WO2019108208A1 - Pneu - Google Patents

Pneu Download PDF

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Publication number
WO2019108208A1
WO2019108208A1 PCT/US2017/064014 US2017064014W WO2019108208A1 WO 2019108208 A1 WO2019108208 A1 WO 2019108208A1 US 2017064014 W US2017064014 W US 2017064014W WO 2019108208 A1 WO2019108208 A1 WO 2019108208A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
rubber material
bead
tire
modulus
Prior art date
Application number
PCT/US2017/064014
Other languages
English (en)
Inventor
Jeff HIDDE
Mary Dungan THOMAS
Paul B. Winston
Vittoria Madonna BLASUCCI
Donald Earl LEONARD
Michael Andrews
Original Assignee
Compagnie Generale Des Etablissements Michelin
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 Compagnie Generale Des Etablissements Michelin filed Critical Compagnie Generale Des Etablissements Michelin
Priority to PCT/US2017/064014 priority Critical patent/WO2019108208A1/fr
Publication of WO2019108208A1 publication Critical patent/WO2019108208A1/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
    • B60C15/0027—Tyre beads, e.g. ply turn-up or overlap features of the carcass terminal portion with low ply turn-up, i.e. folded around the bead core and terminating at the bead core
    • 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
    • B60C15/0628—Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead comprising a bead reinforcing layer
    • B60C15/0635—Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead comprising a bead reinforcing layer using chippers between the carcass layer and chafer rubber wrapped around 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
    • B60C15/00—Tyre beads, e.g. ply turn-up or overlap
    • B60C15/04—Bead cores
    • B60C2015/044—Bead cores characterised by a wrapping layer
    • 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
    • B60C2015/0614—Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead characterised by features of the chafer or clinch portion, i.e. the part of the bead contacting the rim
    • 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
    • B60C2015/0617—Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead comprising a cushion rubber other than the chafer or clinch rubber
    • 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
    • B60C2015/0617—Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead comprising a cushion rubber other than the chafer or clinch rubber
    • B60C2015/0621—Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead comprising a cushion rubber other than the chafer or clinch rubber adjacent to the carcass turnup portion
    • 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
    • B60C15/0628—Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead comprising a bead reinforcing layer
    • B60C2015/0642—Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead comprising a bead reinforcing layer between carcass turn-up and bead filler not wrapped around the bead core
    • 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
    • B60C15/0628—Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead comprising a bead reinforcing layer
    • B60C2015/065—Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead comprising a bead reinforcing layer at the axially outer side of the carcass turn-up portion not wrapped around the bead core
    • 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
    • B60C15/0628—Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead comprising a bead reinforcing layer
    • B60C2015/0678—Physical properties of the bead reinforcing layer, e.g. modulus of the 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
    • B60C5/00—Inflatable pneumatic tyres or inner tubes
    • B60C5/12—Inflatable pneumatic tyres or inner tubes without separate inflatable inserts, e.g. tubeless tyres with transverse section open to the rim
    • B60C5/14—Inflatable pneumatic tyres or inner tubes without separate inflatable inserts, e.g. tubeless tyres with transverse section open to the rim with impervious liner or coating on the inner wall of the tyre

