WO2007028877A2

WO2007028877A2 - Portable gas dispensing device

Info

Publication number: WO2007028877A2
Application number: PCT/FR2006/002015
Authority: WO
Inventors: Philippe Perez
Original assignee: Philippe Perez
Priority date: 2005-09-09
Filing date: 2006-09-01
Publication date: 2007-03-15
Also published as: FR2890568A1; WO2007028877B1; WO2007028877A3

Abstract

The invention concerns a portable gas dispensing device. The invention is characterized in that it comprises a contact free gas dispenser including a head-clamp (137), a conduit (132, 135) provided with a telescopic arm (139), and an adjustable nozzle (131) rotatably mounted at one end of said telescopic arm, said nozzle including at least one first orifice to expel one or more gasses in a first direction, at the opening, and at least a second orifice to expel one or more gasses in a second direction, at the nose, said gas dispenser being connected via at least one pipe (71) to a positive pressure appliance.

Description

PORTABLE DEVICE FOR DISPENSING GAS

The present invention relates to an adjustable portable device for dispensing at least one compressed or pressurized gas at the level of the nasal and oral cavities. The device includes a non-contact airway gas distributor connected by at least one hose to positive pressure turbine, compression, or compressed air equipment. The patent documents referred to below constitute the prior art of the invention: US 6247470, US 5104430, US 3683907, WO 99/13929 and WO 94/02190.

Respiratory systems of the prior art are traditionally concave masks that are applied to the face so as to hermetically cover the airways or helmets covering more or less the head of the user. These systems are mainly used for medical or industrial purposes. Other fields such as aeronautics or sports use identical systems. There are also other known oxygen or filtered air delivery devices in the vicinity of the airways for various uses having various types of tips for managing the gas outlet around the nose, mouth or both. . It is in this area of gas distribution and not total filtration that 1 'invention comes into play.

The disadvantages of half masks, masks or helmets are as follows:

- They are uncomfortable in that they generate constant pressure on the skin and facial muscles. - They create an extra thickness on the top of the nose and hinder the visibility of the user.

- They are responsible for condensation in the hollow of the concave part which may, depending on the conditions of use and in contact with the skin, generate irritation. - They do not allow to blow their noses or to spit freely, as for example during physical activities, without removing the device. - They do not allow to communicate clearly orally without the help of an ancillary system, such as the intercom type system.

They are of sufficient weight to cause skin irritation during repeated movements of the head.

Helmets generally separate the head from the outside environment and are heavy.

The respiratory management commands are constituted either by pressure sensor systems housed in the mask or in the air filtration / distribution box, so that the masks and helmets automatically require a pressurized breathing medium. that is to say a hermetic device, closed, or by a computer taking into account several parameters such as heart rate and respiratory rate.

- Lastly, masks such as surgeon masks or DIY masks can only be used in the field for which they were manufactured, they are not a suitable protection against organic pollution for example. With regard to contactless gas distributors, the problems observed are as follows:

- The systems in general are for the most part very little adjustable and therefore do not adapt precisely to each physiognomy. - They do not incorporate all the ergonomic parameters necessary for a comfortable use and the most sophisticated ones are heavy and bulky.

- They do not have separate exits.

- Outputs do not separately target the position of the nasal and oral cavities.

In view of the above, a problem to be solved by the invention is to provide an adjustable portable device for dispensing at least one pressurized compressed or filtered gas at the nasal and oral cavities accurately.

The solution of the invention to this problem posed first object a portable device for gas distribution, characterized in that it comprises a contactless gas distributor comprising a headband, a conduit provided with a telescopic arm, and an adjustable tip rotatably mounted at one end of said telescopic arm, said nozzle comprising at least a first port for expelling one or more gases in a first direction at the mouth and at least a second port for expelling one or more gases in a second direction, at the nose, said gas distributor being connected by at least one pipe to a positive pressure apparatus.

The second object is the use of such a portable gas distribution device as protection of the respiratory system against pollutants.

