Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
  • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
  • H01R13/02—Contact members
  • H01R13/193—Means for increasing contact pressure at the end of engagement of coupling part, e.g. zero insertion force or no friction
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
  • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
  • H01R13/46—Bases; Cases
  • H01R13/53—Bases or cases for heavy duty; Bases or cases for high voltage with means for preventing corona or arcing
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
  • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
  • H01R13/62—Means for facilitating engagement or disengagement of coupling parts or for holding them in engagement
  • H01R13/622—Screw-ring or screw-casing
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
  • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
  • H01R13/648—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding  
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
  • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
  • H01R4/28—Clamped connections, spring connections
  • H01R4/48—Clamped connections, spring connections utilising a spring, clip, or other resilient member

Definitions

• the invention relates to an accessory, in particular of the "backshell” type, a term that can be translated as “shield cover”, intended to be assembled to a connector.
• an accessory in particular of the "backshell” type, a term that can be translated as “shield cover”, intended to be assembled to a connector.
• Such an accessory is in particular for fixing one or more electrical cables on the connector.
• an accessory comprises a main body of substantially cylindrical general shape and a locking nut locked axially relative to the main body by means of a retention ring.
• the nut is intended to be fixed on a thread of a circular connector.
• these parts are also conventionally provided with teeth capable of penetrating each other during the axial approximation caused by the screwing of the nut on the connector.
• an accessory intended to be assembled to a connector along an assembly axis D, comprising: a main body, and at least one deformable contact element comprising a first part, called “Contact portion”, intended to exert, after assembly of the accessory to said connector, a pressure on an electrically conductive surface of said connector and a second portion intended to be in contact, after assembly of the accessory to said connector, with said body main, said contact element being adapted to provide an electrical connection between said parts.
• the accessory according to the present invention is remarkable in that it further comprises pressure means capable of deforming the contact element so as to increase said pressure exerted by the contact part.
• the accessory according to the invention may thus comprise a contact element which does not oppose, or little, the axial approximation of the main body of the accessory and the connector.
• the axial force that must exert the operator during the assembly of the connector and the accessory remains low.
• the pressure on the conductive surface of the connector exerted by the contact element is not limited to that resulting from its elasticity.
• the pressure means make it possible to push the contact part. By determining the conditions under which the pressure means will exert this thrust, it thus becomes possible to guarantee a higher contact pressure without this pressure making it more difficult to couple the accessory to the connector.
• the accessory according to the invention may also comprise one or more of the following optional features:
• the accessory is an accessory of the type "shield hood” for assembly with a circular connector.
• An accessory of the "shielding hood” type is a housing positioned at the rear of a connector and ensuring the mechanical maintenance of cables, the electromagnetic shielding of the cables and the electrical continuity.
• the pressure means are able to move said contact portion towards the axis D.
• said pressure can be exerted substantially radially, in particular towards the axis A, so that the contact part can bear on a lateral surface of the connector.
• the pressure means can be activated by actuating radial locking means of the main body relative to the connector, for example for screwing a fastening nut, and / or by axial approximation of the accessory and the connector.
• the pressure means are adjustable.
• the pressure of the contact portion on the conductive surface of the connector is thus modifiable.
• the contact element may be of electrically conductive material or at least partially covered with a layer of such material.
• the contact element comprises a portion covering, at least in part, the main body of the accessory and / or a portion extending beyond the main body, substantially opposite said contact portion.
• the contact element comprises a shielding portion covering the main body of the accessory over its entire length.
• Said contact portion is carried by a tab, preferably elastic.
• the tab can extend substantially axially, in particular substantially along a notional cylinder of axis D.
• the tab can be extended by a base extending in a substantially transverse plane, that is to say perpendicular to the axis D
• the base may itself extend, on the opposite side to the tab, by a substantially axial portion.
• the substantially axial portion forms a shielding sleeve of the main body. This sleeve, for example a sheet metal part, preferably extends axially throughout the main body of the accessory.
• the contact element constitutes a shielding of the main body
• the latter can advantageously be made of an electrically insulating material, no electrical conductivity being no longer necessary.
• the main body can then be made of a thermoplastic material.
• the accessory comprises a plurality of said tabs, preferably extending substantially parallel to each other, and, more preferably, secured to each other by a common base.
• the number of legs is variable depending on the diameter of the connectors.
• the tabs are distributed substantially equiangularly about the axis D, that is to say that the pitch between the tabs is substantially constant.
• the pitch "p" between two successive legs is between 1 and 5 mm (see Figure 1).
• Legs and base common may thus constitute an axial alignment bracelet in which the connector may be introduced axially against the centripetal force exerted by the elastic tabs.
