EP1077743A1 - Protective breathing equipment with fast positioning - Google Patents

Protective breathing equipment with fast positioning

Info

Publication number
EP1077743A1
EP1077743A1 EP99918026A EP99918026A EP1077743A1 EP 1077743 A1 EP1077743 A1 EP 1077743A1 EP 99918026 A EP99918026 A EP 99918026A EP 99918026 A EP99918026 A EP 99918026A EP 1077743 A1 EP1077743 A1 EP 1077743A1
Authority
EP
European Patent Office
Prior art keywords
strap
rack
mask
equipment according
harness
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP99918026A
Other languages
German (de)
French (fr)
Other versions
EP1077743B1 (en
Inventor
Patrice Martinez
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Safran Aerosystems SAS
Original Assignee
Intertechnique SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Intertechnique SA filed Critical Intertechnique SA
Publication of EP1077743A1 publication Critical patent/EP1077743A1/en
Application granted granted Critical
Publication of EP1077743B1 publication Critical patent/EP1077743B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B18/00—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort
    • A62B18/08—Component parts for gas-masks or gas-helmets, e.g. windows, straps, speech transmitters, signal-devices
    • A62B18/084—Means for fastening gas-masks to heads or helmets

Definitions

  • the invention relates to respiratory protection equipment comprising a respiratory mask, a harness allowing rapid fitting on the face and sometimes protective goggles against smoke, integrated or not in the mask.
  • the present invention aims in particular to provide a respiratory protection equipment ensuring comfort at least equivalent to that of existing equipment during periods of wearing the mask where it is not necessary to apply it enough on the face to resist an overpressure of the respiratory gas and reduce the consumption of breathing gas during these periods.
  • the invention provides in particular an equipment of the kind defined above, the extendable strap of which is connected to the face cover by at least one mechanical member of length adjustable by the user during the wearing of the equipment.
  • This mechanical member can be constituted by a rack fixed to one end of the strap and a pawl carried by the face cover, allowing the relative movement of the strap and the face cover in the tightening direction, the pawl being disarmable to allow moving the rack in the opposite direction.
  • This arrangement can be reversed, the rack then being fixed to the face cover.
  • the pneumatic connection between the face cover, which carries the user-controllable means for supplying the inflatable element, and this inflatable element is provided to allow relative sliding. So that the inflation control causes the rack to come into the maximum tightening position, this result can be achieved by extending the rack by a hollow piston displaceable in a cylinder secured to the face cover.
  • the piston then separates the cylinder into two compar iments, one of which is connected to the supply of the inflatable element and the other to the atmosphere.
  • the protective equipment can be supplemented by an aneroid capsule constituting an altimetric detector and automatically causing the pressurization of the cylinder compartment causing maximum tightening in the event of ambient depressurization.
  • FIG. 1 is a perspective view showing the external appearance of protective equipment for implementing one invention
  • FIG. 2 is a schematic sectional view on a large scale showing the components of one piece of equipment allowing rapid fitting and adjustment of the pressure of the mask on the face.
  • Respiratory rescue equipment shown in Figure 1 shown in the state it is in when the harness is inflated, can be viewed as having a mask 8 and a harness 10.
  • the mask shown has an oronasal face cover attached to a demand regulator 13 and a rigid connection block 12.
  • the connection block is provided with a connection connector with a flexible pipe 14 intended to be connected to a source of pressurized respiratory gas
  • the harness shown has two straps 16 each consisting of an internal tube 17 made of a material allowing the tube to lengthen, contained in an inextensible sheath 19 limiting the elongation of the tube (fig. 2).
  • the regulator will be with or without dilution with air drawn into the cabin, with or without the possibility of overpressure.
  • the regulator is connected to the supply line 14 by the connection block 12.
  • the block carries means for manually controlling the inflation of the straps 16, constituted for example by a tap intended to be actuated by manual pinching of two ears 18 carried by the connection block 12 and one of which is tiltable.
  • the valve is constructed so as to bring into communication an internal volume of the connection block 12 and the straps 16 with the atmosphere when it is free, which then allows the straps to retract and apply the mask against the face.
  • the tap When the tap is actuated, it admits, on the contrary, pressurized gas coming from the supply line 14 into the interior volume, which causes a lengthening of the straps sufficient to allow rapid fitting.
  • At least one of the branches of the harness is connected to the regulator on demand by means of a mechanical length adjusting member.
  • a mechanical length adjusting member In the case illustrated in FIG. 1, two members 20 are provided, each connecting one end of the harness to the regulator or to the connection block.
  • the length of the internal tube 17 in the relaxed state is chosen so that the harness still applies the mask to the face with sufficient pressure when the adjusting member has its minimum length, even on wearers having the head circumference. lower expected. It is generally accepted that this minimum head circumference is 56 cm.
