JPS6054074B2 - Gas mask with protective hood - Google Patents

Abstract

1. Escape filtering apparatus having : a protective hood (1) ; an internal half-mask (4), a face abutting portion of which is provided with a cutaway region (11) ; a respiratory filter (6), which is arranged externally of the hood in a receiving portion (5) which extends through material forming the protective hood (1) ; and a banded structure (8), which can be put on by means of lugs ; characterized in that the cutaway region (11) is bordered by a lip which forms a surface (10) for abutting the face of a wearer, in that the lip edge, which defines the cutaway region (11), is urged towards a wall of the mask and in that the mask wall, the lip and a support are constructed with a substantially triangularly-shaped cross-section and form a supporting section (13) which tapers off into a flap (15) which lies alongside the bridge of the nose.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention comprises a protective hood and an internal half-mask whose face-contacting surface has a nose cutout, an inhalation filter located externally in a housing that penetrates the material of the protective hood, and a ring tightened through the ring. This invention relates to a gas mask with a protective hood and a protective band.

For example, we often hear of people being seriously injured or even burned to death in hotel fires.

People are afraid to run into combustion gas without a gas mask. Evacuation is facilitated by gas masks that are simple, easy to use, and can be worn even by unaccustomed persons. However, the prerequisite is that the gas mask can fit any head size.
Its protective function can be achieved by both eyeglass wearers and people with chins and whiskers. Known protection against air pollution consists of at least one head hood with a filtered respiratory protection mask.

In that case, the respiratory protection mask and the filter are interconnected by a connecting member that passes through the protective hood. The wearer inhales through the filter and exhales through the opening in the face of the respirator and into the hood. in this case,
This exhaled air escapes into the atmosphere through non-tight locations between the head hood and the wearer's body parts. An air curtain is then formed to prevent external unfiltered air from entering the interior of the hood. Nothing is written about the configuration of the face part of the respirator. However, the drawing shows a conventional half-mask. This half-mask seals the wearer's face with a line seal in a known manner. The degree of sealing of this type of half-mask depends on how well it fits the shape and size of each person's face.
This means that masks of various sizes are required, and therefore it is not suitable for use in gas masks that must fit all users in an emergency (West German Utility Model Registration No. 936347). Other known gas masks with transparent foil protective hoods do not exhibit this difficulty. Instead of a respiratory protection mask, a respiratory connection element with a mouthpiece at its end is guided from the filter housing into the interior of the protective hood. The protective hood has a nasal cushion opposite the upper lip area, for which a band is provided which can be wrapped around the outer circumference of the protective hood and tightened at the neck. A nasal cushion seals the nostrils. However, the mouthpiece has the disadvantage that it must be held with the teeth. This is difficult in people with dentures. On top of that,
．． Mouthpieces for children must be made smaller than those for adults (West German Patent Specification No. 2639).
No. 545). The object of the invention is to provide safe breathing conditions for the wearer in an emergency, in which case all head sizes can be accommodated.
To provide a gas mask with a simple protective hood, which is suitable for both men and women, eyeglass wearers, and beard owners.

This problem is solved by the feature of claim 1, i.e. the face-contacting surface is a triangular contact surface of varying cross-sectional area, surrounding the cutout and arranged on the inner surface of the half-mask facing away from the inhalation filter. It is supported by a molded element which ends in a lip-like contact edge which is applied to the bridge of the nose.

Advantageous embodiments are described in the following claims. The advantage of the gas mask according to the present invention is that the half-mask structure allows the face-contacting surface to be widely applied to the face;
A variety of head sizes and face shapes are thereby covered.

This is not possible with the sealing edges of known half-masks, which act as line seals. In that case there is always a gap somewhere, there is no contact surface and therefore it is not airtight. The shape of the molding below the face-contacting surface within the half-mask body provides a contact pressure that ensures a consistent and reliable contact everywhere.

The large contact surface and therefore low specific contact pressure are extremely comfortable for the wearer. The band can be pulled tightly without bothering the wearer. It encourages close contact. The advantages of a triangularly configured contact molding member are that it provides a planar seal around the muzzle region of the mask wearer, similar to the sealing lip, and improves the flexibility of the seal;
Furthermore, the pressure of the sealing surface is transmitted to the other two sides of the contact molding, which eliminates the concerns of the mask wearer, without undesirably changing the shape of the contact molding.

Embodiments of the present invention will be described below with reference to the drawings.

The gas mask consists of a protective hood 1 with an elastic frill 2.

The hood can be constructed from transparent foil or from another material. If it is not transparent, add window 3 to it.
is provided. A half-mask body 4 is placed opposite the wearer's nose and mouth. This half-mask body is the filter 6
The protective hood 1 is closely penetrated together with the housing 5 for the purpose. The protective hood 1 has lateral rings 7 for passing the band 8. The band 8 can be tightened and held on the neck via the tightening strap 9 by quick adjustment known in the art. At this time, the face contact surface 10 comes into close contact with various parts of the face. The shape of the facial part of the half-mask body 4 is shown in FIG. The cutout 11 for the nose and mouth area is relatively small compared to the outer circumference 12 of the half-mask body 4. Facial seal with large face contact surface 10
It is carried out by. A uniform and comfortable crimp pressure everywhere is achieved by the configuration of the facial part below the facial contact surface 10. FIG. 3 shows a triangular contact molding element that continues with varying cross-sectional area along the entire cutout 11. FIG. The molded part can be constructed from a foamed material and then filled, or it can be a hollow body with walls, as shown in dotted lines. FIG. 4 shows another structure in which one side of the triangle is omitted. Sufficient rigidity of the face-contacting surface 10 is achieved by the intermediate walls 14 arranged at right angles and spaced from each other. The section D shown in FIG. 5 shows that the lip-like contact edge 15 ends, which ensures that the contact molding element 13 rests on the bridge of the nose.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing the entire gas mask according to the present invention; FIG. 2 is a schematic diagram showing the shape of a half-mask body as seen in the direction of A;
3 is a sectional view taken along line B-C in FIG. 2, FIG. 4 is a sectional view taken along line B-C in FIG. 2 of another embodiment, and FIG. 5 is a top sectional view taken along line D in FIG. 1...Protective hood, 3...Window, 4.
... Half mask body, 5 ... Filter container, 6 ... Filter, 8 ... Band, 10
...Face contact surface, 11 ...Cutout part, 1
3...Contact molding member, 14...Intermediate wall, 15...Contact edge.

Claims (1)

Claims: 1. A protective hood and an internal half-mask whose face-contacting surface has a nose cutout, an inhalation filter arranged externally in a housing that penetrates the material of the protective hood, and a band that can be tightened through the ring. In the gas mask for disaster prevention, the face contact surface 10 is formed by a triangular contact molding member 13 of varying cross-sectional area, surrounding the cutout 11 and arranged on the inner surface of the half mask 4 facing away from the intake filter 6. The molded member is supported by a lip-like contact edge 15 which is applied to the bridge of the nose.
A gas mask with a protective hood, characterized by: 2. The gas mask according to claim 1, wherein the triangular contact molding member 13 is constructed as a hollow body. 3. The triangular contact molding element 13 has only two side walls, and the rigidity of the face-contacting surface 10 is achieved by intermediate walls 14 arranged at right angles to said surface at a distance from one another. , a gas mask according to claim 1. 4. The half-mask body 4 is manufactured from a foamed elastic material.
A gas mask according to claim 1.