• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Extinguisher comprising a reservoir of extinguishing agent, a first and a second cartridge (8,9) of pressurized gas arranged so as to be able to release pressurized gas in the reservoir, a first punch (10) capable of piercing a first opening in the first cartridge (8) and a second punch (11) capable of piercing a second opening in the second cartridge (9), the first cartridge being movable between a rest position and an actuation position in which it cooperates with the second punch for piercing the second cartridge, characterized in that the first punch and the first cartridge are arranged to pierce the first opening on the side opposite to the second punch, so that the displacement of the first cartridge from its position of rest in its actuating position is caused at least in part by the gas exiting through the first opening.
    公开号:BE1019616A3
    申请号:E200900470
    申请日:2009-08-05
    公开日:2012-09-04
    发明作者:Bouaza Mesli；Michel Lahouati
    申请人:Eurofeu Sa；
    IPC主号:
    专利说明:

    DESCRIPTION
    EXTINGUISHER WITH TWO CARTRIDGES OF GAS
    Technical field of the invention
    The present invention relates to a fire extinguisher. In particular, the present invention relates to an auxiliary pressure extinguisher.
    State of the art
    An auxiliary pressure fire extinguisher of known type comprises a tank of fire extinguishing agent and a cartridge of pressurized gas. To use the fire extinguisher, the user must strike the cartridge to release the gas into the tank, then he can operate a handful of extinguisher to expel the extinguishing product.
    In order for the fire extinguisher to function properly, the cartridge must be dimensioned correctly in relation to the tank. A disadvantage for the fire extinguisher manufacturer is therefore that he must stock cartridges of different sizes to equip his fire extinguishers of different sizes. For example, a fire extinguisher called "2kg" should be equipped with a cartridge about twice as big as a fire extinguisher called "1kg".
    The document WO 2004/078263 describes an auxiliary pressure extinguisher comprising two cartridges of pressurized gas to be pierced during the percussion. The cartridges are arranged head to tail with a spring and a piercing insert between them. During percussion, the upper cartridge moves towards the insert and is pierced by it. At the same time, the upper cartridge pushes the insert towards the lower cartridge in order to pierce it.
    A disadvantage of this extinguisher is that the stroke of the upper cartridge during the percussion must be large enough to allow the drilling of the two cartridges. In addition, it is difficult to correctly size the spring and tips of the insert to ensure satisfactory operation and check applicable safety standards.
    Summary of the invention
    A problem that the present invention proposes to solve is to provide an extinguisher that does not exhibit at least some of the aforementioned drawbacks of the prior art.
    The solution proposed by the invention is an extinguisher comprising an extinguishing agent tank, a first and a second cartridge of pressurized gas arranged so as to release pressurized gas into the tank, a first punch capable of piercing a first opening in the first cartridge and a second punch capable of piercing a second opening in the second cartridge, the first cartridge being movable between a rest position and an actuating position in which it cooperates with the second punch to pierce the second cartridge , characterized in that the first punch and the first cartridge are arranged to pierce the first opening on the opposite side to the second punch, so that the movement of the first cartridge from its rest position to its actuated position is caused at least in part by the gas exiting through the first opening.
    An advantage of this extinguisher is that the two cartridges can be the same as that used alone in a smaller extinguisher. The extinguisher manufacturer must therefore stock only one type of cartridge. In addition, since the movement of the first cartridge towards its actuating position is caused at least in part by the gas, this displacement must not be caused entirely by the displacement of the first punch. The race of the first punch must not be very big. It may be just enough to pierce the first opening.
    Preferably, the fire extinguisher comprises a dip tube, and the first cartridge is arranged in the dip tube. Advantageously, the second cartridge is also arranged in the dip tube. The plunger tube guides the movement of the first cartridge.
    According to one embodiment, a first spring holds the first punch away from the first cartridge and a second spring holds the second punch away from the second cartridge, the first spring being less stiff than the second spring.
    Preferably, the second punch is fixed on a support, the first cartridge being in contact with the support in its rest position.