When a non-contact gas distributor comprises a rotatable two-out rotatable adjustable nozzle, it allows a homogeneous distribution of gas at the nasal and oral cavities of a user. In addition, when said dispenser is equipped with adjustment systems, such as including a double-headband headband or a telescopic arm, it adapts precisely to each physiognomy and thus allows a comfortable use which other devices currently on the market do not have. The invention will be better understood on reading the nonlimiting description which follows, written with reference to the appended drawings, in which:

- Figure 1 shows the contactless gas distributor according to a first embodiment of the invention; FIG. 2 is an exploded view of the tip of the non-contact gas distributor according to a first embodiment of the invention;

FIG. 3 illustrates the operation of the tip of the non-contact gas dispenser at the moment of inspiration according to a first embodiment of the invention;

FIG. 4 illustrates the operation of the tip of the non-contact gas distributor at the time of expiration according to a first embodiment of the invention;

FIGS. 5A and 5B show, in section, two other tips of the non-contact gas distributor according to a first embodiment of the invention: the propeller system and the detail of the propeller, the contactors and the spring, and the vacuum sensor system; - Figure 6 shows, in section, the shutter system closing the cylinders of the nozzle of the non-contact gas distributor according to a first embodiment of the invention;

FIG. 7 is a view of the complete portable device according to a first embodiment of the invention which illustrates the various adjustment possibilities of said device;

- Figure 8 shows, in section, the air / electricity plug according to a first embodiment of the invention;

FIGS. 9A and 9B illustrate the two possible uses of the hanging system of the positive pressure apparatus; FIG. 10 represents the hanging system of the positive pressure apparatus;

- Figure 11 shows the electrical diagram of the system according to a first embodiment of the invention;

FIG. 12 represents the electrical diagram of the transmitter / receiver system according to a first embodiment of the invention;

FIG. 13 represents a second embodiment of the non-contact gas distributor;

FIG. 14 is a side view of the non-contact gas distributor according to a second embodiment of the invention as well as the various adjustment possibilities of said distributor; FIG. 15 is a view from above of the non-contact gas distributor according to a second embodiment of the invention as well as the various adjustment possibilities of said dispenser; and

- Figure 16 illustrates, in section, the operation of the gas outlet device at the time of inspiration according to a second embodiment of the invention.

The portable gas delivery device according to the invention comprises a positive pressure apparatus connected by at least one pipe to a gas distributor. The positive pressure apparatus is intended to distribute one or more gases under pressure to the pipe of the portable device according to the invention.

Among the positive pressure devices that can be adapted to the portable device according to the invention, pressure filtration systems will advantageously be chosen. positive, electrovaπαe / compressed gas cylinder systems or compressor compressor systems.

Positive pressure apparatus according to the invention having the particularity of providing a gas supply are advantageously more compact than the systems proposed to date.

As non-limiting examples of gas that can be distributed by the positive pressure apparatus according to the invention, mention may be made of dinitrogen, dioxygen, argon, carbon dioxide, neon, helium, nitric oxide, krypton, methane, dihydrogen, nitrous oxide, xenon, nitrogen dioxide, ozone or radon, alone or in mixtures.

Preferably, the gas delivered by the positive pressure apparatus is a mixture comprising at least 60 to 85% nitrogen and 15 to 40% dioxygen. More preferably still, the gas delivered by the positive pressure apparatus is filtered air.

According to the invention, the filtering apparatus has a length of less than 40 cm, a width of less than 30 cm and a height of less than 20 cm. Preferably, the filtering apparatus has a length of less than 15 cm, a width of less than 12 cm and a height of less than 15 cm. More preferably still, the filter apparatus has a length of about 9 cm, a width of about 7 cm and a height of about 9 cm.

The positive pressure apparatus is preferentially worn on the back of the user. To be stabilized on the back, the positive pressure apparatus can be fitted on a semi-rigid support maintained by adjustable straps having the distinction of being used in belt mode or backpack mode.

