WO2002030690A1 - Pneumatique a talon souple - Google Patents

Pneumatique a talon souple Download PDF

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Publication number
WO2002030690A1
WO2002030690A1 PCT/EP2001/011568 EP0111568W WO0230690A1 WO 2002030690 A1 WO2002030690 A1 WO 2002030690A1 EP 0111568 W EP0111568 W EP 0111568W WO 0230690 A1 WO0230690 A1 WO 0230690A1
Authority
WO
WIPO (PCT)
Prior art keywords
bead
tire
tire according
carcass
cords
Prior art date
Application number
PCT/EP2001/011568
Other languages
English (en)
Inventor
Roger C. Cottrell
Walter L. Willard, Jr.
Original Assignee
Societe De Technologie Michelin
Michelin Recherche Et Technique S.A.
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 Societe De Technologie Michelin, Michelin Recherche Et Technique S.A. filed Critical Societe De Technologie Michelin
Priority to AU2002219034A priority Critical patent/AU2002219034A1/en
Publication of WO2002030690A1 publication Critical patent/WO2002030690A1/fr

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
    • B60C15/00—Tyre beads, e.g. ply turn-up or overlap
    • B60C15/0009—Tyre beads, e.g. ply turn-up or overlap features of the carcass terminal portion
    • B60C15/0018—Tyre beads, e.g. ply turn-up or overlap features of the carcass terminal portion not folded around the bead core, e.g. floating or down ply
    • 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
    • B60C15/00—Tyre beads, e.g. ply turn-up or overlap
    • B60C15/06—Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead
    • 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
    • B60C17/0009—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor comprising sidewall rubber inserts, e.g. crescent shaped inserts
    • 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
    • B60C17/0009—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor comprising sidewall rubber inserts, e.g. crescent shaped inserts
    • B60C17/0018—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor comprising sidewall rubber inserts, e.g. crescent shaped inserts two or more inserts in each sidewall portion

