EP3811392A1 - Dispositif de coupure pyrotechnique - Google Patents
Dispositif de coupure pyrotechniqueInfo
- Publication number
- EP3811392A1 EP3811392A1 EP19734851.9A EP19734851A EP3811392A1 EP 3811392 A1 EP3811392 A1 EP 3811392A1 EP 19734851 A EP19734851 A EP 19734851A EP 3811392 A1 EP3811392 A1 EP 3811392A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- relief
- cutoff
- face
- piston
- configuration
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H39/00—Switching devices actuated by an explosion produced within the device and initiated by an electric current
- H01H39/006—Opening by severing a conductor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D15/00—Shearing machines or shearing devices cutting by blades which move parallel to themselves
- B23D15/12—Shearing machines or shearing devices cutting by blades which move parallel to themselves characterised by drives or gearings therefor
- B23D15/14—Shearing machines or shearing devices cutting by blades which move parallel to themselves characterised by drives or gearings therefor actuated by fluid or gas pressure
- B23D15/145—Shearing machines or shearing devices cutting by blades which move parallel to themselves characterised by drives or gearings therefor actuated by fluid or gas pressure actuated by explosion
Definitions
- the present invention relates to the general field of electrical cut-off devices, and more particularly those of the pyrotechnic type.
- Pyrotechnic breaking devices comprising a body in which there is present a pyrotechnic initiator configured for, when triggered, set in motion a piston provided with a relief in the direction of a conductive bar to be sectioned.
- WO 2016/038043 and WO 2016/038050 show examples of devices of this type.
- FR3017240 shows a cut-off device which cuts a three-part conductive bar with two cutting portions present on a movable piston.
- the device described proposes to reduce the occurrence of electric arcs at the time of cutting with an ablative material whose removal increases the arc forming voltage.
- Such a device is complex to achieve.
- the invention proposes for this purpose a pyrotechnic breaking device comprising: a first pressurizing chamber in communication with an output of a pyrotechnic initiator,
- a second chamber delimited by a support on which is present a conductive portion extending in a first direction, the support defining a first and a second housing separated and spaced apart from one another along the first direction, and
- a piston separating the first chamber from the second chamber, the piston comprising a first and a second protruding relief protrusion located respectively facing the first and the second housing.
- the pyrotechnic initiator is configured to pass the cutoff device from a first current flow pattern to a second current cutoff configuration, the piston being set in motion upon transition from the first to the second configuration to break the conductive portion by impact with the cut reliefs, each cutoff relief having, in the second configuration, a face in contact with the support.
- the piston further comprises an additional relief projecting between the first and second cutoff reliefs
- the support further comprises a third housing facing the additional relief between the first and the second housing, the additional relief being, in the second configuration, present in the third housing.
- the breaking device comprises at least two cutting reliefs which can cut the conductive portion into at least three distinct parts.
- the breaking device comprises at least two cutting reliefs which can cut the conductive portion into at least three distinct parts.
- the additional relief may have a triangular section.
- the additional relief may have a rectangular section, or another shape.
- the third housing may have a section adapted to the shape of the additional relief.
- the face of each cutoff relief may be in contact with a wall of a corresponding housing.
- the contact between the face of each cutoff relief and the support may be a surface contact, to further improve the seal and reduce the risk of arcing .
- the cut-off device may comprise a body in which are present the first and the second chamber, the pyrotechnic initiator, the support, and the piston.
- the body, the piston and the support may be of an electrically insulating material.
- the support may take the form of a drawer inserted into a housing present in the body.
- the body may include a lower opening through which the plunger can be inserted into the body.
- the first and second reliefs, and the additional relief may extend in a second direction transverse to the first direction, for example along a width of the conductive portion.
- the conductive portion may be cut into three distinct portions during the passage of the cutoff device from the first to the second configuration.
- the conductive portion may have, in the first configuration, a first and a second zone of reduced thickness located respectively opposite the first and second relief.
- Each zone may be a groove formed in the conductive portion in a direction transverse to the first direction, for example according to the width of the conductive portion.