In addition, the positive pressure apparatus of the device according to the invention is connected by at least one pipe to the gas distributor located at the head of the user. It is through this pipe that the gas or pressurized gas that will feed the gas distributor and thus allow the user to breathe. As a non-limiting example of a pipe that can be adapted to the device according to the invention, mention may be made of smooth, spiral or convoluted pipes.

Advantageously, the pipe is convoluted and can be wound in the positive pressure apparatus containing a compartment provided for this purpose. In addition, the pipe can be fixed by a hook to the user's suit. Fixing the pipe with a hook makes it possible to reduce the weight constraint of the pipe and the amplitude of its oscillation when the user is in motion. The gas distributor according to the invention comprises at least one headband connected to the pipe described above, a conduit and an adjustable endpiece rotatably mounted. The dimensions of the gas distributor according to the invention allow it to adapt to different sizes of skull. Preferably, the gas dispenser adapts to skull sizes ranging from a child's skull to that of an adult.

The gas dispenser headband according to the invention consists of at least one hoop that is adapted to the head of a user and used to maintain the stable gas distributor. By way of non-limiting example of headband capable of being adapted to the gas distributor according to the invention, mention may be made of the double-headed headband, the adjustable headband, the foldable headband, the greenhouse - flexible heads, monaural headbands, biaural headbands, headband headbands and headbands with temporal support. The various characteristics mentioned above can be found alone or in combination on the headband according to the invention.

Preferably, the gas dispenser headband according to the invention is an adjustable headband with temporal support; connected to the pipe described above.

In addition, the pipe fits preferentially on the headband by means of a bend. This elbow is rounded so as not to slow the flow of the gas or gases and it is positioned between the two ends of the headband, preferably equidistant from the two ends of the headband. Indeed, this position corresponds to the position of the skull which generates the least movement stroke with respect to a point positioned on the vertical plane passing through the vertical column of the user. The conduit of the gas distributor according to the invention consists of a first arcuate portion following the headband, said first portion having one end at the pipe and the other end at the temporal portion of the headband. This first part of the duct engages in a second part slightly curved, following the contours of the user's skull and passing over his ear to descend down the jaws of the user. This second portion of the duct engages in a third telescopic portion that allows a suitable and accurate adjustment of the depth of the rotary mounted adjustable tip. The rotary mounted adjustable nozzle of the gas distributor according to the invention consists of at least one cylinder closed at its end and open on one side. This tip, connected to a rotating part allows to precisely adjust the output of the gas or gases at the nose and mouth.

The tip according to the invention is positioned near the mouth and the nose so that the directions of the gas or gases expelled at the orifices form between them an angle less than 120 °.

Advantageously, the tip of the device according to the invention is easily detachable and washable.

The invention also relates to the use of the portable gas distribution device according to the invention as protection of the respiratory system against pollutants.

By way of non-limiting example, the portable gas distribution device is particularly intended for sportsmen, city pedestrians, and workers exposed to pollutants.

By pollutants is meant according to the invention the primary air pollutants, secondary and suspended particles in the air. By way of nonlimiting example of primary pollutants, mention may in particular be made of carbon oxides, sulfur oxides, nitrogen oxides, light hydrocarbons and volatile organic compounds.

By way of nonlimiting example of secondary pollutants, there may be mentioned in particular ozone, photochemical pollutants or any other chemical transformation of two primary pollutants in the presence of ultraviolet radiation and / or a high temperature. As a nonlimiting example of particles suspended in the air, mention may be made of dust, dirt, salt spray, pollen and spores.

In addition, the portable gas dispensing device can also be used for other medical, industrial or other purposes depending on the filtration or compressed air system or other suitable, used.