Definitions

  • Embodiments of this disclosure relate generally to pneumatic tires, and more specifically to tubeless pneumatic tires.
  • the invention concerns the structures and production of tubeless tires having rim mounting and sealing portions each characterized as having improved resistance to rim mounting damage.
  • Tubeless pneumatic tires having one or more carcass plies extending between a pair of substantially unstretchable bead rings (which may be more simply referred to herein as “beads”), one or more carcass plies being surmounted by a crown reinforcement and a tread, the one or more carcass plies being partially wound at each of their two ends around each of the bead rings.
  • a crown reinforcement may also be referred to also as a belt or belt package.
  • Each of the one or more carcass plies and crown reinforcement being reinforced with cables or cords within a rubber matrix.
  • Embodiments of this disclosure include various pneumatic tires, which may be tubeless, the tires having: a pair of annular beads areas spaced apart axially along a rotational axis of the tire; a pair of sidewalls spaced apart axially along the rotational axis of the tire, each sidewall of the pair of sidewalls extending outwardly in a radial direction from one bead area of the pair of bead areas; and, a crown portion arranged between the pair of sidewalls.
  • a carcass ply wraps around a radial inner side of a bead ring such that the carcass ply extends along an axial outer side of the bead ring, across a radial inner side of the bead ring, and an axial inner side of the bead ring, the carcass ply comprising an array of reinforcements arranged within a matrix of elastomeric material.
  • a first layer of rubber material is arranged radially inward from both the bead ring radial inner side and the carcass ply.
  • a second layer of rubber material is arranged radially inward from each of the bead ring radial inner side, the carcass ply, and the first layer of rubber material, each of the first layer of rubber material and the second layer of rubber extending substantially across a partial or full width of the corresponding bead ring.
  • Each of the first layer of rubber material and the second layer of rubber material having a modulus of elongation, where the modulus of elongation of the first layer of rubber material is greater than the modulus of elongation of the second layer of rubber material.
  • FIG. 1 is a perspective view of a tubeless pneumatic tire, in accordance with an exemplary embodiment
  • FIG. 2 is a perspective view of a bead portion located at the radially inner end of a sidewall, in accordance with an exemplary embodiment
  • FIG. 3 is a perspective view of a bead portion located at the radially inner end of a sidewall, in accordance with the prior art.
  • Rubberer or “rubber material” as used herein, alone and without modification, indicates any natural rubber (polyisoprene), synthetic rubber, or any blend thereof.
  • Synthetic rubbers include, by example and without limitation, butadiene rubbers (BR), styrene- butadiene rubbers (SBR), isoprene, chloroprene, and isobutylene.
  • “Axial direction,”“axially,” or the letter“A d ” in the figures refers to a direction extending along the axis of rotation or a direction parallel to the axis of rotation of, for example, the outer band, the inner hub, or more generally, the non-pneumatic tire carcass.
  • “Radial direction,”“radially,” or the letter“R d ” in the figures refers to a direction that is orthogonal to the axis of rotation and extends in the same direction as any radius extending orthogonally from the rotational axis.
  • “Circumferential direction” or the letter“C d ” in the figures refers to a direction is orthogonal to an axial direction and orthogonal to a radial direction.
  • “Elastic material” or“elastomer” as used herein refers to a polymer exhibiting rubber like elasticity, such as a material comprising rubber, whether natural, synthetic, or a blend of both natural and synthetic rubbers.
  • “Elastomeric” as used herein refers to a material comprising an elastic material or elastomer, such as a material comprising rubber.
  • “Modulus” or“Modulus of elongation” was measured at 10% strain (MA10) at a temperature of 23°C based on ASTM Standard D412 on dumb bell test pieces. The measurements were taken in the second elongation; i.e., after an accommodation cycle. These measurements are secant moduli in MPa, based on the original cross section of the test piece.
  • tire 10 includes a pair of annular bead areas 12. Internally within each bead area 12 various components are arranged, including a bead ring (not shown, but shown in FIGS. 2 and 3). Each bead ring 12 is also referred to as a bead herein. Each bead ring is substantially unstretchable under the normal loading conditions observed during intended tire installation and operation, and it is appreciated that each bead ring may comprise any desired bead ring.
  • the pair of bead areas 12, as well as the pair of beads arranged therein, are spaced apart axially along a rotational axis A of the tire 10.
  • Each bead area includes a rim sealing portion 14 arranged between each bead and a radial inner side RSyo of tire 10 within bead area 12, each of the rim sealing portion 14 and radial inner side RSyo extending circumferentially (in a circumferential direction C d ) around the tire 10.
  • tire 10 also includes a pair of sidewalls 16 spaced apart axially along the rotational axis A of tire 10. Each sidewall 16 extends outwardly in a radial direction R from one bead area 12.
  • Tire 10 also includes a crown portion 18 arranged between the pair of sidewalls 16.
  • the crown portion 18 includes a tread 19 arranged along a radially outer side of the crown portion to form an outer, ground- engaging side of the tire 10. Tread 19 is employed to create traction during tire operation.
  • each bead area 12 includes a carcass ply 22 that wraps around a radial inner side RSyo of a bead ring 20 such that the carcass ply 22 extends along an axial outer side AS 0 ,2o of the bead ring 20, across the radial inner side RSi, 20 of the bead ring 20 (which is also referred to as a bottom side of the bead ring), and an axial inner side AS,, 20 of the bead ring 20.
