Surgery – Respiratory method or device – Means for mixing treating agent with respiratory gas
Patent
1995-03-07
1997-08-19
Burr, Edgar S.
Surgery
Respiratory method or device
Means for mixing treating agent with respiratory gas
12820323, A61M 1500
Patent
active
056577494
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
This invention relates to an inhalation device for use in the inhalation of material in powder form. More particularly, it relates to a device by means of which medicament in powder form can be inhaled, and it is so described below.
SUMMARY OF THE INVENTION
According to the present invention there is provided an inhalation device by means of which material in powder form can be inhaled, comprising means holding a powder container having a powder-containing depression therein at a use station, and inhalation means for enabling the powder to be inhaled from a container at the use station, said inhalation means comprising an outlet communicating with the open container by a passage, said passage comprising wall means which cooperate with the said depression to define a venturi.
The use of a venturi is advantageous in that it provides for rapid and substantially complete emptying of the container.
The invention further provides for the use of such an inhalation means in an inhalation device by means of which material in powder form can be inhaled, comprising means for holding a stack of unused powder containers and storage means for receiving each used container from the use station after the powder has been inhaled therefrom and collecting the containers therein.
The invention can also be used with other types of inhalation means such as in an inhalation device as described in GB-A-2242134 in which at least one powder container is defined between two members peelably secured to one another, the device comprising means defining an opening station for the said at least one container, and means for peeling the members apart at the opening station to open the container.
The invention additionally can be used with an inhalation device as described in WO 92/00771 in which there is provided a storage chamber for the powder to be inhaled and a metering member which is intended to provide at least one dispensing cup defining the at least one powder container, the said metering member being moveable between a first position in which a container is presented to the storage chamber to receive a dose of the powder to be inhaled and a second position defined by the use station.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention is further described below with reference to the accompanying drawings, in which:
FIG. 1 is a side view, in section, showing diagrammatically a first embodiment of the present invention;
FIG. 2 is an underplan view of the upper portion of the embodiment shown in FIG. 1, on a larger scale;
FIG. 3 is a sectional view generally taken along line III--III in FIG. 2, but showing only slider and container component of FIG. 2;
FIG. 4 is a perspective view of a device embodying the principles of FIGS. 1 to 3;
FIG. 4a is a view from above showing part of the device of FIG. 4;
FIG. 4b is a vertical section through part of the device of FIG. 4, showing in more detail the design of the mouthpiece thereof;
FIG. 5 shows a single powder container;
FIGS. 6a and 6b show a body and slider mechanism of part of an embodiment employing a rotary slider, with FIG. 6a being a section on line 6a--6a in FIG. 6b; and
FIGS. 7a and 7b, and 8a and 8b are views corresponding to FIGS. 6a and 6b, with the components in other positions;
FIG. 9 is a longitudinal section, with portions cut away, showing a further embodiment;
FIG. 9a shows a cut-away detail at the top of the stack of containers of the embodiment of FIG. 9;
FIGS. 10a and 10b show, diagrammatically and in section, the upper portion of the embodiment of FIGS. 9 and 9a in its inoperative and operative positions, respectively;
FIG. 11 is a section through the stack of unused containers shown in FIG. 10b, taken at right angles thereto, along with a mouthpiece; and
FIG. 12 is a schematic longitudinal section through another embodiment.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
In the embodiment shown in FIGS. 1 to 4, a body 201 is provided within which is formed a generally U-shaped passage 202. This passage comprises a first straight
Burr Edgar S.
Colilla Daniel J.
Glaxo Group Limited
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