DE1238779B - Respirator with an inner mask that covers the mouth and nose - Google Patents

Description

GERMAN PATENT OFFICE

EDITORIAL

German class: 61 a -29/10

Number: 1238779
File number: M50797 V / 61 a

1 23 8 779 Filing date: November 7, 1961

Opened on: April 13, 1967

The invention relates to a respirator with an inner mask covering the mouth and nose and from the air inlet opening to the mask windows leading air lines, in which the inner mask in the Area of the exhalation valve and, if a speaking device is arranged on the mask body, also at the level of the holder of the speech device is firmly connected to the mask body and the same as the inner mask is made of an elastically flexible material.

In a known breathing mask of this type lead from the air inlet opening to the mask windows Air lines that are arranged on the inside of the mask body. The ones on the masked windows Inhaled air passed by is said to fog up the mask window, which is also caused by sweating caused, or if the mask window is already fogged up again the downcast Remove moisture. The air lines are made of hoses and semicircular in cross-section the final part of the mask body. This training is relatively cumbersome and also complicates the manufacture of the respirator.

There are also respiratory masks are known which are provided with inwardly directed walls or beads that lie against the face of the person wearing the mask when the mask is put on. This will be Air ducts are formed between the mask body and face, through which the inhaled air to the mask windows is directed.

The invention is based on the object of providing a respiratory protection mask of the type mentioned at the outset to develop further that no additional parts are required to form the air ducts.

This object is achieved according to the invention in that the mask body and the inner mask with forming the air ducts, arched in opposite directions and opposite one another Bulges are provided and lie against one another on both sides next to the bulges.

In a mask according to the invention, the mask body and the inner mask themselves are used to form the air lines are used, so that special pieces of tubing etc. are not required.

Further features of the invention are the subject of the subclaims.

The invention is explained using two exemplary embodiments shown in the drawing. It shows

F i g. 1 shows a side view of a respirator without speaking device,

Respirator with a mouth and nose
covering inner mask

Applicant:

Ministero Deila Difesa - Esercito,
Direzione Generale Artiglieria ₃ Rome;
Pirelli Societä per Aziona, Milan (Italy)

Representative:

Dipl.-Ing. W. Meissner and Dipl.-Ing. H. Tischer, patent attorneys, Munich 2, Tal 71

Named as inventor:
Alcibiade Borgia,
Vincenzo Brazzoduro, Rome

Claimed priority:

Italy of November 7, 1960 (19 059)

F ί g. 2 a side view of the inner mask,

F i g. 3 shows a section through the mask along its plane of symmetry,

F i g. 4 shows a section through the mask in the plane AB of FIG. 3,

F i g. 5 shows a side view of a respiratory protection mask provided with a speech device;

6 shows a side view of the associated inner mask,

F i g. 7 shows a section through the mask according to FIG. 5 along their plane of symmetry and

F i g. 8 shows a section through this mask in plane C-D of FIG. 7th

As shown in FIG. 1, the protective mask 1 consists of the mask body 2 and an approximately frustoconical inner mask 3. This covers the mouth and nose of the mask wearer. At chin height of the mask body 2 , a connecting piece 4 is arranged in which the filter is attached. Furthermore, the mask body is provided at mouth level with a circular opening 5 for holding the exhalation valve and above it with two openings 6 for the window panes and with the sealing edge 7 . The inner mask is connected to the mask body by means of buttons 9 .

To form the air ducts, the mask body 2 is provided on both sides with an outwardly curved bulge 10 , which extends from the inside

709 549/49

Claims (1)

