• 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:
    The invention relates to a pyrotechnic breaking device (1) comprising a first (21) and a second (22) pyrotechnic initiator, and a body (10) in which are present: a conductive portion of electricity (40), and a movable cutting element (30) having an insulating relief (33) facing the conductive portion. The device further comprises a fuse element (50) connected in series with the conductive portion (40), the first initiator (21) being connected across the fuse element (50) so that a triggering of the element fuse actuates the first initiator, each initiator (21, 22) being configured to pass the device from a current flow pattern to a current cutoff configuration, the movable cutoff element (30) being moved to the conductive portion (40) for breaking it by impact with the relief (33) during the passage from the first to the second configuration.
    公开号:FR3073664A1
    申请号:FR1760702
    申请日:2017-11-14
    公开日:2019-05-17
    发明作者:Alexandre Mathieu；Romain Lorenzon；Jean-Francois de Palma
    申请人:Mersen France SB SAS；ArianeGroup SAS；
    IPC主号:
    专利说明:

    Invention background
    The present invention relates to the general field of electrical cut-off devices, and more particularly those of the type with pyrotechnic actuation. The invention also relates to a power supply system secured by such a device.
    Are known pyrotechnic cutoff devices comprising a body in which is present a pyrotechnic initiator configured to, when triggered, set in motion a piston provided with a relief in the direction of a conductive bar to cut it. The documents WO 2016/038043 and WO 2016/038050 show examples of devices of this type which make it possible to make a cut in the event of an overcurrent in a circuit.
    It would be desirable to cut the power not only in the event of an overcurrent, but also when a non-electrical anomaly occurs (a shock for example). There is therefore a need to have a reliable, compact and reduced cost cutting solution for this purpose.
    Subject and summary of the invention
    The main object of the present invention therefore is to overcome such drawbacks by proposing a pyrotechnic cut-off device comprising a first and a second pyrotechnic initiator, and a body in which are present:
    an electrically conductive portion, at least part of which is present in a chamber present in the body, and
    - A movable cut-off element delimiting the chamber and having an electrically insulating relief which is opposite the conductive portion.
    The device further comprises a fuse element connected in series with the conductive portion and configured to trip when the intensity of the current flowing through it exceeds a predetermined value, the first initiator being connected to the terminals of the fuse element so that a triggering of the fuse element actuates the first initiator, each initiator being configured to switch the cut-off device from a first current flow configuration to a second current cut configuration, the movable cut element being set movement towards the conductive portion in order to break it by impact with the relief during the transition from the first to the second configuration. When the current passing through the conductive portion reaches the fuse tripping threshold (predetermined current value), all the current then passes through the first initiator, which also causes it to trip and cut off the current by breaking the conductive portion. When the second initiator is triggered, for example using a control element external to the device, the conductive portion is also broken and the current is cut.
    The breaking device according to the invention thus makes it possible to have the advantages of a breaking device triggered automatically by a current threshold being exceeded (first initiator), and of another breaking device triggered by another anomaly (second initiator). ), without the bulk that an assembly with two such devices connected in series would represent. The use of two separate initiators which are then triggered by separate connectors avoids the coupling between the fuse element and the control element which would result from the use of a single initiator which would be connected to both a fusible element and a control element. Such coupling can then deteriorate the control element if the current threshold value from which the fuse element is tripped is exceeded. The device according to the invention is thus reliable, of simple and compact design, and preserves the integrity of the control element which can be connected to the second initiator in the event of tripping in response to a current threshold being exceeded.
    Each initiator can have an outlet, each outlet being in communication with a pressurization chamber delimited by the movable cut-off element. The movable cut-off element can thus separate the pressurizing chamber from the chamber in which the conductive portion is present. The movable cut-off element can be a piston having an oblong cross-section in a plane perpendicular to an axis along which it moves in the cut-off device.
    In an exemplary embodiment, the movable breaking element can be configured to break the conductive portion by impact with the relief at a zone distinct from that where the fusible element is present during the passage from the first to the second configuration.
    In an exemplary embodiment, the fusible element may be present inside the body. In particular, the fusible element may be present in the chamber in which the conductive portion is present.
    In an exemplary embodiment, the fusible element may be present in a second chamber present in the body and distinct from the chamber in which the conductive portion is present. This second chamber can be a cavity present inside the body, for example arranged under the conductive portion.
    In an exemplary embodiment, the fusible element may be present in an insulating envelope containing a powder of an electrically insulating material.