  • carcass ply 22 may continue extending radially outward and into a corresponding sidewall 16. It is appreciated that the carcass ply may generally extend radially across the crown portion 18 and to each bead ring 20, whether the carcass ply is a continuous ply or is formed of multiple, connected portions. As appreciated by one of ordinary skill, carcass ply 22 comprises an array of reinforcements arranged within a matrix of elastomeric material (not shown). For example, such reinforcements may comprise elongate cables or cords.
  • Bead ring 20 is optionally surrounded by a rubber stiffener 21 R and an outer wrap 21w- Bead ring 20 is configured to remain rigid annularly (that is, in a hoop direction) and comprises one or more rigid reinforcements, such one or more metal reinforcements, for example.
  • bead ring 20 may comprise any desired bead known to one of ordinary skill.
  • rubber stiffener 21 R is arranged around bead 21, both in an annular direction and around the bead ring cross-section taken along a plane extending in both radial and axial directions.
  • Rubber stiffener 21 R is a rigid rubber formulation designed to increase the rigidity of bead ring 20.
  • a wrap 21w is arranged around rubber stiffener 21 R to contain the rubber stiffener 21 R .
  • Wrap 21w may consist of a rubber material that may or may not include reinforcements, such as any elongate textile or metal reinforcements, for example.
  • each bead area 12 includes a first layer of rubber material 30 arranged radially inward from both the bead ring radial inner side RSyo and the carcass ply 22.
  • Each bead area 12 also includes a second layer of rubber material 40 arranged radially inward from each of the bead ring radial inner side RSi,2o, the carcass ply 22, and the first layer of rubber material 30. It is appreciated that the first layer of rubber material 30 has a thickness t 30 and the second layer of rubber material 40 has a thickness t 40 .
  • the first layer thickness t 30 is at least substantially 1 millimeter (mm) and upwards of substantially 50% of the combined thickness (t 3 o + t-io) of the first layer of rubber material 30 and the second layer of rubber material 40 or substantially 50% of a distance extending in the direction of each layer thickness t 3 o, t 4 o between the carcass 22 and the inner radial side S o of tire 10 .
  • the second layer thickness t 4 o is at least substantially 1 millimeter (mm) and as great as a thickness that fills the distance remaining between the carcass 22 and the inner radial side S o of tire 10 when the first layer 30 is at a minimum thickness t 3 o (e.g., 1 mm).
  • a minimum thickness t 3 o e.g. 1 mm.
  • the portion of each first and second layer of rubber material 30, 40 arranged below a bead ring 20 is the portion extending partially across or substantially the full width W20 or W20’ of the bead ring 20. Accordingly, it is appreciated that the thickness t 3 o, t 4 o of other portions of each layer 30, 40 may be greater or less than the minimums and maximums described above.
  • Each of the first and second layers of rubber material 30, 40 are formed of different rubber material having different rigidities, that is, having different flexibility qualities.
  • the first layer of rubber material 30 is more rigid (that is, less flexible) than the second layer of rubber material 40.
  • the increased rigidity of the first layer of rubber material 30 reinforces the carcass ply 22, with the first layer of rubber material being arranged adjacent to the carcass ply 22 (as is more fully described below). Accordingly, damage to the carcass ply is reduced due to the additional reinforcement.
  • the modulus of elongation of the first layer of rubber material 30 is greater than the modulus of elongation of the second layer of rubber material 40.
  • the modulus of elongation of the first layer of rubber material 30 is equal to at least 125%, is equal to 125% to 250%, or is equal to 150% to 200% of the modulus of elongation of the second layer of rubber material 40.
  • the first layer of rubber material 30 has a modulus of elongation that is substantially equal to or greater than, that is, not less than, the modulus of elongation of the rubber material forming the carcass ply 22.
  • the modulus of elongate of the rubber material forming the carcass ply 22 is 10 MPa, although it could be a value greater or less than 10 MPa in other variations. Further, in certain exemplary instances, the modulus of elongation for the first layer of rubber material 30 is as great as substantially 14 MPa (and therefore ranging from 10 to 14 MPa in certain more particular exemplary instances), while the modulus of elongation for the second layer of rubber material 40 is substantially 7.5 MPa, or more generally 6 MPa to 8 MPa.
  • first and second layers of rubber material 30, 40 may be each be formed of any desired rubber to achieve the rigidity or elongation properties described herein. Rubber may comprise natural rubber, synthetic rubber, or any rubber blend as noted previously. It is further appreciated that synthetic rubber may include any additives to achieve the material properties desired. It is appreciated that each of the first and second layers of rubber material 30, 40 are formed substantially or completely of rubber material, such that each does include any reinforcements, such as, for example and without limitation, any elongate cables or cords.
  • radial inner side S o of tire 10 within bead portion 12 forms a rim sealing portion 14, which generally extends linearly in cross-section between a first transition T1 and to a second transition T2, where at the first transition T1 sealing portion transitions to an exterior side 10S e of the tire and where at the second transition T2 sealing portion transitions to an interior side lOS, of the tire 10, the exterior side 10S e of the tire being located axially outward from the inner side of the tire.
  • First transition T1 is referred to as a heel and the second transition T2 is referred to as a toe.
  • Line L RIM is a reference line representing a portion of a rim upon which the rim sealing portion 14 is intended to engage when tire 10 is properly mounted on a rim.