  • the tap making it possible to fully inflate or drain the harness may have the conventional constitution shown in FIG. 2.
  • a passage 22 in which is mounted a plunger 24 which constitutes a double shutter member.
  • One end of the passage is connected to the supply of pressurized respiratory gas.
  • the other end opens to the atmosphere.
  • a first O-ring 26 carried by the plunger 24 rests on a cylindrical portion of the passage 22 and separates the gas supply from an interior volume of the block when the plunger 24 is held by the intake pressure in support. against the ear 18 in the rest position.
  • the displacement of the plunger brings a second O-ring 28 in abutment against a sectional portion of the passage and separates the internal volume from 1 atmosphere.
  • the adjustment member 20 comprises a rack 30 extended by a tip 32 on which the end of the harness is fixed in leaktight manner. Opposite the end piece 32, the rack is extended by an annular piston 34.
  • the portion of the adjustment member capable of sliding relative to the rack consists of an arm of the housing 12 which houses a rack pawl 36 provided with a release button 38.
  • a spring 40 pushes the pawl 36 towards a position where it engages on the rack 30 and prohibits the movement of the latter in a direction corresponding to the elongation of the adjusting member.
  • the arm of the housing is also provided a cylinder which the annular piston 34 separates a compartment 42 connected to the atmosphere by an orifice 44 and a second compartment 46.
  • the internal volume of the tap communicates with the tube 17 by means of aligned holes made in the arm of the housing, in the rack 30 and in the nozzle 32.
  • a path 47 balances the pressure prevailing in the compartment 46 and the pressure in the harness.
  • O-rings carried by the piston 34 sealingly separate the compartments 42 and 46.
  • the mode of use of the equipment is then as follows. Installation: when the user wishes to put the mask which is placed in a storage box, he grabs it by the connection block 12, takes it out of the box and presses the ears 18. The arrival of respiratory gas is then connected to the harness and, via the passage 47, in the compartment 46. The force exerted on the annular piston 34 moves it, to the right in the case of FIG. 2, and brings the adjustment member into its position minimum length. When the user has placed the mask on his face, he releases the ears 18. The mask is applied to the face with a maximum strength.
  • emergency tightening it can be carried out by pushing the flange 50 of the adjustment member (or each adjustment member) fully back. It is also possible to cause this tightening by fully inflating the harness by pressing on the ear 18. The compartment 46 is then put under pressure and "rearms" the rack by bringing it to its rightmost position. As soon as the ear is released, the harness returns to the maximum tightening position.
  • the user When the user wishes to replace the mask in its box, it fully inflates the harness by action on the ear 18.
  • the pressure in the compartment 46 automatically rearms the rack.
  • the user Once the mask has been removed, the user only has to release the ear 18 so that the harness becomes flexible and allows storage in a state such that the tightening will be maximum in the event of replacement of the equipment on the head.
  • two mechanical adjustment members In the case where two mechanical adjustment members are provided, it suffices that one of the two has a pneumatic connection with the straps.
  • FIG 3 shows an alternative embodiment causing maximum tightening in the case of depressurization.
  • Emergency tightening is caused by pressurizing the compartment 46 using a barometric capsule 52. This capsule is subjected to ambient pressure. It is provided with a push rod 54 which causes the forced opening of a valve 56 when the ambient pressure drops below a predetermined value. The valve 56 then communicates the arrival of pressurized respiratory gas with the compartment 46 connected to the atmosphere by a constriction 58 making it possible then to cause the slow deflation of the compartment 46.
  • a non-return valve 60 connects the downstream of the valve 56 to the internal volume of the housing 12 and to the harness, to avoid discharging in the open air.
  • the capsule In the event of depressurization while the rack is in the intermediate position, the capsule causes the compartment 46 to be pressurized and the rack to be completely reset.
  • the throttle 58 does not allow the pressure to drop in the compartment 46 until it is no longer supplied by the valve 56.
  • the non-return valve 60 prevents the flow in the open air when the compartment 46 is pressurized.

Landscapes

  • Health & Medical Sciences (AREA)
  • Pulmonology (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
  • Medicines Containing Material From Animals Or Micro-Organisms (AREA)
  • Professional, Industrial, Or Sporting Protective Garments (AREA)
  • Telephone Function (AREA)
  • Filters For Electric Vacuum Cleaners (AREA)
  • Thermotherapy And Cooling Therapy Devices (AREA)
  • External Artificial Organs (AREA)
  • Massaging Devices (AREA)
  • Medicines Containing Plant Substances (AREA)

Abstract

Protective breathing equipment comprises a breathing mask provided with a regulator for connection to a source of pressurized breathing gas and a harness having at least one extensible strap whose ends are connected to the mask and which includes an element that is temporarily inflatable by the pressurized gas to lengthen the strap until it is large enough to enable the user to engage the harness on the head, and exhaustible to allow the strap to press to press the mask against the face. The extensible strap is connected to the face-piece by at least one mechanical member of length that is adjustable by the user while wearing the equipment.

