DE2842247C3 - Mouthpiece valve for breathing apparatus - Google Patents

Description

The invention relates to a mouthpiece valve according to the preamble of claim 1.

In the case of mouthpiece valves for underwater devices, it is necessary that the valve be switched in this way can be that on the one hand the connection to the breathing apparatus is established and on the other hand that Breathing apparatus is shut off from the ingress of water if the wearer removes the mouthpiece.

It is known to meet this requirement for switching the mouthpiece valve from one to the other Device carrier to be provided by hand to be actuated closure part, whereby a switchover from the breathing opening the mouthpiece can be made on the device circuit and vice versa (DE-OS 1708109).

In this known embodiment, it is to be regarded as a disadvantage that in the event of accidental falling out of the mouthpiece from the wearer's mouth the mouthpiece valve remains open and prevents penetration

Water cannot be prevented from entering the device through the mouthpiece. To avoid that is a known automatically closing Munclstückventil when removing the mouthpiece, wherein a valve disc under spring pressure via a mouthpiece part resting on the lip of the user is displaceable while another mouthpiece part is received by the mouth of the user {US-PS 4090511). When pushing apart both parts of the mouthpiece the valve disc releases the passage.

The invention is based on the object of creating a mouthpiece valve and of designing it so that the valve disc be; m the two mouthpiece parts are in contact with each other, the passage to the breathing apparatus releases.

This object is achieved according to the invention by what is stated in the characterizing part of claim 1 Measures resolved.

An example of implementation of the invention is shown in the drawing and will be described in more detail below described. It shows

Fig. 1 is a side view of the mouthpiece valve according to the invention in section, specifically in the closed Valve position when the user has removed the mouthpiece, and

FIG. 2 is a sectional side view according to FIG. 1, in the open valve position when the user is wearing the mouthpiece.

As can be seen from Fig. 1, the mouthpiece valve consists essentially of a valve housing 1, a cover 2 closing the valve housing, a tube 3 with a molded valve disc 4 on which an elastic valve plate Aa is arranged, and two mouthpiece parts 5 lying one behind the other and 6.

An oval projection 7 is formed on the valve housing 1 and has an opening 8 designed as an angular hole. The inner valve housing surface 9 facing the opening 8 is designed as a valve seat IO against which, when the valve is closed, the valve disc 4, which is loaded by a spring 11, comes into sealing contact with its valve plate Aa in order to close off an access opening 12 in the valve housing 1 leading to the breathing apparatus, which leads to the breathing apparatus via a breathing hose not shown in the drawing.

The tube 3 has a continuous elongated hole-like shape for the back part 6 of the mouth that is attached to the tube Breathing opening 13 and circumferentially arranged air passage openings 3 '. The tube itself is slidably mounted in the opening 8 of the extension 7 to open and close the mouthpiece valve to be able to. The mouthpiece part 5 is pushed onto the extension 7 of the valve housing 1, while the The mouthpiece part 6 is arranged on the tube 3.

The mouthpiece parts 5 and 6 each consist of a pliable lip piece Flange 5 'and 6', with the flange 5 'two of the concave surface of the lip piece 5 'protruding bite pins S "are arranged during the Flange 6 'on the opposite side of the bite pin 5 " Side has openings 6 ". The bite pins 5" protrude through these openings when the User with the lips of the spring-loaded mouthpiece part 6 in the direction of the mouthpiece part 5 moves and has created the same in a known manner. The two flanges 5 'come and 6 'of the mouthpiece parts between the rear lip

pen and the rows of teeth of the user to lie, piece parts from the mouth of the user relaxes

while the bite pin 5 ″ of the teeth grasps the spring il and against the valve disc 4

will. In this state, the access opening is then pressed, the valve disc 4 with the elastic valve

opening 12 in the valve housing 1 towards the breathing apparatus tilplättchen 4 "against the valve seat 10, so that the

opened (Fig. 2). '' Access opening 12 to the breathing apparatus blocked

When removing or falling out, the mouth closure is (Fig. 1).

1 sheet of drawings

Claims (3)

Patent claims: 1. Mouthpiece valve for breathing apparatus, consisting of the end a) a valve housing with an actuating element mounted displaceably in the valve housing arranged valve disc under spring pressure, b) a stationary at the end of a tubular extension formed on the valve housing fixed flange-like first mouthpiece part, c) one arranged at the end of the actuating element protruding from the valve housing flange-like second mouthpiece part extending along the tubular extension parallel to the first mouth back part is movable characterized in that d) the displaceable actuating element as a second mouthpiece part (6) receiving and the tube mounted in the opening (8) of the tubular extension (7) of the valve housing (3) is formed, and e) when buider mouthpiece parts (5, 6) lie against one another, the valve disc (4) one to the second Mouthpiece part (6) exposes leading passage (13) while in a reverse End position of the passage is closed. 2. mouthpiece part according to claim 1, characterized in that on the Fla; jch (S ') of the first mouthpiece part (5) snap pins (5 ") are arranged, on the flange (6') of the two ': n mouthpiece part (6) with the bit pin (5") corresponding through openings (6 ") are incorporated, through which the bite pins (5 ") protrude freely when the user is wearing the mouthpiece parts (5, 6). 3. mouthpiece part according to claims 1 and 2, characterized in that the tube (3) on Circumference of incorporated air passage openingsci) (3 ').