- Such grooves may be present on one face of the conductive portion facing the piston, or on a face thereof opposite the piston.
- the additional relief may be centered with respect to the first and second cutoff reliefs.
- each relief may extend from a lower face of the piston, the additional relief extending from said face to a smaller distance than that over which the first and second extend. cut reliefs from said face.
- each relief may extend from a lower face of the piston, the additional cutoff relief extending from said face over a greater distance than that over which extend the first and second cutoff reliefs from said face. This arrangement further increases the distance between the cut portions of the conductive portion in the second configuration, further reducing the risk of forming an electric arc.
- each relief may extend from a lower face of the piston, the additional relief extending from said face a distance substantially equal to that on which s' extend the first and second cutoff reliefs from said face.
- the conductive portion may comprise at least one opening facing the additional relief, and the additional relief may comprise at least one projecting lug cooperating with said opening during the passage from the first to the second configuration.
- the openings and the lugs may have a section of rectangular shape. This lug and this opening keep the conductive portion in position in the first direction during and after the cut, which further improves the cut. It should be noted that these advantages are even greater when the additional relief extends from the face of the piston over a larger length than that on which extend the first and second reliefs from said face.
- each cutoff relief in the first configuration, can be inclined with respect to an axis of movement of the piston, and the first and second housing each comprise a wall intended to be in contact with a corresponding face.
- first or second cutoff relief said wall being inclined with respect to the axis of displacement. The inclination of the walls and faces increases the contact area between the reliefs and the housing, and therefore the total distance between the cut portions, which further reduces the risk of arcing.
- each cutoff relief in the first configuration, may be parallel to an axis of movement of the piston, and the first and second housing each comprise a wall intended to be in contact with a corresponding face of the first or the second cutoff relief, said wall being parallel to the axis of displacement.
- the piston can come on the support, which keeps the piston in the second configuration and further reduces the appearance of electric arc by increasing the contact area between the reliefs and the housing.
- each cutoff relief in the first configuration, may be parallel to an axis of movement of the piston, and the first and second housing each comprise a wall intended to be in contact with a corresponding face of the first or the second cutoff relief, said wall being inclined with respect to the axis of displacement.
- the piston can deform slightly to come hang on the support, which keeps the piston in the second configuration and further reduces the appearance of electric arc by increasing the contact area between the reliefs and the housing .
- the first and second housing may each comprise a wall intended to be in contact with a corresponding face of the first or second cutoff relief, said wall and / or said face having a shoulder.
- the wall and / or face may comprise a step or be stepped so as to have a flange.
- FIG. 1 is an exploded perspective view of a cut-off device according to a first embodiment of the invention
- FIG. 2 is a perspective bottom view of the piston of the cut-off device of FIG. 1;
- FIGS. 3A and 3B show the cut-off device of FIG. 1 in section along the plane II, respectively in the first and in the second configuration
- FIG. 4 shows a section along an IV plane perpendicular to the section plane of FIGS. 3A and 3B passing through the additional relief
- FIGS. 5A and 5B show sections of a breaking device according to a second embodiment of the invention, respectively in the first and in the second configuration
- FIGS. 6A and 6B show sections of a breaking device according to a third embodiment of the invention, respectively in the first and in the second configuration
- FIGS. 7A and 7B show sections of a cut-off device according to a fourth embodiment of the invention, respectively in the first and in the second configuration
- FIGS. 8A and 8B show sections of a breaking device according to a fifth embodiment of the invention, respectively in the first and in the second configuration, and
- FIG. 9 schematically shows an example of an electrical installation comprising a breaking device according to the invention. Detailed description of the invention
- the cut-off device 100 according to a first embodiment illustrated in FIGS. 1 to 3B comprises: a body 10, a pyrotechnic initiator 20, a piston 30, a conductive portion 40 and a support 50.
- the direction longitudinal L corresponds to the direction in which extends the conductive portion 40
- the transverse direction T is perpendicular to this direction in the plane containing the conductive portion 40.
- the device 100 comprises a first 41 and a second 42 electrical terminals intended to be connected to an electrical circuit to cut, for example in a secure electrical installation 600 ( Figure 10).