Description

EQUIPEMENT DE PROTECTION RESPIRATOIRE RESPIRATORY PROTECTION EQUIPMENT
A MISE EN PLACE RAPIDEQUICK SETUP
L'invention concerne les équipements de protection respiratoire comprenant un masque respiratoire, un harnais permettant une mise en place rapide sur le visage et parfois des lunettes de protection contre les fumées, intégrées ou non au masque.The invention relates to respiratory protection equipment comprising a respiratory mask, a harness allowing rapid fitting on the face and sometimes protective goggles against smoke, integrated or not in the mask.
On connait déjà (EP-A-0288391) un équipement de protection à mise en place rapide, destiné notamment au personnel navigant technique des appareils de transport de passagers, ayant un masque respiratoire muni d'un régulateur destiné à être relié à une source de gaz respiratoire sous pression (généralement de l'oxygène) et un harnais ayant au moins une sangle extensible dont les extrémités sont reliées au masque et qui comporte un élément qui est gonflable temporairement par le gaz sous pression pour allonger la sangle jusqu'à une dimension suffisante pour permettre à 1 ' utilisateur d' engager le harnais sur la tête et vidangeable pour permettre à la sangle de se serrer, d'appliquer le masque contre le visage et de le maintenir en place.We already know (EP-A-0288391) a quick-fitting protective equipment, intended in particular for technical flight personnel of passenger transport devices, having a respiratory mask provided with a regulator intended to be connected to a source of pressurized breathing gas (usually oxygen) and a harness having at least one extendable strap whose ends are connected to the mask and which has an element which is temporarily inflatable by the pressurized gas to extend the strap to a dimension sufficient to allow the user to engage the harness on the head and drainable to allow the strap to tighten, apply the mask against the face and hold it in place.
L'équipement décrit à titre d'exemple dans le document EP 0288391 permet de régler la pression dans l'élément gonflable de façon à lui donner une valeur intermédiaire entre la pression de vidange complète et la pression de gonflage complet et à réduire 1 ' inconfort créé par le port permanent du masque dans les conditions de vol où ce port est obligatoire.The equipment described by way of example in document EP 0288391 makes it possible to adjust the pressure in the inflatable element so as to give it an intermediate value between the complete drain pressure and the complete inflation pressure and to reduce the discomfort created by the permanent wearing of the mask in the flight conditions where this wearing is compulsory.
Cette solution est pleinement satisfaisante du point de vue du confort. En contrepartie, elle complique les moyens de commande de la pression. De plus, les fuites inévitables, dues par exemple à la porosité de l'élément gonflable, conduisent à une consommation de gaz respiratoire sous pression pendant les périodes où le masque est utilisé en position "confort". La présente invention vise notamment à fournir un équipement de protection respiratoire assurant un confort au moins équivalent à celui des équipements existants pendant les périodes de port du masque où il n'est pas nécessaire de l'appliquer suffisamment sur le visage pour résister à une surpression du gaz respiratoire et réduisent la consommation de gaz respiratoire pendant ces périodes .This solution is fully satisfactory from the comfort point of view. In return, it complicates the pressure control means. In addition, inevitable leaks, due for example to the porosity of the inflatable element, lead to consumption of pressurized respiratory gas during the periods when the mask is used in the "comfort" position. The present invention aims in particular to provide a respiratory protection equipment ensuring comfort at least equivalent to that of existing equipment during periods of wearing the mask where it is not necessary to apply it enough on the face to resist an overpressure of the respiratory gas and reduce the consumption of breathing gas during these periods.
Dans ce but 1 ' invention propose notamment un équipement du genre ci-dessus défini, dont la sangle extensible est reliée au couvre-face par au moins un organe mécanique de longueur réglable par l'utilisateur pendant le port de 1 ' équipement .For this purpose, the invention provides in particular an equipment of the kind defined above, the extendable strap of which is connected to the face cover by at least one mechanical member of length adjustable by the user during the wearing of the equipment.
