EP0691871A1 - Protective headgear with respiratory mask and eye shield - Google Patents

Protective headgear with respiratory mask and eye shield

Info

Publication number
EP0691871A1
EP0691871A1 EP95908985A EP95908985A EP0691871A1 EP 0691871 A1 EP0691871 A1 EP 0691871A1 EP 95908985 A EP95908985 A EP 95908985A EP 95908985 A EP95908985 A EP 95908985A EP 0691871 A1 EP0691871 A1 EP 0691871A1
Authority
EP
European Patent Office
Prior art keywords
mask
screen
slide
equipment according
face
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
EP95908985A
Other languages
German (de)
French (fr)
Other versions
EP0691871B1 (en
Inventor
Alain Dubruille
Frédéric BERTHET
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 EP0691871A1 publication Critical patent/EP0691871A1/en
Application granted granted Critical
Publication of EP0691871B1 publication Critical patent/EP0691871B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • A62B18/082—Assembling eyepieces, lenses or vision-correction means in or on gas-masks
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B7/00—Respiratory apparatus
    • A62B7/14—Respiratory apparatus for high-altitude aircraft

Definitions

  • the present invention relates to head protection equipment of the type comprising a respiratory mask provided with a harness and connectable to a source of breathable gas making it possible to put the mask under overpressure with respect to the atmosphere and a screen of protection.
  • eye protection against smoke provided with a peripheral seal on the face and on the mask, the mask and the screen being separable and distinct from each other.
  • Head protection equipment of the type defined above is already known.
  • the respiratory mask fitted with a regulator, protects the wearer of the mask against hypoxia and the entry of smoke or toxic gas into the respiratory tract.
  • the harness allows the mask to be applied to the face with sufficient pressure to ensure the seal.
  • the protective screen protects the eyes against smoke from irritating gases when it is in place.
  • the invention finds a particularly important, although not exclusive, application in aeronautics.
  • the mask is then in particular provided to provide protection against hypoxia in the event of depressurization at a high altitude, which requires that it be provided with a regulator on demand for overpressure supply as a function of the altitude. study and that the harness then allows the mask to be applied with sufficient force to avoid the appearance of leaks reducing the overpressure in the mask.
  • the harness may consist of a strap exerting an adjustable application force, either automatically (for example by modification of an internal pressure when the straps are extensible by swelling) or manually (for example, when the harness includes, in addition to pneumatic expandable straps, fabric straps, loose in the mask storage position and manually squeezable).
  • the present invention aims in particular to provide head protection equipment that better meets those previously known to the requirements of practice, in particular in that it allows either convenient use of the mask alone and rapid fitting of the screen. if necessary, or use the mounted screen regulator mask and remove the screen part if the user so wishes.
  • the invention provides in particular an equipment of the type defined above, characterized in that it comprises means for locking the screen on the mask, which can be disarmed manually and which rests on the mask to apply the seal on the face.
  • the screen is advantageously provided with means automatically opening a breathable gas inlet from the inside of the mask towards the inside of the mask. the screen during its installation and locking.
  • the overpressure relative to the atmosphere (which will always be provided in the mask, even at normal atmospheric pressure to prevent these same fumes and gases from reaching the respiratory tract) will cause the passage of respiratory gas inside the screen and a scavenging evacuation of smoke and trapped gases.
  • the harness can be quick to set up, adaptable to any size of head or helmet (such as, for example, those described in document EP-A-028839 and application FR n ° 9311342); it can also be made up of straps fitted with tightening loops, which will be the case in particular in the event of use not requiring rapid installation.
  • FIG. 1 shows the external appearance of protective equipment according to an embodiment of the invention, using a mask provided with a demand regulator and a harness with inflatable straps;
  • FIG. 2 is a partial section view of a fraction of the mask and of the screen, showing means intended to open a communication between the interior of the mask and
  • FIG. 3 is a sectional view showing a possible constitution of means for locking the screen on the mask
  • Figure 4 is a detailed perspective view showing the part of the locking means of Figure 3 which is carried by the mask;
  • Figures 5 and 6, similar to Figures 3 and 4, show another embodiment from ver ⁇ rusting means;
  • FIG. 9 is a sectional view schematically showing means making it possible to increase the pressure for applying the mask to the face when the screen is rusted in order to compensate for the lifting effort ⁇ additional due to the behavior of the oronasal part when using the overpressure regulating mask.
  • the protective equipment shown schematically in Figures 1 and 2 includes a mask and a harness having a known general constitution. We can for example find a description in document EP-A 0288391.
  • the mask comprises an oro-nasal face cover 10 fixed to a demand regulator 12 and a rigid connection block 14.
  • the block 14 is integral with a shell 16 covering the front of the face cover.
  • connection block 14 is intended to be connected to a source of pressurized respiratory gas (oxygen under pressure in general) by a flexible tube 15.
  • the harness shown by way of example comprises two straps 18, each consisting of a tube internal in elastic material contained in an inextensible sheath limiting the elongation of the tube and connected to the block 14.