- the conductive portion 40 takes the form of a flat tongue or conductive bar. The conductive portion 40 extends between the first terminal 41 and the second terminal 42.
- the body 10 has a here generally parallelepipedic shape.
- the body 10 comprises a lateral opening 11 through which the support 50 is intended to be inserted inside the body 10, a generally circular lower opening 12 through which the piston 30 is intended to be inserted inside the body 10, and an upper opening 13 projecting from an upper face of the body 10 through which the initiator 20 is intended to be inserted inside the body 10.
- the lateral opening 11 extends in the longitudinal direction L inside the body 10 to form a housing in which the support 50 is held in the body 10.
- the pyrotechnic initiator 20 comprises two conductive elements 21 configured to initiate a pyrotechnic charge 22 to which they are connected.
- the pyrotechnic charge 22 is, when it is initiated for example by means of a current flowing through the conductive elements 21, capable of generating a pressurizing gas by its combustion.
- the conductive elements 21 may be connected to a control device C (FIG. 10) configured to actuate the pyrotechnic initiator 20 when an anomaly is detected in an electrical circuit.
- the piston 30 is, in this example, of cylindrical shape and centered on a vertical axis Z. The axis Z corresponds here to the axis of displacement of the piston 30.
- the piston 30 comprises a circumferential groove 31 in which a seal of sealing 32, for example an O-ring, is intended to be housed.
- the piston 30 can move along the Z axis inside the body 10 between a high position (first position, device in the first configuration), as in Figure 3A, and a low position (second position, device in the second configuration), as in Figure 3B.
- first position first position, device in the first configuration
- second position second position, device in the second configuration
- the piston 30 is held in the up position.
- the piston 30 may have a shape different from that illustrated, adapted to the shape of the cavity inside the body.
- the body 10 comprises a first pressurizing chamber 14 in communication with an output S of the pyrotechnic initiator 20, and a second chamber 15 in which the conductive portion 40 is present.
- the piston 30 separates the first chamber 14 of the second chamber 15 hermetically by means of the seal 32.
- the piston 30 comprises a lower face 33 from which protrude a first cutoff relief 34 and a second cutoff relief 35.
- the cutoff reliefs 34 and 35 are located facing the conductive portion 40.
- the cutoff reliefs 34 and here they extend in the transverse direction T, or in other words, according to the width of the conductive portion 40.
- the cutoff reliefs 34 and 35 extend to the edges of the the face 33 of the piston 40.
- the relief reliefs 34 and 35 extend here from the face 33 of the piston 30 over an equal distance so as to come into contact with the conductive portion 40 simultaneously after tripping.
- the support 50 takes, in the illustrated example, the shape of a drawer on which the conductive portion 40 is present. In the illustrated example, the support 50 is configured to hold the conductive portion 40 in position in the device 100.
- the support 50 here comprises a first housing 51 and a second housing 52 which are, in the first configuration (FIG. respectively facing the first cutoff relief 34 and the second cutoff relief 35.
- the housings 51 and 52 here extend in the transverse direction T and form grooves.
- the housings 51 and 52 are intended to accommodate the cutoff reliefs 34, 35 and the ends 41a, 42a (FIG. 3B) of the cut portions of the conductive portion 40 when the device 100 is in the second configuration.
- the first 51 and the second 52 housings are spaced along the direction L by a distance el, corresponding to the distance separating the faces 51a and 52a measured at the level of the upper face of the support 50.
- the distance el can be at least 2 mm, or even more preferably at least 10 mm.
- the distance el may for example be equal to at least one third of the length L1 of the portion of the conductive portion present in the second chamber 15.
- Each cutoff relief 34, 35 has a face 34a, 35a located opposite the axis of displacement Z of the piston 30.
- the faces 34a and 35a are located facing each other in the first configuration.
- Each housing 51, 52 has a first wall 51a, 52a and a second wall 51b, 52b facing one another.
- the faces 34a and 35a and the walls 51a, 52a, 51b and 52b are here planar.
- the faces 34a and 35a of the reliefs 34 and 35 are inclined with respect to the Z axis, in particular they move away from the Z axis when one moves away from the lower face 33.
