WO2017009567A1

WO2017009567A1 - Device for dispensing a material

Info

Publication number: WO2017009567A1
Application number: PCT/FR2016/051777
Authority: WO
Inventors: Frédéric MARLIN; Raphaël TEOLDI
Original assignee: Herakles
Priority date: 2015-07-13
Filing date: 2016-07-11
Publication date: 2017-01-19
Also published as: FR3038891B1; FR3038891A1

Abstract

The present invention relates to a device (1) for dispensing a material, said device (1) comprising a body (2) that defines a storage chamber (4) in which the material to be dispensed is present, and a pressurizing chamber (5) comprising a gas generator (20), the pressurizing chamber (5) being separated from the storage chamber (4) by a movable wall (7) that has at least one fragile portion (7a), the storage chamber (4) being delimited by an end wall (2b) of the body that has at least one outlet opening (10) and at least one relief (12), the gas generator (20) being configured to trigger the dispensing of the material out of the body (2) through the outlet orifice (10) by causing the device (1) to pass from a first configuration for storing the material to a second configuration for the end of dispensing of the material, the movable wall (7) being set in movement towards the end wall (2b) in order to break the fragile portion (7a) by impact with the relief during the passage from the first configuration to the second configuration.

Description

Device for dispensing a material

Background of the invention

The invention relates to a device for dispensing a material.

It is known from the state of the art to implement liquid distribution devices having two chambers separated by a piston. More specifically, such devices comprise a first chamber comprising a gas generator and a second chamber in which the liquid to be dispensed is present, the first and second chambers being separated by the piston. In these devices, the gas generator is first actuated to pressurize the first chamber. This overpressure created in the first chamber is transmitted by the piston to the liquid thus distributing it outside the device. During delivery of the liquid, the piston moves in said device and the volume of the second chamber is gradually reduced. The piston moves to abut against the bottom of the device when the material distribution is complete. In this type of device, the piston ensures at the end of the race the tightness of the system and the internal volume of the device thus remains pressurized. This residual pressurization can in some cases be a disadvantage. In addition with such systems when a pipe is connected to the outlet of the device, the pipe remains filled with liquid. The liquid present in the pipe not participating in the desired function, this causes a decrease in the effectiveness of the device. It is therefore advantageous to provide a device whose internal volume can be depressurized at the end of the liquid distribution and having improved efficiency.

Solutions have been proposed in the state of the art to solve this problem. However, these solutions remain relatively complex due to the integration of a significant number of additional elements and the need to perform a number of additional steps to manufacture such devices. There is therefore a need to provide a device for dispensing a material having a simple architecture and easy manufacture and whose internal volume can be depressurized at the end of delivery of the material.

There is further a need to provide a device with improved efficiency.

Object and summary of the invention

For this purpose, the invention proposes, in a first aspect, a device for dispensing a material, said device comprising a body defining a storage chamber in which the material to be dispensed is present and a pressurizing chamber. comprising a gas generator, the pressurizing chamber being separated from the storage chamber by a movable wall having at least one fragile portion, the storage chamber being delimited by a bottom wall of the body having at least one outlet orifice and at least one relief, the gas generator being configured to initiate the delivery of material outside the body through the outlet port by passing the device from a first material storage configuration to a second configuration of end of distribution of the material, the movable wall being moved towards the bottom wall in order to break the fragile portion by impa ct with the relief when passing from the first configuration to the second configuration.

The gas generator is configured to produce a pressurizing gas exerting pressure on the movable wall, this pressure being communicated by the movable wall to the material present in the storage chamber. The outlet orifice is, in turn, configured to allow the delivery of the material to the outside of the body following the pressurization of the storage chamber by the gas generated in the pressurizing chamber.

The device according to the invention comprises a movable wall having a fragile portion configured to be broken during impact with the relief present on the bottom wall. Once the fragile portion is broken, the pressurizing chamber is placed in communication with the environment external to the body, which advantageously allows to automatically depressurize the inside of the body. The device according to the invention has a simple arrangement and easy manufacture insofar as it is not necessary to integrate new elements to achieve the automatic depressurization, it can simply be provided by changing the movable wall to incorporate a fragile portion and by modifying the bottom wall so that it has a relief to break said fragile portion.

