EP1910104A1 - Optimized support element - Google Patents

Optimized support element

Info

Publication number
EP1910104A1
EP1910104A1 EP06764206A EP06764206A EP1910104A1 EP 1910104 A1 EP1910104 A1 EP 1910104A1 EP 06764206 A EP06764206 A EP 06764206A EP 06764206 A EP06764206 A EP 06764206A EP 1910104 A1 EP1910104 A1 EP 1910104A1
Authority
EP
European Patent Office
Prior art keywords
support
seat
rim
partitions
face
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.)
Withdrawn
Application number
EP06764206A
Other languages
German (de)
French (fr)
Inventor
Jean-Charles Lacour
Sébastien RIGO
Denis Morin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Michelin Recherche et Technique SA Switzerland
Michelin Recherche et Technique SA France
Societe de Technologie Michelin SAS
Original Assignee
Michelin Recherche et Technique SA Switzerland
Michelin Recherche et Technique SA France
Societe de Technologie Michelin SAS
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Michelin Recherche et Technique SA Switzerland, Michelin Recherche et Technique SA France, Societe de Technologie Michelin SAS filed Critical Michelin Recherche et Technique SA Switzerland
Publication of EP1910104A1 publication Critical patent/EP1910104A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C17/00—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor
    • B60C17/04—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor utilising additional non-inflatable supports which become load-supporting in emergency
    • B60C17/06—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor utilising additional non-inflatable supports which become load-supporting in emergency resilient
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C17/00—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor
    • B60C17/04—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor utilising additional non-inflatable supports which become load-supporting in emergency
    • B60C17/06—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor utilising additional non-inflatable supports which become load-supporting in emergency resilient
    • B60C17/061—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor utilising additional non-inflatable supports which become load-supporting in emergency resilient comprising lateral openings

Definitions

  • the present invention relates to the support supports for vehicle tires, intended to be mounted on their rims inside the tires to support the load in case of tire failure or abnormally low pressure.
  • WO2005 / 044598 discloses a support support intended to be mounted on a rim inside a tire fitted to a vehicle, to support the tread of the tire in case of loss of inflation pressure, comprising:
  • annular body connecting the base and the top, said body being constituted by a plurality of generally radial supporting partitions distributed over the circumference of the support and extending axially substantially on either side of the support, wherein the support partitions have in their central portion two axially offset segments circumferentially offset and connected by an inclined segment and are connected in pairs by connecting elements extending substantially circumferentially and interrupted by axial slots of very small width, slots designed to facilitate the buckling of the bulkheads during a chicken nest or sidewalk shock.
  • each support partition has an oblique parallelepipedal shape with two circumferentially oriented outer faces disposed on either side of said support and two faces inclined relative to the circumferential direction of an angle ⁇ ,
  • the support according to the invention has the advantage of having a behavior during a hen-type or sidewalk type shock, that is to say during a localized shock on a substantially axially oriented indenter , a behavior much more regular than the support of the document WO2005 / 044598. Indeed, when such a shock falls on the central part of a wall of the support of this document, the buckling resistance is very strong and when the impact falls on an axial slot, the resistance is much more iàible.
  • small width is meant that the width in the circumferential direction separating two adjacent partitions is very significantly less than the radial height of an annular body. This ensures that when running at low pressure or at zero pressure, the partitions abut against each other.
  • each support partition has a central portion in the form of an oblique parallelepiped extended by two lateral portions of rectangular trapezoidal shape with an axial face, of axial width. said shoulder face and intended to abut against a similar shoulder face of the lateral part of the circumferentially adjacent support partition, a circumferential outer face and an inclined face relative to the circumferential direction of an angle ⁇ and extending the inclined face of the central portion of said support partition.
  • Each partition may also have at least one lateral portion extended axially by a substantially parallelepiped-shaped complementary portion with a shoulder face which extends the shoulder face of the adjacent lateral portion and a circumferential outer face of identical section. to the outer face of said adjacent side portion.
  • This complementary lateral part makes it possible to prevent the circumferential width of the outer faces of the partitions from becoming too low, which would deprive the lateral parts of a sufficient load bearing capacity.
  • the thickness of the central part of the partitions being e, the circumferential width of the outer faces / is such that:
  • the partitions prefferably resist in a unitary manner to shocks but always in a coordinated manner during a run flat that the width (d) in the circumferential direction of the slots remains greater than two millimeters and less than 3 millimeters .
  • each slot being defined geometrically by a transverse profile obtained by cutting the slot by a cutting plane substantially transverse to the mean direction of the slot, the transverse profile has at its radial ends curvatures (p) greater than one (1) mm.
  • curvatures p
  • the constituent material of a support support according to the invention may be a rubbery elastic modulus mixture of between 10 and 40 MPa. He can be also a polyurethane elastomer with a modulus of elasticity of between 20 and 150 MPa. Another preferred material is a thermoplastic elastomer with a modulus of elasticity of between 20 and 150 MPa.
  • Such a support support is particularly adapted to be disposed on a wheel rim so that the locking portion cooperates with the geometry of one of the seats to lock on its seat one of the beads of the tire.
  • the V support and blocking partitions form patterns of general shape Y.
  • the invention also relates to an assembly consisting of a support as previously described and a wheel with a wheel rim having a first rim seat of maximum diameter ⁇ sim a x, and a second rim seat of maximum diameter ⁇ s2ma ⁇ greater than the maximum diameter of said first seat ⁇ simax, said second seat being extended axially towards the first seat by a circumferential groove and a bearing surface whose outer diameter is substantially equal to the maximum diameter of the first seat ⁇ sim a x, characterized in that said wheel comprises a rim and a disc connected to said rim on the side of said second seat.
  • FIG. 1 is a side view of a support support
  • FIG. 2 is an axial sectional view of a wheel rim and the support of Figure 1;
  • FIG. 3 is a section AA as indicated in FIG. 1 of a support support according to the invention.
  • FIG. 4 similar to Figure 3, shows a section of a variant of a support support according to the invention
  • FIG. 5 similar to Figure 3, shows a section of a second variant of a support support according to the invention
  • FIG. 7 shows a cross section of the radial end of a slot
  • FIG. 8 similar to Figure 2, presents in axial section a support according to Figure 6 mounted on a wheel;
  • FIG. 9 shows, in partial perspective view, a section AA of a support support similar to that shown in Figure 5;
  • FIG. 10 presents a diagram comparing the forces recorded at the wheel center, as a function of the displacement, of a wheel and support support assembly according to FIG. 9 on a plane and on a representative indenter.
  • Figure 1 shows a side view of a support support 1 according to the invention.
  • This support consists essentially of three parts:
  • a base 2 of generally annular shape
  • annular body 4 connecting the base 2 and the vertex 3.
  • the base and the top may comprise elements such as mounting wedges or carving elements (pavers, ribs, ribs) which locally make the geometry of the support n 'is not annular, while being made to fit around an annular bearing surface of the wheel.
  • This support 1 is intended to be mounted around a wheel 5 with a preferred rim 6 as shown in Figure 2 and inside the cavity of a tire.
  • a preferred rim 6 is described in particular in document EP 1 206 357.
  • This rim 6 comprises an outer seat 8 and an inner seat 9. The two seats are of unequal diameters and the seat of smaller diameter is disposed on the outer side of the rim , that is to say adjacent to the connection zone between the disc and the rim.