Definitions

  • the invention relates to a tire, more specifically to a pneumatic tire capable of continued mobility in a deflated condition.
  • tires which normally operate in an inflated condition but which also permit a limited operation in a deflated condition.
  • These tires constructions are generally formed of one or more generally radial carcasses which are turned up around one or more bead wires arranged in each bead.
  • sidewalls which are reinforced and thickened by interposing additional rubber layers between the carcasses or between the carcasses and the tire inner liner.
  • Inflated and deflated performance also depends on the carcass structural arrangement, materials and on the carcass path.
  • the carcass path is such that, in operation, at least a portion of the carcass may be placed in a compressive stress due to its position at the axially outward side of the bead/sidewall structure.
  • Tensile-compressive cyclic stress may affect the product durability. For instance tires having carcasses turned up around bead wires necessarily have a discontinuity at the radially uppermost extent of the turned up portion of one or more of the carcasses.
  • the invention provides a tire comprising at least one carcass structure anchored in each side of the tire in a bead, each bead having a base which is intended to be mounted on the tire's design mounting rim, each bead being extended radially upward by a sidewall portion, a reinforced summit, the sidewall portions joining said summit, wherein said bead further comprises an anchoring zone for anchoring said carcass in said bead and a heel portion provided with elastomeric filler having a modulus of elasticity substantially lower than the anchoring zone elastomeric filler modulus.
  • Such a heel portion provides a lower seating pressure.
  • the "fulcrum" effect which provides a tendency for unseating of the bead, is reduced.
  • Comfort and mountability are also improved.
  • a potential reduction in steel mass in the bead region may provide a reduced mass.
  • the heel portion has a Shore A hardness of about 55 to 65, and a modulus at 10 % of 2 to 6 MPa.
  • a "modulus at 10 %" of an elastomeric filler means a secant extension modulus obtained at an uniaxial extension deformation of the order of 10 % at ambient temperature.
  • the heel portion is preferably disposed in the axially substantially outermost portion of the bead, advantageously in the radially substantially innermost portion of the bead.
  • the heel portion extends axially inward, advantageously up to a position substantially adjacent to the median reference profile of the bead.
  • at least a section of said heel portion extends substantially radially outward, advantageously up to the radially outermost portion of the mounting surface side of the bead.
  • This extending portion provides a soft zone or decoupling zone enhancing comfort.
  • the "fulcrum" effect is reduced, minimizing the risks for unseating.
  • the bead further comprises a toe portion provided with elastomeric filler having a modulus of elasticity substantially the same or higher than the anchoring zone elastomeric filler modulus.
  • the toe portion is advantageously disposed axially and radially inward with respect to the anchoring zone.
  • Such a toe portion provides emphasized placement in the toe region.
  • the simultaneous use of the toe and heel portions contributes to increase the gap between the mechanical effects provided by each one of said heel and said toe with respect to the placement of the bead.
  • the very hard elastomeric mix for instance up to or even greater than 60 MPa improves deflated bead retention, for instance in preventing unseating of toe region during deflated operation cornering.
  • the bead further comprises a carcass cooperating element provided radially outward of the bead and axially outward of the carcass structure.
  • the carcass cooperating element is advantageously provided with a substantially curvilinear profile adapted to cooperate with the carcass structure from the top of the anchoring zone towards a radially and axially outermost zone of the sidewall.
  • the carcass cooperating element may provide a support, a guide or an orientation zone for the carcass structure.
  • Optimal carcass path may be better provided with such a cooperating element or surface.
  • it may advantageously be provided to guide or orient the carcass in accordance with a path having minimum probabilities to be under a compressive stress during operation both in inflated and in deflated conditions .
  • the anchoring zone is provided with at least one first bead reinforcement, axially bordering said carcass structure, for anchoring said at least one carcass structure in the beads.
  • the bead reinforcement advantageously includes substantially circumferentially oriented cords laterally bordering the carcass structure on at least one side and taking up the tension developed in the carcass during inflated or deflated use of the tire.
  • the tire also preferably comprises a second bead reinforcement, for instance axially outwardly spaced apart from said first bead reinforcement.
  • This second bead reinforcement advantageously includes substantially circumferentially oriented cords.
  • Figure 1 illustrates the lower sidewall and bead portion of a runflat tire according to the invention, taken along a meridian plane through the axis of rotation;
  • Figure 2 illustrates the lower sidewall and bead portion of a second embodiment of a runflat tire according to the invention, taken along a meridian plane through the axis of rotation;
  • Figure 3 illustrates the lower sidewall and bead portion of a third embodiment of a runflat tire according to the invention, taken along a meridian plane through the axis of rotation;
  • Figure 4 illustrates the lower sidewall and bead portion of a fourth embodiment of a runflat tire according to the invention, taken along a meridian plane through the axis of rotation.
  • Figure 5 illustrates the sidewall and bead portion of a fifth embodiment of a runflat tire according to the invention, taken along a meridian plane through the axis of rotation, and having three carcasses layers in the sidewall and two in the bead;
  • Figure 6 is an enlarged perspective view of the bead portion of a runflat tire corresponding to the fifth embodiment of the invention showing the common circumferential disposition of the first and second carcass layers.