In an exemplary embodiment, the device may further comprise at least one distribution channel located outside the body and communicating with the outlet orifice.

Such a device advantageously makes it possible to automatically purge the distribution channel because of the evacuation of the pressurizing gas outside the body and through the distribution channel during the rupture of the fragile portion. Such a device has a particularly simple structure while having an improved efficiency insofar as the material present in the distribution channel is not lost and can be used to achieve the desired function.

In an exemplary embodiment, the fragile portion may be in the form of a portion of reduced thickness.

Alternatively, the fragile portion may be in the form of an attached membrane formed of a less rigid material than the material forming the movable wall elsewhere than on said fragile portion.

In an exemplary embodiment, the material to be dispensed may be in liquid form.

Alternatively, the material to be dispensed may be in the form of foam.

In an exemplary embodiment, the relief can be formed monolithically with the bottom wall.

Such an embodiment is advantageous in order to further simplify the manufacture of the device.

Alternatively, the relief may be in the form of an insert on the bottom wall.

In an exemplary embodiment, the gas generator may be a pyrotechnic gas generator. Alternatively, the gas generator may comprise a gas tank under pressure.

In an exemplary embodiment, the device may further comprise, when in the first configuration, a shutter sealingly closing the outlet orifice, said shutter being configured to allow the exit of the material to the outside of the body. when the pressure in the storage chamber exceeds a predefined value.

Such an exemplary embodiment advantageously makes it possible to optimize the delivery rate of the material, in particular when a pyrotechnic gas generator is used. The inventors have found that a disadvantage of the devices for dispensing a material using a pyrotechnic gas generator and a manual actuation is that, at the moment when the user actuates the opening of the outlet orifice, the pressure inside the body may have significantly decreased. Indeed, the gases generated by a pyrotechnic gas generator are hot and the pressurizing effect of the body is therefore more temporary, because of the cooling of the gas, than that provided by a gas cartridge generating cold gases. It is therefore advantageous not to postpone the expulsion of the material due to the presence of a manual actuation. Thus, the above configuration implementing the shutter advantageously makes it possible to optimize the flow rate of the material delivered by the device since, as soon as a predetermined pressure threshold is reached in the storage chamber, the shutter automatically authorizes ( ie without requiring actuation by a user) the delivery of the material to the outside of the body. Such a configuration advantageously makes it possible to best use the overpressure generated by the gas generator to dispense the material and avoids the problem of actuation by a user that can be performed at a time when the overpressure in the body has already significantly decreased . Such a configuration thus advantageously makes it possible to make best use of the advantages provided by a pyrotechnic gas generator with respect to a gas cartridge, advantages related to the ability to generate the gas according to a suitable flow time profile, in contrast to a gas cartridge. generating a drastically decreasing flow profile. In an exemplary embodiment, the pyrotechnic gas generator may comprise at least one housing comprising a pyrotechnic charge, said pyrotechnic charge having a through channel.

The presence of such a through channel in the pyrotechnic charge advantageously allows to control the flow of gas generated during the combustion of said load, or even to make this flow rate constant.

In an exemplary embodiment, the pyrotechnic gas generator may comprise a plurality of housings each comprising a pyrotechnic charge, said housings being positioned around the longitudinal axis of the body. In particular, in this case, the housing can be positioned around an ignition device configured to ignite the pyrotechnic charge present in said housing.

Such configurations advantageously make it possible to have a gas generator having a relatively compact structure.

In an exemplary embodiment, the material to be dispensed may be an extinguishing agent and the device may constitute a fire extinguisher. As a variant, the device may constitute an autonomous liquid injection device making it possible to regulate a system in temperature in the event of abnormal heating of this system. In another variant, the device may be configured to allow the neutralization of valuable documents such as bills by ink ejection.

The present invention also relates to a vehicle equipped with a device as described above.

In particular, the vehicle may be a bus and the device may, for example, be a fire extinguisher. In the case where the device is a fire extinguisher, this extinguisher can be integrated with a vehicle to allow the extinction of a fire in the engine of said vehicle.