  • the rim also comprises a bearing surface 10 in which the support 1 is disposed.
  • the bearing surface comprises a circumferential groove intended to cooperate with a plurality of blocking wedges 12 of the support 1 to block the support in use. on its reach 10.
  • FIG 3 In Figure 3 is shown an annular body 20. This figure is a sectional view AA as indicated in Figure 1.
  • the annular body 20 consists of oblique parallelepipedal partitions 21.
  • the partitions 21 extend laterally on either side of the circumferential mid-plane P and are regularly distributed over the circumference of the support. These partitions 21 are inclined relative to the circumferential direction by an angle ⁇ between 70 and 85 degrees depending on the axial width of the support support. Their thickness e is constant. Two adjacent partitions have an opposite inclination relative to the axial direction and form a V-shaped pattern.
  • the partitions 21 comprise two inclined faces 23, of inclination ⁇ relative to the circumferential direction and two outer faces 24 of circumferential orientation.
  • Two adjacent outer faces are separated from one axial side of the support by a slot 22, this slot has a circumferential distance d of between 2 and 3 mm; on the other side, two adjacent outer faces 24 are separated at most a circumferential distance D so that the support supports can be mounted around the bearing surface 10 without problems.
  • the support is pushed axially by a rotary mounting roller of given diameter.
  • Such mounting rollers usually have a diameter of the order of 40 mm and this circumferential distance must be at most 40 mm. mm to avoid that during assembly the roller will not penetrate between two adjacent partitions and thus may damage these partitions and support.
  • the inclination of the partitions is variable depending on the number of partitions and the axial width of the support support.
  • the sizing of the partitions 21 is mainly made according to the load that must bear the support and the acceptable boom to carry this load.
  • the number of partitions also intervenes. This number plays directly on the buckling load of the partitions for a given stiffness. It is the volume of the partitions which thus determines the rigidity of crushing on a plane floor of the support.
  • the support shown in Figure 3 has a K ratio substantially greater than 2.10. This support, however, has a behavior that is not regular enough depending on the azimuth.
  • Figure 4 shows an annular body 30 the partitions have an oblique central parallelepipedal portion 21 as previously extended on either side of the two outer faces 24 by side portions 31 of substantially rectangular trapezoidal shape.
  • These lateral portions 31 comprise a face identical to the face 24, an outer face 34 of circumferential orientation, a face 32 of axial orientation called shoulder face and an inclined face 33 which lies in the extension of the face. 23.
  • two adjacent partitions are separated on one axial side by a slot 35 whose circumferential distance is between 2 and 3 mm, and on the other by a circumferential distance D less than or equal to the diameter of a roller usual mounting.
  • the addition of the rectangular trapezoidal side portions has two main advantages. This improves the run-flat behavior by allowing good support from one pattern to the other because the shoulder faces are large enough. It also improves the regularity of the behavior under a transverse shock.
  • the axial distance / outer faces 34 should preferably remain such that:
  • the axial length L of the shoulder faces 32 must be such that:
  • FIG. 5 shows an annular body similar to that of Figure 4 wherein the side portions are extended by a complementary portion 41 in the form of parallelepiped.
  • These complementary lateral parts comprise an outer face 44 of identical section to the face 34, a complementary shoulder face 42 which axially extends the face 32 and a face 43 parallel to 42 and disposed in the extension of the face 33.
  • the interest of this complementary lateral portion 41 is to allow to respect the preceding limits for / and L in certain configurations of thickness, inclination and axial width of the partitions and the support.
  • FIG. 6 A second embodiment of a support according to the invention is shown in Figures 6 and 8. These figures have a support 130 comprises a portion 132 of the load support and an additional portion 134 of the bead of the tire lock .
  • This support 130 comprises an annular body 50.
  • This annular body is shown in Figure 6. It consists of partitions similar to those of Figure 4 supplemented axially on one side of the support by axial partitions 51. These axial partitions 51 have a thickness substantially smaller than that of the partitions 21. Their function is to allow to connect the top to the base by providing sufficient axial rigidity to be able to cooperate with a safety boss to lock in position a tire bead and disassemble the support by pushing a mounting roller. This part of the annular body has only a marginal contribution to the carrying of the load.
  • the patterns of the partitions of the annular body 50 thus have a general shape of Y.
  • FIG. 8 illustrates a second set 100 tire 102, wheel 110 and support 130 according to the invention.
  • the wheel 110 of this set has the same as that of Figure 2 two seats of maximum diameters ⁇ sim a x and different. It differs from the wheel 5 of Figure 2 in that the connection area between the disk 114 and the rim 112 is disposed on the side of the seat 116 of larger diameter ⁇ s2ma ⁇ -
  • the tire 102 comprises a tread 104, two flanks 106 and two beads 108 of different diameters adapted to rest on the seats 116 and 118 of the rim 112.
  • the rim 112 comprises a bearing surface 120 around which substantially rests the support portion 132 of the support 130 and between the seat 116 and the bearing surface 120, a circumferential groove 122.
  • This circumferential groove 122 serves to accommodate the wheel valve and to allow the assembly and disassembly of the bead 108 of the tire on the seat 116.
  • the locking portion 134 of the support 130 abuts against the flank 126 of the circumferential groove 124 to cooperate with the safety boss 128 of the seat 116 to lock in position the bead 108 of the tire 102.
  • Figure 7 shows an advantageous form of the transverse profile of the radial ends of the slots 35 and 45. This transverse profile is obtained by cutting the slot by a cutting plane substantially transverse to the mean direction of the slot.
  • transverse width d of the slot is substantially constant over the entire radial height of the slot.
  • This transverse width d is here of the order of 2 to 2.5 mm.
  • This profile has at its radial end a bulge of width greater than d. At this end, the transverse profile has curvatures p greater than one millimeter.
  • the bulge is toroidal shape with a radius of about two mm.
  • this bulge is located at both inner and outer radial ends of the slot.
  • Figure 9 shows a partial perspective view a section AA of a support support similar to that of Figure 5.
  • the annular body 30 of this support comprises inclined oblique partitions 21 extended on either side by complementary parts in the form of rectangle trapezium 31.
  • This figure also includes the base 2 of the support. This base 2 has the same axial dimension as the partitions of the annular body.
  • FIG. 10 illustrates the behavior of the optimized support of FIG. 9 during a flat plane crash at 80 ° C. (curve a) and on a half cylindrical indenter of FIG. diameter 80 mm at 23 ° C (curve b).
  • the crushes are carried out the support being mounted on its service rim.
  • the two curves a and b have a first substantially linear portion followed by a maximum which corresponds to the buckling of the partitions.
  • the support is sized to crash on a flat ground with an arrow / N under its service load Q N
  • This design on ground plane is preferably carried out considering the support at its operating temperature in running at dish. This temperature is of the order of 80 ° C or more.
  • the ratio Q N IQ C corresponds to the ratio of the ground plane / indent rigidities.
  • the indenter crash tests are carried out at room temperature. The ratio of the rigidities considered thus takes into account the evolution of the modulus of the material constituting the support between the ambient and operating temperatures. This significantly penalizes the values obtained from these reports.
  • the ratio of plane / indent rigidities here is greater than 2.5 in the case of a support made with a rubbery mixture.
  • This support support is thus optimized due to the fact that the areas of the walls impacted during a transverse (or axial) impact are minimal and very regular depending on the azimuth, the support has a high rigidity axial which allows excellent behavior and distance D between two adjacent partitions allows easy assembly (and disassembly).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tires In General (AREA)