  • Ring and radially mean directions radially toward or away the axis of rotation of the tire.
  • Angle defined with respect to an axial direction means an angle measured axially and radially outwardly from the innerside of the tire; such an angle is between 0 and 180 degrees.
  • the tire of the invention comprises a bead 1 provided with a seat 13, specially adapted to fit on the tire's mounting rim.
  • the bead extends substantially radially to the sidewall 15. The remaining portion of the sidewall and the tire summit are well known and thus not illustrated.
  • the tire comprises a carcass structure 10, extending from bead to bead or leaving a gap between two half structures, for instance in the substantially median portion of the summit.
  • the radially inwardmost extent of the carcass structure 10 terminates in an anchoring zone 4 of the bead 1.
  • the carcass structure is not turned up around bead cores or other bead reinforcement. That is to say, each axial coordinate defining the profile of the carcass structure has a unique radial position for each radial position less than that of the tire equator.
  • the carcass structure is anchored in the bead portion by a bead reinforcement.
  • a preferred embodiment of such a reinforcement comprises a cord arrangement 11 provided with at least one substantially circumferentially oriented cord 12 laterally bordering the carcass structure on at least one side.
  • "anchored" in the bead portion means that the arrangement resists the tension developed in the carcass structure during inflated or deflated use of the tire by the adherence of the carcass reinforcing structure laterally with the cords 12 rather than being wound around a traditional bead core.
  • the mechanical properties of the anchoring zone 4 are optimized in using a elastomeric bead filler having a very high elastic modulus.
  • typical values may be within the following range: the shore A hardness may be equal or greater than 95 and the modulus at 10 % greater than 60 MPa.
  • the bead 1 further comprises a heel portion 3 provided with elastomeric filler having a modulus of elasticity substantially lower than the anchoring zone 4 elastomeric filler modulus.
  • a Shore A hardness between 55 and 65 is advantageously provided with a 10% modulus of 2 to 6 MPa.
  • the heel portion 3 is disposed in the bottom portion of the outer corner of the bead.
  • the illustrated example is L-shaped, extending in the bottom portion towards the anchoring zone 4 and in the upper portion towards the sidewall 15, forming a wing 5.
  • the bottom portion may extend up to a position substantially adjacent to the median reference profile 20 of the bead, or even further if necessary.
  • the wing 5 is enclosed between the substantially central or interior bead portion 6, disposed radially internally, and an outer layer of elastomeric material forming the bead side 14. This bead side is intended to be in contact with the flange of the tire's design rim.
  • the wing 5 of the heel portion 3 may extend radially for instance up to the radially outermost portion of the bead mounting side layer 14 or even further if necessary.
  • the outer layer 14 is advantageously provided with a material being tear resistant and having a substantially high modulus, that is to say a Shore A hardness between 65 and 75 and a modulus at 10 % between 6 and 10 MPa. In the embodiments presented here, the layer 14 envelops the whole of the bead sides in order to protect it during the various mounting and dismounting operations.
  • the heel portion 3 can have other forms, for instance, it can have a shape similar to a boomerang.
  • the inner bottom corner portion of the bead provides a toe portion 2, advantageously made with an elastomeric filler having a modulus of elasticity substantially the same or higher than the anchoring zone elastomeric filler modulus.
  • the toe portion is substantially adjacent to the radially innermost portion of the anchoring zone 4.
  • the substantially central or interior bead portion 6 is advantageously provided with the same elastomeric filler as the anchoring zone 4, or with a material having similar characteristics. In a variant, it could also be provided with an elastomeric filler having a modulus at 10 % between 20 and 40 MPa.
  • the substantially central or interior bead portion 6 extends radially externally for instance up to a portion forming an interface between the bead and the sidewall.
  • the axially inward portion of the radially outermost portion of the interior bead portion 6 constitutes a hard or resistant portion on which the carcass structure 10 can rest.
  • This part 9 of the central part 6 of the bead can be considered as a carcass cooperating element, or support, or guide, adapted to cooperate with the adjacent portion of the carcass structure 10.
  • the profile is advantageously convex.
  • Such a configuration creates a specific path of the carcass structure 10 which is substantially aligned with the bead general profile in the anchoring zone 4 and with a slight curved profile towards the outer portion of the tire in the radially outer portion of the bead.
  • the carcass structure profile may be slightly curved in the opposite direction, to continue its path in the elastomeric bead filler 7 of the sidewall 15 according to a path substantially corresponding to the general path of the sidewall, but with the structure 10 advantageously disposed in the axially outer portion of the sidewall with respect to the median reference profile 20.
  • curve profiles as well as their axial and radial positions may vary in accordance with the type of tire, its architecture and the desired characteristics.
  • the runflat tire of the invention may comprise one or several runflat inserts placed between the carcass structure 10 and the inner side of the tire.
  • the sidewall innerside may comprise an airtight innerliner 8.
  • the low modulus heel portion 3 of the bead provides two advantages. First, it reduces the seat popping pressure, that is the tire cavity pressure utilized to place the beads of the tire upon their seats on the rim during the mounting operation. This pressure can be under, for instance, 40 psi.
