DE1218883B - Respirator with speech membrane - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. α .:

A62b

German KI .: 61 a - 29/13

Number: 1218 883

File number: D 43459 V / 61 a

Filing date; January 28, 1964

Opening day: June 8, 1966

The invention relates to a respirator with a speech membrane in the connector for the filter or a breathing tube is arranged.

There is a respirator with speech device known, which consists of a in the connector arranged microphone that z. B. in an inwardly open recess of the connector is arranged above the connection piece for a filter or a breathing tube.

There is also a respirator known, the connection piece in its lower part is a connecting pipe to connect the filter. In the middle of the connection piece is a bell arranged through which the sound waves are directed to a membrane that is profiled in cross section and is clamped between two rings. The membrane stands on its outside for a short time Pipe socket in connection with the environment. Above the membrane is the exhalation valve arranged. This connection piece has the disadvantage that the speech diaphragm has a small diameter Has.

Finally, a connector has become known, the lower part of which is a pipe socket for Connecting a corrugated hose carries. Above that is an exhalation valve, the seat of which is off is formed by a rubber ring. The closure body of the exhalation valve, designed as a disk, is essentially formed by a speech diaphragm. In this training too, the membrane surface only be relatively small, because otherwise the exhalation valve will not work properly. The speech transmission is restricted accordingly.

The invention is based on the object of a respirator with a speech diaphragm in the connector to develop in which a good speech transmission is guaranteed and the structural training of the connector is simplified.

The solution to the problem is according to the invention that the membrane is annular Connection piece for · the filter or the breathing tube surrounds.

The invention has the advantage that there is no additional installation point on the connecting piece for the speech diaphragm is to be provided and that the membrane has a relatively large diameter and a accordingly has a large area that ensures good speech transmission.

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

Exemplary embodiments are explained with reference to the drawing. It shows:

Respirator with speech membrane

Applicant:

Drägerwerk, Heinr. & Effort Dräger,

Lübeck, Moislinger Allee 53-55

ίο F i g. 1 a face mask in a spatial representation,

F i g. 2 a connector with a circular speech diaphragm in cross section,
F i g. 3 shows an elliptical mask connection piece in the rear view, which corresponds to the direction of arrow A in FIG. 2, and

F i g. 4 the formation of a protective housing for the membrane.
In the embodiment of FIG. 1 is the

zo mask body 1 equipped with a single, relatively large window 2, which covers most of the occupies the area of the mask body. In front of the mouth of the device wearer, the connector 3 is arranged, which is provided with a connecting thread 4, on which a filter or a breathing tube to a Breathing apparatus can be connected. The cylindrical part 5 of the connector in which the connecting thread 4 is arranged, is in the embodiment of FIG. 2 via a circular ring-shaped Intermediate wall 6 connected to the nozzle 7 of the connector 3, which is to be incorporated into the Mask body 1 is used. The circular partition 6 is provided with openings 8, through the one connection to the space between the cylindrical part 5 and the funnel-shaped enlarged part 9 of the connector 3 is created. Between the front end 10 of the The funnel-shaped widened part 9 and the jacket of the cylindrical part 5, the membrane 11 is arranged. The membrane is held and sealed with a clamping ring 12. The clamping ring has openings 13, so that the sound waves transmitted through the membrane 11 propagate into the environment can.

A transverse web 15 on which the Check valve 16 is attached in a known manner. The device wearer inhales through this.

Exhalation takes place through an exhalation valve 17 which is separately attached to the mask body 1 The exhalation valve can also be arranged elsewhere.

609 578/42

F i g. 3 shows a connection piece 3 with an elliptical connector 19, which corresponds to the connector 7 and in the Mask body 1 is incorporated. The cylindrical part 5 carries the check valve via the crosspiece 15 16 through which the device wearer inhales.

