US 2655918 A
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Description (OCR text may contain errors)
Oct. 20, 1953 M, 1 JONES 2,655,918
INHALATION APPARATUS Filed June 18, 1951 2 Sheets-Sheet l A Inventor Jarmam M. L. JBnes WM MW Attorney Oct. 20, 1953 J M. JONES 2,655,918
INHALATION APPARATUS Filed June 18, 1951 2 Sheets-Sheet 2 Inventor Jarma V1 L- 327F485 M 6. AW
Attorney Patented Oct. 20, 195.?
INHALATION APPARATUS Jarman Maldwyn Lloyd Jones, London, England, assignor to Riddell Products Limited, London, England, a British company Application June 18, 1951, Serial No. 232,105 In Great Britain June 27, 1950 1 Claim.
This invention has for its object to provide an improved insulation apparatus of the kind employed for inhaling atomized medicaments and comprising a container for the inhalant, atomizing means in said container and external air compressing means coupled to said atomizin means, and a detachable head portion forming a closure for said container and having a delivery nozzle, mouthpiece or mask for location over or close to the users mouth and/or nose.
It is usual for the aforesaid container to be screwed direct to the head portion and it has been found that the screw threads bind, so making dismantling of the device difiicult or impossible, or else become loose so leading to leakage of the medicament owing to variations in the expansion of the said container and heat portions. This difiiculty is accentuated by the use of different materials for the container head portions respectively, and it will be appreciated that it is necessary to use transparent material for the container so that a user can ascertain whether there is any inhalant therein, whilst the head portion in the interests of economy and ease of manufacture is made from another material.
A more specific object of the present invention is to provide a screwed coupling between the said head and container portions which will not bind or become loosened even under the varying temperature conditions to which the inhaler may be subjected.
Another object is to provide a coupling where the formation of a screw thread on the container is entirely avoided by the provision of a coupling collar which makes a compression joint with the container and a screw-threaded joint with the head portion of the inhaler.
In order that the invention may be well understood, two embodiments thereof will now be described, by way of example only, in conjunction with the accompanying drawings in which:
Figure 1 is a part-sectional elevation of one embodiment of inhalation apparatus according to the invention adapted for use with a mask and shown in operative position, a
Figure 2 is a sectional elevation of a second embodiment of inhalation apparatus according to the invention, and
Figure 3 is a plan view of a bafile.
In the embodiment shown in Fig. 1, the inhalation apparatus is provided with a container I, preferably of transparent material such as cellulose acetate, in which inhalation liquid is stored. the level of which being indicated at 2. A hand bulb 3 serves as a source of compressed air and is connected to the container I by a tube 4. A
single bulb may be used, or a double bulb, 3, 3' may be employed as shown. The second bulb 3' then serves as an air container and ensures an even flow of compressed air into the container l. The said tube 4 is connected through a screwthreaded nipple 5 in the bottom end of the container to an air jet 6 mounted in a rubber washer 8 and extending inside the container. The air jet is of glass and is provided with a fine outlet 1. Mounted adjacent the air jet 6 and inclined at an angle thereto is a further jet 9 through which liquid is entrained when air issues from the air jet, the said further jet 9 also being made of glass and having its inlet end I I) located near the base of the container so as to be immersed in the inhaling medicament with which the container is charged. The upper end of the last mentioned jet is provided with a fine outlet Il positioned close to and directed over, the outlet I of the air jet 6.
The head portion I2 013 the apparatus is preferably moulded from an opaque material such as Bakelite (a registered trade-mark) and consists of a circular base portion I3 having a downwardly extending peripheral flange I 4, said flange being internally threaded as at I5. Mounted on said base portion and integral therewith is a fixed outer sleeve l6, disposed with its axis at right angles to the axis of the said base I3.
A rotatable inner tube II fits within the sleeve with a liquid-tight joint and is adapted to turn within it. This inner tube is of such length as to extend from each end of the sleeve, one end of the tube being adapted to receive an inhalation mask I8, so formed and shaped as to fit over a users mouth and nose. The other end of the tube is formed with a threaded boss 3|. A screw cap 32 engages the boss 3| to bear against the sleeve I'E through a washer 33, thereby holding the inner tube IT in liquid-tight engagement within the sleeve I6, but not so as to prevent rotation of the tube I1 within the sleeve It. The said inner tube is provided with a central passage I9 connecting the mask to a passage 20 extending upwardly and centrally through the base portion I3. The other end of the inner tube is also drilled with a passage 2| connectable to a further passage 22 extending upwardly through the base portion I3 and disposed adjacent the said central passage 20 through the base, such further passage forming a breather opening. In each case the respective pairs of passages are connectable to the container by means of radially drilled holes 23, 24, in the wall of the tube I'I. r
The mask I8 is located on and engages the reduced end 25 of-the inner tube I! by a fiat 26, and by rotating the mask and thereby the inner tube the two passages 20 and 22 through the base portion I3 may be sealed off from their respective connecting passages I9 and 2| in the tube by the wall of the said tube.
A cylindrical downwardly depending sleeve 2'! extends from the base portion 13 in alignment with the .central passage 20 therethrough, and is such that when .the head portion isconnected to the container it surrounds the outlets i and l i of the aforementioned jets 6 and 9 respectively.