  • the sheaths have a length such that they allow the passage of the harness over the heads of all sizes, when the two tubes are inflated by pressing levers 20.
  • the tubes have an elasticity which ensures sufficient head tightening to use the respiratory equipment with pressurized gas supply.
  • the screen 22 comprises a transparent window 24 presenting an optical quality, the edges of which are trapped in a seal 26 and which is extended by a block 28 for fixing to the shell of the mask.
  • the upper part of the seal 26, intended to be applied to the forehead and the temples, may have a conventional constitution.
  • the lower part of the seal which must be applied to the areas of the face and of the shell having concave parts, is advantageously formed in the form of a strip of foam material, ensuring a large contact surface. In use, this lower part is housed under the upper strap 18.
  • the upper strap can be moved away from the face, in the area close to its connection with the shell, for example by guiding by a section of rigid tube over a few centimeters.
  • the lower part of the seal has a wedge shape so as to raise the upper strap when the screen is placed on the mask already worn by the user.
  • the screen 22 and the mask are advantageously provided so as to organize a circulation of respiratory gas in the screen when the latter is in place. It is in particular possible to admit, automatically or not, respiratory gas from the interior of the mask towards the interior of the screen, by means of means which are closed when the screen is not in place. Breathing gas can leak out between the seal and the skin. Slits may also be provided in the upper part of the seal, so as to guide the sweeping air.
  • FIG. 2 shows, by way of example, means for admitting the respiratory gas comprising a valve which can be placed partly on the edge of the shell 16 of the mask and partly on the seal 10.
  • This valve comprises a seat 30 , through which holes are placed, placed in the face cover, and a shutter lever 32 rotating on an axis 34 belonging to the shell. The seal is ensured by the seal 31.
  • a spring 36 pushes the lever 32 towards the seat 30.
  • the fixing block 28 belonging to the screen comprises a pallet 38 which, when the screen is in place, presses on the one of the ends of the lever 32 so as to raise the other end of the seat 30 and to open a communication with the interior of the screen.
  • Other constitutions would obviously be possible.
  • the fixing block 28 is provided to allow rapid installation on the shell 16 of the mask.
  • the fixing means can have very diverse constitutions and only a few embodiments will be given by way of example.
  • the fixing block belonging to the screen comprises a slide 40 with balls 42 pushed by a spring towards a projecting position.
  • the slide is designed to engage in a slide 44 secured to the shell 16.
  • Housing 46 is provided in the slide to receive the balls and automatically lock the slide 40.
  • Two pushers 48 are placed on either side of the slide to push the balls and manually unlock the screen when not in use and can be removed.
  • the slide is fixed to the screen and the slide to the shell.
  • a soft iron bar 50 is incorporated into the fixing block 28.
  • This bar is designed to engage in a slide 52 integral with the shell 16 and to be retained there by a field electro-magnetic created by coils 54 embedded in the slide, when these coils are powered.
  • Means such as a pallet 56, placed so as to be actuated by the bar 50 at the end of introduction of the latter, are provided for supplying the coils.
  • the unlocking can be carried out by manual action on a switch, using a plunger 58 similar to the plungers 48 of FIG. 4.
  • the mask is manually locked after placement.
  • the fixing block secured to the screen also comprises a slide 60, intended to engage in a slide 62 secured to the shell 16.
  • Two latches 64 controlled manually, make it possible to lock the slide, when it is fully engaged, by bringing them closer by action to the wearer's fingers. Unlocking can then be obtained using a button 66, trapped in the slider 60, that the depression of the latches 64 pushes back towards the projecting position shown in FIG. 7.
  • the user unlocks the screen by pressing the button 66, which acts on inclined sides of the locks 64, separates them from one another and drives them from the slide.
  • the latches 64 are biased towards each other by springs.
  • FIG. 9 shows means which can be provided to achieve this result.
  • the fixing block comprises, in the case illustrated in FIG. 9, a guide 68 intended to engage in a base 70 which can be in one piece with the slide belonging to the means for fixing the mask.
  • a guide 68 intended to engage in a base 70 which can be in one piece with the slide belonging to the means for fixing the mask.
  • On this guide is articulated the rear of a lever 72.
  • a spring 74 is interposed between the other end of the lever and the guide 68.
  • the screen will be devoid of a clean harness and the fixing block 28 will be provided so as to apply the seal 26 with sufficient force, despite the mounting of the screen in cantilever with respect to in the mask.
  • the fixing block 28 will be provided so as to apply the seal 26 with sufficient force, despite the mounting of the screen in cantilever with respect to in the mask.
  • the equipment In an airplane, the equipment is generally stored in a box within the pilot's reach. Outside the periods of use, the mask will be stored with the screen locked on it, so that in an emergency the pilot can place the mask-screen assembly on the face, have breathing oxygen in places provided for by the regulations in force and be protected against smoke. If the circumstances do not then require the wearing of the screen, the pilot can remove it. To avoid forgetting, the storage box is advantageously provided so that the mask cannot be stored there again until the screen is fixed on it.

