DE1282469B - Gas-tight container under vacuum for breathing apparatus and method for closing such a container - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. CL:

A62b

German KL: 61 a - 29/35

Number: 1282469

File number: P 12 82 469.0-25 (D 50008)

Filing date: April 30, 1966

Open date: November 7, 1968

The invention relates to a gas-tight container for breathing apparatus that is under negative pressure, in particular respiratory protection devices with moisture-sensitive filter material, made of a pot-like material Lower part and a cover that closes it. It is a container for to be kept under vacuum Objects, in particular breathing apparatus, known in which a membrane with one of them Deflection indicating device forms or carries at least part of the container wall. the The membrane can be under the pressure of a spring counteracting the external air pressure, and so on be protected by a solid lid that does not seal the storage container in a gastight manner. The cover can be provided with a bore in which a connected to the membrane, as a display device serving pen is guided.

The formation of the known container is based on the task of designing the container so that a simple monitoring of the gas tightness or gas permeability of the container is possible. These The object is achieved with the device indicating the deflection of the membrane. The well-known container consists in the usual way of a pot-like lower part and a lid, which is also common Way are firmly connected to each other by locking means. After closing the container evacuated, so that the membrane deflected under the influence of the negative pressure in the direction of the interior of the container will. If leaks occur in the container, so that air can penetrate into the container, moves the membrane to the outside and shows the leakage of the container through the pressure-indicating means at. The known container has the disadvantage associated with the previously known containers for breathing apparatus, that special closure means are necessary for a firm connection of the container parts. the Closing means must be mechanically resistant so that the necessary closing pressure is achieved will. The closures, which are therefore relatively complex, have the further disadvantage that their handling is awkward and that they should not be used by "inexperienced people" in emergencies required speed can be opened.

Furthermore, a two-part container is known which is intended for the storage of respiratory protective devices and whose one container part is pressed onto a sealing ring located in a groove in the other container part by means of a pressure lock. The cross section of the sealing ring is smaller than the cross section of the groove and can, for. B. circular, approximately crescent-shaped, elliptical, trapezoidal, parabolic. Vacuum, gas-tight container
for breathing apparatus and procedures for
Closing such a container

Applicant:

Drägerwerk, Heinr. & Bernh. Dräger,

2400 Lübeck, Moislinger Allee 53/55

or be rectangular. Also in this known container closure means are required through which a pressure lock is brought about between the container parts, but the previously described To cause difficulties.

The invention is based on the object of creating a gas-tight container for breathing apparatus

ao fen that has a simpler structure and can be closed more easily and yet securely. The solution consists in that the interior of the container is under such a negative pressure that the container parts, which are separated from each other by a sealing ring, only through at normal external air pressure these are pressed against each other in a gas-tight manner and that a container part with a manually operated device is provided for producing a pressure compensation opening. The container designed according to the invention has the advantage that it is closed by a sufficiently large negative pressure in the interior of the container is. Accordingly, a permanent gas-tight closure is created with simple means, the is simple in construction and enables the fastener to be opened quickly.

The invention further relates to a method for closing such a container, which consists in that the container is introduced into a chamber and this is brought to at least the negative pressure under which the container should finally be, whereupon the interior of the chamber to bring about a pressure equalization the surrounding air.
Further features of the invention are the subject matter of the subclaims, of which claims 7 to 13 have no independent meaning.

Exemplary embodiments are shown schematically in the drawing. It shows
A b b. 1 a gas-tight container, partly in section,

A b b. 2 a device for closing a container according to A b b. 1 on average,

809 630/780

Claims (1)