The funnel-shaped widened part 9 is broken off at the top and bottom to save space shown. In this design, there remain between the cylindrical part 5 of the check valve 16 and the neck 19, which is elliptical in cross section, has two relatively large connecting openings

20 for the sound waves that correspond to the openings 8. With this arrangement, the The passage area for the sound waves from the mouth can be enlarged. The membrane is designed in the same way as in Fig. 2.

In Fig. 4, a Schulz housing is shown by that the safe installation of a thin-walled membrane 11 is guaranteed. The membrane can then together with the protective housing also used by inexperienced equipment wearers in the connector or be replaced. The protective housing consists of two rings 21 with an approximately U-shaped cross section and 22. The edge portion of one ring is crimped around the edge portion of the other ring, thereby creating a secure connection is established. The membrane 11 is clamped between the edge parts. The Rings

21 and 22 are provided with openings for the sound waves to pass through. The protective housing forms with the membrane an easily replaceable component, which in place of the membrane 11 in a connection, piece according to fig. 2 can be used and also is held by the clamping ring 12. _

So that the membrane 11 cannot be damaged from the outside, it is advantageous to use the perforations in the protective housing according to FIG. 4 to move with respect to the openings 13 in the clamping ring 12 so that the slots cover each other when the housing is connected.

In order to improve the sound transmission, in the case of the one shown in FIG. 4 protective housing shown the membrane after fastening between the rings are tensioned in that the protective housing is subsequently is deformed in such a way, for example by beads or the like, that a tension of the membrane is reached.

Claims (11)

Patent claims: 1. Respirator with a speech diaphragm in the connector for the filter or a breathing tube is arranged, characterized in that the membrane (11) surrounds the connection piece for the filter or the breathing tube in a ring shape. 2. Respirator according to claim 1, characterized in that the membrane (11) Is formed circular. 3. Respirator according to claim 1 or 2, characterized in that the membrane (11) is contained in an annular protective housing inserted into the connecting piece (3). 4. Respirator according to claim 3, characterized in that the membrane (11) in the protective housing tensioned by a deformation of the same after inserting the membrane (11) is. 5. Respirator. according to one of claims 1 to 4, characterized in that the The membrane (11) or the protective housing with a clamping ring (12) in the connection piece (3) is gas-tight is held. 6. Respirator according to one of claims 3 to 5, characterized in that the Protective housing and / or the clamping ring (12) are provided with preferably slot-shaped openings (13) are. 7. Respiratory protection mask according to claim 6, characterized in that the preferably slot-shaped openings (13) of the protective housing; ses and the clamping ringXl2) are offset from one another. "'_ ■ 8. Respirator '! According to one of claims 1 to 7, characterized in that the Connection piece (3) for receiving the annular membrane (11) of the membrane protective housing funnel-shaped "expanded and on the tapered side; of the funnel with a nozzle (7) for connection to the mask body (1) is provided. ' . * _ 9. breathing mask, 'according to claim 8, characterized characterized in that the funnel-shaped widened part (9) of the connecting piece (3) over with openings (8) 'provided partition walls (6) with the connecting piece for the filter or the breathing tube is connected. 10. Respirator 'according to one of claims 1 or 4 to 7', characterized ^ that the connection piece is provided with a connecting piece (19) for connection to the mask body is, which is elliptical in the rear view and in the longitudinal direction and in the vicinity of the Vertices of the minor axis of the ellipse with the connection piece for the respiratory filter or the breathing tube is tight, connected, and that laterally of the connecting piece connecting openings (20) to the space covered by the membrane (11) are arranged. 11. Respirator according to one of claims 3 to 10, characterized in that the membrane (11). receiving protective housing made of two in cross-section approximately U-shaped, with their open sides directed towards one another rings (21 and 22) is formed, which on "Edge preferably by flanging the edge part of one ring (22) around the edge part of the other ring (21) are connected to each other and between the edge parts of the membrane (11) is clamped. , Considered publications:
German utility model No. 1 860477;
French patent T> ir. 740 359;
British Patent No. 940,030. 1 sheet of drawings 609 578/42 5.66 © Bundesdruckerei Berlin