DE2318914A1 - VENTILATION MASK - Google Patents

Description

13 480/1 10 / ir

Asmund S. Laerdal, Stavanger, Norway

Ventilation mask

They are ventilation masks for first aid and anesthesia purposes known with an inflatable abutment bead. As a result of the air filling the bulge becomes resilient and elastic and can therefore adapt to the face exactly. This will make the one you want the mask rests tightly on the face.

L Dij & .JI Manufacture of the well-known inflatable mask beads

I.
relatively expensive. They are produced either by folding a film or by injection molding. Here, special measures (gluing, welding) are required for the extensive closing of the molded part so that an interior that is closed off from the outside is created. So that the air remains in the mask bead after it has been inflated, it must

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a special locking device can be provided (see e.g. French patent 7 031 94-3), which makes the mask as a whole also more expensive. Finally, there is another disadvantage that the mask is not always ready for use, because the mask bead has to be inflated beforehand and the locking device has to be actuated in the process.

As far as respiratory masks with a non-inflatable bead have become known, which is filled by a filling, e.g. water (See. British Patent 840 638), is kept in a plump or resilient state, also has such a bead the aforementioned manufacturing disadvantages. Only the locking device comes in Elimination.

After all, you have the non-inflatable bulges for ventilation masks also already produced by vulcanization, which, however, is also relatively expensive.

The invention is based on the object of a ventilation mask to create with a flexible, elastic abutment bead due to its filling, which is essentially Can be produced at a lower cost than the abutment beads present in the known ventilation masks and also the mask always ready for use. This should include the manufacturing costs for the mask, also to the extent that they are due to the attachment of the headgear are caused to be reduced overall

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they can be thrown away after a single use can, which can be desirable in many cases to avoid the risk of infection. It's another job of the Invention, a respiratory mask, which the aforementioned requirements met, to train so that they., similar to the known masks with inflatable bead, space-saving can be accommodated, for example in the well-known Ers € e help Packagings.

The invention proposes to solve the first-mentioned sub-problem before that the contact bead of the mask as a plastic blow molded part is formed with an interior that is filled with air and tightly sealed to the outside and permanently closed. Such a Bead can be manufactured very cheaply using the blow technique known per se for the production of hollow plastic bodies especially if a molding tool is used here with which several Have beads made. Such a mold is described, for example, in Swiss patent specification 442 70. For the production of the mask bead according to the invention, the plastics commonly used for processing in the blow molding process, For example, polyethylene, polyvinyl chloride can be used.

The invention is a reduction in manufacturing costs for the mask reaches such an extent that the manufacture of ventilation masks for single use are economical

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seems justifiable. Such masks exist in hospitals a need especially for anesthetic purposes. But there is also the possibility of such (anesthetic) Masks only replace the abutment bead, which is a replaceable attachment of this to the generally hard Plastic makes the existing middle part necessary. For this purpose, on the middle part and the bead formations, for example in the form of a groove, by means of which the two parts are releasably connected to one another by clamping can be. After using such a mask, the contact bead is thrown away and the middle part cleaned or disinfected.

In the formation of the mask according to the invention in such Way that it can be accommodated in a space-saving manner, it should be noted that on the permanently air-filled contact bead in the packaging (the internal pressure of the bead is slightly greater than the external pressure) normally no such pressure of can be exercised outside that the bead bursts or air gradually through the in some, if only slightly Perimeter permeable film wall is pressed out of the bead. The invention therefore provides that the central part of the Mask devices are formed or molded, which the air-filled abutment bead against when the mask is collapsed protect against excessive compression. Independent protection is claimed for this, for example independently whether the bead is filled with air or another medium such as foam.

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The devices mentioned can be used in the case of a collapsible mask (cf. * e.g. French patent 7 031 94-3) from the after the splitting facing sides of the wall parts on the mask middle part * consist of molded projections which the Limit the distance between the wall parts. As a result, the aforementioned wall parts are removed when the mask is folded up prevented from direct mutual contact, which would put the contact bulge under excessive pressure. the Projections also serve as spacers for the wall parts. The projections are preferably in the form of webs lying opposite and abutting one another after splitting educated.