• the accessory comprises a ring adapted to cooperate with the main body to clamp or "pinch" the contact element, and in particular, where appropriate, the base of a leg or the common base solidarisant said each other paws.
• the ring and the contact element are shaped so that said contact element is pinched, between the ring and the main body, exclusively at the base of said tab or said common base.
• the base of a leg or the common base does not necessarily extend in a substantially transverse plane, any other configuration being possible provided that, preferably, the nip of said base or said common base between the ring and the main body allows elastic support on the electrically conductive surface of the connector. Such an elastic support constantly brings back said one or more tabs towards the support position, which advantageously confers great reliability on this support.
• the ring comprises means for coupling in rotation, about the axis D, of said connector relative to the main body.
• the ring then constitutes an "anti-rotation" ring.
• the rotational coupling means may in particular comprise teeth and / or tenons.
• the teeth and / or tenons are oriented axially.
• the tenons can be shaped to penetrate in complementary housing formed in the main body.
• the ring can be electrically conductive. It is preferably an electrically insulating material, for example a composite material.
• the risk of electric arc between the teeth of the connector and complementary teeth of the ring cooperating with said teeth of the connector to ensure said coupling rotation is then removed.
• the accessory and / or the connector comprises radial blocking means which can be shaped so as to bring the main body and the connector axially closer together.
• the radial locking means may for example comprise a nut, locked axially on the main body or whose axial displacement along the main body is limited, adapted to cooperate with a thread of the connector.
• a screw / nut system also makes it possible to ensure axial locking of the main body with respect to the connector.
• the axial locking of the radial blocking means can be ensured by means of an elastic retention ring extending for example partly in each of two annular grooves opposite, formed in the nut and the main body.
• the annular grooves may be shaped to allow limited axial displacement of the retention ring.
• the accessory comprises resilient return means, for example a corrugated washer inserted into an annular groove, capable of ensuring an automatic retraction, towards the main body, radial locking means, in particular of the nut during its separation ( unscrewing) of the connector.
• resilient return means for example a corrugated washer inserted into an annular groove, capable of ensuring an automatic retraction, towards the main body, radial locking means, in particular of the nut during its separation ( unscrewing) of the connector.
• the ring and the main body are shaped so that said nip can deform the contact element in a manner tending to increase said pressure exerted by said contact portion.
• said pressure is centripetal, that is to say has a component oriented towards the axis D
• the deformation may for example tend to move said contact portion towards the axis D.
• the ring and the main body may for example have, in cross section, convex and concave shapes, respectively. Any shape allowing the pinch to cause a rotation of the tab towards the axis D would however be appropriate.
• the contact element and the radial locking means are shaped so that a displacement, for example axial and in the direction of the connector, of the radial blocking means relative to the main body causes the radial blocking means to push the contact portion of the electrical contact element in a direction tending to increase said pressure exerted by said contact portion.
• the invention also relates to a connection assembly comprising a connector, for example circular, and an accessory intended to be assembled to this connector.
• This assembly is remarkable in that the accessory is in accordance with the invention.
• connection set may further include one or more of the following optional features:
• the accessory may have one or more of the optional features mentioned above.
• the teeth of the ring of the accessory are then preferably shaped to cooperate with complementary teeth of the connector so as to block a rotation about the axis D of the connector relative to the main body.
• the pressure means can be activated only at the end of radial and / or axial locking of the connector relative to the accessory. Such a radial blockage can result in particular from the initial introduction of the connector in the accessory during assembly, for example by complementarity of form or implementation of a bracelet ensuring axial alignment of these parts.
• the activation of the pressure means does not interfere with this introduction and therefore does not increase the axial force that the operator must exert for this purpose.
• the connector is an electrically conductive material, or at least partially, preferably completely, covered with a layer of such material.
• the conductive surface on which bears the contact portion is a lateral surface.
• the radial locking means of the accessory are preferably shaped so that their activation can cause said pinching of said base between the ring and the main body of the accessory by pressure of the connector on the ring, said nip deforming the contact element in a manner tending to create and / or increase said pressure exerted by said contact portion.
• the radial locking means of the accessory on the connector are movable relative to the main body, after the ring is in abutment with the connector.
• the contact element and the radial locking means are shaped so that a displacement of the radial locking means relative to the main body, for example along the axis D and in the direction of the connector, leads the radial locking means to push towards the axis D at least the contact portion, while the ring remains in abutment on the connector.
• This displacement of the blocking means may preferably allow adjustment of the pressure of the pressure means on the electrical contact element, and therefore an adjustment of the pressure exerted by the electrical contact element on the lateral contact surface of the connector. .