  • a second advantage of this part 3 is to act as a decoupling zone during deflated operation with cornering forces. In such a case, the tire sidewall is strongly bent and the bead is also bent around the upper rim flange. This flange acts as a leverage point, which tends to separate the seat 13 of the bead 1 from the seat of the rim.
  • the soft heel portion 3 limits this separation and cooperates with the hard toe portion to keep in place the bead on the seat of the rim. This provides better performances in deflated operation of the tire.
  • the tire may further comprises a second bead reinforcement 21 , axially outwardly spaced apart from said first bead reinforcement.
  • This second bead reinforcement 21 includes at least one substantially circumferentially oriented cord 22, having either a substantially generally radial path as illustrated in figure 2, or a substantially generally inclined profile, as illustrated in figure 3.
  • the second bead reinforcement is disposed substantially axially, along the outer portion of the bead portion 6, bordering the wing 5.
  • the second bead reinforcement is disposed transversally, extending from the radially and axially inward portion of the anchoring zone 4 towards the radially outward portion of the wing 5.
  • Such an arrangement may provide easier mounting characteristics.
  • This second bead reinforcement increases the torsional and bending stiffness of the bead, this improves the performance of the tire in deflated operation conditions.
  • the cords 12 and 22 are advantageously made of steel. Monofilament or cable structure cords may be used. Textiles type cords, such as aramid, nylon, PET, PEN, or hybrids such as aramid/nylon, etc., may also be used alone or in combination with metallic cords.
  • Figure 2 illustrates an example whereas the different zones A, B and C comprise different types of cords. For instance, zone A and C have steel type cords and zone B has textile type cords.
  • Figure 4 illustrates an embodiment of the tire of the invention in which the bead reinforcement and the anchoring zone define an angle ⁇ between 110 to 140 degrees with respect to an axial direction, the tire being in a similar position as when mounted on its design mounting rim and inflated at a nominal pressure. Accordingly, the carcass structure 10 path is, radially outward from the anchoring zone, completely in the outer side of the bead and of the sidewall.
  • Figure 5 illustrates a fifth embodiment of the invention in which the carcass structure 10 has more than one carcass layer within some portion of the tire.
  • the carcass structure 10 comprises one circumferential alignment of cords in the summit 30.
  • the carcass structure 10 is divided in three circumferential alignments of radial cords 511 , 512 and 52. These three circumferential alignments of cords progressively move axially away from each other.
  • the two circumferential alignments of cords 511 and 512 join and give a common circumferential alignment of cords 51. Accordingly, in the bead 1 , there are two circumferential alignments of cords 51 and 52.
  • This carcass structure is very flexible and allows placing the carcass cords where they are most useful.
  • the density of cords of carcass layer 52 is superior to the carcass density of cords of the carcass layers 511 and 512.
  • the cords of the outer carcass layer are subjected to high-tension stress-strain cycles in inflated and deflated operation. These cords are well designed to support these high-tension cycles and the number of cords is defined accordingly.
  • the cords of the inner carcass layer are subjected in deflated operation to stress-strain cycles with compression. In this case, it is the rubber mixes, which are well designed to support these compression stresses. The number of cords needs not to be high.
  • the anchoring of the carcass structure 10 is achieved by three windings 41 , 42, 43 of circumferential oriented cords, which axially border the two circumferential alignments of cords 51 and 52 of the carcass structure with the interposition of a high modulus rubber layer.
  • runflat inserts are placed in the sidewall between the carcass layers 511-512 - insert 92 - and 512-52 - insert 93 -, and also between the carcass structure 10 and the inner side of the tire - insert 91 - in order to have a good 0-psi performance.
  • these runflat inserts are in direct contact of the cords of the adjacent carcass layers. This means that the rubber mixes constituting the runflat inserts are in intimate contact with at least part of the outer circumference of the cord, and that during the building of the tire, no usual cushion rubber mix of low modulus of elasticity has been used. Accordingly, the sidewall structure has a better durability in deflated operation.
  • Figure 6 illustrates the structure of the radial and circumferential cords in the bead 1 of the fifth embodiment.
  • the anchoring zone axially outward, we have the first circumferentially oriented winding 41 , the first carcass circumferential alignment 51 , the second circumferentially oriented winding 42, the second carcass circumferential alignment 52 and the third circumferentially oriented winding 43.
  • the first carcass circumferential alignment 51 is divided in two carcass circumferential alignments 511 and 512.
  • the rubber mixes are not represented in this figure for clarity. All these cords are embedded, at least in the anchoring zone, by a high modulus rubber mix.
  • this rubber mix has a shore A hardness over 80 and preferably over 95. All the carcass cords presented in figure 6 are placed with a circumferentially shifted position, which allows them to form one sole alignment in the summit portion of the tire. This allows minimizing the thickness of the summit portion.
  • the carcass structure can also present one circumferential alignment of cords in the summit and the bead, which divide in two or three in the sidewall.
  • the tire In order to position the reinforcement cords as precisely as possible, it is very advantageous to build the tire on a rigid support, for instance a rigid core imposing the shape of its inner cavity. All the components of the tire, which are disposed directly in their final place, are applied onto this core in the order required by the final architecture, without undergoing shaping at any moment of the building. In this case, the tire can be molded and vulcanized in the manner explained in US 4,895,692.