Cet organe mécanique peut être constitué par une crémaillère fixée à une extrémité de la sangle et un cliquet porté par le couvre-face, autorisant le déplacement relatif de la sangle et du couvre-face dans le sens du serrage, le cliquet étant désarmable pour autoriser le déplacement de la crémaillère dans le sens opposé. Cette disposition peut être inversée, la crémaillère étant alors fixée au couvre-face. La liaison pneumatique entre le couvre- face, qui porte les moyens commandables par l'utilisateur pour alimenter l'élément gonflable, et cet élément gonflable est prévue pour autoriser un coulissement relatif. Pour que la commande de gonflage provoque la venue de la crémaillère en position de serrage maximum, ce résultat peut être atteint en prolongeant la crémaillère par un piston creux déplaçable dans un cylindre solidaire du couvre-face. Le piston sépare alors le cylindre en deux compar iments, dont l'un est relié à l'alimentation de l'élément gonflable et l'autre à l'atmosphère. L'équipement de protection peut être complété par une capsule anéroïde constituant un détecteur altimétrique et provoquant automatiquement la mise en pression du compartiment du cylindre provoquant le serrage maximum en cas de dépressurisation ambiante. Les caractéristiques ci-dessus ainsi que d'autres apparaîtront mieux à la lecture de la description qui suit de modes particuliers de réalisation donné à titre d'exemples non limitatifs. La description se réfère aux dessins qui l'accompagnent, dans lesquels :This mechanical member can be constituted by a rack fixed to one end of the strap and a pawl carried by the face cover, allowing the relative movement of the strap and the face cover in the tightening direction, the pawl being disarmable to allow moving the rack in the opposite direction. This arrangement can be reversed, the rack then being fixed to the face cover. The pneumatic connection between the face cover, which carries the user-controllable means for supplying the inflatable element, and this inflatable element is provided to allow relative sliding. So that the inflation control causes the rack to come into the maximum tightening position, this result can be achieved by extending the rack by a hollow piston displaceable in a cylinder secured to the face cover. The piston then separates the cylinder into two compar iments, one of which is connected to the supply of the inflatable element and the other to the atmosphere. The protective equipment can be supplemented by an aneroid capsule constituting an altimetric detector and automatically causing the pressurization of the cylinder compartment causing maximum tightening in the event of ambient depressurization. The above characteristics as well as others will appear better on reading the description which follows particular embodiments given by way of nonlimiting examples. The description refers to the accompanying drawings, in which:
- la figure 1 est une vue en perspective montrant l'aspect extérieur d'un équipement de protection permettant de mettre en oeuvre 1 ' invention- Figure 1 is a perspective view showing the external appearance of protective equipment for implementing one invention
- la figure 2 est une vue schématique en coupe et à grande échelle montrant les constituants de 1 ' équipement permettant une mise en place rapide et le réglage de la pression du masque sur le visage.- Figure 2 is a schematic sectional view on a large scale showing the components of one piece of equipment allowing rapid fitting and adjustment of the pressure of the mask on the face.
- la figure 3, similaire à une fraction de la figure 2, montre une variante de réalisation.- Figure 3, similar to a fraction of Figure 2, shows an alternative embodiment.
L'équipement respiratoire de secours montré sur la figure 1 représenté dans l'état où il se trouve lorsque le harnais est gonflé, peut être regardé comme comportant un masque 8 et un harnais 10. Le masque représenté a un couvre-face oronasal fixé à un régulateur à la demande 13 et à un bloc de connexion rigide 12. Le bloc de connexion est muni d'un raccord de liaison avec une conduite flexible 14 destiné à se raccorder à une source de gaz respiratoire sous pressionRespiratory rescue equipment shown in Figure 1 shown in the state it is in when the harness is inflated, can be viewed as having a mask 8 and a harness 10. The mask shown has an oronasal face cover attached to a demand regulator 13 and a rigid connection block 12. The connection block is provided with a connection connector with a flexible pipe 14 intended to be connected to a source of pressurized respiratory gas
(oxygène en général) . Le harnais représenté comporte deux sangles 16 constituées chacune d'un tube interne 17 en un matériau permettant au tube de s'allonger, contenu dans une gaine inextensible 19 limitant l'allongement du tube (fig. 2) . Suivant l'utilisation prévue, le régulateur sera avec ou sans dilution par de l'air aspiré dans la cabine, avec ou sans possibilité de mise en surpression.(oxygen in general). The harness shown has two straps 16 each consisting of an internal tube 17 made of a material allowing the tube to lengthen, contained in an inextensible sheath 19 limiting the elongation of the tube (fig. 2). Depending on the intended use, the regulator will be with or without dilution with air drawn into the cabin, with or without the possibility of overpressure.