Abstract

The invention relates to a support element to be mounted on a rim inside a tire on a vehicle for supporting the tread of this tire in the event of a loss in filling pressure. The support element comprises, a base, a top and an annular body in which each support wall of the annular body has a slanted parallelepiped shape with two circumferentially oriented outer faces placed on both sides of the support element and two faces that are slanted in relation to the circumferential direction of an angle a, two adjacent support walls forming a V-shaped pattern, and at the base of V, two adjacent support walls are separated by a narrow lateral slit radially extending over the entire annular body.

Description

APPUI DE SOUTIEN OPTIMISÉ OPTIMIZED SUPPORT SUPPORT
[0001] La présente invention concerne les appuis de soutien pour pneumatiques de véhicules, destinés à être montés sur leurs jantes à l'intérieur des pneumatiques pour supporter la charge en cas de défaillance du pneumatique ou de pression anormalement basse.The present invention relates to the support supports for vehicle tires, intended to be mounted on their rims inside the tires to support the load in case of tire failure or abnormally low pressure.
[0002] Le document WO2005/044598 décrit un appui de soutien destiné à être monté sur une jante à l'intérieur d'un pneumatique équipant un véhicule, pour supporter la bande de roulement de ce pneumatique en cas de perte de pression de gonflage, comportant :WO2005 / 044598 discloses a support support intended to be mounted on a rim inside a tire fitted to a vehicle, to support the tread of the tire in case of loss of inflation pressure, comprising:
- une base sensiblement cylindrique destinée à s'adapter autour de la jante,a substantially cylindrical base intended to fit around the rim,
- un sommet sensiblement cylindrique destiné à entrer en contact avec la partie intérieure du pneumatique située sous la bande de roulement en cas de perte de pression et laissant une garde par rapport à celle-ci à la pression nominale de fonctionnement du pneumatique, eta substantially cylindrical vertex intended to come into contact with the inner part of the tire situated under the tread in the event of loss of pressure and leaving a guard with respect thereto at the nominal operating pressure of the tire, and
- un corps annulaire reliant la base et le sommet, ledit corps étant constitué par une pluralité de cloisons de support généralement radiales, réparties sur la circonférence de l'appui et s'étendant axialement sensiblement de part et d'autre de l'appui, dans lequel les cloisons de support présentent dans leur partie centrale deux segments orientés axialement décalés circonférentiellement et reliés par un segment incliné et sont reliées deux à deux par des éléments de jonction s'étendant sensiblement circonférentiellement et interrompues par des fentes axiales de très faible largeur, les fentes ayant pour objectif de faciliter le flambement des cloisons lors d'un choc nid de poule ou trottoir.an annular body connecting the base and the top, said body being constituted by a plurality of generally radial supporting partitions distributed over the circumference of the support and extending axially substantially on either side of the support, wherein the support partitions have in their central portion two axially offset segments circumferentially offset and connected by an inclined segment and are connected in pairs by connecting elements extending substantially circumferentially and interrupted by axial slots of very small width, slots designed to facilitate the buckling of the bulkheads during a chicken nest or sidewalk shock.
[0003] L'invention a pour objet un appui de soutien similaire dans lequel le fonctionnement lors d'un choc est encore amélioré sans dégrader ses performances de roulage à plat.The invention relates to a similar support support in which the operation during a shock is further improved without degrading its running flat performance.
[0004] L'appui de soutien selon l'invention est caractérisé en ce que : - chaque cloison de support a une forme de parallélépipède oblique avec deux faces extérieures orientées circonférentiellement disposées de part et d'autre dudit appui et deux faces inclinées relativement à la direction circonférentielle d'un angle α,The support support according to the invention is characterized in that: each support partition has an oblique parallelepipedal shape with two circumferentially oriented outer faces disposed on either side of said support and two faces inclined relative to the circumferential direction of an angle α,
- en ce que deux cloisons de support adjacentes forment un motif en forme de V, etin that two adjacent support partitions form a V-shaped pattern, and
- en ce que deux cloisons de support adjacentes sont séparées à la base du V par une fente axiale de faible largeur s'étendant radialement sur la totalité du corps annulaire.in that two adjacent support partitions are separated at the base of the V by an axial slot of small width extending radially over the entire annular body.
[0005] L'appui selon l'invention a l'avantage de présenter un comportement lors d'un choc de type nid de poule ou trottoir, c'est-à-dire lors d'un choc localisé sur un indenteur orienté sensiblement axialement, un comportement beaucoup plus régulier que l'appui du document WO2005/044598. En effet, lorsqu'un tel choc tombe sur la partie centrale d'une cloison de l'appui de ce document, la résistance au flambement est très forte et lorsque le choc tombe sur une fente axiale, la résistance est beaucoup plus iàible.The support according to the invention has the advantage of having a behavior during a hen-type or sidewalk type shock, that is to say during a localized shock on a substantially axially oriented indenter , a behavior much more regular than the support of the document WO2005 / 044598. Indeed, when such a shock falls on the central part of a wall of the support of this document, the buckling resistance is very strong and when the impact falls on an axial slot, the resistance is much more iàible.
[0006] Par faible largeur, on entend que la largeur dans la direction circonférentielle séparant deux cloisons adjacentes est très notablement inférieure à la hauteur radiale d'un corps annulaire. C'est ce qui assure que en roulage à faible pression ou à pression nulle, les cloisons viennent en appui les unes contre les autres.By small width is meant that the width in the circumferential direction separating two adjacent partitions is very significantly less than the radial height of an annular body. This ensures that when running at low pressure or at zero pressure, the partitions abut against each other.
[0007] Selon un mode de réalisation préférentiel, l'appui selon l'invention est tel que chaque cloison de support a une partie centrale en forme de parallélépipède oblique prolongée par deux parties latérales de forme trapézoïdale rectangle avec une face axiale, de largeur axiale donnée, dite face d'épaulement et destinée à venir s'appuyer contre une face d'épaulement similaire de la partie latérale de la cloison de support adjacente circonférentiellement, une face extérieure circonférentielle et une face inclinée relativement à la direction circonférentielle d'un angle α et prolongeant la face inclinée de la partie centrale de ladite cloison de support.According to a preferred embodiment, the support according to the invention is such that each support partition has a central portion in the form of an oblique parallelepiped extended by two lateral portions of rectangular trapezoidal shape with an axial face, of axial width. said shoulder face and intended to abut against a similar shoulder face of the lateral part of the circumferentially adjacent support partition, a circumferential outer face and an inclined face relative to the circumferential direction of an angle α and extending the inclined face of the central portion of said support partition.
[0008] Ce mode de réalisation rend encore plus homogène le comportement d'un tel appui lors d'un choc quel que soit l'azimut du choc. Il a aussi l'avantage de procurer une pression de contact entre le sommet de l'appui et le sommet du pneumatique plus homogène lors d'un roulage à plat. Cela permet d'éviter que les lubrifiants disposés dans Ia cavité formée par le pneumatique et la jante pour faciliter le roulage à plat ne soient expulsés de l'interface pneumatique/sommet de l'appui en roulage à plat.This embodiment makes even more homogeneous the behavior of such support during a shock regardless of the azimuth of the shock. It also has the advantage of providing a contact pressure between the top of the support and the top of the tire more homogeneous during a flat run. This makes it possible to prevent the lubricants arranged in Ia cavity formed by the tire and the rim to facilitate the run flat are expelled from the pneumatic interface / top of the support run flat.
[0009] Chaque cloison peut aussi avoir au moins une partie latérale prolongée axialement par une partie complémentaire de forme sensiblement de parallélépipède avec une face d'épaulement qui prolonge la face d'épaulement de la partie latérale adjacente et une face extérieure circonférentielle de section identique à la face extérieure de ladite partie latérale adjacente.Each partition may also have at least one lateral portion extended axially by a substantially parallelepiped-shaped complementary portion with a shoulder face which extends the shoulder face of the adjacent lateral portion and a circumferential outer face of identical section. to the outer face of said adjacent side portion.
[0010] Cette partie latérale complémentaire permet d'éviter que la largeur circonférentielle des faces extérieures des cloisons ne devienne trop faible, ce qui priverait les parties latérales d'une capacité de port de charge suffisante.This complementary lateral part makes it possible to prevent the circumferential width of the outer faces of the partitions from becoming too low, which would deprive the lateral parts of a sufficient load bearing capacity.
[0011] Avantageusement, l'épaisseur de la partie centrale des cloisons étant e, la largeur circonférentielle des faces extérieures / est telle que :Advantageously, the thickness of the central part of the partitions being e, the circumferential width of the outer faces / is such that:
33
Et, l'épaisseur de la partie centrale des cloisons étant e, la largeur axiale desdites faces d'épaulement L est telle que :And, the thickness of the central part of the partitions being e, the axial width of said shoulder faces L is such that:
[0012] Ces valeurs permettent d'optimiser la géométrie des cloisons pour qu'elles aient une réponse suffisamment homogène lors de chocs mais aussi lors de roulage à plat.These values make it possible to optimize the geometry of the partitions so that they have a sufficiently homogeneous response during shocks but also when running flat.
[0013] II est avantageux pour que les cloisons résistent de façon unitaire aux chocs mais toujours de façon coordonnée lors d'un roulage à plat que la largeur (d) dans le sens circonférentiel des fentes reste supérieure à deux millimètres et inférieure à 3 millimètres.It is advantageous for the partitions to resist in a unitary manner to shocks but always in a coordinated manner during a run flat that the width (d) in the circumferential direction of the slots remains greater than two millimeters and less than 3 millimeters .