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

Abstract

L'invention concerne un pneumatique comprenant au moins une structure de carcasse (10) ancrée de chaque côté dudit pneumatique dans un talon, ledit talon possédant une base destinée à être montée sur la jante de montage du pneumatique, chaque talon s'étendant radialement vers le haut vers une partie de nappe de toile reliée à une bande de roulement. Le talon comprend également une zone d'ancrage (4) permettant d'ancrer la carcasse dans le talon, et une partie talon (3) dotée d'un bourrage sur tringle élastomère présentant un module d'élasticité sensiblement inférieur au module de bourrage sur tringle élastomère de la zone (4) d'ancrage.
PCT/EP2001/011568 2000-10-10 2001-10-08 Pneumatique a talon souple WO2002030690A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002219034A AU2002219034A1 (en) 2000-10-10 2001-10-08 Tire bead with soft heel

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
USPCT/US00/27878 2000-10-10
US0027878 2000-10-10

Publications (1)

Publication Number Publication Date
WO2002030690A1 true WO2002030690A1 (fr) 2002-04-18

Family

ID=21741866

Family Applications (1)

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PCT/EP2001/011568 WO2002030690A1 (fr) 2000-10-10 2001-10-08 Pneumatique a talon souple

Country Status (2)

Country Link
AU (1) AU2002219034A1 (fr)
WO (1) WO2002030690A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004009380A1 (fr) * 2002-07-23 2004-01-29 Societe De Technologie Michelin Pneumatique avec ancrage non-lineaire de structure de renfort
EP1428690A1 (fr) * 2002-12-11 2004-06-16 Société de Technologie Michelin Bourrelet de pneumatique facilitant le montage
EP1516752A1 (fr) * 2003-09-22 2005-03-23 The Goodyear Tire & Rubber Company Configuration de talon de pneumatique
WO2011079013A1 (fr) * 2009-12-23 2011-06-30 The Goodyear Tire & Rubber Company Pneu à flancs renforcés
US8539999B2 (en) 2008-12-16 2013-09-24 The Goodyear Tire & Rubber Company Tire with chafer
US20170036491A1 (en) * 2014-04-28 2017-02-09 Sumitomo Rubber Industries, Ltd. Pneumatic tire

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5488501A (en) * 1977-12-24 1979-07-13 Bridgestone Corp Pneumatic tubeless tire
EP0376172A1 (fr) * 1988-12-30 1990-07-04 The Yokohama Rubber Co., Ltd. Pneu à carcasse radiale
EP0659596A2 (fr) * 1993-12-21 1995-06-28 Bridgestone Corporation Bandage pneumatique pour avions
US5511599A (en) * 1994-01-18 1996-04-30 Michelin Recherche Et Technique S.A. Run-flat tire with three crescent-shaped reinforcing members
EP0869017A1 (fr) * 1997-04-02 1998-10-07 Compagnie Générale des Etablissements MICHELIN-MICHELIN & CIE Pneumatique à armature de carcasse perfectionnée

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5488501A (en) * 1977-12-24 1979-07-13 Bridgestone Corp Pneumatic tubeless tire
EP0376172A1 (fr) * 1988-12-30 1990-07-04 The Yokohama Rubber Co., Ltd. Pneu à carcasse radiale
EP0659596A2 (fr) * 1993-12-21 1995-06-28 Bridgestone Corporation Bandage pneumatique pour avions
US5511599A (en) * 1994-01-18 1996-04-30 Michelin Recherche Et Technique S.A. Run-flat tire with three crescent-shaped reinforcing members
EP0869017A1 (fr) * 1997-04-02 1998-10-07 Compagnie Générale des Etablissements MICHELIN-MICHELIN & CIE Pneumatique à armature de carcasse perfectionnée

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 003, no. 112 (M - 073) 18 September 1979 (1979-09-18) *

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004009380A1 (fr) * 2002-07-23 2004-01-29 Societe De Technologie Michelin Pneumatique avec ancrage non-lineaire de structure de renfort
US7210512B2 (en) 2002-07-23 2007-05-01 Michelin Recherche Et Technique S.A. Tire with non-linear anchoring of the reinforcement structure
CN100391753C (zh) * 2002-07-23 2008-06-04 米其林技术公司 具有非直线固定加强件的轮胎
EP1428690A1 (fr) * 2002-12-11 2004-06-16 Société de Technologie Michelin Bourrelet de pneumatique facilitant le montage
US6880601B2 (en) 2002-12-11 2005-04-19 Michelin Recherche Et Technique S.A. Tire bead facilitating mounting
CN100351106C (zh) * 2002-12-11 2007-11-28 米其林技术公司 便于安装的轮胎胎边
EP1516752A1 (fr) * 2003-09-22 2005-03-23 The Goodyear Tire & Rubber Company Configuration de talon de pneumatique
US6966351B2 (en) 2003-09-22 2005-11-22 The Goodyear Tire & Rubber Company Tire bead configuration
US8539999B2 (en) 2008-12-16 2013-09-24 The Goodyear Tire & Rubber Company Tire with chafer
WO2011079013A1 (fr) * 2009-12-23 2011-06-30 The Goodyear Tire & Rubber Company Pneu à flancs renforcés
US20170036491A1 (en) * 2014-04-28 2017-02-09 Sumitomo Rubber Industries, Ltd. Pneumatic tire
US10518592B2 (en) * 2014-04-28 2019-12-31 Sumitomo Rubber Industries, Ltd. Pneumatic tire

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