FR2565830A3 - RESPIRATORY CONNECTOR FOR RESPIRATORY PROTECTION APPARATUS - Google Patents

Abstract

THIS RESPIRATORY CONNECTION IS INTENDED FOR A RESPIRATORY PROTECTIVE APPARATUS INCLUDING A LUNG AUTOMATE 1 EQUIPPED WITH AN OSCILLATING LEVER 6 AND A ADDITIONAL ADJUSTABLE CONSTANT DOSAGE OF RESPIRATORY GAS OPENED THROUGH A 7 OSCILLAN VALVE 7. ACCORDING TO THE INVENTION ON THE HOUSING 2 OF THE LUNG AUTOMATE 1, IS FITTED IN A NUT 9, AN ADJUSTING SCREW 10 FITTED WITH A STOP 13 PLACED IN FRONT OF THE OSCILLATING LEVER 6 OF THE OSCILLATING VALVE 7 THIS SCREW BEFORE THIS LEVER ACCORDING TO ITS ADJUSTMENT POSITION TO OPEN THE OSCILLATING VALVE 7 TO ITS CONSTANT DOSING POSITION. THIS FITTING INCLUDES 11 SPRING PINS LOCATED IN THE ADJUSTING SCREW 10 AND WHICH LOCK IN THE 12 HOLE DRILLINGS IN THE PERIPHERY OF THE NUT 9.

Description

i

RESPIRATORY FITTING FOR APPARATUS

RESPIRATORY PROTECTION

  The invention relates to a breathing connector for

  a respirator that includes a respirator

  lung tomato equipped with an oscillating lever that includes an additional constant dosage of the adjustable breathing gas

  through this oscillating lever.

  A respiratory connector of this type for a respiratory protection device is already known by the patent

British 969,280.

  It is already known in the apparatus of protection

  closed circuit, to guarantee, by means of a controlled dosage, a constant oxygen inflow, and in the case of an increase in demand, to supply in addition the quantity required by means of a lung machine. ordered accordingly. However, it can easily occur frequently too much

  or, on the contrary, an overly frequent solicitation of

  mate to lung, which leads to a more physical solicitation

  strong of the user of the device.

  A respiratory connector of this type for a respiratory protection device is already known by the patent

aforementioned British.

  It is equipped with an automatic pulmo-

  demand and an additional constant supply of breathing gas. In the automatic pulmocontrolling valve responding to the demand, a diaphragm acts on an oscillating lever and controls the arrival of the respiratory gas according to the respiratory activity

  of the user of the device. Respiratory gas supply

  constant simultaneous reaction is obtained by means of a

  which can be adjusted externally on a steering wheel by means of a screw and which raises the diaphragm from its resting position or, at the moment of the return of the diaphragm to this position, supports the latter before it 'reach this position. In this way, either the oscillating valve

  is open, or its total closure is prevented.

  In this way, a constant flow of gas is obtained

  breathing to the user of the device.

  Here, the dosage is assured in all cases by the position of the membrane. However, since during use the membrane is subjected to inertial forces such as shaking, or to those fluctuations in the pressure resulting from breathing,

  this membrane does not form a definite stop. Fluctuations

  transmitted to the oscillating lever of the oscillating valve which is pressed against the diaphragm in all

  cases and lead to irregularities of the desired dosage.

  The object of the invention is to improve a

  breathing apparatus for a respirator

  of the above kind so as to obtain a

  defined setting of constant dosing, which remains maintained even during strong shaking and so that the safety of the setting avoids frequent actuation, resulting in a resulting physical stress for the user of

- the device.

  According to the invention, this problem is solved in that, on the housing of the lung machine, is arranged in a nut, a set screw provided with a stop placed facing the oscillating lever of the oscillating valve, this

  screw deviating this lever according to its position of adjustment

  to thereby open the oscillating valve in its constant dosing position and that spring pins, which are accommodated in the adjusting screw, lock in

  holes in the periphery of the nut.

  The advantages provided by the invention consist in particular in the fact that with the deviation of the oscillating lever, it is possible to obtain in a simple and direct way a defined opening of the oscillating valve which determines the constant dosage. The low mass of the lever

  Oscillator avoids vibrations in the presence of shaking.

  Pressure fluctuations that result in movements of the membrane do not immediately affect the

  swing lever that is raised by the dosing device

  constant age. They do not act on the os-

  cillante. The spring pins that are housed in the

  Adjustment screws guarantee the stability of the dosing value.

  constant age. They lock in the holes in the periphery of the nut casing and maintain the

  adjusting screw in the chosen position.

  An exemplary embodiment is described below with reference to the single figure of the attached drawing which is a view

  schematic of the connection according to the invention.

  Breathing fitting for breathing apparatus

  re comprises a lung machine (1) and a device (3)

  dosing constant attached to the cabinet of this automaton.

  The breathing fitting is connected, by means of a tubing (4) carried by its casing, to a place

  the breathing circuit of the protective device

  breathing. The lung machine (1) of known type comprises a membrane (5) driven by the pressure prevailing in the breathing circuit and which, by abutting against an oscillating lever (6) which carries an oscillating valve (7)

  loaded by a spring, commands an increase in the

  breathing gas supply passing through the coupling (8).

  The constant dosing device (3) comprises

  in a nut (9), an adjusting screw (10) which is operated

  by hand. Spring pins (11) lock, in the angular position of the adjusting screw (10), in bores (12) in the periphery of the nut (9) and thereby fix several possible positions. These

  positions define the axial position of the adjusting screw

  ge (10) and a stop (13) which is provided at the end of

  this screw, facing the oscillating lever (6). The stop (13) exerts

  this pressure on the oscillating lever (6), this pressure varying according to the desired constant dosage and it discards this

  lever of the closed position for the oscillating valve

te (7).

  The oscillating valve (7) opens accordingly so that the respiratory air flow of the constant dosage enters the breathing circuit. By means of the constant metering device (3), it is possible to regulate with sufficient accuracy the flow rate of gas consumed by

  example of oxygen which is recognized as necessary. If all

  sometimes, there is a short temporary excess need, for example, under the effect of deep aspirations, this need is automatically covered by an opening

  larger of the lung automaton (1).

Claims (2)

  1- Respiratory coupling for protective apparatus   respiratory system comprising a lung machine equipped with an oscillating lever and a further adjustable constant dosage of open breathing gas via an oscillating valve (7) actuated by this lever (6), characterized in that, on the housing (2) of the lung machine (1), is arranged in a nut (9), an adjusting screw (10) provided with a stop (13) placed facing the oscillating lever (6) of the oscillating valve (7) This screw deflects this lever according to its setting position to thereby open the oscillating valve (7) in its constant metering position.   2- Respiratory coupling for protective device   respiratory system according to claim 1, characterized in that spring pins (11) which are housed in the adjusting screw (10) lock in holes (12).   formed in the periphery of the nut (9).