[0014] De préférence, chaque fente étant définie géométriquement par un profil transversal obtenu en coupant la fente par un plan de coupe sensiblement transversal à la direction moyenne de la fente, le profil transversal présente à ses extrémités radiales des courbures (p) supérieures à un (1) mm. [0015] Le fait que les fentes présentent à leur ou leurs extrémités radiales un profil transversal avec une courbure supérieure à 1 mm permet d'obtenir un excellent comportement en fatigue de ces extrémités. En effet, on a constaté qu'avec des courbures inférieures, par exemple de l'ordre de 0,5 mm, des fissures peuvent progressivement apparaître lors de roulage à plat à ces extrémités radiales des fentes ou lors de chocs répétés sur des coins par exemple.Preferably, each slot being defined geometrically by a transverse profile obtained by cutting the slot by a cutting plane substantially transverse to the mean direction of the slot, the transverse profile has at its radial ends curvatures (p) greater than one (1) mm. The fact that the slots have at their or their radial ends a transverse profile with a curvature greater than 1 mm provides excellent fatigue behavior of these ends. Indeed, it has been found that with lower curvatures, for example of the order of 0.5 mm, cracks can gradually appear when running flat at these radial ends of the slots or during repeated impacts on corners by example.
[0016] II est avantageux que ces courbures soient comprises entre : dIt is advantageous that these curvatures are between: d
dans lequel d est la largeur transversale des fentes.in which d is the transverse width of the slots.
[0017] Les appuis de soutien selon l'invention sont destinés à être monté (et démontés) autour d'une jante comportant une portée d'appui en étant poussés axialement par un galet de montage rotatif de diamètre donné, l'ensemble roue, pneumatique et appui étant mis en rotation. Un exemple d'un tel outil de montage ainsi que le procédé de montage sont décrits par exemple dans la demande EP 1351832 Bl. Pour faciliter ce montage et ce démontage, il est avantageux que la distance axiale séparant les faces extérieures disposées dans un même plan méridien de deux cloisons adjacentes soit inférieure au diamètre de ce galet de montage. Une valeur classique de diamètre de galet de montage est de 40 mm. Lorsque l'appui présente des ouvertures de longueur circonférentielle supérieure à 40 mm, le galet de montage peut rentrer dans ces ouvertures et ainsi ne pas réussir à effectuer un déplacement régulier de l'appui sur la portée d'appui de la jante.The support supports according to the invention are intended to be mounted (and disassembled) around a rim having a bearing surface by being pushed axially by a rotary mounting roller of given diameter, the wheel assembly, pneumatic and support being rotated. An example of such a mounting tool and the mounting method are described for example in the application EP 1351832 B1. To facilitate this assembly and disassembly, it is advantageous that the axial distance separating the outer faces arranged in the same plane meridian of two adjacent partitions is less than the diameter of the mounting roller. A typical mounting roller diameter value is 40 mm. When the support has openings of circumferential length greater than 40 mm, the mounting roller can enter these openings and thus fail to make a regular displacement of the support on the bearing surface of the rim.
[0018] Pour faciliter la réalisation d'un appui selon l'invention, la forme des cloisons, des cloisons de blocage et des fentes est avantageusement adaptée de manière à ne comprendre aucune partie en contre dépouille s 'opposant à un démoulage axial de l'appui de soutien.To facilitate the production of a support according to the invention, the shape of the partitions, blocking walls and slots is advantageously adapted so as not to include any part against undercut opposed to an axial demolding of the support support.
[0019] Le matériau constitutif d'un appui de soutien selon l'invention peut être un mélange caoutchouteux de module d'élasticité compris entre 10 et 40 MPa. Il peut être aussi un élastomère de polyuréthane de module d'élasticité compris entre 20 et 150 MPa. Un autre matériau préféré est un élastomère thermoplastique de module d'élasticité compris entre 20 et 150 MPa.The constituent material of a support support according to the invention may be a rubbery elastic modulus mixture of between 10 and 40 MPa. He can be also a polyurethane elastomer with a modulus of elasticity of between 20 and 150 MPa. Another preferred material is a thermoplastic elastomer with a modulus of elasticity of between 20 and 150 MPa.
[0020] Selon un second mode de réalisation de l'appui de soutien selon l'invention, cet appui est tel qu'il comprend une partie additionnelle de blocage avec un sommet, une base et un corps annulaire prolongeant axialement d'un côté le sommet, la base et le corps annulaire de l'appui et tel que le corps annulaire de la partie de blocage comprend une pluralité de cloisons de blocage prolongeant axialement une fraction des cloisons de support de l'appui.According to a second embodiment of the support support according to the invention, this support is such that it comprises an additional blocking portion with a top, a base and an annular body axially extending on one side the the base, the base and the annular body of the support and such that the annular body of the locking portion comprises a plurality of locking partitions extending axially a fraction of the supporting support partitions.
[0021] Un tel appui de soutien est particulièrement adapté pour être disposé sur une jante de roue de telle sorte que la partie de blocage coopère avec la géométrie de l'un des sièges pour bloquer sur son siège l'un des bourrelets du pneumatique.Such a support support is particularly adapted to be disposed on a wheel rim so that the locking portion cooperates with the geometry of one of the seats to lock on its seat one of the beads of the tire.
[0022] Selon un mode de réalisation avantageux, les cloisons de support en V et de blocage forment des motifs de forme générale Y.According to an advantageous embodiment, the V support and blocking partitions form patterns of general shape Y.
[0023] L'invention a aussi pour objet un ensemble constitué par un appui tel que précédemment décrit et une roue avec une jante de roue comportant un premier siège de jante de diamètre maximum Φsimax, et un second siège de jante de diamètre maximum Φs2maχ supérieur au diamètre maximum dudit premier siège Φsimax, ledit second siège étant prolongé axialement vers le premier siège par une gorge circonférentielle et une portée d'appui dont le diamètre extérieur est sensiblement égal au diamètre maximum du premier siège Φsimax, caractérisé en ce que ladite roue comporte une jante et un disque lié à ladite jante du côté dudit second siège.The invention also relates to an assembly consisting of a support as previously described and a wheel with a wheel rim having a first rim seat of maximum diameter Φsim a x, and a second rim seat of maximum diameter Φs2maχ greater than the maximum diameter of said first seat Φsimax, said second seat being extended axially towards the first seat by a circumferential groove and a bearing surface whose outer diameter is substantially equal to the maximum diameter of the first seat Φsim a x, characterized in that said wheel comprises a rim and a disc connected to said rim on the side of said second seat.
[0024] Cet ensemble a l'avantage par rapport aux ensembles similaires connus d'offrir un gain complémentaire en termes d'anti intrusivité lié à l'augmentation de la garde entre appui et pneu lorsque l'on garde le même diamètre maximum de la roue. [0025] D'autres caractéristiques et avantages de l'invention ressortent de la description faite ci-après en référence aux dessins annexés qui montrent, à titre d'exemples non limitatifs, des formes de réalisation de l'objet de l'invention :This set has the advantage over similar sets known to offer additional gain in terms of anti-intrusiveness related to the increase of the guard between support and tire when we keep the same maximum diameter of the wheel. Other features and advantages of the invention appear from the description given hereinafter with reference to the accompanying drawings which show, by way of non-limiting examples, embodiments of the subject of the invention:
- la figure 1 est une vue de côté d'un appui de soutien ;- Figure 1 is a side view of a support support;
- la figure 2 est une vue en coupe axiale d'une jante de roue et de l'appui de la figure 1 ;- Figure 2 is an axial sectional view of a wheel rim and the support of Figure 1;
- la figure 3 est une coupe AA tel qu'indiqué à la figure 1 d'un appui de soutien selon l'invention ;FIG. 3 is a section AA as indicated in FIG. 1 of a support support according to the invention;
- la figure 4, similaire à la figure 3, présente une coupe d'une variante d'un appui de soutien selon l'invention ;- Figure 4, similar to Figure 3, shows a section of a variant of a support support according to the invention;
- la figure 5, similaire à la figure 3, présente une coupe d'une seconde variante d'un appui de soutien selon l'invention ;- Figure 5, similar to Figure 3, shows a section of a second variant of a support support according to the invention;
- la figure 6, similaire à la figure 3, présente une coupe d'un second mode de réalisation d'un appui de soutien selon l'invention ;FIG. 6, similar to FIG. 3, shows a section of a second embodiment of a support support according to the invention;
- la figure 7 présente une coupe transversale de l'extrémité radiale d'une fente ;- Figure 7 shows a cross section of the radial end of a slot;
- la figure 8, similaire à la figure 2, présente en coupe axiale un appui selon la figure 6 monté sur une roue ;- Figure 8, similar to Figure 2, presents in axial section a support according to Figure 6 mounted on a wheel;
- la figure 9 présente, en vue partielle en perspective, une coupe AA d'un appui de soutien similaire à celui présenté à la figure 5 ; et- Figure 9 shows, in partial perspective view, a section AA of a support support similar to that shown in Figure 5; and
- la figure 10 présente un diagramme comparant les efforts enregistrés au centre roue, en fonction du déplacement, d'un ensemble roue et appui de soutien selon la figure 9 sur un plan et sur un indenteur représentatif.FIG. 10 presents a diagram comparing the forces recorded at the wheel center, as a function of the displacement, of a wheel and support support assembly according to FIG. 9 on a plane and on a representative indenter.
[0026] La figure 1 présente en vue de côté un appui de soutien 1 selon l'invention. Cet appui comprend essentiellement trois parties :Figure 1 shows a side view of a support support 1 according to the invention. This support consists essentially of three parts:
- une base 2, de forme généralement annulaire ;a base 2, of generally annular shape;
- un sommet 3, sensiblement annulaire ; eta vertex 3, substantially annular; and
- un corps annulaire 4 de liaison entre la base 2 et le sommet 3.an annular body 4 connecting the base 2 and the vertex 3.
[0027] Par généralement ou sensiblement annulaire, on entend que la base et le sommet peuvent comprendre des éléments tels des cales de montage ou des éléments de sculpture (pavés, ribs, nervures) qui font que localement, la géométrie de l'appui n'est pas annulaire, tout en étant fait pour s'adapter autour d'une portée d'appui annulaire de la roue.By generally or substantially annular, it is meant that the base and the top may comprise elements such as mounting wedges or carving elements (pavers, ribs, ribs) which locally make the geometry of the support n 'is not annular, while being made to fit around an annular bearing surface of the wheel.