  • the angularity of line L RIM is biased from rim sealing portion RSyo by angle Q as measured from an origin located along the rim sealing portion RS o at the first transition T1 in a direction such that the line L RIM extends towards the interior side lOS, of the tire between the second transition T2 and the bead ring 20.
  • angle Q is substantially 15 degrees while in broader instances, angle Q is substantially in the range of 0 to 15 degrees.
  • bead ring 20 has a width W20.
  • first layer of rubber material 30 extends substantially across the full bead width W20.
  • the width of the bead ring 20 can be measured in an axial direction of the tire 10, with the tire in a molded or unmounted configuration.
  • This alternative measurement of the bed ring width is represented by W2o’ ⁇
  • first layer 30 extends partially or at least 50% across width W20, W2o’ ⁇
  • second layer 40 may extend partially, at least 50%, or substantially across width W20, W2o’ ⁇ With reference to FIG.
  • first layer 30 extending substantially across a full width of the bead ring 20 is contrary to prior art bead areas 112, where no first layer of rubber material is arranged below the bead ring 20 let alone extending substantially across the full bead width W20.
  • an outer shear layer 80 is arranged along an axially outer side of the bead area 112 between a portion of second layer of rubber material 140 and reinforcement, where the outer shear layer 80 is flexible for the purpose of reducing strain densities along reinforcement ply 60.
  • the outer shear layer 80 has a modulus of elongation generally ranging from 3 to 6 MPa in certain embodiments. Therefore, second layer of rubber material 140 is the only rubber material arranged between carcass ply 22 and the rim sealing portion.
  • first layer of rubber material 30 may extend further toward the interior side lOS, of the tire.
  • first layer of rubber material 30 continues to an inner terminal end 30E, located beyond a line LRAD extend in a radial direction from a radially inner and axially inner corner of the bead 20.
  • first layer of rubber material 30 extends to an inner terminal end 30E, that is overlapped by an outer terminal end 50E o of an inner liner ply 50, the inner liner ply 50 being an air impermeable layer of material that prevents the leakage of air through the tire between the seals formed along each pair of bead areas 12.
  • the first layer of rubber material 30 is also overlapped by a second liner ply 52, which is formed of rubber material configured to react with oxygen to thereby prevent migration of oxygen.
  • the second liner ply 52 is arranged between the inner liner ply 50 and the carcass ply 22.
  • inner terminal end 30E overlaps outer terminal end 50E o of inner liner ply 50, the inner liner ply 50 being an air impermeable layer of material that prevents the leakage of air through the tire between the seals formed along each pair of bead areas 12.
  • first layer of rubber material 30 is also overlapped by a second liner ply 52, Regardless, in other variations, it is appreciated that first layer of rubber material 30 may or may not terminate at an inner terminal end 30Ei prior to reaching an inner axial side AS,, 20 of the bead 20 or a corresponding sidewall 16.
  • first layer of rubber material 30 may also extend further towards the exterior side 10S e of the tire, whereby outer terminal end 30E o is arranged at any location from the radial inner side RSi, 2 o to the axial outer side AS 0 , 2 o and beyond to a corresponding sidewall 16.
  • the first layer of rubber material 30 terminates at an outer terminal end 30E o located substantially at the axially outer extent of the bead width W 2 o.
  • outer terminal end 30E o of first layer 30 is located prior to reaching a reinforcement ply 60 located along an outer axial side AS 0 , 2 o of the bead 20, the reinforcement ply 60 extending radially outward towards a corresponding sidewall 16 to terminate at a location within the bead area 12 below a radial terminal end of a rubber filler 70.
  • Reinforcement ply 60 is a rubber matrix containing an array of elongate reinforcements, such as metal reinforcements, for example, but in other variations may comprise any desired reinforcement ply.
  • the reinforcement ply 60 is arranged between the first layer of rubber material 30 and bead 20, and extends from an outer axial side AS 0 , 2 o of the bead 20 and radially outward to terminate at a location within the bead area 12 below a radial terminal end 70E o of a rubber filler 70.
  • Rubber filler 70 is a rigid rubber material arranged along a radial outer side RS 0 , 2 o and extends radially outward to a terminal end within the bead area 12, where a thickness of the rubber filler 70 narrows as the rubber filler extends radially outward to its radial outer terminal end 70E o .
  • rubber filler 70 is characterized as having a triangular cross-section shape in a plane extending radially and axially.
  • second layer of rubber material 40 may extend further toward the interior and/or exterior sides lOS,, 10S e of the tire.
  • the second layer of rubber material 40 within each bead area 12 extends from an exterior side 10S e of the tire to an interior side lOS, of the tire.
  • the second layer of rubber material 40 is arranged to form an exterior surface of the tire, although in other variations, second layer may remain internal (at least partially) with one or more additional layers of material arranged external to the second layer.
  • first and second layers of rubber material 30, 40 as described herein, improved resistance to mounting and dismounting damage is achieved by virtue of the more rigid first (inner) layer 30 better protecting the carcass ply 22 by isolating the carcass ply 22 from the mounting and dismounting forces observed by the second (outer) layer 40.
  • the bead area construction shown in FIGS. 2-4 represent bead area constructions employed by any over-the-road or off-road truck tires, as there is a greater propensity for experience bead- area damage due to the more frequent mounting and dismounting of tires, which are often retreaded and returned to service.
  • utilization of the inner and outer layers of rubber material 30, 40 as described and contemplated herein may be employed by other pneumatic tires, such as passenger car tires, light truck tires, high performance tires, and motorcycle tires, for example.