Abstract

The head protection device includes a respirator mask with straps, connectable to a breathable gas source, and a shield (22) for protecting the user's eyes from smoke, with a peripheral seal (26) bearing upon the user's face and the mask. Said mask and shield are discrete and separable. Manually dismantable means for locking the shield onto the mask are engaged said mask to apply said peripheral seal onto the face. This device is particularly useful for technical in-flight personnel on aircraft.

Description

EQUIPEMENT DE PROTECTION DE TETE HEAD PROTECTION EQUIPMENT
A MASQUE RESPIRATOIRE ET ECRAN OPTIQUEWITH RESPIRATORY MASK AND OPTICAL SCREEN
La présente invention a pour objet un équipement de protection de tête du type comprenant un masque respiratoire muni d'un harnais et raccordable à une source de gaz respira- ble permettant de mettre le masque en surpression par rapport à l'atmosphère et un écran de protection des yeux contre les fumées, muni d'un joint d' étanchéité périphérique d'appui sur le visage et sur le masque, le masque et l'écran étant séparables et distincts l'un de l'autre.The present invention relates to head protection equipment of the type comprising a respiratory mask provided with a harness and connectable to a source of breathable gas making it possible to put the mask under overpressure with respect to the atmosphere and a screen of protection. eye protection against smoke, provided with a peripheral seal on the face and on the mask, the mask and the screen being separable and distinct from each other.
On connaît déjà des équipements de protection de tête du type ci-dessus défini. Le masque respiratoire, muni d'un régulateur, protège le porteur du masque contre l'hypoxie et l'entrée de fumée ou gaz toxique dans les voies respiratoi- res. Le harnais permet d'appliquer le masque sur le visage avec une pression suffisante pour assurer 1 ' étanchéité. L'écran de protection protège les yeux contre les fumées des gaz irritants lorsqu'il est en place.Head protection equipment of the type defined above is already known. The respiratory mask, fitted with a regulator, protects the wearer of the mask against hypoxia and the entry of smoke or toxic gas into the respiratory tract. The harness allows the mask to be applied to the face with sufficient pressure to ensure the seal. The protective screen protects the eyes against smoke from irritating gases when it is in place.
L'invention trouve une application particulièrement importante, bien que non exclusive, en aéronautique. Le masque est alors notamment prévu pour assurer la protection contre l'hypoxie en cas de dépressurisation à une altitude élevée, ce qui exige qu'il soit muni d'un régulateur à la demande d'alimentation en surpression en fonction de l'alti- tude et que le harnais permette alors d'appliquer le masque avec une force suffisante pour éviter l'apparition de fuites réduisant la surpression dans le masque. Pour remplir ces conditions, le harnais peut être constitué d'une sangle exerçant une force d'application réglable, soit automa- tiquement (par exemple par modification d'une pression interne lorsque les sangles sont extensibles par gonflement) soit manuellement (par exemple, lorsque le harnais comporte, en plus de sangles extensibles pneu atiquement, des sangles en tissu, lâches en position de stockage du masque et serrables manuellement) . On a déjà proposé des ensembles masque-écran d'un seul bloc (US des. pat. 304 384) qui représentent une solution satisfaisante lorsque le masque est prévu pour n'être mis en place qu'en cas d'incident. Cette solution est difficilement acceptable dans d'autres cas, tels que celui de l'équipement destiné aux pilotes et co-pilotes d'avions de transport qui sont contraints, par la réglementation, de porter l'équipe¬ ment de protection contre l'hypoxie en permanence dans certaines conditions de vol, et notamment à très haute altitude ou lorsqu'un seul pilote est présent dans la cabine. L'écran constitue alors une gêne et, de plus, donne une sensation de claustrophobie.The invention finds a particularly important, although not exclusive, application in aeronautics. The mask is then in particular provided to provide protection against hypoxia in the event of depressurization at a high altitude, which requires that it be provided with a regulator on demand for overpressure supply as a function of the altitude. study and that the harness then allows the mask to be applied with sufficient force to avoid the appearance of leaks reducing the overpressure in the mask. To fulfill these conditions, the harness may consist of a strap exerting an adjustable application force, either automatically (for example by modification of an internal pressure when the straps are extensible by swelling) or manually (for example, when the harness includes, in addition to pneumatic expandable straps, fabric straps, loose in the mask storage position and manually squeezable). We have already proposed mask-screen assemblies in a single block (US Pat. No. 304,384) which represent a satisfactory solution when the mask is intended to be put in place only in the event of an incident. This solution is hardly acceptable in other cases, such as that of the equipment intended for the pilots and co-pilots of transport aircraft which are constrained, by the regulations, to wear the protective equipment against hypoxia permanently in certain flight conditions, and in particular at very high altitude or when only one pilot is present in the cabin. The screen then constitutes an embarrassment and, moreover, gives a feeling of claustrophobia.