Le régulateur est mis en liaison avec la conduite d'alimentation 14 par le bloc de connexion 12. Le bloc porte des moyens à commande manuelle de gonflage des sangles 16, constitués par exemple par un robinet prévu pour être actionné par pincement manuel de deux oreilles 18 portées par le bloc de connexion 12 et dont l'une est basculante.The regulator is connected to the supply line 14 by the connection block 12. The block carries means for manually controlling the inflation of the straps 16, constituted for example by a tap intended to be actuated by manual pinching of two ears 18 carried by the connection block 12 and one of which is tiltable.
Le robinet est constitué de façon à mettre en cornmunica- tion un volume intérieur du bloc de connexion 12 et les sangles 16 avec l'atmosphère lorsqu'il est libre, ce qui permet alors aux sangles de se rétracter et d'appliquer le masque contre le visage. Lorsque le robinet est actionné, il admet au contraire du gaz sous pression en provenance de la conduite d'alimentation 14 dans le volume intérieur, ce qui provoque un allongement des sangles suffisant pour permettre la mise en place rapide.The valve is constructed so as to bring into communication an internal volume of the connection block 12 and the straps 16 with the atmosphere when it is free, which then allows the straps to retract and apply the mask against the face. When the tap is actuated, it admits, on the contrary, pressurized gas coming from the supply line 14 into the interior volume, which causes a lengthening of the straps sufficient to allow rapid fitting.
Conformément à l'invention, l'une au moins des branches du harnais est reliée au régulateur à la demande par 1 ' intermédiaire d'un organe de réglage mécanique de longueur. Dans le cas illustré dans la figure 1, deux organes 20 sont prévus, chacun reliant une extrémité du harnais au régulateur ou au bloc de connexion. La longueur du tube interne 17 à 1 ' état détendu est choisie de façon que le harnais applique encore le masque sur le visage avec une pression suffisante lorsque 1 ' organe de réglage présente sa longueur minimum, même sur les porteurs ayant le tour de tête le plus faible prévu. Il est généralement admis que ce tour de tête minimum est de 56 cm.According to the invention, at least one of the branches of the harness is connected to the regulator on demand by means of a mechanical length adjusting member. In the case illustrated in FIG. 1, two members 20 are provided, each connecting one end of the harness to the regulator or to the connection block. The length of the internal tube 17 in the relaxed state is chosen so that the harness still applies the mask to the face with sufficient pressure when the adjusting member has its minimum length, even on wearers having the head circumference. lower expected. It is generally accepted that this minimum head circumference is 56 cm.
Le robinet permettant de gonfler complètement ou de vidanger le harnais peut avoir la constitution classique montrée en figure 2. Dans le boîtier du bloc de connexion rigide 12 est alors ménagé un passage 22 dans lequel est monté un plongeur 24 qui constitue un organe obturateur double. Une extrémité du passage est reliée à l'arrivée de gaz respiratoire sous pression. L'autre extrémité s'ouvre à l'atmosphère. Un premier joint torique 26 porté par le plongeur 24 s'appuie sur une portion cylindrique du passage 22 et sépare l'arrivée de gaz d'un volume intérieur du bloc lorsque le plongeur 24 est maintenu par la pression d'admis- sion en appui contre l'oreille 18 en position de repos. L'oreille 18, lorsqu'elle est déplacée manuellement dans le sens indiqué par la flèche f, repousse le plongeur jusqu'à une position où il met en communication l'arrivée de gaz et le volume intérieur. En même temps, le déplacement du plongeur amène un second joint torique 28 en appui contre une portion tronçonique du passage et sépare le volume intérieur de 1 ' atmosphère.The tap making it possible to fully inflate or drain the harness may have the conventional constitution shown in FIG. 2. In the housing of the rigid connection block 12 is then formed a passage 22 in which is mounted a plunger 24 which constitutes a double shutter member. One end of the passage is connected to the supply of pressurized respiratory gas. The other end opens to the atmosphere. A first O-ring 26 carried by the plunger 24 rests on a cylindrical portion of the passage 22 and separates the gas supply from an interior volume of the block when the plunger 24 is held by the intake pressure in support. against the ear 18 in the rest position. The ear 18, when it is moved manually in the direction indicated by the arrow f, pushes the plunger back to a position where it puts the gas supply and the interior volume into communication. At the same time, the displacement of the plunger brings a second O-ring 28 in abutment against a sectional portion of the passage and separates the internal volume from 1 atmosphere.