For folding the middle part of the mask are on this Weakening zones are formed along the split line or split lines as described in detail in French patent 7 031 94-3. The wall parts of the The middle part of the mask can be bent away from the central blow-in tube of the mask. , -.

But there is also the possibility of the central blow-in tube of the mask on the middle part of the mask being able to be pressed in in this way to arrange that, after being pressed in, it has its free end and its end connected to the middle part of the mask on both sides something protrudes beyond the investment bead. By pressing in the injection tube, the middle part of the mask, the bulges out quite a bit when the mask is in operation

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and therefore also takes up a relatively large amount of space, a space-saving flat shape, the central part being enclosed within the air-filled contact bead Space comes to rest. When compressed, the mask can therefore be easily put into first aid packaging accommodate. Since, in the compressed state of the mask, the injection tube with its two ends and possibly also, with the one immediately following at one end Wall part of the middle part of the mask protrudes beyond the abutment bead, it is ensured that the bead in a Pressure on the packaging from above or below cannot be subjected to excessive pressure. The pressure is caused by the above-mentioned protruding parts caught and from Investment bulge kept away. For the indentation of the middle part of the mask or the injection tube are attached to the middle part of the mask around the injection tube by thinning the material thickness Leather weakening zones formed on the middle part of the mask.

In order to achieve a very simple and therefore cheap attachment of the straps or lacing of the headgear to the mask come, are provided on this clamping parts for pulling through and continuously setting the holding means. Here you can the clamping parts each have two walls arranged at a distance from one another, between which the bands or cords can be pulled through and clamped due to the inherent elasticity are. . .

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Exemplary embodiments of the invention are shown in the drawing. Show it:

FIG. 1 shows a view of a mask according to the invention in operating condition;

FIG. 2 shows the mask in the collapsed or pressed-in state;

FIG. 3 shows a section along the line IH-III of FIG. 1; Figure 4 is a view of another embodiment of the mask;

FIG. 5 shows, in a partially sectioned illustration, the mask shown in FIG. M in the folded-up state;

Figures a section through different mask designs, 6 to 8 in which the contact bead is arranged interchangeably on the middle part of the mask and

Figure 9 is a view of a mask on the clamping parts for the pulling through and stepless fixing of the cords of the headgear are provided.

In the exemplary embodiments shown, the contact bead 1 is a blow molded plastic part with a bulge filled with air and designed to be tight and permanently closed to the outside. The bead 1 can be denoted by 3 as a whole The middle part of the mask must be firmly connected, e.g. glued. But there is also the possibility of the bead on the middle part of the mask to be releasably or interchangeably fastened, as shown in FIGS. 6 to 8. For this purpose can

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in the bead 1 a! Tut 4- be molded into which the with a molded bead 5 provided edge of the mask middle part can be clamped or snapped in when the parts 1 and 3 are printed against each other (Figure 6). In the exemplary embodiment according to FIG. 7, a bead 1 is provided for the same purpose Shaped lip 10 which can be snapped into a groove 11 formed on the edge of the central part 3. To accommodate the bead 1 through the edge of the mask middle part 3, an indentation 12 is formed on the edge, into which the bead 1 is clamped can be pushed in, the interaction between the rib 10 and the groove 11 providing additional security for the holder offers. In the exemplary embodiment according to FIG. 8, a groove 13 is formed on the bead 1 by means of a projection 15, in which the edge of the central part 3 can be clamped.

In the operating state, the middle part of the mask 3 is proportionate strongly arched, which together with the injection pipe 6, which from The middle part of the mask is directed outwards, which takes up a relatively large amount of space for accommodation the mask leads.

In order to significantly reduce the space requirement when the mask is not in operation, in the exemplary embodiment according to FIGS FIGS. 1 to 3 provide that the injection pipe 6 is pressed into the mask while the middle part of the mask is turned inside leaves (see Figure 2). This is made possible by

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that the strength of the at. the Eihblasrohr 6 immediately adjacent Wall part 7 of the middle part of the mask is essential, is less than that of the other wall parts «Through the. Weakening of the wall thickness in the area of the wall part 7, a bending zone is created here, which the indentation of the injection tube 6 and the inversion of the middle part of the mask 3 despite its relatively hard construction enables. -

As can be seen from FIG. 2, the injection tube 6 is at the top with both ends after it has been pressed into the mask and at the bottom over the contact bead 1, whereby this against too strong compression when pressure is applied to the upper and / or The underside of the compressed mask is protected. On one side (at the bottom in FIG. 2) also forms the protruding wall part 7 an abutment for a pressure acting on the mask. That for the support effect of the two At the ends of the injection pipe 6, the correct indentation dimension can be achieved by dimensioning the extent of the weakening zone 7.