La présente invention vise notamment à fournir un équipement de protection de tête répondant mieux que ceux antérieurement connus aux exigences de la pratique, notamment en ce qu'il permet ou bien une utilisation commode du masque seul et une mise en place rapide de 1' écran en cas de besoin ou bien une utilisation du masque régulateur écran monté et un enlèvement de la partie écran si l'utilisateur le souhai- te. Dans ce but, l'invention propose notamment un équipement du type ci-dessus défini, caractérisé en ce qu'il comporte des moyens de verrouillage de l'écran sur le masque, désarma- bles manuellement et prenant appui sur le masque pour appliquer le joint sur le visage. Pour éviter le maintien de fumées et de gaz toxiques ou irritants au contact des yeux, et éviter la formation de buée, l'écran est avantageusement muni de moyens ouvrant automatiquement une entrée de gaz respirable de l'intérieur du masque vers l'intérieur de l'écran lors de la mise en place et du verrouillage de ce dernier. La surpression par rapport à l'atmosphère (qui sera toujours prévue dans le masque, même à pression atmosphérique normale pour éviter que ces mêmes fumées et gaz n'accèdent aux voies respiratoires) provoquera le passage de gaz respiratoire à 1' intérieur de l'écran et un balayage d'évacuation des fumées et des gaz emprisonnés. Le harnais peut être à mise en place rapide, adaptable sur toute taille de tête ou de casque (tel que, par exemple, ceux décrits dans le document EP-A-028839 et la demande FR n° 9311342) ; il peut aussi être constitué de sangles munies de boucles de serrage, ce qui sera notamment le cas en cas d'utilisation n'exigeant pas une mise en place rapide.The present invention aims in particular to provide head protection equipment that better meets those previously known to the requirements of practice, in particular in that it allows either convenient use of the mask alone and rapid fitting of the screen. if necessary, or use the mounted screen regulator mask and remove the screen part if the user so wishes. To this end, the invention provides in particular an equipment of the type defined above, characterized in that it comprises means for locking the screen on the mask, which can be disarmed manually and which rests on the mask to apply the seal on the face. To avoid the maintenance of toxic or irritating fumes and gases in contact with the eyes, and to prevent the formation of fogging, the screen is advantageously provided with means automatically opening a breathable gas inlet from the inside of the mask towards the inside of the mask. the screen during its installation and locking. The overpressure relative to the atmosphere (which will always be provided in the mask, even at normal atmospheric pressure to prevent these same fumes and gases from reaching the respiratory tract) will cause the passage of respiratory gas inside the screen and a scavenging evacuation of smoke and trapped gases. The harness can be quick to set up, adaptable to any size of head or helmet (such as, for example, those described in document EP-A-028839 and application FR n ° 9311342); it can also be made up of straps fitted with tightening loops, which will be the case in particular in the event of use not requiring rapid installation.
L'invention sera mieux comprise à la lecture de la description qui suit, de modes particuliers de réalisation, donnés à titre d'exemples non limitatifs. La description se réfère aux dessins qui l'accompagnent, dans lesquels :The invention will be better understood on reading the following description of particular embodiments, given by way of nonlimiting examples. The description refers to the accompanying drawings, in which:
La figure 1 montre l'aspect extérieur d'un équipement de protection conforme à un mode de réalisation de l'invention, utilisant un masque muni d'un régulateur à la demande et d'un harnais à sangles gonflables ; La figure 2 est une vue en coupe partielle d'une fraction du masque et de l'écran, montrant des moyens destinés à ouvrir une communication entre l'intérieur du masque etFIG. 1 shows the external appearance of protective equipment according to an embodiment of the invention, using a mask provided with a demand regulator and a harness with inflatable straps; FIG. 2 is a partial section view of a fraction of the mask and of the screen, showing means intended to open a communication between the interior of the mask and
1 ' intérieur de 1 ' écran lors de la mise en place de 1 ' écran ;1 interior of the screen when setting up the screen;
La figure 3 est une vue en coupe montrant une constitu- tion possible de moyens de verrouillage de l'écran sur le masque ;FIG. 3 is a sectional view showing a possible constitution of means for locking the screen on the mask;
La figure 4 est une vue de détail en perspective montrant la partie des moyens de verrouillage de la figure 3 qui est portée par le masque ; Les figures 5 et 6, similaires aux figures 3 et 4, montrent un autre mode de réalisation dès moyens de ver¬ rouillage ;Figure 4 is a detailed perspective view showing the part of the locking means of Figure 3 which is carried by the mask; Figures 5 and 6, similar to Figures 3 and 4, show another embodiment from ver¬ rusting means;