Brief description of the drawings

Other characteristics and advantages of the invention will emerge from the following description of particular embodiments of the invention, given by way of non-limiting examples, with reference to the appended drawings, in which:

FIG. 1 represents in longitudinal section a first example of a device according to the invention in the first configuration,

FIG. 2 is a perspective view of the device illustrated in FIG.

FIGS. 3A to 3C show the passage of the device from the first configuration to the second configuration,

FIG. 4 represents a variant of mobile wall that can be used in the context of the present invention, and

- Figure 5 shows an alternative pyrotechnic gas generator that can be implemented in a device according to the invention. Detailed description of embodiments

FIG. 1 shows an exemplary device 1 according to the invention, this device 1 being in the first configuration. The device 1 comprises a body 2 extending along a longitudinal axis X and defining a storage chamber 4 in which a load (not shown) of a material to be dispensed is present. The material to be dispensed may be in the form of a liquid or a foam. In particular, the material to be dispensed may be an extinguishing agent, for example useful for extinguishing class A or B fires. The body 2 further defines a pressurizing chamber 5 comprising a gas generator 20. In FIG. example of Figure 1, the gas generator 20 is a pyrotechnic gas generator. In a variant not shown, the gas generator may be a pressurized gas cartridge. In the example illustrated in FIG. 1, the gas generator 20 comprises an initiator 26 for initiating the combustion of the relay charge 27 which will trigger the combustion of the pyrotechnic charge 23 in order to generate the pressurizing gas. The pressurizing chamber 5 is separated from the storage chamber 4 by a movable wall 7 having at least one fragile portion 7a. The body 2 has, in the example shown, a symmetrical shape of revolution, here cylindrical. Of course, the invention is not limited to such shapes for the body 2. The body 2 has a side wall 2a extending along the axis X longitudinal body 2 and surrounding the storage chamber 4. The side wall 2a of the body 2 further surrounds the pressurizing chamber 5. The body 2 further comprises a first bottom wall 2b and a second wall of background 2c. The first and second bottom walls 2b and 2c delimit longitudinally the body 2. The first bottom wall 2b delimits the storage chamber 4. The first bottom wall 2b has at least one outlet orifice 10 and at least one relief 12. The second bottom wall 2c delimits the pressurizing chamber 5. The pressurizing chamber 5 is located between the movable wall 7 and the second bottom wall 2c. The storage chamber 4 is located between the first bottom wall 2b and the movable wall 7, the latter delimiting the storage chamber 4. For example, the length l _s of the storage chamber 4 when the device 1 is in the first configuration may, for example, be between 15 cm and 90 cm. In particular, the length 1 _s may, when the device 1 is in the first configuration, be between 15 cm and 50 cm, for example between 20 cm and 40 cm, or may be between 35 cm and 90 cm. The internal diameter D of the storage chamber 4 may for example be between 6 cm and 20 cm, for example between 6 cm and 10 cm. The diameter of an element corresponds to its largest transverse dimension. When the device 1 is in the first configuration, it may in particular have for the storage chamber 4 a length l _s between 15 cm and 50 cm and an internal diameter substantially equal to 7.5 cm or a length l _s between 35 cm and 90 cm and an internal diameter substantially equal to 15 cm. The volume of the storage chamber 4 may, when the device 1 is in the first configuration, be between 0.75 L and 15 L, this volume may for example be between 0.75 L and 2 L or between 6 L and 15 L. The storage chamber 4 and the pressurizing chamber 5 have the same internal diameter.

The different elements of the device 1 of Figure 1 will now be described in more detail.

As explained above, the movable wall 7 has at least one fragile portion 7a. The movable wall 7 is configured to communicate to the material present in the storage chamber 4 the pressure imposed by the gas generated in the pressurizing chamber 5. The direction of application of the pressure by the movable wall 7 on the material to distribute is substantially parallel to the longitudinal axis X of the body 2. As illustrated, the movable wall 7 extends transversely, for example perpendicularly, relative to the longitudinal axis X of the body 2. The movable wall 7 extends over the entire internal diameter D of the storage chamber 4. The fragile portion 7a of the movable wall 7 is configured not to be broken under the effect of the pressure imposed by the gas generated in the pressurizing chamber 5 This fragile portion 7a, however, is configured to be broken upon impact with the relief or reliefs 12 present on the first bottom wall 2b. In the example illustrated in FIG. 1, the fragile portion 7a is in the form of a portion of reduced thickness. The thickness of the movable wall is measured along the longitudinal axis X. Thus, the movable wall 7 has a thinned fragile portion 7a having a thickness less than the thickness of the movable wall elsewhere than on said fragile portion 7a. The diameter of the fragile portion 7a is sufficient to achieve the desired evacuation of the pressurizing gas. The diameter of the fragile portion 7a may advantageously be greater than or equal to the diameter of the outlet orifice.