Instead of being compressible, the mask shown in FIGS. 4 and 5 provides that it can be folded up, with the wall parts 3 ¹ , 3 ″ of the middle part of the mask lying opposite one another (cf. FIG. 5) of the wall parts 3 '»3" are two visual weakening or bending zones

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according to the proposal according to the French patent specification 7 031 943 provided. This again through a reduction the wall thickness of the mask middle part 3 created Zones run over the central area "of the middle part of the mask along lines that extend over the largest Extension of the middle part of the mask at a distance corresponding to the diameter of the injection tube 6. This is not shown in detail in the drawing. On the inside of the wall parts 3 '> 3 ″ of the middle part of the mask, webs 8 are formed opposite one another, which when the mask is folded come to the plant. This limits the possible distance between the wall parts 3 '»3" and the contact bead 1 protected from excessive compression (see Figure 5)

In the case of the mask shown in FIG. 9, the middle part 3 has its outer side, that is, the side facing away from the face T-shaped clamping parts 9 »preferably made of plastic, provided, For example, molded on the middle part 3 »(cf. the enlargement in detail). Between the tabs 9 S 9 " and the wall of the mask middle part 3, the cords 14 of the Head mount can be pulled through and clamped in every position, so that the cords can be continuously adjusted 14 - and thus a very individual adjustment of the headgear to the respective individual circumstances possible. The misshapen Training proves to be expedient because it allows the ends of the cords 14 to be bent and fixed that they do not interfere in front of the mask center part. Of course, the clamps can also have a different design e.g. be U-shaped. In any case comes

Flaps which have the clamping effect due to the inherent elasticity of the / clamping parts

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Claims (11)

231-89U Patent (protection) claims mV) ventilation mask with a flexible, elastic mask due to its filling Contact bead, characterized in that the contact bead (1) as a plastic blow molding part an interior space (2) that is bulging with air and tightly sealed to the outside and permanently closed off is. 2. Ventilation mask according to claim 1, characterized in that the bead on the mask middle part (3) is exchangeable is attached. 3. Ventilation mask after one or both of the preceding Claims, characterized in that the mask can be collapsed to reduce its space requirement and in the collapsed state of the bead (1) against excessively strong devices formed on the middle part of the mask (3) Compression is protected. ■ - 4. Ventilation mask according to claim 3, characterized in that the central injection pipe (6) of the mask under 408-843 / 0605 put the mask middle part (3) in such a way into the The mask can be pushed in that, after pushing in, it has its free end and its middle part with the mask (3) connected end still protrudes on both sides over the contact bead (1). 5. ventilation mask according to claim 4, characterized ge characterizing ', that for the Sindrückbarkeit of the injection pipe (6) around this around in the wall of the mask middle part (3) weakening zones are formed. 6. Ventilation mask according to claim 3 »characterized in that the mask middle part (3) can be folded up and on the sides of the wall parts (3 ¹ , 3") facing each other after splitting. i 3 ¹¹ ) limit. 7. Ventilation mask according to claim 6, characterized in that the projections are opposite to each other than after folding and mutually adjacent webs (8) are formed. 8. Ventilation mask according to claim 6, characterized in that the middle part of the mask (3) has wall parts (3 ¹ »3 ¹¹ ) which can be bent away from the central injection pipe (6). 409843/0605 23189U 9. Ventilation mask, in particular according to one or more of the preceding claims, characterized in that the mask Xlenmteile (9) for pulling through
and continuous fixing of the straps or cords (14-) of the head mount are provided. 10. Ventilation mask according to claim 9 »characterized in that that the clamping parts are formed as projections of the middle part of the mask (3). 11. Ventilation mask according to claim 10, characterized in that the projections are T-shaped. 409843/0605