Les figures 7 et 8, encore similaires aux figures 3 et 4, montrent une autre variante encore ; et La figure 9 est une vue en coupe montrant schématiquement des moyens permettant d'augmenter la pression d'application du masque sur le visage lors de la mise en place du ver¬ rouillage de l'écran, afin de compenser l'effort de soulève¬ ment supplémentaire dû au comportement de la partie oronasale lors de l'utilisation du masque régulateur en surpression. L'équipement de protection montré schématiquement en figures 1 et 2 comporte un masque et un harnais ayant une constitution générale connue. On pourra par exemple en trouver une description dans le document EP-A 0288391. Le masque comprend un couvre-face oro-nasal 10 fixé à un régulateur à la demande 12 et un bloc de connexion rigide 14. Le bloc 14 est solidaire d'une coquille 16 recouvrant l'avant du couvre-face. Le bloc de connexion 14 est destiné à être raccordé à une source de gaz respiratoire sous pression (oxygène sous pression en général) par un tube souple 15. Le harnais représenté à titre d'exemple comporte deux sangles 18, constituées chacune d'un tube interne en matériau élastique contenu dans une gaine inextensible limitant l'allongement du tube et raccordées au bloc 14. Les gaines ont une longueur telle qu'elles permettent le passage du harnais au-dessus des têtes de toutes tailles, lorsque les deux tubes sont gonflés par appui sur des manettes 20. Les tubes ont une élasticité qui assurent un serrage de la tête suffisant pour utiliser l'équipement respiratoire avec alimentation en gaz sous pression. L'écran 22 comporte une fenêtre transparente 24 présen¬ tant une qualité optique, dont les bords sont emprisonnés dans un joint d'étanchéité 26 et qui est prolongé par un bloc 28 de fixation sur la coquille du masque.Figures 7 and 8, still similar to Figures 3 and 4, show yet another variant; and FIG. 9 is a sectional view schematically showing means making it possible to increase the pressure for applying the mask to the face when the screen is rusted in order to compensate for the lifting effort ¬ additional due to the behavior of the oronasal part when using the overpressure regulating mask. The protective equipment shown schematically in Figures 1 and 2 includes a mask and a harness having a known general constitution. We can for example find a description in document EP-A 0288391. The mask comprises an oro-nasal face cover 10 fixed to a demand regulator 12 and a rigid connection block 14. The block 14 is integral with a shell 16 covering the front of the face cover. The connection block 14 is intended to be connected to a source of pressurized respiratory gas (oxygen under pressure in general) by a flexible tube 15. The harness shown by way of example comprises two straps 18, each consisting of a tube internal in elastic material contained in an inextensible sheath limiting the elongation of the tube and connected to the block 14. The sheaths have a length such that they allow the passage of the harness over the heads of all sizes, when the two tubes are inflated by pressing levers 20. The tubes have an elasticity which ensures sufficient head tightening to use the respiratory equipment with pressurized gas supply. The screen 22 comprises a transparent window 24 presenting an optical quality, the edges of which are trapped in a seal 26 and which is extended by a block 28 for fixing to the shell of the mask.
La partie supérieure du joint d'étanchéité 26, destinée à s'appliquer sur le front et les tempes, peut avoir une constitution classique. La partie inférieure du joint, qui doit s'appliquer sur les zones du visage et de la coquille ayant des parties concaves, est avantageusement constituée sous forme d'une bande en matériau mousse, assurant une surface de contact importante. Lors de l'utilisation, cette partie inférieure est logée sous la sangle supérieure 18. Pour faciliter la mise en place du masque, la sangle supérieure peut être écartée du visage, dans la zone proche de son raccordement avec la coquille, par exemple en la guidant par un tronçon de tube rigide sur quelques centimè¬ tres. Dans une variante de réalisation, la partie inférieure du joint d'étanchéité a une forme en coin de façon à soulever la sangle supérieure lorsqu'on met en place l'écran sur le masque déjà porté par l'utilisateur.The upper part of the seal 26, intended to be applied to the forehead and the temples, may have a conventional constitution. The lower part of the seal, which must be applied to the areas of the face and of the shell having concave parts, is advantageously formed in the form of a strip of foam material, ensuring a large contact surface. In use, this lower part is housed under the upper strap 18. To facilitate the fitting of the mask, the upper strap can be moved away from the face, in the area close to its connection with the shell, for example by guiding by a section of rigid tube over a few centimeters. In an alternative embodiment, the lower part of the seal has a wedge shape so as to raise the upper strap when the screen is placed on the mask already worn by the user.