- the walls 51a and 52a of the housings 51 and 52 are also inclined with respect to the Z axis, in particular they move away from the Z axis when one approaches the bottom of the housing 51, 52.
- the conductive portion has two grooves 43 and 44, constituting areas of reduced thickness located respectively opposite the first 34 and second 35 reliefs cut.
- the grooves 43 and 44 facilitate cutting by creating a zone of weakness in the conductive portion 40.
- the piston 30 of the device 100 further comprises an additional relief 36 projecting on its lower face 33 between the first 34 and second relief 35 reliefs
- the support 50 further comprises a third housing 53 located opposite additional relief 36 between the first 51 and second 52 dwellings.
- the additional relief 36 extends in a manner similar to the reliefs 34 and 35 in the transverse direction T and substantially from one edge to the other of the face 33 of the piston 30.
- the additional relief 36 and here centered with respect to the first 34 and second 35 reliefs of cut, and in particular centered on the axis Z.
- the relief additional 36 extends here from the face 33 of the piston 30 over a distance dl greater than the distance d2 on which extend the first and second relief cutouts 34 and 35 from said face 33.
- the additional relief 36 has a triangular section.
- the third housing 53 has a shape complementary to that of the additional relief 36 and is designed to accommodate the additional relief 36 and the cut central portion 45 of the conductive portion 40 when the device 100 is in the second configuration ( Figure 3B). Indeed, during the passage from the first to the second configuration, the additional relief 36 carries with it the cut central portion 45 in the third housing 53 and holds it there. As can be seen in FIG. 3B, the cut central portion 45 is folded and further removed from the other cut portions relative to the device 100, so as to provide a more reliable cut and further reduce the occurrence of arcing.
- the additional relief 36 of the device 100 further has two lugs 36a, here substantially square ( Figures 2 and 4), which project on the end of the additional relief 36 and which are distributed thereon.
- the lugs 36a are, in the first configuration, located opposite apertures 45 (FIG. 1) of complementary shapes present in the conductive portion 40.
- the lugs 36a and the openings 45 cooperate to maintain the conductive portion 40 in position in the device.
- FIGS. 3A and 3B show longitudinal sectional views, that is to say in a plane containing the direction L and the axis Z.
- FIG. the device 100 in the first configuration (piston in the first position or high position), that is to say before triggering the pyrotechnic initiator 20.
- the chamber 14 is pressurized by the gases resulting from the combustion of the pyrotechnic charge 22, the piston 30 moves towards the conductive portion 40 along the Z axis until the cutoff reliefs 34 and 35 impinge on the conductive portion 40.
- the additional relief 36 has already come into contact with the conductive portion 40 and its lugs 36a are engaged in the openings 45. In this way, the conductive portion 40 is held in position and begins to be folded. Then, the simultaneous impact of the cutoff reliefs 34 and 35 with the conductive portion 40 intersects it in several distinct parts, here three distinct parts: two parts connected to the terminals 41 and 42, and a central portion 45 isolated from the other two . An electric current can no longer circulate between the terminals 41 and 42.
- the cut portions connected to the terminals 41 and 42 each have an end 41a, 42a folded into a housing 51.
- the relief reliefs 34 and 35 are, in the second configuration, respectively housed in the housings 51 and 52.
- the central portion 45 is isolated from the other cut parts, it is then folded and wedged in the third housing 53 by the additional relief 36.
- the faces 34a and 35a of the piston 30 are respectively in contact with the walls 51a and 52a of the housings 51 and 52.
- the contact between the faces 34a and 35a and the walls 51a and 52a is thus a surface contact. This contact provides a seal that reduces the risk of arcing.
- the cutoff device 100 described above has a single conductive portion 40. However, it is not 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 reliefs. cutoff 34 and 35.
- FIGS. 5A and 5B show a cut-off device 200 according to a second embodiment similar to the cut-off device 100 previously described. Unless mentioned otherwise, the corresponding reference signs between the first and second embodiments designate identical characteristics.