L'organe de réglage 20 comporte une crémaillère 30 prolongée par un embout 32 sur lequel est fixée de façon étanche l'extrémité du harnais. A l'opposé de l'embout 32, la crémaillère est prolongée par un piston annulaire 34.The adjustment member 20 comprises a rack 30 extended by a tip 32 on which the end of the harness is fixed in leaktight manner. Opposite the end piece 32, the rack is extended by an annular piston 34.
La portion de l'organe de réglage capable de coulisser par rapport à la crémaillère est constituée par un bras du boîtier 12 qui loge un cliquet de crémaillère 36 muni d'un bouton 38 de déverrouillage. Un ressort 40 repousse le cliquet 36 vers une position où il s'engage sur la crémaillère 30 et interdit le déplacement de cette dernière dans un sens correspondant à l'allongement de l'organe de réglage. Dans le bras du boîtier est également ménagé un cylindre que le piston annulaire 34 sépare un compartiment 42 relié à l'atmosphère par un orifice 44 et un second compartiment 46.The portion of the adjustment member capable of sliding relative to the rack consists of an arm of the housing 12 which houses a rack pawl 36 provided with a release button 38. A spring 40 pushes the pawl 36 towards a position where it engages on the rack 30 and prohibits the movement of the latter in a direction corresponding to the elongation of the adjusting member. In the arm of the housing is also provided a cylinder which the annular piston 34 separates a compartment 42 connected to the atmosphere by an orifice 44 and a second compartment 46.
Le volume interne du robinet communique avec le tube 17 par 1 ' intermédiaire de trous alignés pratiqués dans le bras du boîtier, dans la crémaillère 30 et dans l'embout 32. Un trajet 47 équilibre la pression qui règne dans le compar- timent 46 et la pression dans le harnais. Des joints toriques portés par le piston 34 séparent de façon étanche les compartiments 42 et 46.The internal volume of the tap communicates with the tube 17 by means of aligned holes made in the arm of the housing, in the rack 30 and in the nozzle 32. A path 47 balances the pressure prevailing in the compartment 46 and the pressure in the harness. O-rings carried by the piston 34 sealingly separate the compartments 42 and 46.
Le mode d'utilisation de l'équipement est alors le suivant . Mise en place : lorsque l'utilisateur souhaite mettre le masque qui est placé dans une boîte de stockage, il le saisit par le bloc de connexion 12, le sort de la boîte et presse les oreilles 18. L'arrivée de gaz respiratoire est alors reliée au harnais et, par l'intermédiaire du passage 47, dans le compartiment 46. La force exercée sur le piston annulaire 34 le déplace, vers la droite dans le cas de la figure 2, et amène l'organe de réglage dans sa position de longueur minimale. Lorsque l'utilisateur a placé le masque sur son visage, il relâche les oreilles 18. Le masque s'applique sur le visage avec une force maximale.The mode of use of the equipment is then as follows. Installation: when the user wishes to put the mask which is placed in a storage box, he grabs it by the connection block 12, takes it out of the box and presses the ears 18. The arrival of respiratory gas is then connected to the harness and, via the passage 47, in the compartment 46. The force exerted on the annular piston 34 moves it, to the right in the case of FIG. 2, and brings the adjustment member into its position minimum length. When the user has placed the mask on his face, he releases the ears 18. The mask is applied to the face with a maximum strength.
Réduction du serrage :Tightening reduction:
Pour réduire le serrage, il suffit à l'utilisateur d'exercer une courte pression sur le poussoir 38 pour dégager temporairement le cliquet 36. La crémaillère peut alors reculer. Dès que le poussoir 38 n'est plus actionné, le cliquet 36 verrouille de nouveau la crémaillère sous l'action du ressort 40.To reduce the tightening, it suffices for the user to exert a short pressure on the pusher 38 to temporarily release the pawl 36. The rack can then move back. As soon as the pusher 38 is no longer actuated, the pawl 36 again locks the rack under the action of the spring 40.
Augmentation du serrage : Pour augmenter le serrage du masque, il suffit d'appuyer sur la crémaillère, qui peut être munie à cet effet d'une collerette 50.Increasing the tightening: To increase the tightening of the mask, it suffices to press on the rack, which can be provided for this purpose with a flange 50.