    In an exemplary embodiment, the fusible element can be attached to the conductive portion.
    In an exemplary embodiment, the fusible element may consist of a thinned region of the conductive portion.
    In an exemplary embodiment, the movable cut-off element may comprise at least one second relief facing the conductive portion, and the conductive portion may have at least one guide slot intended to cooperate with the second relief during the passage of the first to the second configuration, the second relief being, in the first configuration, closer to the conductive portion than the insulating relief. Such an arrangement improves the reliability of the cut. Indeed, during the passage from the first to the second configuration, and before the insulating relief impacts the conductive portion, the second relief will engage in the corresponding slot of the conductive portion and will guide the piston while maintaining in position the conductive portion at the time of impact with the piston. In an exemplary embodiment, the second relief may extend transversely relative to the relief which is intended to impact the conductive portion. In an exemplary embodiment, the second relief can extend from a lower face of the movable cut-off element over a distance greater than the distance over which the relief extends which is intended to impact the conductive portion at from said face.
    The subject of the invention is also a secure supply system comprising at least:
    - a switching device such as that presented above,
    a supply circuit connected to the breaking device, the conductive portion being connected to the supply circuit, and
    - a control element configured to activate the second initiator when an anomaly is detected.
    In an exemplary embodiment, the anomaly can be a nonelectric anomaly. By "non-electrical anomaly" is meant, for example, a shock, that is to say an abrupt movement such as an abrupt deceleration of the control element to which the breaking device can be connected, or an overshoot of the threshold. temperature or pressure in the environment of the control element.
    The invention also relates to a secure electrical system comprising a secure supply system as defined above, and a device supplied by said secure supply system. An electrical installation may include such a secure electrical system.
    Such a secure electrical system can be found for example in a motor vehicle, an airplane, a train, a photovoltaic installation, an autonomous domestic installation.
    Brief description of the drawings
    Other characteristics and advantages of the present invention will emerge from the description given below, with reference to the appended drawings which illustrate an example thereof without any limiting character. In the figures:
    FIG. 1 is an exploded perspective view of a cut-off device according to a first embodiment of the invention,
    FIGS. 2A and 2B show a cut-off device according to an embodiment of the invention respectively in the first and in the second configuration in cross section according to the planes IIA and IIB of FIGS. 3A and 3B,
    FIGS. 3A and 3B show views in longitudinal section of the cut-off device respectively in the configurations of FIGS. 2A and 2B along the longitudinal planes IIIA and IIIB separating the two initiators,
    FIG. 4 shows a secure electrical system comprising a secure supply system according to an embodiment of the invention,
    FIGS. 5 and 6 respectively show a cut-off device according to a second embodiment of the invention in longitudinal section and the conductive portion used in this embodiment, and
    - Figure 7 shows a cutting device according to a third embodiment of the invention in longitudinal section.
    Detailed description of the invention
    Figure 1 shows an exploded view of a switching device 1 according to a first embodiment of the invention. The switching device 1 illustrated comprises: a body 10, a pyrotechnic initiation system 20, a piston 30, a conductive portion 40, a fuse element 50, and a support 60. The fuse element 50 is, according to the invention , connected in series to the conductive portion 40. In the example illustrated, the longitudinal direction L corresponds to the direction in which the conductive portion 40 extends in the device 1. The transverse direction T is perpendicular to the direction L in the plane of the conductive portion 40.
    The body 10 comprises two lateral openings 11 on two opposite faces of the body 10 (only a lateral opening 11 is visible in FIG. 1) through which the support 60 can be inserted inside the body 10, a lower opening 12 (figures 2A-3B) through which the piston 30 can be inserted inside the body 10, and two upper openings 13a and 13b projecting from an upper face of the body 10. The pyrotechnic initiation system 20 comprises a first pyrotechnic initiator 21 and a second pyrotechnic initiator 22 respectively provided with electrical connectors 21a and 22a which pass through the openings 13a and 13b. The lateral openings 11 extend in the longitudinal direction L and meet inside the body 10 to form a housing in which the support 60 is held in the body 10.