As is more particularly shown in Figures 1 to 12, the portable gas distribution device according to a first embodiment of the invention comprises a positive pressure filtration system 74 of reduced size compared to existing systems. This system is connected to a pipe 73 bringing filtered air to the head. This pipe is composed of two parts: a first flexible part 73, is more or less wound, without crashing, into the positive pressure filtration system 74 according to the length that separates it from a hook 72, and a second part 71 extends from the hook to the headband 7. This last portion of the pipe 71, more flexible than the first portion 73, bends more readily to follow without restraint head movements. The hook 74 makes it possible to fix the pipe 73 and 71 on the wearer's clothing in order to reduce the weight constraint of the pipe and the amplitude of its oscillation when the user is moving. The second part of the pipe 71 fits on a headband 7 adjustable through a bend 6.

The headband 7 is also foldable: the opposite half to the conduit 5 and 2 pivots around the clamping axis of the elbow 6 and the adjustment system of the headband. This half comes to flatten against the other half. The two halves thus contiguous then pivot around the axis of the clamping wheel 3 to come close to the duct 5 and 2 thus forming a compact piece.

The elbow 6 has at the inlet a detachable convoluted flexible tube 11, which dampens the movement of said pipe 71 when the user moves the head up and down and thus attenuates the shocks transmitted to the gas distributor. This elbow 6 has a rounded shape as possible to not slow down the air flow. It is fixed on the axis of the adjustment wheel of the headband 7, allowing it to pivot in order to counterbalance the oscillating movements of the pipe 71 when the user turns the head. This same bend 6 is positioned equidistant from the two ends of the headband 7.

A duct 5, 2 and 9 connects the elbow 6 to the tip 1 of the non-contact gas distributor. This duct is composed of three parts: a first part 5 connecting the elbow 6 to a second part 2 flatter but of greater or equal section surface through a plug 81. The first part of the duct 5 is flexible and comprises a convOluted portion at each end: at the beginning to allow the elbow 6 to pivot and at the end to avoid pinching and facilitate the positioning of the headband 7 relative to the second portion of the conduit 2. The general flexibility of the conduit allows it also to bend when the rotational constraints of the elbow 6 and the headband 7 are maximum. The plug 81 engages on the second part of the conduit 2 allowing a connection / disconnection safe and fast of the two elements when the user wants to fold the gas distributor to store it. This plug 81 has the particularity of being hollow and containing electrical contacts in its wall, allowing the air to circulate but also the current to pass.

This second part of the duct 2 passes over the ear of the user not to harm his hearing and leads the air at the nose and mouth. Said second portion of the duct 2 is slightly curved to follow the contours of the user's skull without touching it.

The third portion of the duct 9 is a telescopic arm allowing an appropriate and precise adjustment of the depth of the nozzle 1 of the gas distributor according to the invention.

The end of this third portion 9 contains a convoluted portion 8 and position memory for a rotational adjustment of the nozzle 1 of the gas distributor.

Two son drivers form an integral part of the device and form the circuit connecting the switch 24 housed in the nozzle 1 and the motor control of the positive pressure filtration system 74. The son son 13 are integrated in the walls of the pipe 71 and 73 and duct 5, 2 and 9 so that they remain as flexible as possible. A knob potentiometer 12 is housed at the end of the second portion of the conduit to allow the user to adjust the speed of the engine of the system. positive pressure filtration 74 and thus the air flow conveniently and quickly.

An atrium system 4 is attached to the clamping wheel 3 which holds the headband 7 at the first part of the conduit 5. This atrium 4 also helps maintain the gas distributor.

The earhook holding hole is a rail of a defined length to adjust its forward / backward position. This solution adjusts the headset according to the size of the ear of each individual. Each of the headband elements 7, leads 5, 2 and 9 and atrium 4 is free to pivot on the axis of the wheel 3 when it is loosened, thus providing a precise adjustment taking into account the sizes and shapes of the skull. each user. The headband 7 can therefore be placed above the skull for conventional use but also in the back if you want to wear a bicycle helmet for example or any headgear. The duct 5, 2 and 9 and thus the gas distributor, can thus be adjusted ergonomically and accurately. The opposite end of the threaded axis of the wheel 3 comprises a ball joint. On this ball as well as on the branch of the headband 7 opposite the wheel 3, engage pivoting elements 10, covered with a flexible surface, which are pressed against the temples of the user. These pivoting elements 10 make it possible at the same time to mitigate the effects of unpleasant pressure of the headband 7 and to reinforce the maintenance of the gas distributor.