Si un serrage d'urgence est nécessaire, il peut être effectué en repoussant à fond la collerette 50 de l'organe de réglage (ou de chaque organe de réglage) . Il est également possible de provoquer ce serrage en gonflant complètement le harnais par pression sur l'oreille 18. Le compartiment 46 est alors mis en pression et "réarme" la crémaillère en l'amenant dans sa position la plus à droite. Dès relâchement de l'oreille, le harnais revient en position de serrage maximum.If emergency tightening is necessary, it can be carried out by pushing the flange 50 of the adjustment member (or each adjustment member) fully back. It is also possible to cause this tightening by fully inflating the harness by pressing on the ear 18. The compartment 46 is then put under pressure and "rearms" the rack by bringing it to its rightmost position. As soon as the ear is released, the harness returns to the maximum tightening position.
Pour rendre le réglage plus progressif, il est possible de remplacer l'ensemble cliquet-monobloc 36 - poussoir 38 par deux pièces couplées par un ressort et de munir le poussoir d'un cliquet capable de s'engager dans une denture appropriée de la crémaillère 30. Cette seconde denture de la crémaillère n'autorise qu'une avance d'un pas à chaque pression sur le poussoir 38.To make the adjustment more gradual, it is possible to replace the pawl-monobloc assembly 36 - pusher 38 by two parts coupled by a spring and to provide the pusher with a pawl capable of engaging in an appropriate toothing of the rack. 30. This second toothed rack allows only one step forward each time the pusher 38 is pressed.
Enlèvement du masque :Removal of the mask:
Lorsque l'utilisateur souhaite replacer le masque dans sa boîte, il gonfle complètement le harnais par action sur l'oreille 18. La pression dans le compartiment 46 réarme automatiquement la crémaillère. Une fois le masque enlevé, l'utilisateur n'a qu'à relâcher l'oreille 18 pour que le harnais devienne souple et permette le stockage dans un état tel que le serrage sera maximum en cas de remise en place de l'équipement sur la tête. Dans le cas où deux organes de réglage mécanique sont prévus, il suffit qu'un des deux présente une liaison pneumatique avec les sangles.When the user wishes to replace the mask in its box, it fully inflates the harness by action on the ear 18. The pressure in the compartment 46 automatically rearms the rack. Once the mask has been removed, the user only has to release the ear 18 so that the harness becomes flexible and allows storage in a state such that the tightening will be maximum in the event of replacement of the equipment on the head. In the case where two mechanical adjustment members are provided, it suffices that one of the two has a pneumatic connection with the straps.
La figure 3 montre une variante de réalisation provoquant un serrage maximal dans le cas de dépressurisation. Sur la figure 3, sont représentés certains des éléments déjà montrés en figure 2, désignés par le même numéro de référence. Le serrage d'urgence est provoqué par mise en pression du compartiment 46 à l'aide d'une capsule barométrique 52. Cette capsule est soumise à la pression ambiante. Elle est munie d'une tige poussoir 54 qui provoque l'ouverture forcée d'un clapet 56 lorsque la pression ambiante descend au-dessous d'une valeur pré-déterminée. Le clapet 56 met alors en communication l'arrivée de gaz respiratoire sous pression avec le compartiment 46 relié à l'atmosphère par un étranglement 58 permettant de provoquer ensuite le dégonflage lent du compartiment 46. Un clapet anti-retour 60 relie l'aval du clapet 56 au volume interne du boîtier 12 et au harnais, pour éviter de débiter à l'air libre. En cas de dépressurisation alors que la crémaillère est en position intermédiaire, la capsule provoque la mise en pression du compartiment 46 et le réarmement complet de la crémaillère. L'étranglement 58 ne permet à la pression de baisser dans le compartiment 46 qu'à partir du moment où il n'est plus alimenté par le clapet 56. Le clapet anti-retour 60 empêche de son côté le débit à l'air libre lors de la mise en pression du compartiment 46. Figure 3 shows an alternative embodiment causing maximum tightening in the case of depressurization. In Figure 3 are shown some of the elements already shown in Figure 2, designated by the same reference number. Emergency tightening is caused by pressurizing the compartment 46 using a barometric capsule 52. This capsule is subjected to ambient pressure. It is provided with a push rod 54 which causes the forced opening of a valve 56 when the ambient pressure drops below a predetermined value. The valve 56 then communicates the arrival of pressurized respiratory gas with the compartment 46 connected to the atmosphere by a constriction 58 making it possible then to cause the slow deflation of the compartment 46. A non-return valve 60 connects the downstream of the valve 56 to the internal volume of the housing 12 and to the harness, to avoid discharging in the open air. In the event of depressurization while the rack is in the intermediate position, the capsule causes the compartment 46 to be pressurized and the rack to be completely reset. The throttle 58 does not allow the pressure to drop in the compartment 46 until it is no longer supplied by the valve 56. The non-return valve 60 prevents the flow in the open air when the compartment 46 is pressurized.