L'écran 22 et le masque sont avantageusement prévus de façon à organiser une circulation de gaz respiratoire dans l'écran lorsque ce dernier est en place. Il est en particu¬ lier possible d'admettre, automatiquement ou non, du gaz respiratoire depuis l'intérieur du masque vers l'intérieur de l'écran, par l'intermédiaire de moyens qui sont fermés lorsque l'écran n'est pas en place. Le gaz respiratoire peut s'échapper par fuite entre le joint et la peau. Des fentes peuvent également être prévues dans la partie supérieure du joint, de façon à guider l'air de balayage.The screen 22 and the mask are advantageously provided so as to organize a circulation of respiratory gas in the screen when the latter is in place. It is in particular possible to admit, automatically or not, respiratory gas from the interior of the mask towards the interior of the screen, by means of means which are closed when the screen is not in place. Breathing gas can leak out between the seal and the skin. Slits may also be provided in the upper part of the seal, so as to guide the sweeping air.
La figure 2 montre, à titre d'exemple, des moyens d'admission du gaz respiratoire comportant une soupape qui peut être placée partie sur l'arête de la coquille 16 du masque et partie sur le joint 10. Cette soupape comprend un siège 30, traversé par des trous, placé dans le couvre-face, et un levier d'obturation 32 tournant sur un axe 34 apparte- nant à la coquille. L'étanchéité est assurée par le joint 31. Un ressort 36 repousse le levier 32 vers le siège 30. Le bloc de fixation 28 appartenant à l'écran comporte une palette 38 qui, lorsque l'écran est en place, appuie sur l'une des extrémités du levier 32 de façon à soulever l'autre extrémité du siège 30 et à ouvrir une communication avec l'intérieur de l'écran. D'autres constitutions seraient évidemment possi¬ bles.FIG. 2 shows, by way of example, means for admitting the respiratory gas comprising a valve which can be placed partly on the edge of the shell 16 of the mask and partly on the seal 10. This valve comprises a seat 30 , through which holes are placed, placed in the face cover, and a shutter lever 32 rotating on an axis 34 belonging to the shell. The seal is ensured by the seal 31. A spring 36 pushes the lever 32 towards the seat 30. The fixing block 28 belonging to the screen comprises a pallet 38 which, when the screen is in place, presses on the one of the ends of the lever 32 so as to raise the other end of the seat 30 and to open a communication with the interior of the screen. Other constitutions would obviously be possible.
Le bloc de fixation 28 est prévu pour autoriser une mise en place rapide sur la coquille 16 du masque. Les moyens de fixation peuvent avoir des constitutions très diverses et seuls quelques modes de réalisation seront donnés à titre d' exemple.The fixing block 28 is provided to allow rapid installation on the shell 16 of the mask. The fixing means can have very diverse constitutions and only a few embodiments will be given by way of example.
Dans le mode de réalisation montré en figures 3 et 4, le bloc de fixation appartenant à 1'écran comporte un coulisseau 40 à billes 42 repoussées par un ressort vers une position en saillie. Le coulisseau est prévu pour s'engager dans une glissière 44 solidaire de la coquille 16. Des logements 46 sont prévus dans la glissière pour recevoir les billes et verrouiller automatiquement le coulisseau 40. Deux poussoirs 48 sont placés de part et d'autre de la glissière pour repousser les billes et déverrouiller manuellement l'écran lorsqu'il est inutile et peut être enlevé. Dans une variante, la glissière est fixée à l'écran et le coulisseau à la coquille.In the embodiment shown in FIGS. 3 and 4, the fixing block belonging to the screen comprises a slide 40 with balls 42 pushed by a spring towards a projecting position. The slide is designed to engage in a slide 44 secured to the shell 16. Housing 46 is provided in the slide to receive the balls and automatically lock the slide 40. Two pushers 48 are placed on either side of the slide to push the balls and manually unlock the screen when not in use and can be removed. In a variant, the slide is fixed to the screen and the slide to the shell.
Dans la variante de réalisation montrée en figures 5 et 6, un barreau en fer doux 50 est incorporé au bloc de fixation 28. Ce barreau est prévu pour s'engager dans une glissière 52 solidaire de la coquille 16 et y être retenu par un champ électro-magnétique créé par des bobines 54 noyées dans la glissière, lorsque ces bobines sont alimentées. Des moyens tels qu'une palette 56, placée de façon à être actionnée par le barreau 50 en fin d'introduction de ce dernier, sont prévus pour alimenter les bobines. Le déver¬ rouillage peut être effectué par action manuelle sur un interrupteur, à l'aide d'un poussoir 58 similaire aux poussoirs 48 de la figure 4.In the alternative embodiment shown in FIGS. 5 and 6, a soft iron bar 50 is incorporated into the fixing block 28. This bar is designed to engage in a slide 52 integral with the shell 16 and to be retained there by a field electro-magnetic created by coils 54 embedded in the slide, when these coils are powered. Means such as a pallet 56, placed so as to be actuated by the bar 50 at the end of introduction of the latter, are provided for supplying the coils. The unlocking can be carried out by manual action on a switch, using a plunger 58 similar to the plungers 48 of FIG. 4.