The tip 1 of the gas distributor consists of a conduit "Y" 25 which is connected to two cylinders 21 and 22 closed on their opposite ends and open on the side. The two cylinders 21 and 22 are held in position by the "Y" duct 25 and the part 26. Each cylinder 21 or 22 pivots independently and a small lug makes it possible to precisely adjust the air outlet at the nose and the mouth. A shutter damper system 28 and 29 which slide around the cylinders 21 and 22 allows local adjustment of the desired amount of air on each cylinder. This system makes it possible to direct a quantity of air set at the source to a cylinder or another, fairly or not. Each shutter flap contains a lug for ease of adjustment.

The nozzle of the gas distributor is positioned near the mouth and the nose thanks to the various adjustment systems mentioned above, so that the space between the two cylinders 21 and 22 is more or less in front of the mouth.

At the rear of these two cylinders 21 and 22, fixed between the "Y" duct 25 and the piece 26 holding said cylinders 21 and 22, there is a main switch 24 free to pivot on its axis. A flap 23 is fitted on the outer part of the main contactor 24, while the flattened portion of the contactor is in an annex compartment of the "Y" duct 25. The armature 30 protects the flap 23.

When the user inspires, the flap 23 is in a vertical position and is not subject to any constraint. The main contactor 24 is then pressed against the contactors 32 by means of a spring 31. The main contactor 24 then connects the positive terminal and the negative terminal of the electrical circuit, the current flows, the air circulates and leaves the cylinders 21 and 22. When the user expires, the air propelled by the mouth and nose rushes between the two cylinders 21 and 22. These, create a venturi effect by the shape of their section which exerts a push on the shutter 23. This rotates the main contactor 24 which compresses the spring 31 and disengages the contactors 32. The electrical circuit is open, the current no longer passes, the air is no longer circulating.

As soon as the air pressure is reduced, the shutter 23 and the main contactor 24 resume their original positions repulsed by the spring 31. This spring 31 is adjustable from the outside. It is mounted on a rail, allowing it to change the distance between it and the main switch 24 and thus adjust the force feedback it exerts on it.

In addition, the adjustment of the spring 31 makes it possible to adjust the moment of return of air at the outlet of the cylinders 21 and 22 to compensate for the loss of pressure when the air has stopped circulating. To do this, the engine in the case of a filtration system, must restart before the user inspires. This must start the turbine so that it gets its optimal rotation speed at the moment the user inspires. This delay Respiratory varies depending on the activity of the user and therefore his heart rate. As breathing increases, the speed of exhalation accelerates, causing faster expulsion of air. The thrust force of the air increases since it is proportional to the flow which tends to increase. In addition, the air flow at the outlet of the gas distributor is proportional to the air pressure throughout the air circulation system. The volume of this system must be taken into account (the larger it is, the more time it takes for the turbine to rebalance this pressure).

The main contactor 24, the spring 31 and the contactors 32 are in a sealed compartment to prevent any false contact and fouling due to moisture and particles released by the respiratory tract. The plug 81 also makes it possible to connect a pipe 82 to the second portion of the pipe 2. The pipe 82 contains the conductive wires 83 inside its wall. These terminate in two lugs 84 on the outside of the pipe. When the pipe 82 is fitted on the plug 81, these pods fit in turn in female pods. These are connected to contactors 85 by means of wires 86. These contactors, once the plug is inserted, are positioned at the contactors of the second part of the conduit 2 thus allowing the passage of the current of the pipe to the second part. of the duct 2. The seal 87 allows the sealing of the air circuit. The potentiometer and its adjustment wheel 12 are positioned on the second portion of the duct 2 in order to adjust the amount of air at the outlet of the device.