    The electrical connectors 21a and 22a of the pyrotechnic initiators 21 and 22 are configured to each initiate a pyrotechnic charge 21b and 22b to which they are connected. Each pyrotechnic charge 21b and 22b is, when it is initiated (they can be initiated separately) for example using a current passing through the electrical connectors 21a or 22a, capable of generating a pressurization gas by its combustion. According to the invention, the first pyrotechnic initiator 21 is connected, here by means of its connectors 21a, in parallel to the fuse element 50 (that is to say connected to the terminals of the fuse element 50). The second pyrotechnic initiator 22 can be connected via its connectors 22a to a control element Ç (FIG. 4) configured to actuate the second pyrotechnic initiator 22 when an anomaly is detected.
    The piston 30, constituting a movable cutting element within the meaning of the invention, has an oblong section in a plane perpendicular to a vertical direction Z of the cutting device 1. The direction Z corresponds to the direction in which the piston 30 moves in the cutting device 1, and is here perpendicular to the directions L and T. The cutting device 1 here comprises a single piston 30. The piston 30 comprises a circumferential groove 31 in which a seal 32, for example an O-ring is intended to be housed. When the piston 30 is in the cut-off device 1, the O-ring 32 seals between the body 10 and the piston 30. The piston 30 can move in the direction Z inside the body 10 between a high position ( first position, device in the first configuration), as in FIGS. 2A and 3A, and a low position (second position, device in the second configuration), as in FIGS. 2B and 3B. As long as a pyrotechnic initiator 21 or 22 has not been triggered, the piston 30 is kept in the high position. Of course, the piston 30 may have a shape different from that illustrated, adapted to the shape of the cavity inside the body in which it moves.
    As illustrated in FIGS. 2A-2B and 3A-3B, the body 10 comprises a pressurization chamber 14 in communication with outputs SI and S2 of the pyrotechnic initiators 21 and 22, and a chamber 15 in which the conductive portion is present 40. The piston 30 thus separates the pressurization chamber 14 from the chamber 15 hermetically using the seal 32.
    According to the invention, the piston 30 has a relief 33 insulating from electricity. More specifically, the piston 30 here comprises a lower face 34 from which the relief 33 projects. The relief 33 is located opposite the conductive portion 40. The relief 33 generally extends here in the transverse direction T. The relief 33 here has a dimension in the transverse direction T which is equal to or slightly greater than the dimension, in this same direction T, of the conductive portion 40. The relief 33 also extends in the direction L and has a non-zero thickness in this direction L. The piston 30 here comprises, on the side of the initiators 21 and 22, a skirt 35 delimiting the pressurizing chamber 14 and making it possible to guide the piston 30 in the body 10.
    The conductive portion 40 takes, in the example illustrated, the form of a wafer having a dimension in the longitudinal direction L which is greater than the dimension in this same direction of the body 10 so as to protrude on either side of the switching device 1 through the lateral openings 11. In the example illustrated, the conductive portion 40 comprises two guide slots 41 extending here in the longitudinal direction L which are intended to cooperate with longitudinal reliefs 36 (second reliefs) in protrusion on the underside 34 of the piston 30 after the initiation of an initiator 21 or 22. The longitudinal reliefs 36 are, in the first configuration, closer to the conductive portion 40 than the relief 33. The cooperation of the reliefs 36 and slots 41 makes it possible to guide the piston 30 at the time of the rupture of the conductive portion 40 while maintaining it in position, which improves the reliability of the cut.
    The fuse element 50 takes, in the example illustrated, the form of a commercial fuse, that is to say that it is present in an insulating envelope containing a powder of an electrically insulating material. For example, the fusible element 50 may comprise a fusible wire present in a silica powder. The fusible element 50 can be, as in the example illustrated, present outside the body or, as a variant, inside the body, as in the examples of FIGS. 5 to 7 which will be described later. When it is inside the body, the fusible element 50 may be present in the chamber 15 or in a second chamber separate from the latter, as in the example of FIG. 7 which will be described later. The fusible element 50 can, as in the example illustrated here, be attached to the conductive portion 40, or, as a variant, be constituted by a thinned zone of the conductive portion, as in the example of FIGS. 5 and 6 which will be described later.
    The support 60 takes, in the example illustrated, the form of a drawer on which the conductive portion 40 is present. In the example illustrated, the support 60 is configured to maintain the conductive portion in position in the cut-off device 1, for example by providing a corresponding housing therein. The support 60 is here provided with a groove 61 which extends in the transverse direction T and in which the relief 33 is intended to be housed after triggering of one of the pyrotechnic initiators 21 and 22, once the portion conductor 40 has been broken. The groove 61 in the support thus makes it possible to lock the piston 30 in the second position and to ensure a definitive cut off of the conductive portion 40. Notches 62 corresponding to the longitudinal reliefs 36 may be present in the support 60 to accommodate said reliefs 36 when the device 1 reaches the second configuration.