[0028] Cet appui 1 est destiné à être monté autour d'une roue 5 avec une jante préférentielle 6 telle que présentée à la figure 2 et à l'intérieur de la cavité d'un pneumatique. Une telle jante est décrite notamment dans le document EP 1 206 357. Cette jante 6 comprend un siège extérieur 8 et un siège intérieur 9. Les deux sièges sont de diamètres inégaux et le siège de plus petit diamètre est disposé du côté extérieur de la jante, c'est-à-dire adjacent à la zone de liaison entre le disque et la jante. La jante comprend aussi une portée d'appui 10 où est disposé l'appui 1. La portée d'appui comporte une rainure circonférentielle destinée à coopérer avec une pluralité de cales de blocage 12 de l'appui 1 pour bloquer en service l'appui sur sa portée 10.This support 1 is intended to be mounted around a wheel 5 with a preferred rim 6 as shown in Figure 2 and inside the cavity of a tire. Such a rim is described in particular in document EP 1 206 357. This rim 6 comprises an outer seat 8 and an inner seat 9. The two seats are of unequal diameters and the seat of smaller diameter is disposed on the outer side of the rim , that is to say adjacent to the connection zone between the disc and the rim. The rim also comprises a bearing surface 10 in which the support 1 is disposed. The bearing surface comprises a circumferential groove intended to cooperate with a plurality of blocking wedges 12 of the support 1 to block the support in use. on its reach 10.
[0029] A la figure 3 est présentée un corps annulaire 20. Cette figure est une vue en coupe AA tel qu'indiqué à la figure 1. Le corps annulaire 20 est constitué de cloisons parallélépipédiques obliques 21.In Figure 3 is shown an annular body 20. This figure is a sectional view AA as indicated in Figure 1. The annular body 20 consists of oblique parallelepipedal partitions 21.
[0030] Les cloisons 21 s'étendent latéralement de part et d'autre du plan médian circonférentiel P et sont régulièrement réparties sur la circonférence de l'appui. Ces cloisons 21 sont inclinées relativement à la direction circonférentielle d'un angle α compris entre 70 et 85 degrés en fonction de la largeur axiale de l'appui de soutien. Leur épaisseur e est constante. Deux cloisons adjacentes ont une inclinaison opposée relativement à la direction axiale et forment un motif en forme de V. Les cloisons 21 comportent deux faces inclinées 23, d'inclinaison α relativement à la direction circonférentielle et deux faces 24 extérieures d'orientation circonférentielle. Deux faces extérieures adjacentes sont séparées d'un côté axial de l'appui par une fente 22, cette fente a une distance circonférentielle d comprise entre 2 et 3 mm ; de l'autre côté, deux faces extérieures 24 adjacentes sont séparées au plus d'une distance circonférentielle D pour que les appuis de soutien puissent être montés autour de la portée d'appui 10 sans problème. En effet, pendant ce montage, l'appui est poussé axialement par un galet de montage rotatif de diamètre donné. De tels galets de montage ont usuellement un diamètre de l'ordre de 40 mm et cette distance circonférentielle doit être au plus de 40 mm pour éviter qu'au cours du montage le galet ne risque de pénétrer entre deux cloisons adjacentes et ainsi puisse détériorer ces cloisons et l'appui. En conséquence, l'inclinaison des cloisons est variable en fonction du nombre de cloisons et de la largeur axiale de l'appui de soutien.The partitions 21 extend laterally on either side of the circumferential mid-plane P and are regularly distributed over the circumference of the support. These partitions 21 are inclined relative to the circumferential direction by an angle α between 70 and 85 degrees depending on the axial width of the support support. Their thickness e is constant. Two adjacent partitions have an opposite inclination relative to the axial direction and form a V-shaped pattern. The partitions 21 comprise two inclined faces 23, of inclination α relative to the circumferential direction and two outer faces 24 of circumferential orientation. Two adjacent outer faces are separated from one axial side of the support by a slot 22, this slot has a circumferential distance d of between 2 and 3 mm; on the other side, two adjacent outer faces 24 are separated at most a circumferential distance D so that the support supports can be mounted around the bearing surface 10 without problems. Indeed, during this assembly, the support is pushed axially by a rotary mounting roller of given diameter. Such mounting rollers usually have a diameter of the order of 40 mm and this circumferential distance must be at most 40 mm. mm to avoid that during assembly the roller will not penetrate between two adjacent partitions and thus may damage these partitions and support. As a result, the inclination of the partitions is variable depending on the number of partitions and the axial width of the support support.
[0031] Le dimensionnement des cloisons 21 est principalement réalisé en fonction de la charge que doit porter l'appui et de la flèche acceptable pour porter cette charge. Le nombre de cloisons intervient aussi. Ce nombre joue directement sur la charge de flambement des cloisons pour une rigidité donnée. C'est le volume des cloisons qui détermine ainsi la rigidité d'écrasement sur un sol plan de l'appui.The sizing of the partitions 21 is mainly made according to the load that must bear the support and the acceptable boom to carry this load. The number of partitions also intervenes. This number plays directly on the buckling load of the partitions for a given stiffness. It is the volume of the partitions which thus determines the rigidity of crushing on a plane floor of the support.
[0032] Un autre test intervient pour l'optimisation de la géométrie des appuis de soutien. C'est la rigidité d'écrasement de l'appui monté sur sa portée d'appui contre un indenteur de forme demi cylindrique et de diamètre 80 mm. Il a été trouvé qu'un tel indenteur est représentatif de l'écrasement d'un ensemble complet pneumatique appui et roue lors d'un choc sur un indenteur transversal tel un trottoir ou un nid de poule.Another test intervenes for the optimization of the geometry of the support supports. It is the crushing rigidity of the support mounted on its bearing surface against a half-cylindrical shaped indenter with a diameter of 80 mm. It has been found that such an indenter is representative of the crushing of a complete pneumatic support and wheel assembly during an impact on a transverse indenter such as a sidewalk or a pothole.
[0033] Pour optimiser la géométrie d'un appui de soutien, on cherche à augmenter le rapport entre la rigidité d'écrasement sur un sol plan et la rigidité d'écrasement sur cet indenteur représentatif, cette dernière rigidité d'écrasement étant prise dans les conditions les plus défavorables, c'est-à-dire que l'on retient la rigidité maximale en fonction de l'azimut de l'appui.To optimize the geometry of a support support, it is sought to increase the ratio between the crush stiffness on a flat ground and the crush stiffness on this representative indentor, the latter crush rigidity being taken in the most unfavorable conditions, that is to say that one retains the maximum rigidity according to the azimuth of the support.
[0034] L'appui présenté à la figure 3 présente un rapport K sensiblement supérieur à 2,10. Cet appui présente cependant un comportement qui n'est pas assez régulier en fonction de l'azimut.The support shown in Figure 3 has a K ratio substantially greater than 2.10. This support, however, has a behavior that is not regular enough depending on the azimuth.
[0035] La figure 4 présente un corps annulaire 30 les cloisons présentent une partie centrale parallélépipédique oblique 21 comme précédemment prolongée de part et d'autre des deux faces extérieures 24 par des parties latérales 31 de forme sensiblement trapézoïdale rectangle. Ces parties latérales 31 comprennent une face identique à la face 24, une face extérieure 34 d'orientation circonférentielle, une face 32 d'orientation axiale dite face d'épaulement et une face inclinée 33 qui se situe dans le prolongement de la face 23. Comme précédemment, deux cloisons adjacentes sont séparées d'un côté axial par une fente 35 dont la distance circonférentielle est comprise entre 2 et 3 mm, et de l'autre par une distance circonférentielle D inférieure ou égale au diamètre d'un galet de montage usuel.Figure 4 shows an annular body 30 the partitions have an oblique central parallelepipedal portion 21 as previously extended on either side of the two outer faces 24 by side portions 31 of substantially rectangular trapezoidal shape. These lateral portions 31 comprise a face identical to the face 24, an outer face 34 of circumferential orientation, a face 32 of axial orientation called shoulder face and an inclined face 33 which lies in the extension of the face. 23. As previously, two adjacent partitions are separated on one axial side by a slot 35 whose circumferential distance is between 2 and 3 mm, and on the other by a circumferential distance D less than or equal to the diameter of a roller usual mounting.
[0036] L'ajout des parties latérales de forme trapézoïdale rectangle a deux avantages principaux. Cela permet d'améliorer le comportement en roulage à plat en permettant un bon appui d'un motif sur l'autre parce que les faces d'épaulement sont suffisamment grandes. Cela permet aussi d'améliorer la régularité du comportement sous un choc transversal.The addition of the rectangular trapezoidal side portions has two main advantages. This improves the run-flat behavior by allowing good support from one pattern to the other because the shoulder faces are large enough. It also improves the regularity of the behavior under a transverse shock.
[0037] La distance axiale / des faces extérieures 34 doit de préférence rester telle que :The axial distance / outer faces 34 should preferably remain such that:
3 dans lequel e est l'épaisseur des cloisons dans leur partie centrale.3 in which e is the thickness of the partitions in their central part.
[0038] Le respect de cette limite permet de donner et de garder aux parties latérales un rôle complémentaire efficace de port de la charge.Compliance with this limit allows to give and keep the side parts an effective complementary role of carrying the load.
[0039] De même, la longueur axiale L des faces d'épaulement 32 doit être telle que :Likewise, the axial length L of the shoulder faces 32 must be such that:
L ≥ * eL ≥ * e
33
[0040] Cela permet d'obtenir un bon comportement en roulage à plat.This makes it possible to obtain good behavior in flat running.
[0041] Le corps annulaire optimisé de la figure 4 permet à l'appui de soutien correspondant d'améliorer de façon sensible la valeur du rapport K entre les rigidités d'écrasement sur sol plan et sur indenteur représentatif. Avec un appui principalement réalisé avec un matériau caoutchouteux, on peut atteindre et dépasser un facteur 2,5.The optimized annular body of Figure 4 allows the corresponding support support to significantly improve the value of the ratio K between crushing rigidities on planar ground and representative indentor. With a support mainly made with a rubbery material, it is possible to reach and exceed a factor of 2.5.