- the operating principle of the cut-off device 200 is identical to that of the device 100. With respect to the cut-off device 100, in the cut-off device 200, the distance d1 is smaller than the distance d2. In this example, the cut is made before the additional relief 36 comes into contact with the conductive portion 40.
- Figures 6A and 6B show a cutoff device 300 according to a third embodiment similar to the cutoff device 100 described above. Unless mentioned otherwise, the corresponding reference signs between the first and third embodiments designate identical characteristics.
- the operating principle of the cut-off device 300 is identical to that of the device 100.
- the faces 34a and 35a of the first 34 and second 35 cut-off reliefs of the piston 330, as well as that the walls 51a and 52a of the housings 51 and 52 are parallel to the axis of displacement Z.
- the reliefs 34, 35 and the housings 51, 52 are sized so that the walls 51a, 52a come into contact with the faces 34a, 34b in the second position to lock the piston 30.
- the walls 51a, 52a and the corresponding faces 34a, 34b are here in surface contact, which allows a seal and further reduces the risk of occurrence of an electric arc.
- FIGS. 7A and 7B show a cut-off device 400 according to a fourth embodiment similar to the cut-off device 100 previously described. Unless mentioned otherwise, the corresponding reference signs between the first and fourth embodiments designate identical characteristics.
- the operating principle of the cut-off device 400 is identical to that of the device 100.
- the faces 34a and 35a of the piston 30 are parallel to the axis of displacement Z. in the device 100, the walls 51a and 52a of the housings 51 and 52 are inclined relative to the axis of displacement Z.
- the cutoff reliefs 34 and 35 may thus deform slightly outwardly with respect to the Z axis during the passage in the second configuration ( Figure 9B) to better block the piston and further improve the reliability of the cut.
- FIGS. 8A and 8B show a cut-off device 500 according to a fifth embodiment similar to the cut-off device 100 described above. Unless mentioned otherwise, the corresponding reference signs between the first and fifth embodiments designate identical characteristics.
- the Principe ofsolutionment of the cut-off device 500 is identical to that of the device 100.
- the faces 34a and 35a of the piston 30 are parallel to the axis of displacement Z, and each wall 51a, 52a of the housings 51 and 52 has a shoulder 51c, 52c.
- the shoulder corresponds, in other words, to a step. With such a shoulder, each wall concerned is staged.
- the shoulders 51c and 52c are here such that a distance d3 separating the walls 51a and 52a at the upper portions thereof (i.e., near the second chamber) is less than the distance d4. separating the walls 51a and 52a at the lower portions thereof (i.e. near the bottom of a housing).
- the distance d3 is less than or substantially equal to the distance separating the faces 34a and 35a of the first 34 and second 35 cutoff reliefs.
- the shoulders 51c and 52c are present on the walls 51 and 52 at a height h, measured from the bottom of a housing, greater than or equal to half the total depth P of a housing.
- the cutoff reliefs 34 and 35 intersect the conductive portion 40, enter the respective housings 51 and 52 without being impeded by the walls 51a, 52a at the beginning of their course (over a distance Ph), then are blocked by contact with the lower parts of the walls 51a, 52a (located after the shoulders 51c, 52c in the direction of movement of the piston 30).
- the first 34 and second 35 cutoff reliefs are deformed in the second configuration.
- the shoulders 51c, 52c may be present on the faces 34a, 35a of the cut reliefs 34, 35 of the piston 30.
- FIG. 9 schematically shows an example of a secure electrical installation 600 implementing a cut-off device 100 according to the invention.
- the secure electrical installation 600 comprises a secure power supply system 610 comprising a cutoff device 100 (shown very schematically) and a supply circuit 111.
- the supply circuit 111 here comprises an electric generator G connected to the first terminal 41 of the conductive portion 40 of the cut-off device 100.
- the electric generator G may be for example a battery or an alternator.
- the secure power system 110 further includes a control element configured to actuate the pyrotechnic initiator 22 when an abnormality is detected.
- the control element £ is connected to the pyrotechnic initiator 22 via the connectors 21.