In the example shown, the fragile portion 7a has been shown as part of the portion of the movable wall 7 located on the side of the pressurizing chamber 5 (left portion in Figure 1 when the X is at the horizontal) but it is not beyond the scope of the invention when this is not the case, the fragile portion may alternatively be part of the portion of the movable wall located on the side of the storage chamber (right portion on Figure 1 when the X axis is horizontal).

When the device 1 is in the first configuration, the movable wall 7 has no through aperture. The movable wall 7 may be formed of a metallic material, for example aluminum. Advantageously, the movable wall 7 consists of a single material and this to further simplify the manufacturing process of the device 1. Before the device 1 is in the second configuration, the movable wall 7 is configured to separate in a sealed manner the storage chamber 4 of the pressurizing chamber 5. Thus, the movable wall 7 is, in particular, configured to sealingly separate the storage chamber 4 from the pressurizing chamber 5 when the device 1 is in the first configuration. The device 1 has, in addition, an outlet orifice 10 positioned on the first bottom wall 2b configured to deliver the material outside the body 2 during the actuation of the gas generator 20.

The device 1 further comprises, when in the first configuration, a shutter 15 sealingly sealing the outlet orifice 10, said shutter 15 being configured to allow the exit of the material outside the body 2 when the pressure in the storage chamber 4 exceeds a predefined value. In other words, the shutter 15 is configured to prevent, when in a first configuration, the exit of the material outside the body 2, the shutter 15 is further configured to go into a second configuration when the pressure in the storage chamber 4 exceeds a predefined value, this second configuration of the shutter 15 allowing the exit of the material outside the body 2. The shutter 15 may, for example, be in the form of a membrane configured to yield when the pressure in the storage chamber 4 exceeds a predefined value. In this case, the shutter 15 may, for example, be an aluminum or alloy membrane of Inconel® type. Alternatively, the shutter 15 may be configured to move without yielding when the pressure in the storage chamber 4 exceeds a predefined value, thereby allowing the material to exit outside the body 2 through the exit port 10. In this case, the shutter 15 may for example be in the form of a valve, for example in the form of a spring valve. As explained above, the presence of the shutter is advantageous in order to overcome the need for a user to actuate the delivery of the material to the outside of the body. This advantageously makes it possible to optimize the flow of material delivered by the device. A distribution channel 18 may be connected to the outlet orifice as shown in FIG. 1 allowing the distribution of the material in an area to be treated. Alternatively, the device is devoid of such a distribution channel.

It is not beyond the scope of the present invention when the device comprises a plurality of outlet orifices on the first bottom wall, all or part of these holes being or not closed by a shutter as described above. We do not leave the framework of the invention when the device is devoid of such a shutter. In the latter case, the delivery of the material to the outside of the body is actuated by a user.

The first bottom wall 2b is provided on its inner face with a plurality of reliefs 12 present in the storage chamber 4. It is not beyond the scope of the present invention when a single relief is present on the inner face of the first bottom wall. As illustrated in FIG. 2, the relief or reliefs 12 may be positioned around the outlet orifice 10. These reliefs 12 are salient and serve as a punch by making it possible to break the fragile portion 7a during the impact with the latter. . The relief or reliefs 12 extend between a proximal end 12a connected to the first bottom wall 2b and a distal end 12b. The invention is not limited to a particular shape for the distal end 12b or reliefs 12 as the reliefs or 12 are able to break the fragile portion 7a by impact with the latter. The distal end 12b of the relief or reliefs can for example have a pointed shape or a rounded shape. In the particular case illustrated in Figure 2, the reliefs 12 may be formed by making two grooves non-parallel to each other in a cone present on the first bottom wall 2b. The reliefs 12 may for example be formed by making two grooves perpendicular to each other in a cone present on the first bottom wall 2b. In the illustrated example in which the relief or reliefs 12 are positioned around the outlet orifice 10, the zone of the fragile portion 7a broken by the relief or reliefs 12 is located opposite (opposite) the orifice of outlet 10. This rupture of the fragile portion 7a facing even the outlet orifice 10 reliably ensures the evacuation of the pressurizing gas contained in the pressurizing chamber 5 through the outlet port 10, while retaining a relatively simple structure device.