[0042] Un appui de soutien qui présente un tel facteur élevé a l'avantage, pour une charge de dimensionnement donnée, de limiter fortement les efforts retransmis au centre roue lors d'un choc violent à capacité de charge en roulage à plat donnée. [0043] La figure 5 présente un corps annulaire similaire à celui de la figure 4 dans lequel les parties latérales sont prolongées par une partie complémentaire 41 en forme de parallélépipède. Ces parties latérales complémentaires comprennent une face extérieure 44 de section identique à la face 34, une face d'épaulement complémentaire 42 qui prolonge axialement la face 32 et une face 43 parallèle à 42 et disposée dans le prolongement de la face 33. L'intérêt de cette partie latérale complémentaire 41 est de permettre de respecter les limites précédentes pour / et L dans certaines configurations d'épaisseur, d'inclinaison et de largeur axiale des cloisons et de l'appui.A support support which has such a high factor has the advantage, for a given dimensioning load, strongly limit the forces transmitted to the wheel center during a violent impact load capacity in flat rolling given. Figure 5 shows an annular body similar to that of Figure 4 wherein the side portions are extended by a complementary portion 41 in the form of parallelepiped. These complementary lateral parts comprise an outer face 44 of identical section to the face 34, a complementary shoulder face 42 which axially extends the face 32 and a face 43 parallel to 42 and disposed in the extension of the face 33. The interest of this complementary lateral portion 41 is to allow to respect the preceding limits for / and L in certain configurations of thickness, inclination and axial width of the partitions and the support.
[0044] Un second mode de réalisation d'un appui selon l'invention est présenté aux figures 6 et 8. Ces figures présentent un appui 130 comporte une partie 132 de support de la charge et une partie 134 additionnelle de blocage du bourrelet du pneumatique. Cet appui 130 comporte un corps annulaire 50. Ce corps annulaire est présenté à la figure 6. Il se compose de cloisons similaires à celles de la figure 4 complétées axialement d'un côté de l'appui par des cloisons axiales 51. Ces cloisons axiales 51 ont une épaisseur sensiblement plus réduite que celle des cloisons 21. Leur fonction est de permettre de relier le sommet à la base en procurant une rigidité axiale suffisante pour pouvoir coopérer avec un bossage de sécurité pour bloquer en position un bourrelet de pneumatique et démonter l'appui par la poussée d'un galet de montage. Cette partie du corps annulaire n'a qu'une contribution marginale au port de la charge. Les motifs des cloisons du corps annulaire 50 ont ainsi une forme générale de Y.[0044] A second embodiment of a support according to the invention is shown in Figures 6 and 8. These figures have a support 130 comprises a portion 132 of the load support and an additional portion 134 of the bead of the tire lock . This support 130 comprises an annular body 50. This annular body is shown in Figure 6. It consists of partitions similar to those of Figure 4 supplemented axially on one side of the support by axial partitions 51. These axial partitions 51 have a thickness substantially smaller than that of the partitions 21. Their function is to allow to connect the top to the base by providing sufficient axial rigidity to be able to cooperate with a safety boss to lock in position a tire bead and disassemble the support by pushing a mounting roller. This part of the annular body has only a marginal contribution to the carrying of the load. The patterns of the partitions of the annular body 50 thus have a general shape of Y.
[0045] La figure 8 illustre un second ensemble 100 pneumatique 102, roue 110 et appui 130 selon l'invention. La roue 110 de cet ensemble présente comme celle de la figure 2 deux sièges de diamètres maximum Φsimax et différents. Elle se distingue de la roue 5 de la figure 2 en ce que la zone de liaison entre le disque 114 et la jante 112 est disposée du côté du siège 116 de plus grand diamètre Φs2maχ- Le pneumatique 102 comprend une bande de roulement 104, deux flancs 106 et deux bourrelets 108 de diamètres différents adaptés pour venir reposer sur les sièges 116 et 118 de la jante 112. La jante 112 comprend une portée d'appui 120 autour de laquelle repose sensiblement la partie 132 de support de l'appui 130 et, entre le siège 116 et la portée d'appui 120, une gorge circonférentielle 122. Cette gorge circonférentielle 122 a pour fonction d'accueillir la valve de roue et de permettre le montage et le démontage du bourrelet 108 du pneumatique sur le siège 116. La partie de blocage 134 de l'appui 130 vient en appui contre le flanc 126 de la gorge circonférentielle 124 pour coopérer avec le bossage de sécurité 128 du siège 116 pour bloquer en position le bourrelet 108 du pneumatique 102.FIG. 8 illustrates a second set 100 tire 102, wheel 110 and support 130 according to the invention. The wheel 110 of this set has the same as that of Figure 2 two seats of maximum diameters Φsim a x and different. It differs from the wheel 5 of Figure 2 in that the connection area between the disk 114 and the rim 112 is disposed on the side of the seat 116 of larger diameter Φs2maχ- The tire 102 comprises a tread 104, two flanks 106 and two beads 108 of different diameters adapted to rest on the seats 116 and 118 of the rim 112. The rim 112 comprises a bearing surface 120 around which substantially rests the support portion 132 of the support 130 and between the seat 116 and the bearing surface 120, a circumferential groove 122. This circumferential groove 122 serves to accommodate the wheel valve and to allow the assembly and disassembly of the bead 108 of the tire on the seat 116. The locking portion 134 of the support 130 abuts against the flank 126 of the circumferential groove 124 to cooperate with the safety boss 128 of the seat 116 to lock in position the bead 108 of the tire 102.
[0046] La figure 7 présente une forme avantageuse du profil transversal des extrémités radiales des fentes 35 et 45. Ce profil transversal est obtenu en coupant la fente par un plan de coupe sensiblement transversal à la direction moyenne de la fente.Figure 7 shows an advantageous form of the transverse profile of the radial ends of the slots 35 and 45. This transverse profile is obtained by cutting the slot by a cutting plane substantially transverse to the mean direction of the slot.
[0047] Sur la figure 7 comme sur les figures précédentes, on voit que la largeur transversale d de la fente est sensiblement constante sur l'ensemble de la hauteur radiale de la fente. Cette largeur transversale d est ici de l'ordre de 2 à 2,5 mm. Ce profil présente à son extrémité radiale un renflement de largeur supérieure à d. A cette extrémité, le profil transversal présente des courbures p supérieures à un millimètre. Sur l'exemple de la figure 7, le renflement est de forme torique avec un rayon de l'ordre de deux mm.In Figure 7 as in the previous figures, we see that the transverse width d of the slot is substantially constant over the entire radial height of the slot. This transverse width d is here of the order of 2 to 2.5 mm. This profile has at its radial end a bulge of width greater than d. At this end, the transverse profile has curvatures p greater than one millimeter. In the example of Figure 7, the bulge is toroidal shape with a radius of about two mm.
[0048] Comme les fentes 35, 45 s'étendent sur toute la hauteur radiale des corps annulaires, ce renflement est situé aux deux extrémités radiales intérieure et extérieure de la fente.As the slots 35, 45 extend over the entire radial height of the annular bodies, this bulge is located at both inner and outer radial ends of the slot.
[0049] La présence de ces renflements permet d'améliorer sensiblement la résistance en roulage à plat de l'appui tout en conservant un excellent comportement lors d'un choc sur un coin par exemple.The presence of these bulges can significantly improve the rolling resistance of the support while maintaining excellent behavior during a shock on a corner for example.
[0050] La figure 9 présente en vue partielle en perspective une coupe AA d'un appui de soutien similaire à celui de la figure 5. Le corps annulaire 30 de cet appui comprend des cloisons obliques inclinées 21 prolongées de part et d'autre par des parties complémentaires en forme de trapèze rectangle 31. Cette figure comprend aussi la base 2 de l'appui. Cette base 2 a la même dimension axiale que les cloisons du corps annulaire.Figure 9 shows a partial perspective view a section AA of a support support similar to that of Figure 5. The annular body 30 of this support comprises inclined oblique partitions 21 extended on either side by complementary parts in the form of rectangle trapezium 31. This figure also includes the base 2 of the support. This base 2 has the same axial dimension as the partitions of the annular body.
[0051] La figure 10 illustre le comportement de l'appui optimisé de la figure 9 lors d'un écrasement sur sol plan à 80°C (courbe a) et sur un indenteur demi cylindrique de diamètre 80 mm à 23°C (courbe b). Les écrasements sont réalisés l'appui étant monté sur sa jante de service. Les deux courbes a et b ont une première partie sensiblement linéaire suivie d'un maximum qui correspond au flambement des cloisons.FIG. 10 illustrates the behavior of the optimized support of FIG. 9 during a flat plane crash at 80 ° C. (curve a) and on a half cylindrical indenter of FIG. diameter 80 mm at 23 ° C (curve b). The crushes are carried out the support being mounted on its service rim. The two curves a and b have a first substantially linear portion followed by a maximum which corresponds to the buckling of the partitions.
[0052] L'appui est dimensionné pour s'écraser sur un sol plan avec un flèche /N sous sa charge de service QN Ce dimensionnement sur sol plan est de préférence effectué en considérant l'appui à sa température de fonctionnement en roulage à plat. Cette température est de l'ordre de 80°C, voire plus. Lorsque l'appui est écrasé sur l'indenteur de mi cylindrique, pour la même flèche fy il est soumis à une charge Qc. Le rapport QNIQC correspond au rapport des rigidités sol plan / indenteur. Les essais d'écrasement sur indenteur sont effectués à température ambiante. Le rapport des rigidités considéré prend ainsi en compte l'évolution du module du matériau constitutif de l'appui entre les températures ambiante et de fonctionnement. Cela pénalise sensiblement les valeurs obtenues de ces rapports.The support is sized to crash on a flat ground with an arrow / N under its service load Q N This design on ground plane is preferably carried out considering the support at its operating temperature in running at dish. This temperature is of the order of 80 ° C or more. When the support is crushed on the cylindrical mi indenter, for the same arrow fy it is subjected to a load Q c . The ratio Q N IQ C corresponds to the ratio of the ground plane / indent rigidities. The indenter crash tests are carried out at room temperature. The ratio of the rigidities considered thus takes into account the evolution of the modulus of the material constituting the support between the ambient and operating temperatures. This significantly penalizes the values obtained from these reports.
[0053] Le rapport des rigidités plan / indenteur est ici supérieur à 2,5 dans le cas d'un appui réalisé avec un mélange caoutchouteux.The ratio of plane / indent rigidities here is greater than 2.5 in the case of a support made with a rubbery mixture.
[0054] Cet appui de soutien est ainsi optimisé en raison du fait que les zones des cloisons impactées lors d'un choc transversal (ou axial) sont minimales et très régulières en fonction de l'azimut, que l'appui présente une forte rigidité axiale ce qui permet un excellent comportement et la distance D entre deux cloisons adjacentes permet un montage (et un démontage) aisés.This support support is thus optimized due to the fact that the areas of the walls impacted during a transverse (or axial) impact are minimal and very regular depending on the azimuth, the support has a high rigidity axial which allows excellent behavior and distance D between two adjacent partitions allows easy assembly (and disassembly).
[0055] L'invention n'est pas limitée aux exemples décrits et représentés et diverses modifications peuvent y être apportées sans sortir de son cadre seulement limité par les revendications suivantes. The invention is not limited to the examples described and shown and various modifications can be made without departing from its scope only limited by the following claims.

