RU2468841C1 - Coupling device for respiratory apparatus - Google Patents

Abstract

FIELD: medicine.

SUBSTANCE: invention refers to components of respiratory apparatuses to be used in emergency situations or irrespirable atmosphere operations. A coupling device for a respiratory apparatus comprises a portion having a cylinder guide and grooves, a second portion with an O-ring and fixation stops having a cylinder guide with an external surface of the first portion additionally having an elastic ring.

EFFECT: given coupling device provides reliable fixation of the coupled portions, and respectively assembly sealing and ensured user protection; such coupling device has no complex pieces, however provides fast and simple attachment-detachment when using the respiratory apparatus.

1 cl, 5 dwg

Description

The invention relates to constituent parts of breathing apparatus intended for use in emergency situations or when working in an atmosphere not suitable for breathing. The connecting devices should provide quick and easy articulation of the nodes of the breathing apparatus without using a tool in preparing the apparatus for operation, the tightness of the connection during operation, as well as releasability during disassembly. At the same time, the connecting devices must have high reliability of the connection and relative simplicity of design.

Known quick disconnect connecting device (application US No. 2003/0217752 Al, publ. 2003), which can be used to connect the components of the respirator during its operation. In particular, such a connecting device can be used to dock the source of the respiratory mixture of the respirator with its front part. It includes two components, fastened together by means of a bayonet connection. In this case, one of the components has a cylindrical guide surface, as well as two locking stops of different widths and is placed in the mask of the respirator. The second component has a cylindrical guide surface, two grooves, as well as an elastic sealing ring and is located on the source of the respiratory mixture. Docking of parts is carried out by combining guide surfaces, as well as stops and grooves by turning one part relative to another in a certain direction. Sealing of the connection is ensured by an elastic ring.

However, the design of such a connecting device does not provide reliable fixation of the mating parts, and therefore, its necessary tightness and guaranteed user protection. In addition, the connecting device is characterized by the complexity of the design.

The objective of the invention is to improve the operational characteristics of the breathing apparatus by increasing the reliability of the sealing of the connecting device and simplifying its design.

The problem is solved by the invention, according to which the connecting device of the breathing apparatus is a quick disconnect connection, consisting of the following main elements:

- part mounted permanently in the front part (mask) of the breathing apparatus having a guiding cylindrical surface and grooves;

- part mounted permanently on the source of the respiratory mixture, having a guiding cylindrical surface, equipped with an annular seal and stops for fixation;

- fixing elastic ring.

Such a constructive implementation allows for reliable fixation of the mating parts, and accordingly the sealing of the assembly and guaranteed user protection. In such a connecting device there are no complex parts, while ensuring their quick and easy connection-disconnection during operation of the breathing apparatus.

The invention is illustrated by drawings (Fig.1-5).

Figure 1 - Respiratory apparatus with a connecting device

Figure 2 - Connecting device

Figure 3 - Connection device in section

Figure 4 - Part mounted in the front part (mask)

Figure 5 - Part mounted on the source of the respiratory mixture

The breathing apparatus connecting device comprises: part 1 mounted permanently in the front part (mask); part 2 mounted permanently on the source of the respiratory mixture, fixing the elastic ring 3.

Part 1 has, at the end of the connection side of part 2, shaped grooves 8, which serve as guides and fixing elements when connected, a guiding cylindrical surface 11. On the outside of part 1 there is a bead 9. There are ledges 10 between grooves 8 to prevent ring 3 from falling off from part 1 .

Part 2 has a guiding cylindrical surface 12, grooves 5 for installing annular gaskets 4, which provide sealing of the complete assembly. The stops 6 ensure the fixation of part 2 in the grooves 8 of part 1. The nozzles 7 are used for switching with the source of the respiratory mixture of the apparatus, in particular, by means of flexible hoses (tubes) mounted on them.

The elastic ring 3 prevents unauthorized disengagement of the connection (exit stops 6 from the seats of the grooves 8).

Part 1 is permanently mounted in the front part (mask) of the breathing apparatus. Between the edge 9 and the ledges 10 of part 1, an elastic ring 3 is put on. The nozzles 7 of part 2 are fixed in the tubes (hoses) of the inhalation-exhalation of the source of the respiratory mixture of the apparatus. In the grooves 5 of part 2 are installed ring elastic gaskets 4.

The connecting device operates as follows.

To connect the source of the respiratory mixture of the device to the front part (mask), the guiding cylindrical surfaces 11 and 12 are combined, the stops 6 are brought into the grooves 8. Part 2, after pressing the stops 6 to the elastic ring 3, rotates in the grooves 8 until they are fixed. The ring 3 then presses the stops 6 to the seats of the grooves 8 and prevents unauthorized connection failure. Sealing the connection of part 1 and part 2 is due to the installed in the grooves 5 of the annular elastic gaskets 4.

To disconnect the source of the respiratory mixture of the apparatus from the front part (mask), it is necessary to slightly recess part 2 into part 1, deforming the elastic ring 3, and rotate, disengaging the stops 6 from the grooves 8.

This connecting device provides reliable fixation of the mating parts, and accordingly the sealing of the assembly and guaranteed user protection. In such a connecting device there are no complex parts, while ensuring their quick and easy connection-disconnection during operation of the breathing apparatus.

Claims (1)

A connecting device for a breathing apparatus, comprising a part having a guiding cylindrical surface and grooves, a second part provided with an annular seal and stops for fixing, having a guiding cylindrical surface, characterized in that it further comprises an elastic ring placed on the outside of the first part.

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