The relief or reliefs 12 may be formed of a metallic material, for example aluminum or steel. The relief or reliefs 12 are advantageously formed monolithically with the first bottom wall 2b. In this case, the first bottom wall 2b and the relief or reliefs 12 may each be aluminum. Alternatively, the relief or reliefs are in the form of elements attached to the first bottom wall. In this case, the first bottom wall may for example be aluminum and the relief or reliefs may be steel.

The distribution of the material by the device according to the invention will now be described in connection with FIGS. 3A to 3C.

The gas generator 20 is first actuated to pressurize the chamber 5. This pressure created in the pressurizing chamber 5 is transmitted by the movable wall 7 to the material present in the storage chamber 4. Once a preset value reached for the pressure in the storage chamber 4, the shutter 15 passes into a second configuration allowing the exit of the material outside the body 2 through the outlet orifice 10. The predefined value of the pressure in the storage chamber 4 from which the shutter 15 passes in the second configuration may be greater than or equal to 20 bar, or even 40 bar, for example when the device is present in a medium having a temperature of 20 ° vs. The duration during which the material is delivered outside the body 2 may, for example, be greater than or equal to 1 second, or even 5 seconds, or even 10 seconds. During its operation, the device 1 may be horizontal or vertical and, for example, be mounted on a vehicle. The distribution of the material outside the body 2 can be done by ejection or spraying. The device 1 may in particular constitute an extinguisher for the delivery of an extinguishing agent on a fire zone.

As soon as the material begins to be delivered outside the body, the passage of the device from the first configuration to the second configuration is initiated. As illustrated in Figure 3B, the movable wall 7 is moved to the first bottom wall 2b during the passage of the device 1 of the first configuration to the second configuration. The movable wall 7 is set in motion along the longitudinal axis X during this passage. During the passage of the device 1 from the first configuration to the second configuration, the volume of the pressurizing chamber 5 increases and the volume of the storage chamber 4 decreases. The sum of the volume of the pressurizing chamber 5 and the volume of the storage chamber 4 is constant during the passage of the device 1 from the first configuration to the second configuration. The movement of the mobile wall 7 during the passage of the device 1 of the first configuration in the second configuration allows to continue to deliver the material outside the body 2. In the example shown, the movable wall 7 is configured to move without deformation during the passage of the device 1 from the first configuration to the second configuration. The movable wall 7 has a piston effect. The face of the movable wall 7 located on the side of the pressurizing chamber 5 is subjected to the pressure of the generated gas, this pressure is communicated to the face of the movable wall 7 situated on the side of the storage chamber 4 in order to allow the distribution of the material outside the body 2. The movable wall 7 causes, during its movement, the distribution of the material outside the body 2 in the manner of a syringe. The movable wall 7 is displaced until it abuts against the first bottom wall 2b. The fragile portion 7a deforms and then breaks when it hits the reliefs 12. When the device is in the second configuration, the fragile portion is broken, the latter being for example perforated by the reliefs 12. The reliefs 12 may further be configured to perforate the fragile portion 7a and block the movable wall 7 in position once this fragile portion 7a perforated.

The rupture of the fragile portion 7a advantageously allows the pressurizing gas contained in the device at the end of distribution of the material to evacuate through the outlet orifice. The gas can be evacuated, leaving no residual pressure in the body. The interior of the body can thus be at atmospheric pressure (1 bar) when the device is in the second configuration. By evacuating the gas can also drain a possible distribution channel connected to the outlet port 10 and thus increase the amount of material dispensed by avoiding the retention of this material in said distribution channel. Depending on the applications, the volume of the distribution channel or channels may be significant and the purging of the material of these channels advantageously makes it possible to improve the functional efficiency of the device.