Claims

REVENDICATIONS
1. Appui de soutien destiné à être monté sur une jante à l'intérieur d'un pneumatique équipant un véhicule, pour supporter la bande de roulement de ce pneumatique en cas de perte de pression de gonflage, comportant :1. Support support intended to be mounted on a rim inside a tire fitted to a vehicle, to support the tread of this tire in the event of loss of inflation pressure, comprising:
- une base sensiblement cylindrique destinée à s'adapter autour de la jante,a substantially cylindrical base intended to fit around the rim,
- un sommet sensiblement cylindrique destiné à entrer en contact avec la partie intérieure du pneumatique située sous la bande de roulement en cas de perte de pression et laissant une garde par rapport à celle-ci à la pression nominale de fonctionnement du pneumatique, eta substantially cylindrical vertex intended to come into contact with the inner part of the tire situated under the tread in the event of loss of pressure and leaving a guard with respect thereto at the nominal operating pressure of the tire, and
- un corps annulaire reliant la base et le sommet, ledit corps étant constitué par une pluralité de cloisons de support généralement radiales, réparties sur la circonférence dudit appui et s'étendant axialement sensiblement de part et d'autre dudit appui, caractérisé en ce que :an annular body connecting the base and the top, said body being constituted by a plurality of generally radial support partitions distributed over the circumference of said support and extending axially substantially on either side of said support, characterized in that :
- chaque cloison de support a une partie centrale en forme de parallélépipède oblique avec deux faces extérieures orientées circonférentiellement disposées de part et d'autre dudit appui et deux faces inclinées relativement à la direction circonférentielle d'un angle α,each support partition has a central portion in the form of an oblique parallelepiped with two circumferentially oriented outer faces disposed on either side of said support and two faces inclined relative to the circumferential direction of an angle α,
- en ce que deux cloisons de support adjacentes forment un motif en forme de V,in that two adjacent support partitions form a V-shaped pattern,
- en ce que deux cloisons de support adjacentes sont séparées à la base du V par une fente axiale de faible largeur s'étendant radialement sur la totalité du corps annulaire, etin that two adjacent support partitions are separated at the base of the V by an axial slot of small width extending radially over the entire annular body, and
- en ce que la partie centrale de chaque cloison de support en forme de parallélépipède oblique est prolongée par deux parties latérales de forme trapézoïdale rectangle avec une face axiale, de largeur axiale donnée, dite face d'épaulement et destinée à venir s'appuyer contre une face d'épaulement similaire de la partie latérale de la cloison de support adjacente circonférentiellement, une face extérieure circonférentielle et une face inclinée relativement à la direction circonférentielle d'un angle α et prolongeant la face inclinée de la partie centrale de ladite cloison de support.in that the central portion of each oblique parallelepiped-shaped support partition is extended by two lateral portions of rectangular trapezoidal shape with an axial face, of given axial width, referred to as the shoulder face, intended to be supported against a similar shoulder face of the lateral portion of the circumferentially adjacent support partition, a circumferential outer face and a face inclined relative to the circumferential direction of an angle α and extending the inclined face of the central portion of said support partition. .
2. Appui de soutien selon la revendication 1, dans lequel chaque cloison a au moins une partie latérale prolongée axialement par une partie complémentaire de forme sensiblement de parallélépipède avec une face d'épaulement qui prolonge la face d'épaulement de la partie latérale adjacente et une face extérieure circonférentielle de section identique à la face extérieure de ladite partie latérale adjacente.2. Support support according to claim 1, wherein each partition has at least one lateral portion extended axially by a complementary portion of substantially parallelepiped with a shoulder face which extends the shoulder face of the adjacent side portion and a circumferential outer face of identical section to the outer face of said adjacent side portion.
3. Appui de soutien selon l'une des revendications 1 et 2, dans lequel, l'épaisseur de la partie centrale des cloisons étant e, la largeur circonférentielle desdites faces extérieures / est telle que :3. support support according to one of claims 1 and 2, wherein, the thickness of the central part of the partitions being e, the circumferential width of said outer faces / is such that:
4. Appui de soutien selon l'une des revendications 1 à 3, dans lequel, l'épaisseur de la partie centrale des cloisons étant e, la largeur axiale desdites faces d'épaulement L est telle que :4. support support according to one of claims 1 to 3, wherein, the thickness of the central portion of the partitions being e, the axial width of said shoulder faces L is such that:
5. Appui de soutien selon l'une des revendications 1 à 4, tel que la largeur (d) dans le sens circonférentiel des fentes est comprise entre deux et trois mm.5. support support according to one of claims 1 to 4, such that the width (d) in the circumferential direction of the slots is between two and three mm.
6. Appui de soutien selon l'une des revendications 1 à 5, dans lequel, chaque fente étant définie géométriquement par un profil transversal obtenu en coupant la fente par un plan de coupe sensiblement transversal à la direction moyenne de la fente, le profil transversal présente à ses extrémités radiales des courbures (p) supérieures à un (1) mm.6. Support support according to one of claims 1 to 5, wherein, each slot being geometrically defined by a transverse profile obtained by cutting the slot by a cutting plane substantially transverse to the mean direction of the slot, the transverse profile has at its radial ends curvatures (p) greater than one (1) mm.
7. Appui de soutien selon la revendication 6, dans lequel les courbures (p) sont comprises entre : d Support support according to claim 6, wherein the curvatures (p) are between: d
dans lequel d est la largeur transversale des fentes. in which d is the transverse width of the slots.
8. Appui selon l'une des revendications 1 à 7, dans lequel, ledit appui étant destiné à être monté sur la portée d'appui d'une roue au moyen d'un galet de montage de diamètre donné, la distance axiale séparant les faces extérieures disposées dans un même plan méridien de deux cloisons adjacentes est inférieure au diamètre dudit galet de montage.8. Support according to one of claims 1 to 7, wherein, said support being intended to be mounted on the bearing surface of a wheel by means of a mounting roller of given diameter, the axial distance separating the outer faces disposed in the same meridian plane of two adjacent partitions is smaller than the diameter of said mounting roller.
9. Appui selon l'une des revendications 1 à 8, tel que la forme des cloisons, des cloisons de blocage et des fentes est adaptée de manière à ne comprendre aucune partie en contre dépouille s'opposant à un démoulage axial de l'appui de soutien.9. Support according to one of claims 1 to 8, such as the shape of the partitions, blocking walls and slots is adapted to include no undercut portion opposing an axial release of the support Support.
10. Appui selon l'une des revendications 1 à 9, tel que le matériau constitutif dudit appui de soutien est un mélange caoutchouteux de module d'élasticité compris entre 10 et 40 MPa.10. Support according to one of claims 1 to 9, such that the material constituting said support support is a rubber mix of modulus of elasticity of between 10 and 40 MPa.
11. Appui selon l'une des revendications 1 à 9, tel que le matériau constitutif dudit appui de soutien est un élastomère de polyuréthane de module d'élasticité compris entre 20 et 150 MPa.11. Support according to one of claims 1 to 9, such that the material constituting said support support is a polyurethane elastomer modulus of elasticity between 20 and 150 MPa.
12. Appui selon l'une des revendications 1 à 9, tel que le matériau constitutif dudit appui de soutien est un élastomère thermoplastique de module d'élasticité compris entre 20 et 150 MPa.12. Support according to one of claims 1 to 9, such that the material constituting said support support is a thermoplastic elastomer modulus of elasticity between 20 and 150 MPa.
13. Appui de soutien selon l'une quelconque des revendications 1 à 12, tel que ledit appui comprend une partie additionnelle de blocage avec un sommet, une base et un corps annulaire prolongeant axialement d'un côté le sommet, la base et le corps annulaire dudit appui et tel que le corps annulaire de la partie de blocage comprend une pluralité de cloisons de blocage prolongeant axialement une fraction des cloisons de support dudit appui.Support support according to any one of claims 1 to 12, such that said support comprises an additional locking portion with a crown, a base and an annular body axially extending on one side the vertex, the base and the body annular of said support and such that the annular body of the locking portion comprises a plurality of blocking walls extending axially a fraction of the support partitions of said support.
14. Appui selon la revendication 13, dans lequel les cloisons de support en V et de blocage forment des motifs de forme générale Y. The support of claim 13, wherein the V-shaped and blocking support partitions form patterns of general shape Y.
15. Appui selon l'une des revendications 13 et 14, destiné à être enfilé autour d'une jante de roue comportant un premier siège de jante de diamètre maximum Φsimax, et un second siège de jante de diamètre maximum Φs2maχ supérieur au diamètre maximum dudit premier siège Φsimax, ledit second siège étant prolongé axialement vers le premier siège par une gorge circonférentielle et une portée d'appui dont le diamètre extérieur est sensiblement égal au diamètre maximum du premier siège Φsimax, dans lequel ladite partie de support dudit appui est adaptée pour être disposée autour de ladite portée d'appui et ladite partie de blocage est adaptée pour être disposée radialement extérieurement relativement à ladite gorge circonférentielle.15. Support according to one of claims 13 and 14, intended to be threaded around a wheel rim having a first rim seat of maximum diameter Φsim a x, and a second rim seat of maximum diameter Φs2m a χ upper at the maximum diameter of said first seat Φsim a x, said second seat being extended axially towards the first seat by a circumferential groove and a bearing surface whose outer diameter is substantially equal to the maximum diameter of the first seat Φsim a x, wherein said support portion of said support is adapted to be disposed around said bearing surface and said locking portion is adapted to be disposed radially outwardly relative to said circumferential groove.
16. Appui selon la revendication 15, dans lequel ledit second siège étant prolongé vers le premier siège par un flanc de ladite gorge circonférentielle, ladite partie de blocage dudit appui est adaptée pour venir en appui contre ledit flanc de ladite gorge.16. Support according to claim 15, wherein said second seat being extended towards the first seat by a flank of said circumferential groove, said locking portion of said support is adapted to abut against said side of said groove.
17. Appui selon l'une des revendications 15 et 16, dans lequel ladite roue comporte une jante et un disque lié à ladite jante du côté dudit second siège.17. Support according to one of claims 15 and 16, wherein said wheel comprises a rim and a disc connected to said rim on the side of said second seat.
18. Ensemble constitué par un appui selon l'une des revendications 1 à 17 et une roue avec une jante de roue comportant un premier siège de jante de diamètre maximum Φsimax, et un second siège de jante de diamètre maximum Φs2maχ supérieur au diamètre maximum dudit premier siège Φsimax, ledit second siège étant prolongé axialement vers le premier siège par une gorge circonférentielle et une portée d'appui dont le diamètre extérieur est sensiblement égal au diamètre maximum du premier siège Φsimax, caractérisé en ce que ladite roue comporte une jante et un disque lié à ladite jante du côté dudit second siège. 18. Assembly consisting of a support according to one of claims 1 to 17 and a wheel with a wheel rim having a first rim seat of maximum diameter Φsimax, and a second rim seat of maximum diameter Φs2maχ greater than the maximum diameter of said first seat Φsim a x, said second seat being extended axially towards the first seat by a circumferential groove and a bearing surface whose outer diameter is substantially equal to the maximum diameter of the first seat Φsim a x, characterized in that said wheel comprises a rim and a disk attached to said rim on the side of said second seat.
EP06764206A 2005-07-19 2006-07-19 Optimized support element Withdrawn EP1910104A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0507791A FR2888778A1 (en) 2005-07-19 2005-07-19 OPTIMIZED SUPPORT SUPPORT
PCT/EP2006/064405 WO2007010003A1 (en) 2005-07-19 2006-07-19 Optimized support element