Ren end of the nozzle 4 extend to the lower part of the window panes. At the in F i g. 2, a round extension 12 is arranged for holding the exhalation valve, not shown, which is inserted through the opening 5 of the mask body. The upper part of the inner mask is provided with an opening 13 for the inhaled air, in which an inlet valve can be arranged. This valve can also be located directly behind the filter. The inner mask edge is designed so that the part that is supposed to nestle against the wearer's face, i.e. the approximately horizontal part 11, corresponds exactly to the contours of the face, while the remaining edge 14, which is clamped between the sealing edge 7 and the mask body, is a has a correspondingly curved profile. The inner mask is provided with an inwardly curved bulge 15 which runs parallel to the edge 14 and corresponds approximately in length to its length. From the opposing bulges 10 and 15 of the mask body of the inner mask, air lines 18 and 18 'are formed - starting in the area 4' of the transition from the connector 4 to the mask body - which are connected to one another through the space 19. The inner mask has two projections 16 and 16 'in order to direct the air flowing out of the air lines 18 and 18' towards the two window panes before the air passes through the opening 13 under the inner mask. Two recesses 17 made symmetrically in the inner mask receive the heads 9, which connect the mask body and inner mask to one another at the transition from the upper part 11 to the edge 14. At this point, the connection between the mask body and the inner mask can be released at any time, especially if this is necessary to clean the air ducts. However, the mask body and inner mask are firmly connected via the exhalation valve, that is to say at the point where the extension 12 is inserted into the openings 5. The air lines 18 and 18 'are easily accessible for cleaning or checking. For this purpose, it is sufficient to lift the edge 14 of the inner mask from the bent-back sealing edge 7 of the mask body and, if necessary, to loosen the button connection between the mask body and the inner mask. Then this is only connected to the mask body via the exhalation valve. F i g. 5 to 8 show another embodiment, for masks provided with a speaking device. The respirator 20 consists of the mask body 21 and the inner mask 22, which has an approximately frustoconical shape and covers the nose and mouth of the wearer. In the lower part of the mask body 21 there is a connecting piece 23 for receiving the filter and an opening 24 for receiving the speaking device, not shown, at mouth level. To the side of the connector 24 there is another opening 25 for the exhalation valve, not shown. The mask body 21 has two openings 26 for the window panes, a bent-back sealing edge 27 and two holes, not shown, for the buttons 29 with which the inner mask is attached to the mask body. It is provided on both sides with outwardly curved bulges which extend from the enlarged inner end 23 'of the connecting piece 23 to the window panes. The in F i g. The inner mask shown in FIG. 6 has a round, continuous extension 31 at the front for receiving the speech device. This approach is in turn introduced into the opening 24 of the mask body. In the upper part, the inner mask is provided with a round opening 32 in which an inlet valve can optionally be arranged. In this case, too, the valve can be located directly behind the filter. A short extension 33 for receiving the exhalation valve is arranged to the side of the extension 31 and is inserted into the opening 25 of the mask body during assembly. The outline of the inner mask is the same as that of the first embodiment. The upper, approximately horizontal part 35 corresponds to the contours of the nose and cheekbones, the edge 36 to the edge 14 of the first embodiment. The inner mask has an inwardly curved bulge 34 which approximately follows the edge 36 in length and extent. This bulge lies opposite the bulges 30 and the enlarged inner end 23 ′ of the connecting piece 23. When the two mask parts are assembled, two air lines 37 and 37 ′ are formed in this way, which are connected to one another at the bottom through the cavity 38. At the level of the lower part of the window panes, two projections 39 and 39 'are arranged on the inner mask in order to direct the incoming air towards these panes. After the same has been coated, the air then flows through the opening 32 under the inner mask. The two recesses 40 in the inner mask, which are arranged where the part 35 and the edge 36 meet, serve to accommodate the buttons 29 which connect the mask body 21 to the inner mask 22. The air sucked in through the filter enters the cavity 38 through the nozzle 23, flows through the two air ducts 37 and 37 'and reaches the lower part of the window panes, against which it is deflected by the projections 39 and 39', and finally flows through the opening 32 under the inner mask. When exhaling, the exhaled air passes through the exhalation valve, which is arranged on the extension 33, directly into the open. Patent claims: 1. Respiratory protection mask with an inner mask covering the mouth and nose and air lines leading from the air inlet opening to the mask windows, in which the inner mask is firmly connected to the mask body in the area of the exhalation valve and, if a speech device is arranged on the mask body, also at the level of the holder of the speech device and which, like the inner mask, consists of an elastically flexible material, characterized in that the mask body (2 or 21) and the inner mask (3 or 22) form the air ducts (18 and 18 ' or 37 and 37') , bulges curved in opposite directions and opposite one another (10 and 15 or 30 and