- the anomaly in response to which the control element £ can trigger the second initiator 22 may be an electrical anomaly, such as an overshoot current threshold in the circuit, or a non-electrical anomaly such as the detection of a shock, for example a sudden deceleration of the control element, a change in temperature, pressure, etc.
- the control element £ is connected to the supply circuit for measuring the current and detecting the exceeding of a current threshold.
- control element £ is able to send an electric current to the pyrotechnic initiator 22 for its release in order to cut off the current, as previously described.
- the secure electrical installation 600 finally comprises an electrical device D connected to the second terminal 42 of the electrical portion 40 of the cut-off device 100 to be powered by the secure power supply system 110.
- a motor vehicle can include a secure electrical installation 600.
Landscapes
- Fuses (AREA)
- Switch Cases, Indication, And Locking (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1854210A FR3081255B1 (fr) | 2018-05-21 | 2018-05-21 | Dispositif de coupure pyrotechnique |
PCT/FR2019/051147 WO2019224469A1 (fr) | 2018-05-21 | 2019-05-21 | Dispositif de coupure pyrotechnique |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3811392A1 true EP3811392A1 (fr) | 2021-04-28 |
Family
ID=65031203
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19734851.9A Pending EP3811392A1 (fr) | 2018-05-21 | 2019-05-21 | Dispositif de coupure pyrotechnique |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3811392A1 (fr) |
FR (1) | FR3081255B1 (fr) |
WO (1) | WO2019224469A1 (fr) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3111008B1 (fr) * | 2020-05-28 | 2022-09-23 | Arianegroup Sas | Dispositif de coupure à chambre plasma |
FR3117665B1 (fr) * | 2020-12-10 | 2023-04-14 | Arianegroup Sas | Dispositif de coupure à accroissement diélectrique |
CN113223905B (zh) | 2020-12-11 | 2024-01-19 | 西安中熔电气股份有限公司 | 一种熔断兼机械力断开熔体式熔断器 |
KR102576050B1 (ko) | 2020-12-11 | 2023-09-06 | 시안 시노퓨즈 일렉트로닉, 코.,엘티디. | 기계적 파단 및 용단이 조합된 다중 파단구 여기 퓨즈 |
CN112447463A (zh) * | 2020-12-11 | 2021-03-05 | 西安中熔电气股份有限公司 | 一种分组断开的多断口激励熔断器 |
AT524533B1 (de) * | 2021-04-29 | 2022-07-15 | Astotec Automotive Gmbh | Pyrotechnischer Stromtrenner |
CN116130306A (zh) * | 2021-11-12 | 2023-05-16 | 森萨塔科技(常州)有限公司 | 断路器 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ATE380328T1 (de) * | 2003-02-04 | 2007-12-15 | Delphi Tech Inc | Pyromechanisches trennelement |
FR3017240B1 (fr) | 2014-02-04 | 2016-01-29 | Ncs Pyrotechnie Et Tech Sas | Coupe-circuit pyrotechnique |
EP2995822B1 (fr) | 2014-09-09 | 2019-11-13 | Arianegroup Sas | Actionneur pyrotechnique |
EP2996133B8 (fr) | 2014-09-09 | 2017-08-23 | ArianeGroup SAS | Coupe-circuit pyrotechnique comprenant une structure améliorée pour recevoir une barre omnibus et son procédé d'assemblage |
JP6344312B2 (ja) * | 2015-05-29 | 2018-06-20 | 豊田合成株式会社 | 導通遮断装置 |
JP6406189B2 (ja) * | 2015-09-11 | 2018-10-17 | 豊田合成株式会社 | 導通遮断装置 |
-
2018
- 2018-05-21 FR FR1854210A patent/FR3081255B1/fr active Active
-
2019
- 2019-05-21 WO PCT/FR2019/051147 patent/WO2019224469A1/fr unknown
- 2019-05-21 EP EP19734851.9A patent/EP3811392A1/fr active Pending
Also Published As
Publication number | Publication date |
---|---|
FR3081255B1 (fr) | 2020-05-29 |
WO2019224469A1 (fr) | 2019-11-28 |
FR3081255A1 (fr) | 2019-11-22 |
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