Publications (1)

Publication Number Publication Date
EP1910104A1 true EP1910104A1 (en) 2008-04-16

Family

ID=36125246

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06764206A Withdrawn EP1910104A1 (en) 2005-07-19 2006-07-19 Optimized support element

Country Status (6)

Country Link
US (1) US20080295942A1 (en)
EP (1) EP1910104A1 (en)
JP (1) JP2009501668A (en)
CN (1) CN101223044A (en)
FR (1) FR2888778A1 (en)
WO (1) WO2007010003A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107580558A (en) * 2015-05-12 2018-01-12 米其林集团总公司 Connector for rolling assembly and the rolling assembly including it

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2948320B1 (en) 2009-07-27 2011-07-29 Michelin Soc Tech PNEUMATIC OBJECT COMPRISING A GAS SEALED LAYER BASED ON A THERMOPLASTIC ELASTOMER AND A LAMELLAR LOAD.
JP5657660B2 (en) 2009-07-31 2015-01-21 コンパニー ゼネラール デ エタブリッスマン ミシュラン Pneumatic tire with self-sealing ply fitted

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6598633B1 (en) * 1999-11-04 2003-07-29 Michelin Recherche Et Technique S.A. Tire safety support and rim and support assembly containing centering means and with facilitated mounting
FR2816549A1 (en) * 2000-11-13 2002-05-17 Michelin Soc Tech Remote monitoring road wheel safety insert having circumferential base wheel rim contacting and housing receiving wheel module with safety insert having integral antenna
FR2819218A1 (en) 2001-01-11 2002-07-12 Michelin Soc Tech METHOD FOR MOUNTING A TIRE ON A RIM, DEVICE AND TOOL FOR IMPLEMENTING A STEP OF THIS PROCESS
JP4633946B2 (en) * 2001-02-13 2011-02-16 不二精工株式会社 Run-flat tire and rim assembly
US6758250B2 (en) * 2002-05-31 2004-07-06 Michelin Recherche Et Technique S.A. Lubricant release system
JP3938353B2 (en) * 2002-10-28 2007-06-27 横浜ゴム株式会社 Mounting structure of tire internal information collection device
JP2005007928A (en) * 2003-06-16 2005-01-13 Sumitomo Rubber Ind Ltd Support ring, tire assembly using the support ring, and vehicle
FR2861649B1 (en) * 2003-11-05 2006-01-06 Michelin Soc Tech FRAGMENT SECURITY SUPPORT
FR2862023B1 (en) * 2003-11-10 2006-01-06 Michelin Soc Tech ALLEGE SAFETY SUPPORT FOR TIRES
JP3930024B2 (en) * 2004-02-17 2007-06-13 京セラ株式会社 Tire pressure information transmitting apparatus and wheel with tire pressure information transmitting apparatus using the same
US7104302B2 (en) * 2004-06-08 2006-09-12 Michelin Recherche Et Technique S.A. Run-flat support ring with internal fin

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2007010003A1 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107580558A (en) * 2015-05-12 2018-01-12 米其林集团总公司 Connector for rolling assembly and the rolling assembly including it
CN107580558B (en) * 2015-05-12 2020-02-11 米其林集团总公司 Adapter for rolling assembly and rolling assembly comprising same

Also Published As

Publication number Publication date
CN101223044A (en) 2008-07-16
WO2007010003A1 (en) 2007-01-25
JP2009501668A (en) 2009-01-22
FR2888778A1 (en) 2007-01-26
US20080295942A1 (en) 2008-12-04

Similar Documents

Publication Publication Date Title
EP0796747B1 (en) Soft elastomeric material safety ring for tyre
EP1192054B1 (en) Light safety support for tyre
EP1097823B1 (en) Rim for receiving a supporting ring
WO2007080180A1 (en) Optimized bearing structure for a supporting element, and optimized supporting element
EP1868823B1 (en) Locking ring in an assembly for mounting a tyre on a vehicle hub
WO2007010002A1 (en) Vehicle wheel with seats of unequal diameters and assembly consisting of a wheel and of a support element
EP1638786B1 (en) Tire tread comprising a ventilated sacrificial rib
EP1868824B1 (en) System for locking a mounting ring on a vehicle hub
EP1910104A1 (en) Optimized support element
EP1233874B1 (en) Safety support and support and rim assembly for tyre comprising centring means for easy mounting
EP1721759A1 (en) Segmented run-flat support
WO2018234703A1 (en) Tyre type device for vehicle
EP3934922B1 (en) Tyre comprising a tread portion
EP1912803A1 (en) Wheel and tyre assembly with non-matching seat diameters whereof the tyre comprises sidewalls wider than the rim
EP3562693B1 (en) Tyre with variable-height sidewall lugs
EP3436288B1 (en) Tyre comprising a block with incisions
WO2023186694A1 (en) Low-noise tyre for a heavy goods vehicle
EP3204241B1 (en) Tread layer for an aircraft tyre
FR2804374A3 (en) Run flat support for motor vehicle tyre has ring with locating ribs to fit onto rim seating
FR2802857A1 (en) Run flat support for motor vehicle tyre has ring with locating ribs to fit onto rim seating

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20080219

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Effective date: 20090703