The device according to the invention has a low cost and is easy to manufacture. The device according to the invention may be for single use. Alternatively, it is possible, after using the device, to remove the first bottom wall and replace the movable wall whose fragile portion has been broken by a new movable wall having an intact fragile portion. The device can thus be filled again with material to distribute and reclose through the first bottom wall for next use.

FIG. 4 shows a variant of mobile wall 7 'that can be used in the context of the present invention. In this embodiment, the fragile portion 7'a is in the form of an attached membrane 30 formed of a less rigid material than the material forming the movable wall elsewhere than on said fragile portion. The added membrane 30 may for example have a disk shape. As for the thinned thin portion, the membrane 30 is sufficiently rigid not to be broken under the effect of the pressure imposed by the gas generated in the pressurizing chamber 5. This membrane 30 is, however, configured to be broken when the impact with the relief or reliefs present on the first bottom wall. The membrane 30 is in the illustrated example attached to the remainder of the movable wall 7'a by gluing (layer (s) of adhesive 31). As a variant it is possible for this membrane to be fixed by mechanical fixing. The membrane 30 may for example be formed of a metallic material. The membrane 30 may for example be in the form of an aluminum foil. Thus, in this embodiment, the movable wall 7 'has a portion of thinned thickness 7 which is for example a lack of material area as illustrated. Thinned thickness portion 71 'and membrane 30 are superimposed along longitudinal axis X. In the illustrated example, diaphragm 30 is located on the side of the pressurizing chamber but it is not outside the scope of the invention when the membrane is located on the side of the storage chamber.

FIG. 5 shows a variant of a pyrotechnic gas generator 20 'that can be used in the context of the present invention. The operation of a pyrotechnic gas generator makes it possible to ensure the combustion of one or more pyrotechnic charges in order to generate a combustion gas which will pressurize the pressurizing chamber and, consequently, the storage chamber so as to to activate the distribution of the material, as explained above. As illustrated in FIG. 5, the pressurizing chamber may comprise a pyrotechnic gas generator 20 'comprising a plurality of housings 22, each of these housings 22 comprising a pyrotechnic charge 23. It is not beyond the scope of the present invention when the generator pyrotechnic gas comprises a single housing provided with its pyrotechnic charge. The gas generator 20 'further comprises an ignition device 25 configured to ignite the pyrotechnic charge 23 present in the housings 22. The gas generator 20' can be electrically tripped by applying an electric current to the terminals of the initiator or mechanical (percussion trigger). In the case of a mechanical trigger, a striker strikes the ignition device. In all cases, the initiation of the ignition device 25 leads to the combustion of the central load and thus triggering the combustion of the pyrotechnic charges 23 and the release of the gases from the combustion.

The pyrotechnic charges 23 are in the example illustrated in the form of monolithic blocks having at least one channel opening 24. The presence of this opening channel 24 is optional. In a variant not illustrated, the pyrotechnic charges may be in the form of a granular material. It is of course possible to have in the same pyrotechnic gas generator a first part of the pyrotechnic charges which are in the form of monolithic blocks and a second part of the pyrotechnic charges which are in the form of a granular material.

The pyrotechnic charges 23 used in the gas generator 20 'may have the same composition as the pyrotechnic charges typically used in gas generators for airbags. Of course, the pyrotechnic charges 23 have dimensions adapted to the intended operating time (i.e. larger than those of the pyrotechnic charges used in gas generators for airbags). Pyrotechnic compositions that may be used in the gas generator 20 'have in particular been described in the following documents: US 5,608,183, US 6,143,102, FR 2,975,097, FR 2,964,656, FR 2,950,624, FR 2 915 746, FR 2 902 783, FR 2 899 227, FR 2 892 117, FR 2 891 822, FR 2 866 022, FR 2 772 370 and FR 2 714 374.