• the invention also relates to a method of assembling an accessory to a connector, the accessory comprising at least one deformable contact element of which at least one electrical contact portion can be arranged facing a surface electrically conductive, for example lateral, connector, the method comprising the following steps: a) positioning of the accessory and the connector so that said contact portion is facing said conductive surface of the connector; b) increasing a pressure, possibly initially zero, tending to push the contact portion towards said conductive surface.
• This method may further include one or more of the following optional features:
• Step b) is performed after step a).
• Step b) can then be performed by activating means of pressure of the accessory so as to ensure a minimum pressure of the contact portion on said conductive surface of the connector.
• the contact portion is carried by a tab extended by a base interposed between a ring, preferably an anti-rotation ring, and a main body of the accessory, the surfaces of the ring and the main body being, at said base, shaped so that a pinch of said base between these surfaces causes a deformation tending to push the contact portion to the conductive surface of the connector.
• step b) preferably after abutment of the ring on the connector, said pinching is caused, for example by forcing an axial connection between said ring and the main body, in particular by screwing, on the connector, a nut locked axially with respect to the main body.
• step b) a nut is screwed onto the connector so that the displacement of the nut towards the connector causes it to push the contact portion towards the conductive surface. .
• this thrust does not begin until the connector has been immobilized axially relative to the accessory.
• Figure 1 shows, in perspective, an exploded view of an assembly according to the invention, according to a first embodiment
• Figure 2 shows, in longitudinal section, an assembly according to a first embodiment of the invention
• Figure 3 shows, in longitudinal section, a variant of the first embodiment of an assembly according to the invention
• Figures 4a and 4b show, in longitudinal section, an assembly according to the invention in a second embodiment, before and after activation of the pressure means, respectively.
• references are chosen identical to designate identical or similar members. In the second embodiment, however, they are assigned a prime sign.
• axially means “along the D axis”.
• Side surface means a surface extending substantially parallel to the assembly axis of the connector and the accessory.
• radial blocking means of the main body with respect to a connector means means capable of preventing any relative displacement between these two parts in a direction perpendicular to the assembly axis D, that is to say to say means allowing only a relative displacement along this axis.
• the axis of assembly is the principal direction followed by the connector and the accessory during their assembly. Conventionally, this axis coincides, during assembly, with the longitudinal axis of the connector and with that of the accessory.
• deformable contact element is meant a contact element that can be deformed by hand, visibly to the naked eye.
• the contact element comprises a tab of which one end is free and the other is fixed to a base. It is then considered that the contact element is deformable when the possible displacement of the free end, by manual deformation, is greater than 5%, preferably about 10% of the distance between the two ends of the tab.
• a first embodiment is shown in Figures 1 and 2.
• the accessory 10 shown has a main body 20 which has a generally tubular shape, substantially circular base.
• the central cavity 21 of the main body 20 is intended to receive the end of one or more electric cables, not shown.
• the main body 20 may be of a conductive material or be covered with a layer of conductive material.
• annular groove 22 is formed at the outer lateral surface of the main body 20.
• the edge 24 of the main body 20, on the C side, comprises a plurality of housings 25.
• the groove 22 is intended to receive a retaining ring 40.
• the retaining ring 40 is interrupted and has sufficient elasticity to be deformed when it is placed in the annular groove 22, then to return substantially to its shape. initial.
• the retaining ring 40 has an outer diameter greater than the outer diameter of the main body 20 in the immediate vicinity of the annular groove 22, and an inner diameter less than this diameter.
• the inside diameter of the retention ring 40 is, however, greater than the diameter of the main body at the bottom of the annular groove 22. The retention ring 40 can thus be retracted provisionally and elastically within the groove 22 to allow the mounting the nut 30.
• the nut 30 also has an annular groove 32 which can be placed opposite the annular groove 22 of the main body 20, as shown in FIG. 2.
• the retention ring 40 thus serves as an axial locking means for the nut 30 relative to the main body 20. Axially in the direction C, the nut 30 extends beyond the main body 20 and has an internal thread 34 for screwing the nut to a connector.
• the accessory according to the invention further comprises a ring 50 for coupling in rotation of the main body 20 and the connector to be assembled to the accessory.
• the ring 50 has tenons 52, extending substantially axially and able to penetrate into the housing 25 of substantially complementary shapes formed on the edge 24 of the main body 20. The insertion of the pins 52 in the housings 25 prevents any rotation of the main body 20 with respect to the ring 50.