Il est également possible de prévoir une retenue par des aimants, ayant une force d'attraction choisie de façon à retenir efficacement l'écran, tout en laissant la possibilité d'enlever le masque contre l'action des aimants en exerçant une force manuelle.It is also possible to provide a retention by magnets, having a force of attraction chosen so as to effectively retain the screen, while leaving the possibility of removing the mask against the action of the magnets by exerting a manual force.
Dans le mode de réalisation montré en figures 7 et 8, le masque est verrouillé manuellement après mise en place. Le bloc de fixation solidaire de l'écran comporte encore un coulisseau 60, destiné à s'engager dans une glissière 62 solidaire de la coquille 16. Deux verrous 64, commandés manuellement, permettent de verrouiller le coulisseau, lorsqu'il est entièrement engagé, en les rapprochant par action des doigts du porteur. Le déverrouillage peut alors être obtenu à l'aide d'un bouton 66, emprisonné dans le coulisseau 60, que l'enfoncement des verrous 64 repousse vers la position en saillie montrée sur la figure 7. L'utilisateur déverrouille l'écran en appuyant sur le bouton 66, qui agit sur des pans inclinés des verrous 64, les écarte l'un de l'autre et les chasse du coulisseau. Dans une variante de réalisation, les verrous 64 sont sollicités l'un vers l'autre par des ressorts.In the embodiment shown in Figures 7 and 8, the mask is manually locked after placement. The fixing block secured to the screen also comprises a slide 60, intended to engage in a slide 62 secured to the shell 16. Two latches 64, controlled manually, make it possible to lock the slide, when it is fully engaged, by bringing them closer by action to the wearer's fingers. Unlocking can then be obtained using a button 66, trapped in the slider 60, that the depression of the latches 64 pushes back towards the projecting position shown in FIG. 7. The user unlocks the screen by pressing the button 66, which acts on inclined sides of the locks 64, separates them from one another and drives them from the slide. In an alternative embodiment, the latches 64 are biased towards each other by springs.
Lorsque le masque régulateur (partie oronasale) est susceptible d'être alimenté en surpression, il est avantageux de prévoir un bloc de fixation qui augmente la pression d'application de l'écran sur le visage. La figure 9 montre des moyens qui peuvent être prévus pour atteindre ce résul¬ tat.When the regulating mask (oronasal part) is likely to be supplied with overpressure, it is advantageous to provide a fixing block which increases the pressure for applying the screen to the face. FIG. 9 shows means which can be provided to achieve this result.
Le bloc de fixation comporte, dans le cas illustré en figure 9, un guide 68 destiné à s'engager dans un socle 70 qui peut être d'une seule pièce avec la glissière appartenant aux moyens de fixation du masque. Sur ce guide est articulé l'arrière d'un levier 72. Un ressort 74 est interposé entre l'autre extrémité du levier et le guide 68.The fixing block comprises, in the case illustrated in FIG. 9, a guide 68 intended to engage in a base 70 which can be in one piece with the slide belonging to the means for fixing the mask. On this guide is articulated the rear of a lever 72. A spring 74 is interposed between the other end of the lever and the guide 68.
En général, l'écran sera démuni de harnais propre et le bloc de fixation 28 sera prévu de façon à appliquer le joint d'étanchéité 26 avec une force suffisante, en dépit du montage de l'écran en porte-à-faux par rapport au masque. Cependant, il est possible de prévoir une sangle en tissu sur le harnais. Cette sangle est alors détendue ou ouverte en dehors des périodes d'utilisation pour ne pas gêner la mise en place de l'écran.In general, the screen will be devoid of a clean harness and the fixing block 28 will be provided so as to apply the seal 26 with sufficient force, despite the mounting of the screen in cantilever with respect to in the mask. However, it is possible to provide a fabric strap on the harness. This strap is then relaxed or open outside the periods of use so as not to hinder the positioning of the screen.
Dans un avion, l'équipement est généralement stocké dans une boîte à portée du pilote. En dehors des périodes d'utili¬ sation, le masque sera stocké avec l'écran verrouillé sur lui, afin qu'en cas d'urgence le pilote puisse placer l'ensemble masque-écran sur le visage, disposer d'oxygène respiratoire dans des lieux prévus par les règlements en vigueur et être protégé contre les fumées. Si les circons¬ tances n'exigent pas alors le port de l'écran, le pilote peut l'enlever. Pour éviter un oubli, la boîte de stockage est avantageusement prévue de façon que le masque ne puisse y être rangé de nouveau que lorsque l'écran est fixé sur lui. In an airplane, the equipment is generally stored in a box within the pilot's reach. Outside the periods of use, the mask will be stored with the screen locked on it, so that in an emergency the pilot can place the mask-screen assembly on the face, have breathing oxygen in places provided for by the regulations in force and be protected against smoke. If the circumstances do not then require the wearing of the screen, the pilot can remove it. To avoid forgetting, the storage box is advantageously provided so that the mask cannot be stored there again until the screen is fixed on it.