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

Abstract

L'invention concerne un pneu comportant une paire de zones de talon annulaires (12), une paire de flancs latéraux, et une partie couronne. Une nappe de carcasse (22) s'enroule autour d'un côté interne radial (RSj, 2o) de chaque anneau de talon (20) ; pour chaque zone de talon (12), une première couche de matière caoutchouc (30) est disposée radialement vers l'intérieur à partir du côté intérieur radial d'anneau de talon (RSj, 2o) et de la nappe de carcasse (22), et une seconde couche de matière caoutchouc (40) est disposée radialement vers l'intérieur à partir de la première couche de matière caoutchouc (30) ; tant la première couche de matière caoutchouc (30) que la seconde couche de matière caoutchouc (40) s'étendent sensiblement sur la largeur totale (W20) de l'anneau de talon (20) correspondant ; tant la première que le seconde couche de matière caoutchouc (30, 40) présentent un module d'allongement, le module d'allongement de la première couche de matière caoutchouc (30) étant plus grand que le module d'allongement de la seconde couche de matière caoutchouc (40).
PCT/US2017/064014 2017-11-30 2017-11-30 Pneu WO2019108208A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/US2017/064014 WO2019108208A1 (fr) 2017-11-30 2017-11-30 Pneu

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2017/064014 WO2019108208A1 (fr) 2017-11-30 2017-11-30 Pneu

Publications (1)

Publication Number Publication Date
WO2019108208A1 true WO2019108208A1 (fr) 2019-06-06

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0422605A2 (fr) * 1989-10-11 1991-04-17 The Yokohama Rubber Co., Ltd. Bandages pneumatiques pour voitures
JP2011246086A (ja) * 2010-05-31 2011-12-08 Yokohama Rubber Co Ltd:The 空気入りタイヤ
EP3156256A1 (fr) * 2015-10-14 2017-04-19 Sumitomo Rubber Industries Limited Pneumatique

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0422605A2 (fr) * 1989-10-11 1991-04-17 The Yokohama Rubber Co., Ltd. Bandages pneumatiques pour voitures
JP2011246086A (ja) * 2010-05-31 2011-12-08 Yokohama Rubber Co Ltd:The 空気入りタイヤ
EP3156256A1 (fr) * 2015-10-14 2017-04-19 Sumitomo Rubber Industries Limited Pneumatique

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