• the ring 50 On the opposite side to the pins 52, the ring 50 has a toothing constituted by a plurality of teeth 54 substantially axial. These teeth 54 are shaped so as to mesh with complementary teeth formed on the connector.
• the ring 50 has a face 56 which, in longitudinal section, has a convex profile.
• the face 56 of the ring 50 has a convex demitoric shape.
• the ring 50 is made of an electrically insulating material, which advantageously eliminates any arcing at the teeth 54 and 100.
• the accessory 10 further comprises a bracelet 60 consisting of a plurality of tabs 62 extending substantially parallel to the axis D and connected to each other by a common base 64 extending substantially in a transverse plane , that is to say perpendicular to the axis D.
• the tabs 62 extend mainly along a notional cylinder of axis D. In cross section, as shown in FIG. 2, they have an S-shaped section whose first and second ends 66 and 68, respectively, are free and connected to the base 64, respectively.
• the belly of a tab 62 near the first end 66 constitutes a contact portion 70 intended to come into contact with an outer side surface of the connector.
• the bracelet 60 may be made of an electrically conductive material or covered, at least in part, with an electrically conductive material so as to ensure an electrical connection at least between the contact portion 70 and a portion of the strap 60 in contact, after assembly. of the accessory with the connector, with the main body 20.
• the base 64 On the opposite side to the tabs 62, the base 64 has a flange 72 extending substantially along a notional cylinder with an axis D.
• the set of tabs 62, the base 64 and the flange 72 thus define a substantially axial annular groove adapted to receive the ring 50, as shown in Figure 2.
• the base 64 has orifices or notches, not shown, which can be traversed by the pins 52 so that the latter can be housed in the housing 25 of the main body 20.
• the slice 24 of the main body 20 has, at least in the pinching region of the bracelet 60 with the ring 50, a concave demitoral section.
• the connector 90 has a stepped cylindrical shape.
• the connector 90 has successively: a first cylindrical section 9Oi of outside diameter D 1 , a cylindrical section 9O 2 of outside diameter D 2 less than D 1 , successively comprising a thread 93 and a surface Electrically conductive side plate 96 substantially smooth, a third cylindrical section 9O3 of outside diameter D 3 less than D 2 .
• the thread 93 is able to cooperate with the internal thread 34 of the nut 30.
• the conductive surface 96 cylindrical with axis D, is intended, as shown in FIG. 2, to come into contact with the contact portion 70 of the flaps 62 of the strap 60. It can also receive a seal, represent.
• the outer diameter of the conductive lateral surface 96 is slightly greater than the inside diameter of the strap 60 at the contact portions 70.
• the simple insertion of the connector 90 between the tabs 62 thus already ensures, because of the elasticity of the tabs 62, a minimum contact pressure between the contact portions 70 and the conductive surface 96.
• the connector 90 has a recess 98 connecting the second and third cylindrical sections 9O 2 and 9O 3 and provided with substantially axial teeth 100 shaped to cooperate with the teeth 54 of the ring 50 in order to ensure a coupling in rotation between the connector 90 and the ring 50.
• the recess 98 is shaped to serve as a stop ring 50 when assembling the connector and the accessory.
• the connector 90 is generally made of an electrically conductive material.
• the base 64 of the bracelet 60 is first placed on the edge 24 of the main body 20 in an angular position allowing the subsequent insertion of the pins 52 of the ring 50 in the housings 25
• the ring 50 is then housed in the bottom of the axial groove defined by the bracelet 60, as shown in FIG. 2, so that the tenons 52 penetrate the housings 25.
• the ring 50 has a shape requiring a mounting force, against the elastic force exerted by the tabs 62, to be placed at the bottom of the axial groove of the bracelet 60.
• the bracelet 60 thus ensures an axial locking of the ring 50 in the axial groove of the 60.
• the nut 30 is then mounted on the main body 20.
• the retention ring 40 is first deformed so as to be arranged in the annular groove 22 of the main body.
• the main body 20 is then introduced into the nut 30, until the nut 30 abuts with the retaining ring 40.
• the ring 40 is then forced inside the groove 22 so to allow an axial displacement of the nut in the direction A until the annular groove 32 is opposite the annular groove 22.
• the elasticity of the retaining ring then allows it to penetrate into the annular groove 32 of the nut, thus blocking axially the nut 30 relative to the main body 20.
• the diameter of the bracelet 60 at the free end 66 of the tabs 62 is greater than the inside diameter of the nut 30 at the internal thread 34.
• the axial immobilization of the nut on the main body 20 thus allows, simultaneously, an axial retention of the bracelet 60 relative to the main body 20.
• the mounted accessory can be assembled to the connector 90.