    The operation of the device 1 will now be briefly described in connection with FIGS. 2A-2B and 3A-3B. In FIGS. 2A and 3A, the cut-off device 1 has not yet been triggered and is in the first configuration, corresponding for example to a storage or transport configuration. In this configuration, the piston 30 is in a first position or high position. The conductive portion 40 is intact and a current I (FIG. 3A) can pass through it. Then, two situations can arise. In a first situation which is illustrated in FIGS. 2A-2B and 3A-3B, the current I exceeds the predetermined value or triggering threshold of the fuse element 50 and triggers it (FIG. 3B), generally by melting it, this which has the effect of deflecting all the current towards the first pyrotechnic initiator 21 which then also trips. In a second situation which is not illustrated in the figures, it is the second pyrotechnic initiator 22 which is triggered in response to an external signal emanating for example from a control element Ç (FIG. 4) in response to an anomaly . The triggering of one or the other of the pyrotechnic initiators 21 or 22 then generates a combustion gas which pressurizes the pressurization chamber 14 and sets in motion the piston 30 in the direction Z towards the conductive portion 40. The piston 30 then breaks the conductive portion 40 by impact (FIGS. 2B and 3B) and cuts the current in the cut-off device 1. The cut-off device 1 is then found in the second configuration, the relief 33 of the piston being housed in the groove 61 of the support 60. In all the examples illustrated, the piston 30 breaks the conductive portion by impact with the relief at a region distinct from that where the fusible element is present. In a variant not illustrated, the piston 30 can break the conductive portion by impact with the relief at the level where the fusible element is present, for example when the fusible element constitutes a thinned area of the conductive portion.
    FIG. 4 shows an example of a secure electrical system 100 implementing a cut-off device 1 according to an embodiment of the invention. The secure electrical system 100 comprises a secure supply system 110 comprising a cut-off device 1 (shown very schematically) and a supply circuit 111. The supply circuit 111 here comprises an electric generator G connected at one end of the conductive portion of the switching device 1. The electric generator G can for example be a battery or an alternator. In the breaking device 1, the fuse element 50 is connected in series with the conductive portion 40, and the first pyrotechnic initiator 21 is connected in parallel, via its connectors 21a, to the fuse element 50. The secure supply system 110 further comprises a control element Ç configured to actuate the second pyrotechnic initiator 22 when an anomaly is detected. The control element Ç is connected to the second pyrotechnic initiator 22 via the connectors 22a. The anomaly in response to which the control element Ç can trigger the second initiator 22 may be a non-electric anomaly such as the detection of a shock, for example a sudden deceleration of the control element, of a change temperature, pressure, etc. If an anomaly is detected, the control element Ç is capable of sending an electric current to the second pyrotechnic initiator 22 for its triggering in order to cut the current, as described above. The secure electrical system 100 finally comprises an electrical device D connected to the fuse element 50 of the switching device 1 to be powered by the secure power system 110. For example, a motor vehicle can include a secure electrical system 100.
    The breaking device 1 described above has a single conductive portion 40. However, it is not going beyond the scope of the present invention when the device has several conductive portions, for example two or three conductive portions, which can be broken simultaneously by the relief of the movable cut-off element.
    Figures 5 and 6 respectively show a cutoff device 1 'according to a second embodiment of the invention in longitudinal section and the conductive portion 40 which it comprises. The device 1 ′ differs from the device 1 described above in that the fusible element 50 ′ constitutes a thinned zone of the conductive portion 40, as is better visible in FIG. 6. Electric wires (represented by dotted lines) can thus be provided in the device 1 'to connect the connectors 21a of the first initiator 21 in parallel to the fuse element 50', as illustrated in FIG. 5. The breaking device operates in the same way as the device 1 described above .
    FIG. 7 finally shows a cutting device 1 according to a third embodiment of the invention, in longitudinal section. The device 1 differs from the device 1 described above in that the fusible element 50 is present inside the body 10 and in a second chamber, here constituted by a cavity formed by the opening 12 and delimited by the support 60 , separate from the chamber 15. As previously, electrical wires (shown in dotted lines) can be provided in the device 1 for connecting the connectors 21a of the first initiator 21 in parallel to the fuse element 50, as illustrated in FIG. 7. The switching device 1 operates in the same way as the devices 1 and 1 ′ described above.