The positive pressure filtration system 74 is held on the user by a hooked belt. This hooked belt is composed of a semi-rigid plate 92, straps 91 adjustable through loops 103 and which attach with the hooks 104. The filtration system is housed in the footprint 102 and clings in. port 101. This has the particularity of allowing the filtration system to rotate 90 ° while remaining hooked.

In backpack position, the straps 91 pivot and move apart so as to allow the user to wear the filtration system on the back. The length adjustment of the pipe 73 is thanks to the winding system contained in the filtration system.

The electrical system contained in the complete device 111 controls here the positive pressure filtration system A. According to a first variant of the first embodiment of the invention, the complete device can control a solenoid valve / compressed air cylinder system. B. According to this variant, a flap contactor system is connected to a solenoid valve controlling the opening or closing of the air duct. According to a second variant of the first embodiment of the invention, the dispenser may be used with a filter compressor system C, the hose being able to serve as a compression chamber and the solenoid valve being placed at the rear of the conduit 5, 2 and 9. According to a third variant of the first embodiment of the invention, the device 111 contains a transmitter 113 powered by a battery 112. This emitter placed in the gas distributor sends by frequency the opening and closing signals of the distributor circuit actuated by the main contactor 24 to a receiver 114. This in turn controls the operation of the filtration system A, or according to the variant mentioned above, the solenoid valve / compressed air cylinder system B or the above-mentioned variant, the filter compressor system C. Thus, the alternating operation of the air circulation can be done remotely.

According to a fourth variant of the first embodiment of the invention, the nozzle 1 contains a funnel-shaped air collector 51. Upon expiration of the user, under the effect of the air accelerated by the venturi effect of the two cylinders 21 and 22 and also reinforced by the shape of the duct 51, a propeller 52 rotates and constrains a spring 54. The conductive portion 53 of the propeller is separated from the electrical contactors 55, cutting the current and therefore the arrival of air. When the air force decreases, the spring 54 pushes the propeller against the contactors. Adjustment of the return stress is obtained by means of the adjustable spring, by means of counter-nut / knob 59.

According to a fifth variant of the first embodiment of the invention, the tip 1 contains a bar 56 in the form of a half-cylinder containing a vacuum sensor 57. of the user, under the effect of the air accelerated by the venturi effect of the cylinders 21 and 22, a depression is created at 58. The vacuum sensor 57 controls the cut-off of the general electrical circuit. The air stops flowing. According to a sixth variant of the first embodiment of the invention, a spacer having a portion of its outer surface in the form of a neck, containing a flexible material can be interposed between the atrium and the main conduit on the wheel, in order to create enough space to slip a branch of a pair of glasses that can rest on the same spacer.

According to a seventh variant of the first embodiment of the invention, the force return spring of the main contactor can be set automatically by an auxiliary device, containing on one side a heart rate sensor, a calculator and a issuer; and on the other, a receiver controlling the position of said spring.

According to an eighth variant of the first embodiment of the invention, a not shown air deflector system can fit on the frame 30 in order to avoid a counter-thrust of the outside air when using the the equipment in high wind or high speed on the flap 23, while allowing the air expelled by the user to go out freely.

According to a second embodiment of the invention, the portable gas distribution device comprises a positive pressure filtration system 74 of reduced size compared to existing systems. This system is connected to a pipe 73 bringing filtered air to the head. This pipe is composed of two parts: a first flexible part 73 connected to the positive pressure filtration system 74 and a second part 71 connected to a headband 137. This last part of the pipe 71, more flexible than the first, bends more willingly to follow without restraint, head movements. A hook 74 secures the pipe 73 and 71 to the user's suit to reduce the weight constraint of the pipe and the magnitude of its oscillation when the user is in motion. The second portion of the pipe 71 fits on a headband 137 adjustable through a bend 136. Advantageously, the headband 137 of the gas distributor according to the invention is a double-hoop headband, adjustable locking snap-fastener 134 and with temporal support 140, connected to the pipe 71 described above. The adjustable double headband of the headband 137 assists in the general maintenance of the gas distributor and makes it possible to adapt the gas distributor to different sizes and skull shapes of each user. In addition, the flexibility offered by the double-hoop headband 137, allows to place the headband 137 above the skull for conventional use but also in the back if you want to wear a bicycle helmet for example or any head cover.