In the example of Figure 5, the housings 22 are positioned around the longitudinal axis of the body of the device. As illustrated, the housings 22 extend radially (perpendicular to the longitudinal axis of the body). The example shown in Figure 5 comprises a first group of housing superimposed on a second group of housing, the housing of the first group being present at a first height in the body and the housing of the second group being present at a second height in the body different from the first height. Of course, it is not beyond the scope of the invention when the pyrotechnic gas generator comprises a single group of housings positioned around the longitudinal axis of the body of the device, said housing being all present at the same height in the body. In the illustrated example, each of the housings 22 incorporates a single pyrotechnic charge 23. In addition, each of the housings 22 comprises a wall having a shape of revolution, for example a cylindrical shape, this wall defining an interior volume in which the load 23 is present. In the example of FIG. 5, the housings 22 are positioned around an ignition device 25 configured to ignite the pyrotechnic charges 23 present in said housings. The ignition device 25 has radial orifices, each orifice being situated opposite a pyrotechnic charge 23. The ignition device 25 is as illustrated in FIG. 5 present in a central part of the pyrotechnic gas generator 20 '. In addition, all or part of the pyrotechnic charges 23 may, as shown in FIG. 5, have a channel opening 24. Each channel 24 opens at two opposite ends of a pyrotechnic charge 23. The presence of such a through channel in the pyrotechnic charge advantageously allows to control the flow of gas generated during the combustion of said pyrotechnic charge, or even to make this flow rate constant. The gas generator 20 'illustrated in Figure 5 advantageously has a relatively compact structure and a small footprint.

The expression "understood between ... and ..." or "from ... to ..." must be understood as including the boundaries.

Claims

1. Device (1) for dispensing a material, said device (1) comprising a body (2) defining a storage chamber (4) in which the material to be dispensed is present and a pressurizing chamber ( 5) comprising a gas generator (20; 200), the pressurizing chamber (5) being separated from the storage chamber (4) by a movable wall (7; 70 having at least one fragile portion (7a; 7 '); a), the storage chamber (4) being delimited by a bottom wall (2b) of the body having at least one outlet orifice (10) and at least one relief (12) positioned around the outlet orifice (10), the gas generator (20; 20 being configured to initiate the delivery of material outside the body (2) through the outlet (10) by passing the device (1) through a first configuration of storing the material at a second end-of-distribution configuration of the material, the movable wall (7 70 being moved towards the bottom wall (2b) to break the fragile portion (7a; 7'a) by impact with the relief when passing from the first configuration to the second configuration.

2. Device (1) according to claim 1, further comprising at least one distribution channel located outside the body (2) and communicating with the outlet (10).

3. Device (1) according to any one of claims 1 or 2, the fragile portion (7a) being in the form of a portion of reduced thickness.

4. Device according to any one of claims 1 or 2, the fragile portion (7'a) being in the form of an attached membrane (30) formed of a less rigid material than the material forming the movable wall (70). elsewhere than on said fragile portion (7'a).

5. Device according to any one of claims 1 to 4, the material to be dispensed being in liquid form.

6. Device (1) according to any one of claims 1 to 5, the relief (12) being formed monolithically with the bottom wall (2b).

7. Device (1) according to any one of claims 1 to 6, further comprising, when in the first configuration, a shutter (15) sealingly closing the outlet orifice (10), said shutter (15) being configured to allow the exit of the material outside the body (2) when the pressure in the storage chamber (4) exceeds a predefined value.

8. Device according to any one of claims 1 to 7, the gas generator being a pyrotechnic gas generator.

9. Device according to any one of claims 1 to 7, the gas generator comprising a gas tank under pressure.

10. Device according to claim 8, the pyrotechnic gas generator (200 comprising at least one housing (22) comprising a pyrotechnic charge (23), said pyrotechnic charge (23) having a through channel (24).

11. Device according to any one of claims 8 or 10, the pyrotechnic gas generator (200 comprising a plurality of housings (22) each comprising a pyrotechnic charge (23), said housings (22) being positioned around the axis longitudinal (X) of the body (2).

12. Device according to claim 11, the housing being positioned around an ignition device (25) configured to ignite the pyrotechnic charge (23) present in said housing (22).

13. Device according to any one of claims 1 to 12, the material to be dispensed being an extinguishing agent and the device constituting a fire extinguisher.

14. Vehicle equipped with a device (1) according to any one of claims 1 to 13.