MEDICAL AEROSOL DISPENSING DEVICE

Abstract: An aerosol dispensing device comprises a socket 1 for an aerosol container 3, said socket having a discharge tube 6 for aerosol and a protective member arranged to the socket and moveable between a use position for the device and a storage position in which the protective member covers the discharge tube as well as the open end of the socket and an aerosol container held therein, which protective member consists of a casing 9 suspended rotably around two spindle means 7 having a common axis extending through a central part of the socket across the longitudinal direction thereof.

Description: Medical Asrosol Dispensing Device DESCRINTION Technical Field The present invention is related to an aerosol dispensing device of the kind where an aerosol container is placed in a socket, through which an aerosol may be dispensed, and which is provided with a means protecting the dispensing opening and the aerosol container on storage. In particular, the invention is related to a device for administration of medicinally or hygienically active substances in aerosol form to the respiratory organs of a patient, primarily on administration into the nose. An object of the invention is to obtain an aerosol dispensing device having improved protection of the dispensing opening and the aerosol container. A further object is to obtain a device wherein the protective means does not incur a risk of disturbing the function of the device on aerosol dispensing. State of the art Administration of medicinally or hygienically active compounds in aerosol form is employed for treatment of the nasal cavities, the oral cavity, the throat and the inner parts of the respiratory organs. The aerosol is thereby usually provided in an aerosol container placed in a socket having a spray orifice from which doses of aerosol may be dispensed. Dispensing usually takes place by activation of the valve mechanism of the container by the patient, by depressing the end of the container into the socket. In order to avoid congamination of the dispensing opening of the devics, said opening bas often been provided with some kind of protective lid, which may have been combinent with a protective means for the end of the containers which lid concurrently prevents inUdvertent dispensing. Devices having such protective means are shown in e.g. U.S. Patent SpecIfication No 3 429 310 and British Patent Specification No. 1 402 838. The device according to the firstnlentisned specification, in which a protective cover is both turnable and axially displaceable on a cylindrical socket, is impaired by risks of disturbed function in that the cover may seize or be locked on the socket, and turning and/or depression on aerosol dispensing is prevented The manner of use may further not be obvious to the patient. Finally, the device does not permit a sufficient flow of air therethrough on aerosol dispensing. The device according to the second specification mentioned has a protective lid attached at the upper end of the socket via a flexible connecting member. Said protective cover requires a considerable space in the open position and may disturb the function of the device by falling down. On aerosol inhalation through the nose the lid will be positioned close to the eyes which is inconvenient to the patient. Description of the invention According to the present invention there is provided an aerosol dispensing device which fulfils the objects stated above, avoiding the drawbacks in previously non constructions and having the further advantage that the protective member, in the use position of the device, serves as a support and renders the device more secure and convenient to hold in hand. The aerosol dispensing device according to the invention comprises a socket, said socket having an open end opening across the iongitudinal- direction thereof and being aed to receive a hold an aerosol containi; said sackut L-eing closed a4; the opposite Fnd thereof and heving, in the interior thersof, a spraying nozzle adapted to interact with a dosage valve on the aerosol container, and further having a discharge tube For an aerosol; ; said socket having attached thereto a protective member moveable between a use position for the device and a storage position, at which the protective member covers the discharge tube as well as the open end of the socket and an aerosol container held therein. The device is characterized in that the protective member consists of a casing suspended rotably around two spindle means having a common axis extending through a central part of the socket, across the longitudinal direction thereof. According to a preferred embodiment of the invention the casing is lockable in the use position and preferably also in the storage position by means of interacting members on the casing and on the socket. The socket making part of the device according to the invention is adapted to receive an aerosol container. It should also allow passage of inhalation airalongthe sides of the aerosol container. Within the scope of the invention it is possible to vary the shape of the socket, which thus may have e.g. a round or oval cross-section. According to an especially preferred embodiment the socket has a rectangular, preferably a square cross-section. Thereby the socket will have two planar lateral surfaces on each side of tje surface where the discharge tube is placed. The spindle means for the casing are then positioned on said lateral surfaces. With a corresponding design of the casing where the lateral portions provided with spindle means are extended to plane parallel lateral walls, an improved tightening in the storage position and an improved trol of the movement of the casing are achieved The device of the present invention is urter described with reference to the enclosed drawings, in which Fig. l shows a side view of a device according to an embodiment of the invention, in the use position, provided with an aerosol container, Fig. 2 shows a side view of the device according to fig. 1 in the storage position, Fig. 3 shows a view from above of a socket making part of the device according to fig. 1, Fig. 4 shows a section along the line IV-IV through the socket in fig. 3, Fig. 5 shows a view of a casing making part of the device according to fig. 1, and Fig. 6 and Fig. 7 illustrate how a device according to the invention may be held in hand on dispensing of an aerosol. In the drawings denotes a socket. The socket consists of a hollow member having substantially square cross-section, the upper end 2 of which member is open and may receive an aerosol container 3, and the lower closed end 4 of which is provided with an internal spraying nozzle 5 A dosage valve in the aerosol container opens into a tube fitted into the spraying nozzle. In front of and in line with the obliquely upwardly directed orifice of the spray nozzle a discharge tube 6 is arranged, designed to be introduceable into the nostri't of a patient. Two opposite lateral walls of the socket 1 have, as spindle means, two studs 7 placed substantially at the centre of said lateral walls. Said studs fit into two holec on a casing a to the formation of a joint, around whici the casing is turnable between the use position and the storage position. The lower edge 10 of the front wall OT the socket 1 is slightly extended in the forward direction in order to improve the tightening against the casing . The diagonally opposite edge 11 is extended to such extern that it cannot be introduced into the casing. The edge 11 thus limits the mutual movability of the casing and the socket so that only the closed end of the socket may be swung through the casing. The wall 12 of the casing is shaped like a rounded shell, which continues into two planar lateral ijalls wherein the holes 8 are made. An inwardly directed projection 13 on each lateral wall of the casing fits into two corresponding cavities 14 and 15 on each of the lateral walls of the socket to obtain a releasable locking of the casing in the use position and the storage position of the device respectively. The cover finally has a planar support edge 16 and a concave wall section, which facilitate the handling of the device. The device according to the invention may be carried locked in its storage position in the patient's pocket, handbag or the like. On use the device is held by the casing 9. By pressing the closed end of ths socket said socket is easily rotated through the casing and then locked in the use position. The device is held in hand, suitably as shown in figs. 6 or 7, and the discharge tube is introduced into the patient's nostril whereafter the aerosol container is depressed to release a dosage of drug. Concurrently with said releasing the patient may inhale through the device. After use the device is returned to the storage position. The device of the invention may preferably he made to be disposed of after consumption of one aerosol container. In the alternative, the aerosol container may be exchange- able. The devien is suitably provided with the aernsol contai er p aced in the socket The device according to the invention has a very compact design and may be hidden in the hand on use. The discreet use thus made possible has been found desirable to many patients. The compact design is enabled by the central positioning of the spindle means. In the device according to fig. 1 the axis of the spindle means Is thus close to a point half-way between the edges 10 arid ll of the socket, and a point half-way between the corresponding edges of the casing. Within the scope of the invention it is possible to allow the axis of the spindle means to deviate somewhat from said points. With increasing distance7 however, the objects of the invention are achieved to a decreasing degree. Further, one may alternatively design the device thus that the open end of the socket, having the aerosol container held therein, may be swung through the casing. A material for manufacture of the device is suitably a plastic material which may be shaped in a manner known per se. The casing can suitably be made of transparent material, rendering possible text on the aerosol container readable therethrough. Best mode of carrying out the invention The embodiment shown in the drawings is preferred, and it is suitably prepared by injection moulding of polypropylene for the socket and styrene acrylonitrlle (SAN) for the casing.