In addition, each arch of the headband 137 is free to rotate along the skull of the user along an axis 142. The elbow 136 has a rounded shape as possible to not slow down the flow of air. It is fixed in the middle of a hoop 137 of the headband on a rotating part 141 allowing it to pivot in order to counterbalance the oscillating movements of the pipe 71 when the user turns the head. A duct 135, 132 and 139 connects the elbow 136 to the tip of the non-contact gas distributor 131. This duct is composed of three parts: a first portion 135 connecting the elbow 136 to a second portion 132 flatter but surface of superior or equal section. The general flexibility of the conduit also allows it to bend when the rotational constraints of the elbow 136 and the headband 137 are maximum.

The second part of the duct 132 passes over the ear of the user to not impair its hearing and leads the air at the nose and mouth. Said second portion of the duct 132 is slightly curved to follow the contours of the user's skull without touching it.

The third portion of this duct 139 is telescopic in order to allow an appropriate and precise adjustment of the depth of the nozzle 131 of the gas distributor according to the invention. The distal end of this third part 139 is connected to a rotating part 138. This rotating part 138 is advantageously secured to the end piece 131. Also, the rotation of the rotary part 138 makes it possible to orient the end piece 131 adequately. . Ultimately, the rotating portion 138 allows adjustment in rotation of the nozzle 131 of the gas distributor. Said rotary part 138 and the end piece 131 may be made of a single piece or form two separate pieces.

In addition, a knob 133 makes it possible to adjust the height of the tip independently of the adjustment of the headband 137. Thus, the duct 135, 132 and 139 and the headband 137 pivot about two distinct axes 133 and 142.

The opposite end of the threaded axis of the wheel 133 comprises a ball joint. On this ball engages a pivoting element 140, covered with a flexible surface, which is pressed against the temple of the user. This pivoting element 140 makes it possible at the same time to attenuate the effects of unpleasant pressure of the headband 137 and to reinforce the maintenance of the gas distributor.

The tip 131 of the gas distributor consists of a single cylinder closed at its end and open on one side. This single cylinder has two oblong type orifices 151 and 152. This tip 131 is connected to the rotating portion 138 which allows to precisely adjust the air outlet at the nose and mouth. The nozzle 131 of the gas distributor is positioned near the mouth and the nose thanks to the various adjustment systems mentioned above, so that the directions of the air expelled at the oblong orifices 151 and 152 form between them an angle α less than 120 °. The positive pressure filtration system 74 is held on the user by a hooked belt. This hooked belt is composed of a semi-rigid plate 92, straps 91 adjustable through loops 103 and which attach with the hooks 104. The filtration system is housed in the footprint 102 and clings in. port 101. This has the particularity of allowing the filtration system to rotate 90 ° while remaining hooked.

In backpack position, the straps 91 pivot and move apart so as to allow the user to wear the filtration system on the back. The adjustment of the length of pipe 73 is done through the winding system contained in the filtration system.

According to a first variant of the second embodiment of the invention, a wheel potentiometer is housed in the wheel 133 located at the end of the second portion of the conduit 132, to allow the user to adjust the engine speed and therefore the air flow conveniently and quickly.

According to a second variant of the second embodiment of the invention, electrical wires located in the pipe 71 and 73 make it possible to heat the air inhaled by the user, when the latter uses the device according to the invention at low temperatures. .

According to a third variant of the second embodiment of the invention, the pipe 71 and 73, the bend 136 and the first portion of the duct 135 form a convoluted single pipe connecting the positive pressure apparatus 74 to the duct 132.