• the nut 30 is screwed onto the thread 93 of the connector.
• This screwing ensures a radial blocking and an axial guide facilitating the introduction of the conductive lateral surface 96 between the tabs 62 of the bracelet 60.
• the screwing is continued to the position shown in FIG. 2.
• the electrical contact between the part of contact 70 of the tabs 62 and the conductive lateral surface 96 of the connector 90 is then ensured by the elasticity of the tabs 62.
• the base 64 of the bracelet 60 is in contact with the face 56 of the ring 50, following a circle Ci, and secondly with the edge 24 of the main body 20 along two circles C 2 and C 3 , coaxial with the circle Ci and having larger and smaller diameters, respectively, than the diameter of Ci.
• the ring 50 is in abutment with the recess 98, the teeth 54 and 100 being engaged so as to coupling in rotation the connector 90 and the ring 50.
• the base 64 of the bracelet 60 undergoes a nip of increasing amplitude between the ring 50, axially abutting the recess 98, and the main body 20 pulled into the direction C of the connector by the nut 30, via the retaining ring 40.
• This nip of increasing amplitude represented by the three arrows F in FIG. 2, tends, given the complementary demitoric shapes of the face 56 of FIG. the ring 50 and the slice 24 of the main body 20, to deform the base 64, and thus to push the contact portion 70 of the tabs 62 to the axis A (arrow R).
• Adjusting the amplitude of the nip, by rotating the nut 30 beyond the position shown in Figure 2, advantageously allows a change in the pressure of the contact portion 70 of the tabs 62 on the cylindrical conductive surface 96 of the connector. This adjustment is possible while the cylindrical surface 96 has already been introduced between the tabs 62 of the bracelet 60. It does not therefore oppose the axial force that must exert the operator during this introduction.
• the pressure of the tabs 62 on the conductive surface 96 and the pressure between the base 64 of the bracelet 60 and the main body 20 of the accessory 10 can be adjusted to the desired level by simply tightening the locking nut, which that is the initial pressure exerted by the tabs 62, opposing the introduction of the connector 90 between the tabs 62.
• This initial pressure can therefore advantageously remain low, or even be zero.
• the assembly pins D of the main body 20, the nut 30, the ring 50, the bracelet 60 and the connector 90 are substantially merged.
• Figure 3 shows a variant of the embodiment of the invention described above.
• This embodiment differs in that the base 64 of the bracelet 60 extends, on the side opposite the tabs 62, in the direction A.
• it extends in the form of a cylindrical sleeve 73 made of a conductive material. extending, preferably, over the entire length L of the main body 20.
• this sleeve which may be a sheet metal part, can thus constitute a shield.
• the main body 20 can then be made of an insulating material, for example identical to that of the ring 50, as a thermoplastic.
• the cylindrical sleeve 73 may be closed, that is to say present in cross section a continuous circular section, or be open.
• Figures 4a and 4b show a second embodiment of the invention.
• the increase of the contact pressure does not result from a pivoting of the tabs under the effect of a pinch of the base 64 between the ring 50 and the main body 20.
• the base 64 ', the slice 24' and the face 56 'can extend all parallel, in transverse planes.
• the increase in pressure results from a thrust F 'of a shoulder 102' of the nut 30 'on a projecting outer surface 104' of the lugs 62 'during an axial displacement M of the nut on the body principal 20.
• This position shown in Figure 4a, can be obtained without the operator having to exert a high axial force.
• the operator causes the shoulder 102' to push on the surface 104 'of the teeth 62', as shown in Figure 4b (arrow F ').
• This thrust tends to pivot the contact portions 70 'of tabs 62' towards the axis D (arrow R ') and results in an increase in the pressure exerted by the contact portion 70' of the tabs 62 'on the surface Conductor 96.
• the contact pressure exerted by the tabs 62 'on the surface 96 can thus be increased and adjusted to a desired level after definitive positioning of the main body 20', the ring 50 'and the connector 90'.
• the moment when the pressure exerted by the contact portion is increased is not necessarily subsequent to the axial contacting of the connector, the ring, the bracelet and the main body.

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• Details Of Connecting Devices For Male And Female Coupling (AREA)

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• 2007
  • 2007-04-04 FR FR0754277A patent/FR2914789B1/fr not_active Expired - Fee Related
• 2008
  • 2008-04-03 US US12/593,748 patent/US7955131B2/en not_active Expired - Fee Related
  • 2008-04-03 WO PCT/FR2008/050587 patent/WO2008145878A1/fr active Application Filing
  • 2008-04-03 EP EP08788111A patent/EP2143174A1/de not_active Withdrawn

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