, 10 with the same angle of inclination and at a distance above an annular circumferential bead-like projection 11.
  • the mouthpiece refill unit of which only the outer housing is shown in FIG. 1, contains on the inside of the lower edge section a toothing 12 which has the same shape as the toothing 8 with correspondingly inclined tooth flanks 9, 10.
  • annular circumferential groove 13 into which the annular projection 11 engages when the mouthpiece refill unit 2 with its outer housing is pushed over the wall section 7 of the drive unit 1.
  • the annular projection 11 snaps into the groove 13, while the toothings 8 and 12 engage in one another in a form-fitting manner.
  • Fig. 2 shows the assembled state of the powder inhaler with the protective cap 3 attached, which has a slightly curved annular circumferential groove 14 in the inner wall for receiving the annular projection 6.
  • Fig. 2 also shows that the mouthpiece refill unit 2 is seated in the protective cap 3 without radial play.
  • the protective cap 3 can also be used as a handle to fasten the mouthpiece refill unit 2 on the drive unit 1 by bringing the protective cap 3 into the position shown in FIG. 2, in which the mouthpiece refill unit 2 with the drive unit 1 is locked.
  • Fig. 3 shows a mouthpiece refill unit 15 in a vertical section.
  • the features of a second aspect of the present invention are shown in the mouthpiece refill unit 15, namely the holding and guiding of the tablet holder 16 according to the invention, to the underside of which a tablet 17 is glued.
  • the tablet 17 has an annular shape and, with its underside 18, ie more precisely, should always lie snugly with its entire lower surface on a milling cutter, which is not shown in FIG. 3.
  • the mouthpiece refill unit 15 has a cylindrical inner wall 19 which surrounds the cylinder wall 20 of the tablet holder 16 with a small radial distance.
  • the curvature 23 has a longer extension than the depression 21, as a result of which the guide ring 22 is spaced apart in its upper and lower end section from the inner wall of the ring wall 19. This provides the guide ring 22 with the necessary freedom of movement in order to be pivoted in all directions about the central longitudinal axis 24 of the mouthpiece refill unit 25.
  • the inner wall 25 of the guide ring 22 has a cylindrical shape and lies against the outer wall of the tablet holder 16 in order to serve as a guide.
  • the tablet holder 16 has in its lower region an outwardly facing annular shoulder 26 which serves as a spring seat for a spiral compression spring 27 which is supported at the upper end of an annular space 28 of the mouthpiece refill unit.
  • the spiral spring 27 tensions the tablet holder 16 with the tablet 18 in the direction of the arrow 28, ie it constantly presses the underside of the tablet 18 against the milling cutter.
  • a plurality of radially outwardly projecting lugs 29 are formed on the tablet holder 16 and are guided in axial recesses in the radially outer ring wall 30, as a result of which the tablet holder 16 is connected to the mouthpiece refill unit in a rotationally fixed manner.
  • the ring wall 30 is surrounded by an approximately bell-shaped outer wall 31 of the mouthpiece refill unit 15, which is fastened to the housing of the drive unit or locked with it. Although this is not shown in FIG. 3, this attachment can be carried out in the manner shown in FIGS. 1 and 2. In other words, the described details of FIG. 3 can be provided in the embodiment according to FIGS. 1 and 2.

Landscapes

  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • Pulmonology (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Biophysics (AREA)
  • Hematology (AREA)
  • Bioinformatics & Cheminformatics (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Medicinal Preparation (AREA)
  • External Artificial Organs (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)