According to a fourth variant of the second embodiment, maintaining the pipe to the headband is made possible by a clipping system.

According to a last variant of the second embodiment of the invention, the hook 72 is replaced by a fastening system integrated into the wear of the user. Advantageously, said attachment system is a neck consisting of a double layer of textile sewn on the coat.

Claims

REVE.OICΑTIONS

1. Portable device for gas distribution, characterized in that it comprises a contactless gas distributor comprising a headband (7, 137), a conduit (5, 135, 2, 132) provided with a telescopic arm (9, 139), and a rotatably mounted adjustable tip (1, 131) at one end of said telescopic arm, said tip including at least a first port for expelling one or more gases in a first direction, at the mouth, and at least one second orifice for expelling one or more gases in a second direction, at the nose, said gas distributor being connected by at least one pipe (73, 71) to a positive pressure apparatus (74).

2. Device according to claim 1, characterized in that the first and the second direction are two different directions which form an angle less than 120 °.

3. Device according to one of claims 1 or 2, characterized in that the conduit (5, 135, 2, 132, 9, 139) forms both a structure for holding the tip (1, 131) and a channel allowing the circulation of the gas or gases.

4. Device according to one of claims 1, 2 or 3, characterized in that the positive pressure apparatus (74) is a positive pressure filtration system turbine or compression.

5. Device according to one of claims 1, 2 or 3, characterized in that the positive pressure apparatus (74) is a bottle system containing at least one compressed gas.

6. Device according to one of claims 1, 2 or 3, characterized in that the positive pressure apparatus (74) is a filter compressor.

7. Device according to one of the preceding claims, characterized in that the gas dispensed is selected from nitrogen, oxygen, argon, carbon dioxide, neon, helium, nitric oxide, krypton, methane, dihydrogen, nitrous oxide, xenon, nitrogen dioxide, ozone or radon, alone or in mixtures.

8. Device according to claim 6, characterized in that the distributed gas is a mixture comprising at least dinitrogen at a concentration between 60 and 85% and dioxygen at a concentration between 15 and 40%.

9. Device according to claims 6 and 7, characterized in that the dispensed gas is filtered air.

10. Device according to one of the preceding claims, characterized in that the end of the telescopic arm (139) is connected to a rotary portion (138) for a rotational adjustment of the nozzle (131) of the gas distributor.

11. Device according to claim 10, characterized in that the rotating part (138) and the end piece (131) consist of a single piece.

12. Device according to claim 10, characterized in that the rotary part (138) and the end piece (131) form two separate parts.

13. Device according to one of the preceding claims, characterized in that the orifices of the nozzle (1, 131) are oblong orifices.

14. Device according to one of the preceding claims, characterized in that the pipe consists of a plurality of flexible pipes (71) and (73) fixed by a hook (72) to the habit of the user.

15. Device according to one of the preceding claims, characterized in that the adjustment of the depth of the tip (1, 131) is made possible by a telescopic arm (9, 139).

16. Device according to one of the preceding claims, characterized in that the adjustment of the height of the tip (1, 131) is made possible by a wheel (133).

17. Device according to one of the preceding claims, characterized in that the positive pressure apparatus (74) is coupled to an electrical circuit connected to a main contactor (24), said main contactor for activating the distribution of or gas when inhaling and stopping it when the user expires.

18. Device according to one of the preceding claims, characterized in that the electric circuit (13) contains a transmitter (113) and a battery (112) for powering it and that the positive pressure apparatus (74) contains a receiver.

19. Device according to one of the preceding claims, characterized in that the telescopic arm (9, 139) is divided into two parts, to separately supply gas to the nose and mouth.

20. Device according to one of the preceding claims, characterized in that the headband (137) and the duct (135, 132, 139) pivot about two distinct axes (142, 133).

21. Use of the portable gas distribution device according to one of claims 1 to 20, as protection of the respiratory system against pollutants.