    Advantageously, the extinguisher comprises a pin capable of being removed and moving a cam during removal, the movement of the cam causing the displacement of the first punch to pierce the first opening in the first cartridge.
    Since, thanks to the aforementioned characteristics, the displacement of the first punch must not be very large, the displacement of the cam must not be very large either. The cooperation between the pin and the cam can therefore introduce a significant reduction, which allows to remove the pin without requiring significant force.
    BRIEF DESCRIPTION OF THE DRAWINGS The invention will be better understood, and other objects, details, characteristics and advantages thereof will appear more clearly in the following description of a particular embodiment of the invention, given solely to illustrative and non-limiting, with reference to the accompanying drawings. In these drawings: - Figure 1 is a partial sectional view of a fire extinguisher according to one embodiment of the invention, in a state before use, and - Figures 2 and 3 are views similar to Figure 1, during percussion.
    DETAILED DESCRIPTION OF ONE EMBODIMENT OF THE INVENTION The fire extinguisher comprises a reservoir (not shown) containing extinguishing product, for example, extinguishing powder. The tank has a neck at which is fixed a head 1, with a thread 3. The extinguisher also comprises a dip tube 2 attached to the head 1 and which extends into the tank towards the bottom.
    The head 1 comprises a handle 4. When using the extinguisher, the handle 4 allows, via a cam 6, to move a valve 7 to allow the extinguishing product out of the 'extinguisher.
    Before use, the head 1 comprises a pin 5 which prevents the handle 4 from being actuated. The pin 5 can be removed by pulling it to the right of FIG. 1. The pin 5 has a cam portion 16 which, during the withdrawal of the pin 5, cooperates with the cam 6 to move the valve 7.
    The extinguisher comprises a first cartridge 8 and a second cartridge 9. The cartridge 8 is metallic and has, at its upper end, a zone 17 which can be pierced. It contains pressurized gas, for example CO 2. Cartridge 9 is identical to cartridge 8.
    A support 12 is arranged in the dip tube 2, between the cartridge 8 and the cartridge 9. A punch 11 is fixed to the support 12 with its tip facing the area 17 of the cartridge 9. A spring 14 holds the support 12 apart from the cartridge 9 so that, at rest, the punch 11 does not pierce the cartridge 9.
    On the side opposite to the support 12, the cartridge 9 bears against an abutment 15 formed by a deformation of the plunger tube 2. The cartridge 9 is thus fixed in the plunger tube 2.
    The cartridge 8, it is movably arranged in the plunger tube 2. It rests against the support 12. The zone 17 of the cartridge 8 faces a punch 10 attached to the valve 7. A spring 13 holds the flap 7 spaced apart of the cartridge 8 so that, at rest, the punch 10 does not pierce the cartridge 8.
    The operation of the extinguisher is described below.
    Figure 1 shows the extinguisher in a state of rest, before use. The punches 10 and 11 are respectively remote cartridges 8 and 9. The pin 5 prevents the actuation of the handle.
    In FIG. 2, the user has started to pull on the pin 5. As the pin 5 moves, the cam portion 16 pushes on the cam 6 and rotates it. The cam 6 presses the valve 7 and moves it downwards, against the action of the spring 13. The compression force exerted on the spring 13 is transmitted through the cartridge 8 and the support 12, spring 14. However, as the spring 13 is less stiff than the spring 14, the spring 14 is compressed little. Thus, as can be seen in FIG. 2, the punch 10 pierces an opening in the cartridge 8, whereas the punch 11 has not yet reached the cartridge 9.
    Pressurized gas thus escapes from the cartridge 8, on the opposite side to the support 12 and the punch 11. The cartridge 8 then undergoes an opposite acceleration to the degassing direction, that is to say towards the bottom of the FIG. 2. It therefore moves downwards and pushes on the support 12 so as to move it against the action of the spring 14. The punch 11 then moves until it pierces an opening in the cartridge 9, allowing the release of the gas from the cartridge 9. In other words, the cartridge 8 cooperates with the punch 11, via the support 12, in order to pierce the cartridge 9.