    权利要求:
    Claims (13)
    [1" id="c-fr-0001]
    1. Pyrotechnic switching device (1; Γ; 1) comprising a first (21) and a second (22) pyrotechnic initiators, and a body (10) in which are present:
    an electrically conductive portion (40) at least part of which is present in a chamber (15) present in the body, and
    - a movable cut-off element (30) delimiting the chamber and having an electrically insulating relief (33) which faces the conductive portion, the device further comprising a fuse element (50; 50 ') connected in series to the conductive portion (40) and configured to trip when the intensity (I) of the current flowing through it exceeds a predetermined value, the first initiator (21) being connected to the terminals of the fuse element (50) so that '' a triggering of the fuse element activates the first initiator, each initiator (21, 22) being configured to switch the cut-off device from a first current flow configuration to a second current cut configuration, the element movable cutoff (30) being moved towards the conductive portion (40) in order to break it by impact with the relief (33) during the transition from the first to the second configuration.
    [2" id="c-fr-0002]
    2. Device (1; Γ; 1) according to claim 1, in which the movable cut-off element (30) is configured to break the conductive portion by impact with the relief (33) at a zone distinct from that where the fuse element (50; 509 is present during the transition from the first to the second configuration.
    [3" id="c-fr-0003]
    3. Device (Γ; 1) according to claim 1 or 2, wherein the fusible element (50) is present inside the body (10).
    [4" id="c-fr-0004]
    4. Device (1 ') according to claim 3, wherein the fusible element (50) is present in the chamber (15) in which the conductive portion is present.
    [5" id="c-fr-0005]
    5. Device (1) according to any one of claims 1 to 3, in which the fusible element (50) is present in a second chamber present in the body and distinct from the chamber (15) in which the conductive portion is present.
    [6" id="c-fr-0006]
    6. Device (1; 1) according to any one of claims 1 to 5, wherein the fusible element (50) is present in an insulating envelope containing a powder of an electrically insulating material.
    [7" id="c-fr-0007]
    7. Device (1; 1) according to any one of claims 1 to 6, wherein the fuse element (50) is attached to the conductive portion (40).
    [8" id="c-fr-0008]
    8. Device (1 ') according to any one of claims 1 to 4, wherein the fusible element (50) is constituted by a thinned region of the conductive portion (40).
    [9" id="c-fr-0009]
    9. Device (1; 1 '; 1) according to any one of claims 1 to 8, in which the movable cutting element (30) comprises at least one second relief (36) facing the conductive portion (40 ), and the conductive portion has at least one guide slot (41) intended to cooperate with the second relief (36) during the transition from the first to the second configuration, the second relief (36) being, in the first configuration, closer to the conductive portion (40) than the insulating relief (33).
    [10" id="c-fr-0010]
    10. Secure supply system (110) comprising at least:
    - a cut-off device (1; Γ; 1) according to any one of claims 1 to 9,
    a supply circuit (111) connected to the breaking device, the conductive portion (40) being connected to the supply circuit, and
    - a control element (C) configured to activate the second initiator (22) when an anomaly is detected.
    [11" id="c-fr-0011]
    11. The system of claim 10, wherein the anomaly is a non-electrical anomaly.
    [12" id="c-fr-0012]
    12. Secure electrical system (100) comprising a secure supply system (110) according to claim 10 or 11, and a device (D) supplied by said secure supply system.
    5
    [0013]