3 4 A b b. 3 and 4 other embodiments, also- Furthermore, the sealing ring 5 is on its outer case partially in section, side covered by a cover ring 24, the A b b. 5 shows a section in the plane AA of the sealing ring 5 from mechanical damage A b b. 4 and protects. A b b. 6 and 7 two further embodiments, 5 The cover 2 is provided with a ring 25, the partly in cut. made of metal. This protrudes when it is closed The: gas-tight container according to Fig. 1 consists of a container in a corresponding recess 26 of the into a lower part 1 drawn from sheet metal or from a plastic pot-like part. That’s on the ring sprayed pot-like lower part 1 and a removable sealing ring 5 with its inside supported, ble cover 2 made of the same material. The one another io In the embodiment according to A b b. 4 and 5 is facing edges 3 and 4 of the lower part and a tear wire 27 on the cover ring 24 angeord cover are bead-like. Between the net. The tear wire is through the sealing ring 5 after A sealing ring 5 is placed on the edges. Guided inside the container and ends in a cutting piece 28, the breathing apparatus 6 is located in an opening 29 of the ring 25. When leaving The lid 2 of the container has an opening 7 15 take the cover ring 24 is provided by the cutting, the pieces 28 of the sealing ring cut by a rivet-like stopper 8 so that the pot closed is, whose outwardly protruding part with like lower part 1 and cover 2 with certainty of one the top of the container 9 adjacent handle can loosen each other. 10 is provided. The A b b. 4 further shows the arrangement of a After the container parts in the A b b. 1 show the vacuum valve 30 in the cover 2, at the opening of which they have been placed on top of each other,. 31 a vacuum line to be connected to the in A b b. The device shown in FIG. 2 can be used to place the interior of the container under negative pressure. This consists of a base plate 11 to be able to. With this device it is possible that the container is provided with a container nozzle 12 on its upper side even without a device according to FIG. 2 and with bores 13 which close to the connection 25. A vacuum connection piece 14 is required. The container nozzle 12 carries ... device which is connected to the opening 31 and on its end face a rubber ring 15 on which the container is evacuated until the cover 16 can be placed gas-tight. This is the desired negative pressure has been generated. Then provided with an opening 17, which is removed through a valve plate 18 30 pressure line connected to the opening 31 connected to the opening 31 under a rubber seal 19. The vacuum valve 30 is covered. The valve plate is hinged to the double ■ .-, can be levered out as a self-closing check valve 20, which can be pivoted about the axis 21. mounted on the cover 16 and by the tension spring A b b. 6 shows a lid 2 in one place 22 is held in the closed position. is provided with a cavity 32. The wall thickness After the introduction of the respirator ₃₅ of the lid 33 with- in the range of the cavity is the same along with the container, the lid 16 is put on. . ■ like the wall thickness of the rest of the lid. In the cavity 32 there is a cutting tool 34, dimensioned so that the volume of the front end 35 formed by it is beveled and that of the chamber is only slightly larger than that of the gas-tight chamber at its other end a pressure plate 36 container for the breathing apparatus. Now _{40 is} consolidated. This forms one abutment of a spring 37 via the connecting piece 14 in the chamber, the other abutment of which the bottom generates the negative pressure which forms at least that in the gas-tight cavity 32. The pressure plate 36 is a th container corresponding to the desired negative pressure. Da- flange ring 38, which is subsequently welded in at the gas-tight container itself is evacuated. After can be. The cutting tool 34 is provided with bores 39 _{in the circumference of the chamber 45} when it reaches the desired negative pressure. The wall of the mer 16 is the valve disk 18 with the double lever. Cavity 32 is suddenly opened with the 20 for easier cutting, so that in the chamber cutting tool 34 with a recess 40 the atmospheric pressure is suddenly set. See it. the pot-like lower part 1 and the lid 2 To open the container, it is sufficient to open the cutting the gas-tight container pressed against one another, aeration ₅₀ tool by hand over the printing plate 36 hinvor a pressure balance the interior of the _gas-tight; to push in. The cutting tool cuts a container is possible. The container parts are opened in the wall of the cavity, so that now the gas pressure is pressed against each other so firmly that air can flow into the interior of the container, a perfect and permanent gas-tight connection The end is made. ₅₅ differs from the one according to A b b. 6 only because the To open the 'container it is sufficient to pull the plug 8. Bottom part 41 of the cavity by encircling Kerbunmit pull out the handle 10. gene is provided with a predetermined breaking point 42. At the As soon as the pressure plate 36 is pushed into the gas-tight container, the wall cracks Pressure prevails, the cover 2 can without force »this point. effort to be removed from the lower part 1. 60 The ring 25 can also consist of plastic The container shown in Fig. 3 distinguishes between · and, for example, with the lid or the bottom differs from the one according to Fig. 1 once in that they are injected together. The same also applies to the opening 7 in the lid 2 of the container in a view of the cover ring 24 according to A b b. 3. recess 23 is arranged, which is so large that that also the outwardly protruding parts of the stop: fens 8 and the handle 10 are included, ..; so that these parts do not fall over the top of the container 9 ■ 1. Gas-tight benach under negative pressure protrude outside. - ".,". holder for breathing apparatus, especially breathing protective devices with moisture-sensitive filter material, from a pot-like lower part and a lid closing it, characterized in that that the interior of the container is under such a negative pressure that the container parts, which are separated by a sealing ring are separated, at normal external air pressure by this alone pressed against each other in a gas-tight manner are and that a container part with a manually operated device for manufacturing a pressure equalization opening is provided. 2. Container according to claim 1, characterized in that the device to be opened Container part of a predetermined breaking point (42), notch or the like. Is formed. * 5 3. Container according to claim 1 or 2, characterized in that a holder on the container is arranged for a pressable cutting tool (34) producing the opening. 4. Container according to claim 3, characterized in that the cutting tool used for opening (34) in the ready position under the pressure directed away from the container wall a spring (37). 5. Container according to claim 4, characterized as shows that the spring (37) between the container wall and a pressure surface on the dem Container facing away from the end of the cutting tool (34) is arranged. 6. Container according to one of claims 3 to 5, characterized in that the container wall is drawn in in the region of the cutting tool (34) in such a way that the tool end and its Bracket at the level of the adjoining top of the container. 7. Container according to one of claims 1 to 6, characterized in that the two-sided Support surfaces for the sealing ring (5) forming edges (3 and 4) of the lower part and the cover are formed bead-like. 8. Container according to one of claims 1 to 7, characterized in that the sealing ring (5) is held on the inside of the container by a known ring (25) which is attached to the a container part is attached and when the container is closed the inside of the other container part is present. 9. Container according to one of claims 1 to 8, characterized in that the sealing ring (5) is covered on its outside by a cover ring (24). 10. Container according to claim 9, characterized in that that the cover ring (24) on one side with a sealing ring (5) penetrating Rip wire (27) is provided. 11. Container according to one of claims 1 or 7 to 10, characterized in that the a container part is provided with an opening (7) closed by a stopper (8) and the plug (8) has an outwardly directed handle (10). 12. Container according to claim 11, characterized in that the container wall in the area of the stopper (8) and the handle (10) is pulled in so far that the stopper (8) and its handle (10) does not protrude beyond the outline of the container. 13. Container according to claim 11 or 12, characterized in that the handle (10) from a tab attached to the side of the plug (8). 14. A method for closing a container according to any one of claims 1 to 13, characterized characterized in that the container is placed in a chamber and this at least under the Negative pressure is brought under which the container should finally stand, whereupon the interior the chamber is connected to the surrounding air to bring about a pressure equalization. Considered publications:
German Patent Nos. 909 299, 1 039 367, 901;
German utility model No. 1 905 358. For this purpose 2 sheets of drawings 809 630/780 10.58 © Bundesdruckerei Berlin