Claims

REVENDICATIONS
1. Equipement de protection respiratoire comprenant un masque respiratoire muni d'un régulateur destiné à être relié à une source de gaz respiratoire sous pression (généralement de l'oxygène) et un harnais ayant au moins une sangle extensible dont les extrémités sont reliées au masque et qui comporte un élément (17) qui est gonflable temporairement par le gaz sous pression pour allonger la sangle jusqu'à une dimension suffisante pour permettre à 1 ' utilisateur d ' engager le harnais sur la tête et vidangeable pour permettre à la sangle de se serrer, d'appliquer le masque contre le visage et de le maintenir en place, caractérisée en ce que la sangle extensible est reliée au couvre-face par au moins un organe mécanique (20) de longueur réglable par l'utilisateur pendant le port de 1 ' équipement .1. Respiratory protection equipment comprising a respiratory mask provided with a regulator intended to be connected to a source of pressurized respiratory gas (generally oxygen) and a harness having at least one extensible strap whose ends are connected to the mask and which includes an element (17) which is temporarily inflatable by the pressurized gas to lengthen the strap to a size sufficient to allow the user to engage the harness on the head and drainable to allow the strap to tighten, apply the mask against the face and hold it in place, characterized in that the extensible strap is connected to the face cover by at least one mechanical member (20) of length adjustable by the user during the wearing of 1 equipment.
2. Equipement selon la revendication 1, caractérisé en ce que l'organe mécanique comprend une crémaillère (30) fixée à une extrémité de la sangle et un cliquet (36) porté par le couvre-face, autorisant le déplacement relatif de la sangle et du couvre- face dans le sens du serrage, le cliquet étant désarmable pour autoriser le déplacement de la crémaillère dans le sens opposé au serrage.2. Equipment according to claim 1, characterized in that the mechanical member comprises a rack (30) fixed to one end of the strap and a pawl (36) carried by the face cover, allowing the relative movement of the strap and of the cover in the tightening direction, the pawl being disarmable to allow the rack to move in the opposite direction to the tightening.
3. Equipement selon la revendication 2, caractérisé en ce que le cliquet est désarmable à l'aide d'un poussoir (38) agissant à 1 ' encontre d'un ressort (40).3. Equipment according to claim 2, characterized in that the pawl is disarmable using a pusher (38) acting against one spring (40).
4. Equipement selon la revendication 2 ou 3 , caractérisé en ce que la crémaillère est prolongée par un piston annulaire (34) creux déplaçable dans un cylindre solidaire du couvre-face, le piston séparant le cylindre en deux compartiments, dont le premier est relié à l'alimentation de l'élément gonflable et l'autre est muni d'une fuite calibrée à l'atmosphère, la mise en pression du premier compartiment provoquant le déplacement de la crémaillère. 4. Equipment according to claim 2 or 3, characterized in that the rack is extended by a hollow annular piston (34) movable in a cylinder secured to the face cover, the piston separating the cylinder into two compartments, the first of which is connected to the supply of the inflatable element and the other is provided with a calibrated leak to the atmosphere, the pressurization of the first compartment causing the displacement of the rack.
5. Equipement selon la revendication 4, caractérisé en ce qu'il comporte une capsule anéroïde (52) constituant un détecteur altimetrique et mettant automatiquement le premier compartiment du cylindre en liaison avec la source pour provoquer le serrage maximum en cas de dépressurisation ambiante. 5. Equipment according to claim 4, characterized in that it comprises an aneroid capsule (52) constituting a altimetric detector and automatically putting the first compartment of the cylinder in connection with the source to cause maximum tightening in the event of ambient depressurization.
6. Equipement selon la revendication 5, caractérisé en ce que la capsule anéroïde commande un clapet de mise en liaison du premier compartiment avec l'arrivée de gaz respiratoire sous pression.6. Equipment according to claim 5, characterized in that the aneroid capsule controls a valve for connecting the first compartment with the arrival of pressurized respiratory gas.
7. Equipement selon la revendication 2 ou 3, caractérisé en ce qu'il comprend une capsule anéroïde de serrage automatique de l'organe mécanique en cas de dépressurisation. 7. Equipment according to claim 2 or 3, characterized in that it comprises an aneroid capsule for automatic clamping of the mechanical member in the event of depressurization.
EP99918026A 1998-05-12 1999-05-07 Protective breathing equipment with fast positioning Expired - Lifetime EP1077743B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9805949A FR2778575B1 (en) 1998-05-12 1998-05-12 RESPIRATORY PROTECTION EQUIPMENT WITH FAST SETUP
FR9805949 1998-05-12
PCT/FR1999/001087 WO1999058197A1 (en) 1998-05-12 1999-05-07 Protective breathing equipment with fast positioning

Publications (2)

Publication Number Publication Date
EP1077743A1 true EP1077743A1 (en) 2001-02-28
EP1077743B1 EP1077743B1 (en) 2004-09-22

Family

ID=9526246

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99918026A Expired - Lifetime EP1077743B1 (en) 1998-05-12 1999-05-07 Protective breathing equipment with fast positioning

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US (1) US6470887B1 (en)
EP (1) EP1077743B1 (en)
JP (1) JP2002514482A (en)
KR (1) KR20010043518A (en)
CN (1) CN1146456C (en)
AT (1) ATE276799T1 (en)
AU (1) AU3609799A (en)
DE (1) DE69920441T2 (en)
ES (1) ES2229700T3 (en)
FR (1) FR2778575B1 (en)
ID (1) ID29278A (en)
NO (1) NO320451B1 (en)
RU (1) RU2214845C2 (en)
UA (1) UA55535C2 (en)
WO (1) WO1999058197A1 (en)

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Also Published As

Publication number Publication date
JP2002514482A (en) 2002-05-21
FR2778575B1 (en) 2000-07-28
ES2229700T3 (en) 2005-04-16
ATE276799T1 (en) 2004-10-15
NO20005695D0 (en) 2000-11-10
KR20010043518A (en) 2001-05-25
DE69920441D1 (en) 2004-10-28
UA55535C2 (en) 2003-04-15
US6470887B1 (en) 2002-10-29
AU3609799A (en) 1999-11-29
NO320451B1 (en) 2005-12-05
NO20005695L (en) 2001-01-10
FR2778575A1 (en) 1999-11-19
CN1146456C (en) 2004-04-21
EP1077743B1 (en) 2004-09-22
CN1300228A (en) 2001-06-20
RU2214845C2 (en) 2003-10-27
DE69920441T2 (en) 2005-11-10
WO1999058197A1 (en) 1999-11-18
ID29278A (en) 2001-08-16

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