Abstract

L'invention concerne un inhalateur de poudre, comportant un embout pouvant être fixé de manière interchangeable sur la zone d'extrémité supérieure du boîtier d'une unité d'entraînement. L'embout abrite un porte-comprimé placé de manière à coulisser dans le sens axial, sur lequel est collé un comprimé qui, sous la pression d'un ressort, repose sur une fraise de l'unité d'entraînement. L'embout est encliqueté sur le boîtier de l'unité d'entraînement, les deux éléments présentant des dentures périphériques à flancs obliques qui viennent en contact l'une avec l'autre par liaison de forme. Lors d'un mouvement de rotation entre l'embout et le boîtier, les flancs de la denture agissent en tant que surfaces de guidage pour libérer l'encliquetage.
PCT/DE1997/001171 1996-07-24 1997-06-11 Ensemble embout-recharge pour un inhalateur de poudre WO1998004307A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE29780391U DE29780391U1 (de) 1996-07-24 1997-06-11 Mundstück-Nachfülleinheit für einen Pulverinhalator
AU32532/97A AU3253297A (en) 1996-07-24 1997-06-11 Mouthpiece-refill unit for a powder inhaler

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19629944.6 1996-07-24
DE1996129944 DE19629944C2 (de) 1996-07-24 1996-07-24 Pulverinhalator

Publications (1)

Publication Number Publication Date
WO1998004307A1 true WO1998004307A1 (fr) 1998-02-05

Family

ID=7800745

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1997/001171 WO1998004307A1 (fr) 1996-07-24 1997-06-11 Ensemble embout-recharge pour un inhalateur de poudre

Country Status (3)

Country Link
AU (1) AU3253297A (fr)
DE (2) DE19629944C2 (fr)
WO (1) WO1998004307A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11937634B1 (en) 2023-05-25 2024-03-26 Next Level Ventures LLC Vaping mouthpiece locking structure

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007058112A1 (de) * 2007-12-03 2009-06-04 Boehringer Ingelheim Pharma Gmbh & Co. Kg Pulverinhalator mit Wirkstofftablette

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3248021A (en) * 1962-11-26 1966-04-26 Calmar Inc Liquid dispenser
EP0055954A2 (fr) * 1981-01-05 1982-07-14 L'oreal Flacon à partie(s) pliante(s) ou souple(s)
WO1993024165A1 (fr) * 1992-05-29 1993-12-09 Ggu Gesellschaft Für Gesundheits- Und Umweltforschung Mbh & Co. Vertriebs Kg Dispositif generateur de particules inhalables de substances actives
DE4429707C1 (de) * 1994-08-04 1996-02-01 Bernhard Dipl Ing Hugemann Inhalator mit integrierter, verfestigter, ringförmiger Wirkstofftablette

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE6917819U (de) * 1969-05-02 1969-08-21 Siemens Ag Schutzgehaeuse aus isolierstoff fuer eisenkern von summenstromwandlern
US5176132A (en) * 1989-05-31 1993-01-05 Fisons Plc Medicament inhalation device and formulation
DE4027390C2 (de) * 1990-08-30 1994-11-03 Boehringer Ingelheim Kg Treibgasfreies Inhalationsgerät

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3248021A (en) * 1962-11-26 1966-04-26 Calmar Inc Liquid dispenser
EP0055954A2 (fr) * 1981-01-05 1982-07-14 L'oreal Flacon à partie(s) pliante(s) ou souple(s)
WO1993024165A1 (fr) * 1992-05-29 1993-12-09 Ggu Gesellschaft Für Gesundheits- Und Umweltforschung Mbh & Co. Vertriebs Kg Dispositif generateur de particules inhalables de substances actives
DE4429707C1 (de) * 1994-08-04 1996-02-01 Bernhard Dipl Ing Hugemann Inhalator mit integrierter, verfestigter, ringförmiger Wirkstofftablette

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11937634B1 (en) 2023-05-25 2024-03-26 Next Level Ventures LLC Vaping mouthpiece locking structure
US11937633B1 (en) 2023-05-25 2024-03-26 Next Level Ventures LLC Vaping mouthpiece locking structure

Also Published As

Publication number Publication date
DE29780391U1 (de) 1998-10-22
DE19629944C2 (de) 2003-04-24
DE19629944A1 (de) 1998-02-05
AU3253297A (en) 1998-02-20

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