RU2297259C2 - Respirator - Google Patents

Abstract

FIELD: individual respiratory organs protective devices.

SUBSTANCE: respirator comprises filtering half-mask made as a circle with bent edges, spacing means, elastic cord, fixing plate to secure the respirator on user's nose bridge and bands. The circle edges form seal means. Respirator additionally has multilayered filter made of nonwoven fabric, located on outer half-mask surface and thermally connected thereto. Perforation lines and slots are formed along edges of each additional filter. Additional filter layers are arranged so that the slots are mutually shifted.

EFFECT: increased time of respirator usage.

3 dwg

Description

The invention relates to personal protective equipment for respiratory organs from harmful substances.

Famous respirator [see I.V. Petryanov, V. S. Koscheev, P. I. Basmanov and others. "Petal" (Light respirators) - M .: Nauka, 1984, p. the edges and form a shutter, in the middle of which there is a strangulator (a plate for fixing the respirator on the bridge of the nose and a rubber cord). The filtering half mask is made of filter material. The respirator has a spacer in the form of a figure with rays that converge to the center (snowflake). The spacer acts as a lightweight frame that prevents the filter mask from sticking to the face.

This respirator was chosen as a prototype.

Common to the prototype and the claimed invention are:

- filter half mask with shutter;

- strut;

- rubber cord;

- respirator mounting element;

- a plate for fixing the respirator on the bridge of the nose.

The known respirator has the following disadvantage - it prematurely loses its protective properties due to dust, which clogs its surface.

The basis of the invention is the task of creating a respirator in which by using new structural elements it would be possible to extend the life of the respirator.

The problem is solved in a respirator containing a filtering half mask made in the form of a circle, the edges of which are bent and form an obturator, a spacer, an elastic cord, a plate for fixing the respirator on the nose and tape, so that it is additionally equipped with a multilayer filter made of non-woven material, located on the outer surface of the half mask with which it is connected by a thermal seam, perforation and a slot are made along the edges of each additional filter, while the layers of additional filters are located on the outside the upper surface of the half mask so that their slots are offset from each other.

New in the claimed invention is the presence of a multilayer filter, in which it is possible to sequentially tear off the filter layers. The multilayer filter is made of nonwoven material and is located on the outer surface of the half mask, with which it is connected by a thermal seam, while perforation is performed along the edges of each filter.

The separation point of each filter layer is made in the form of a slot. The location of the slots in each filter layer is offset from each other. This makes it possible, upon separation of the filter layer, not to touch other layers.

When dusting the outer layer of the respirator, it becomes possible to extend the period of use of the respirator by 3 times.

The inventive respirator is shown in the drawings:

figure 1 - General view of the respirator, section aa;

figure 2 is a sectional view of a respirator.

The respirator (figure 1) contains a filter half mask 1, made in the form of a circle, the edges of which are bent and form a seal 2, an elastic cord 3, a plate for fixing the respirator on the nose 4, tape 5, spacer 6, a multilayer filter 7. The multilayer filter consists of three filters (I, II, III). It is connected to a half mask thermal seam located at a distance of 15-20 mm from the outer edge.

The separation point of each of the filters of the multilayer filter is offset from the previous layer.

Thus, when using a respirator (see figure 2) is carried out sequentially separation of the layers of the multilayer filter. The perforation of separation of filters (I, II, III) is depicted in section AA.

A respirator is used in this way.

When tightening the elastic cord 3, the filter half mask 1 takes the form of a hemisphere. The plate for fixing the respirator on the nose 4 provides a tight fixation of the obturator 2 in the nose. The fixation of the respirator on the head is ensured thanks to the bands 5.

In the process of breathing, the aerodispersed particles are filtered, and the air released from the aerodispersed particles enters the respiratory system. When you exhale, air passes through the filter half mask. When the outer layer of the filter is contaminated, it is torn off, and the respirator is continued to be used until the next filter layer of the half mask becomes dirty.

Claims (1)

A respirator containing a filtering half mask made in the form of a circle, the edges of which are bent and form a seal, a spacer, an elastic cord, a plate for fixing the respirator on the nose and tapes, characterized in that it is additionally equipped with a multilayer filter made of non-woven material located on the outside the surface of the half mask with which it is connected by a thermal seam, perforation and a slot are made along the edges of each layer of the additional filter, while the layers of additional filters are located on the outer surface awns respirator such that their slits are displaced relative to each other.

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