Claims: 1. An aerosol dispensing device camprising a socket (1) ; said socket having an open and (2) opening across the longitudinal direction thereof and being adapted to receive and hold an aerosol container (3); said socket being closed at the opposite end (4) thereof and having, in the interier therebf, a spraying nozzle (5) adopted to interact with a dosage valve on the aerosol container3 and further having a discharge tube (6) for an aerosol; said socket having attached thereto a protective member moveable between a use position for the device and a storage position, at which the protective member covers the discharge tube as well as the open end of the socket and an aerosol container held therein; said device being characterized in that the protective member consists of a casing t9) suspended rotably around two spindle e neans (7) having a common axis extending through a central part of the socket, across the longitudinal direction thereof 2. An aerosol dispensing device according to claim 13 characterized in that the casing (9) is lockable in the use position by means of Interacting members (13, 14) on the casing and on the socket. 3. An aerosol dispensing device according to claim 1 or claim 2, characterized in that the casing is lockable in the storage position by means of interacting members (13, 15) on the casing and on the socket 4. An aerosol dispensing device according to one or more of tre preccding claime, characterized In that the socket has a rectangular crose-section and that the casing is suapended by means of spindle means on two opposite lateral surfaere of the socket adjecent to the ourface where the discharge tube is piaced.

Inventors: ANDERSSON, JAN ANDERS ROLAND, NYMAN, SVEN GOSTA, SNELLMAN-WASENIUS, KAIJA ANNELI, VIRTANEN, RISTO, Nyman, Sven Gösta
Applicants: AKTIEBOLAGET DRACO
Application year: 1982
Main classification: B65D83
IPC codes: A61M11, A61M15