Claims

REVENDICATIONS
1. Equipement de protection de tête comprenant un masque respiratoire muni d'un harnais et raccordable à une source de gaz. respirable et comprenant un écran (22) de protection des yeux contre les fumées, muni d'un joint d'étanchéité périphérique (26) d'appui sur le visage et sur le masque, distincts l'un de l'autre, caractérisé en ce qu'il comporte des moyens de verrouil- lage de l'écran sur le masque, désarmables manuellement, et prenant appui sur le masque pour appliquer le joint sur le visage.1. Head protection equipment including a breathing mask fitted with a harness and connectable to a gas source. breathable and comprising a screen (22) for protecting the eyes against smoke, provided with a peripheral seal (26) bearing on the face and on the mask, distinct from each other, characterized in which it comprises means for locking the screen on the mask, which can be disarmed manually, and bearing on the mask in order to apply the seal to the face.
2. Equipement selon la revendication 1, caractérisé en ce que ledit écran (22) comprend des moyens (38) ouvrant une communication entre 1 ' intérieur du masque et 1 ' intérieur de l'écran lors du verrouillage.2. Equipment according to claim 1, characterized in that said screen (22) comprises means (38) opening a communication between one interior of the mask and one interior of the screen during locking.
3. Equipement selon la revendication 2, caractérisé en ce que les dits moyens comprennent au moins un siège (30) de soupape placé sur le masque, à un emplacement tel qu'il débouche à l'intérieur de l'écran, et des moyens (38) d'ouverture forcée de la soupape lors de la mise en place de 1 ' écran.3. Equipment according to claim 2, characterized in that said means comprise at least one valve seat (30) placed on the mask, at a location such that it opens out inside the screen, and means (38) forced opening of the valve when the screen is put in place.
4. Equipement selon la revendication 1, caractérisé en ce que l'écran et le masque portent des moyens (68, 74) pour augmenter la pression mécanique d'application du joint sur le visage lors du verrouillage de l'écran.4. Equipment according to claim 1, characterized in that the screen and the mask carry means (68, 74) for increasing the mechanical pressure of application of the seal on the face when the screen is locked.
5. Equipement selon la revendication 4, caractérisé en ce que l'écran est démuni de harnais propre.5. Equipment according to claim 4, characterized in that the screen is devoid of clean harness.
6. Equipement selon la revendication 1, caractérisé en ce que les moyens de verrouillage comprennent un coulisseau6. Equipment according to claim 1, characterized in that the locking means comprise a slide
(40, 60) fixé à l'écran ou à une coquille rigide du masque et une glissière (44, 62) fixée à la coquille.(40, 60) fixed to the screen or to a rigid shell of the mask and a slide (44, 62) fixed to the shell.
7. Equipement selon la revendication 6, caractérisé en ce que les moyens de verrouillage comportent, de plus, des billes (42) placées dans le coulisseau, repoussées vers une position en saillie latérale d'engagement dans des logements de la glissière (44) et des poussoirs (48) portés par la glissière et permettant de refouler les billes hors des logements.7. Equipment according to claim 6, characterized in that the locking means further comprise balls (42) placed in the slide, pushed towards a lateral projecting position of engagement in housings of the slide (44) and pushers (48) carried by the slide and allowing the balls to be forced out of the housings.
8. Equipement selon la revendication 6, caractérisé en ce que les moyens de verrouillage comportent des verrous (64) portés par la glissière (62), deplaçables manuellement vers une position d'engagement dans le coulisseau (60) .8. Equipment according to claim 6, characterized in that the locking means comprise latches (64) carried by the slide (62), manually displaceable towards an engagement position in the slide (60).
9. Equipement selon la revendication 6, caractérisé en ce que les moyens de verrouillage comportent des moyens magnétiques ou électro-magnétiques (50, 54) portés par l'écran et le masque.9. Equipment according to claim 6, characterized in that the locking means comprise magnetic or electromagnetic means (50, 54) carried by the screen and the mask.
10. Equipement selon la revendication 1, caractérisé en ce que ledit harnais est prévu pour libérer, entre sa partie proche du raccordement au masque et le visage, un jeu d'insertion de la partie inférieure du joint (26) . 10. Equipment according to claim 1, characterized in that said harness is provided to release, between its part close to the connection to the mask and the face, a set of insertion of the lower part of the seal (26).
EP95908985A 1994-02-02 1995-02-02 Protective headgear with respiratory mask and eye shield Expired - Lifetime EP0691871B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9401159 1994-02-02
FR9401159A FR2715572B1 (en) 1994-02-02 1994-02-02 Head protection equipment with respiratory mask and optical screen.
PCT/FR1995/000134 WO1995020995A1 (en) 1994-02-02 1995-02-02 Head protection device with respirator mask and optical shield

Publications (2)

Publication Number Publication Date
EP0691871A1 true EP0691871A1 (en) 1996-01-17
EP0691871B1 EP0691871B1 (en) 1999-04-21

Family

ID=9459683

Family Applications (1)

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EP95908985A Expired - Lifetime EP0691871B1 (en) 1994-02-02 1995-02-02 Protective headgear with respiratory mask and eye shield

Country Status (10)

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US (1) US5630412A (en)
EP (1) EP0691871B1 (en)
AU (1) AU1711195A (en)
CA (1) CA2159617C (en)
DE (1) DE69509171T2 (en)
ES (1) ES2131307T3 (en)
FR (1) FR2715572B1 (en)
HK (1) HK1010347A1 (en)
SG (1) SG49312A1 (en)
WO (1) WO1995020995A1 (en)

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Also Published As

Publication number Publication date
DE69509171T2 (en) 1999-11-18
ES2131307T3 (en) 1999-07-16
SG49312A1 (en) 1998-05-18
US5630412A (en) 1997-05-20
WO1995020995A1 (en) 1995-08-10
HK1010347A1 (en) 1999-06-17
DE69509171D1 (en) 1999-05-27
FR2715572A1 (en) 1995-08-04
CA2159617C (en) 2004-05-11
CA2159617A1 (en) 1995-08-10
FR2715572B1 (en) 1996-04-26
EP0691871B1 (en) 1999-04-21
AU1711195A (en) 1995-08-21

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