    The displacement of the punch 11 is therefore caused by the displacement of the first cartridge 8, itself caused mainly by the degassing and not by the displacement of the first punch 10. The stroke of the punch 10 may be just sufficient to pierce the first cartridge 8. The cooperation between the cam portion 16 and the cam 6 can therefore introduce a reduction, which allows to remove the pin 5 without having to exert a large force.
    It should be noted that in practice, the drilling of the second cartridge 9 occurs very shortly after that of the first cartridge 8. The two degassings occur almost simultaneously.
    In Figure 3, the pin 5 is completely removed.
    Under the action of the spring 13, the valve 7 resumes its initial position and pushes the cam 6 to the handle 4. In the state shown in Figure 3, the fire extinguisher is ready for use, its reservoir being under pressure .
    By pressing the handle 4, the user moves the valve 7 and allows the extinguishing product out of the extinguisher through the dip tube 2 under the effect of pressure. For this purpose, the support 12 comprises a recess 18 allowing the passage of the extinguishing product.
    It may be noted that in order to manufacture a fire extinguisher according to an embodiment not forming part of the invention, comprising a reservoir of smaller dimensions, many elements identical to those described above can be used. This allows the manufacturer to limit the number of different parts needed.
    For example, compared to the fire extinguisher described above with reference to the figures, it is conceivable another extinguisher whose reservoir is twice as small by removing the support 12, the punch 11, the spring 14 and the cartridge 9. The abutment 15 is then formed above the plunger tube 2 to hold the cartridge 8 in place.
    Although the invention has been described in connection with a particular embodiment, it is obvious that it is not limited thereto and that it comprises all the technical equivalents of the means described and their combinations if they are within the scope of the invention.
    权利要求:
    Claims (6)
    [1]
    An extinguisher comprising an extinguishing agent tank, a first and a second cartridge (8, 9) of pressurized gas arranged so as to release pressurized gas into the reservoir, a first piercing punch (10) capable of piercing a first opening in the first cartridge (8) and a second punch (11) adapted to pierce a second opening in the second cartridge (9), the first cartridge being movable between a rest position and an actuating position in which it cooperates with the second punch to pierce the second cartridge, characterized in that the first cartridge is able to move from its rest position to its actuating position at least partly under the action of the gas exiting through the first opening the first punch and the first cartridge being arranged to pierce the first opening on one side of the first cartridge opposite the second punch.
    [2]
    2. Fire extinguisher according to claim 1, comprising a dip tube (2), the first cartridge being arranged in the dip tube.
    [3]
    3. Fire extinguisher according to claim 2, wherein the second cartridge is also arranged in the dip tube.
    [4]
    4. Fire extinguisher according to one of the preceding claims, wherein a first spring (13) keeps the first punch away from the first cartridge and a second spring (14) keeps the second punch away from the second cartridge, the first spring being less steep than the second spring.
    [5]
    5. Fire extinguisher according to one of the preceding claims, wherein the second punch is fixed on a support (12), the first cartridge being in contact with the support in its rest position.
    [6]
    6. Fire extinguisher according to one of the preceding claims, comprising a pin (5) adapted to be removed and to move a cam (6) during removal, the displacement of the cam causing the displacement of the first punch to pierce the first opening in the first cartridge.
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    同族专利:
    公开号 | 公开日
    FR2934957A1|2010-02-19|
    FR2934957B1|2010-09-17|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    GB363235A|1931-02-27|1931-12-17|Roland Norton|Improvements in and relating to fire extinguishing apparatus|
    JPS5549876B2|1977-06-02|1980-12-15|
    CH663835A5|1984-03-02|1988-01-15|Pewa Technic Ag|GAS SUPPLY DEVICE WITH SEVERAL GAS BOTTLES INSERTED IN A PRESSURE GAS CONTAINER.|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    FR0855530A|FR2934957B1|2008-08-12|2008-08-12|EXTINGUISHER WITH TWO CARTRIDGES OF GAS|
    FR0855530|2008-08-12|
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