    13. Electrical installation comprising a secure electrical system (100) according to claim 12.
    类似技术:
    公开号 | 公开日 | 专利标题
    EP3711077B1|2022-01-05|Pyrotechnic switching device
    EP0645275B1|1998-11-25|Safety cutoff device, particularly for vehicles
    CA2793337A1|2011-09-22|Electric circuit breaker with pyrotechnic actuation
    EP3459100B1|2020-03-18|Breaker device intended to be linked to an electrical circuit
    FR3076946A1|2019-07-19|CONTACTOR DEVICE INTEGRATING PYROTECHNIC DISCONNECT CHARACTERISTICS
    FR3051281A1|2017-11-17|ELECTRICAL CUTTING DEVICE AND SECURE ELECTRICAL SYSTEM COMPRISING SUCH A DEVICE
    WO2020099474A1|2020-05-22|Safety device for an electric circuit of a vehicle
    WO1987003735A1|1987-06-18|Anti-theft wire and device for mounting such wire
    EP3391402B1|2019-10-02|Breaking device intended to equip a three-phase circuit
    FR3101478A1|2021-04-02|CONTACTS LEVING TRIP MECHANISMS FOR USE WITH SWITCHING DEVICES INCORPORATING PYROTECHNIC ELEMENTS
    FR2741994A1|1997-06-06|Cut=out device for electrically powered road vehicle
    FR3071659B1|2019-10-11|PYROTECHNIC CUTTING DEVICE
    EP3811392A1|2021-04-28|Pyrotechnic cut-off device
    WO2016001380A1|2016-01-07|Pyrotechnic switch
    FR3071658B1|2019-10-18|PYROTECHNIC DEVICE FOR OPENING A FIRST ELECTRIC CIRCUIT AND CLOSING A SECOND ELECTRIC CIRCUIT
    EP3559970A1|2019-10-30|Pyrotechnic short-circuiter
    FR3071660B1|2019-10-11|PYROTECHNIC CUTTING DEVICE
    FR3071657A1|2019-03-29|PYROTECHNIC CUTTING DEVICE
    FR3085534A1|2020-03-06|PYROTECHNIC CUT-OFF DEVICE
    FR3085225A1|2020-02-28|Passive release mechanisms for use with switching devices incorporating pyrotechnic elements
    FR3060834A1|2018-06-22|PYROTECHNIC SHORT CIRCUIT
    FR3099287A1|2021-01-29|Pyrotechnic cut-off device
    WO2021240104A1|2021-12-02|Cut-off device with plasma chamber
    同族专利:
    公开号 | 公开日
    CN111587469A|2020-08-25|
    US20200279711A1|2020-09-03|
    FR3073664B1|2019-12-06|
    JP2021503160A|2021-02-04|
    EP3711077B8|2022-02-16|
    EP3711077B1|2022-01-05|
    EP3711077A1|2020-09-23|
    WO2019097152A1|2019-05-23|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EP0863528A2|1997-02-28|1998-09-09|Harness System Technologies Research, Ltd.|Electric circuit breaker for vehicle|
    US20050083165A1|2003-10-17|2005-04-21|Tirmizi Abrar A.|Pyrotechnic circuit breaker|
    FR3045204A1|2015-12-15|2017-06-16|Herakles|CUTTING DEVICE FOR EQUIPPING A THREE-PHASE CIRCUIT|EP3840006A1|2019-12-16|2021-06-23|Littelfuse, Inc.|Active and passive fuse module|EP2995822B1|2014-09-09|2019-11-13|Arianegroup Sas|Pyrotechnic actuator|
    EP2996133B8|2014-09-09|2017-08-23|ArianeGroup SAS|Pyrotechnic circuit breaker having an improved structure for accommodating a bus bar, and assembly method thereof|US11239038B2|2015-05-18|2022-02-01|Gigavac, Llc|Mechanical fuse device|
    US20210142969A1|2019-09-27|2021-05-13|Gigavac, Llc|Contact levitation triggering mechanisms for use with switching devices incorporating pyrotechnic features|
    AT524104A1|2020-07-15|2022-02-15|Hirtenberger Automotive Safety Gmbh & Co Kg|Pyrotechnic current disconnector|
    法律状态:
    2018-11-22| PLFP| Fee payment|Year of fee payment: 2 |
    2019-05-17| PLSC| Publication of the preliminary search report|Effective date: 20190517 |
    2019-11-21| PLFP| Fee payment|Year of fee payment: 3 |
    2020-11-20| PLFP| Fee payment|Year of fee payment: 4 |
    2021-11-22| PLFP| Fee payment|Year of fee payment: 5 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1760702|2017-11-14|
    FR1760702A|FR3073664B1|2017-11-14|2017-11-14|PYROTECHNIC CUT-OFF DEVICE|FR1760702A| FR3073664B1|2017-11-14|2017-11-14|PYROTECHNIC CUT-OFF DEVICE|
    US16/763,631| US20200279711A1|2017-11-14|2018-11-13|Pyrotechnic switching device|
    EP18819186.0A| EP3711077B8|2017-11-14|2018-11-13|Pyrotechnic switching device|
    CN201880073434.0A| CN111587469A|2017-11-14|2018-11-13|Firework switching device|
    JP2020526441A| JP2021503160A|2017-11-14|2018-11-13|Pyrotechnic switching device|
    PCT/FR2018/052819| WO2019097152A1|2017-11-14|2018-11-13|Pyrotechnic switching device|
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