A coupling collar 28 is provided, being preferably of the same material as that from which the head portion I2 is moulded. "The icollar makes a sliding fit around the container 1 ,theupper end of which is provided with an outwardly extending flange portion 29 against which collar :28 is adapted to abut. The external diameter of the collar 28 is slightly greater than that of .the said flange 29 on the container, and the upper'part of said collar is externally threaded for engagement with the internally threaded flange M of the above mentioned base portion I3.
By screwing the collar 2'8firmly into the base portion I3 the top of the container I is held tightly in and against said base therebyproviding an effectively sealed connection. A rubber ring or'like sealing element 35} may be placedbetween the engaging surfaces-ofthe container and base portion.
As shown in the drawing} the annular flange ZB 'isrelatively thin in the direction of its'axis, thereby reducing to a minimum the amount or differential expansion and contraction which must be accommodated in thejoint.
Thus an efiective fluid-tight connection is provided between two components of the inhalation apparatus, each being of diiierent material, which connection does not entail any'direct threaded engagementbetween those two difierent materials.
In use the mask is turnedto operative position, the'position shown in Fig. 1, thereby bringing the various-passages in thehead portion into coincidence, and then by squeezing the hand-bulb compressed air is forced into the container. This induces a'fine atomisationof liquid to issue from the liquid jet 9, such "atomisation being vaporized atthe air-jet outlet I and thevapour then passing-up the dependingsleeve 21 into the head por- ,tion 12 and thence to the mask 18. The apparemovable closure 52 so as to prevent leakage or evaporation when the apparatus is not in use.
The above mentioned cap portion is provided witha baseflange 53 which isinternally threaded for engagement by a collar '54 similar to the collar already described, and the container is provided with an outwardly directed peripherial flange 55 against which the inner face of the collar abuts. The container can therefore be connected to the cap. portion bymeans-of a fluid-tight compression joint and the latter is not adversely aiiected by differencesin'thecoefficients of expansion of the material :fromwhich the cap portion and conitainer are made.
As in the case of the earlier example. the container is preferably made from cellulose acetate or other transparent material and the cap portion is preferably moulded "from opaque plastic material.
Preferably, a rubber ring or like sealing element 6B is placed between the engaging surfaces of thecontainerand eap portion as in the first embodiment. "If desiredaabafiie may be interposed between the said sealingjring 60 and'the capportion for the purpose of improving atomisation such bafii'efor'instancebeing in the form-0f a disc 6| as shown inFigureB. V
'It will be understood th'at'various changes and modifications may "be made without departing from the scope of't'he inven'tion. Ashas been aid,
- single or double compression bulbs maybe used,
while the embodiment shown in 'Fig. 2 may also be adapted to be used with a "face-mask if desired-similar'to that Shown in Fig. 1.
Furthermore, the 'col1ar'could 'be channel:
shaped in cross-section, the outer wall of the channel being internal-1y threaded to engage an externally threaded portion of the head por tion, the inner wall of the channel abutting against the flange on "the container.
Tatusmy be filled through the. passage 2| in t ii inner tube remote from the end carrying the mask. n
.When not in use, the mask, and thereby the inner tube 11 is turned to inoperative position whereby the passages extending through the base 5 portion are completely sealed ofi 'by the inner tube.
In another embodiment of the present invention, suitable for carrying -in the pocket and shown injFig. 2, the inhalation apparatus again comprises a transparent container 4] for the inhalant liquid, the level of which is indicated at 42,, such container having atomisation producing means 55., 49 similar for instance to those already described, held in a rubber washer 48 and connected to a hand bulb or other air compress ing means 53, .a connecting member 44 held in the bulb making threaded engagement as at 45 with the container 4 |.---The=said container instead, however of being detachably connected to a head portion havingaplurality of passages and a mask, is connected to a cap pcrtion having a delivery nozzle 51 suitable for being directed into a user's mouth or nostril. The said cap portion maybe of dome like shape with the delivery nozzle extending therefrom at an angle, and the outlet end of the said nozzle maybe provided with a portionpro'viding a circular opening at its outer end, said cylindrical portion having a thin annular flange extending outwardly therefrom at its open end, means in said container for atomizing said inhalant, means for supplying compressed air to said atomizing means, a head portion formed of material having a different coeflicient of expansion fromthe material of said container. said head portion having afl'at annular surface forming .a seat for said thin annular hangs on said container and being formed with an inter nallythreaded cylindrical flange surrounding said seating surface and said annular flange, and a clamping collar formed of the same material as said head portion and having a portion extending into said annular flange and externally screw threaded to engage the internal threads of said cylindrical flange, said clamping collar having a further portion thereof positioned to engage the rear face of said annular flange and to press the front face thereof into sealing engagement with the annular seating surface of said head portion.
JARMAN MALDWYN "LLOYD JONES.
References Cited in the file of this patent UNITED STATES PA'TENTS 7 Number Name v Date 447,064 vShurtleff Feb. 24, 1891 2,202,701 Lehmann' May 28, 1940 2,421,359 Sutherland May 27, 194?