WO2006071228A1 - Pneumatique a mobilite accrue presentant une configuration asymetrique de materiaux entre les carcasses - Google Patents

Pneumatique a mobilite accrue presentant une configuration asymetrique de materiaux entre les carcasses Download PDF

Info

Publication number
WO2006071228A1
WO2006071228A1 PCT/US2004/043956 US2004043956W WO2006071228A1 WO 2006071228 A1 WO2006071228 A1 WO 2006071228A1 US 2004043956 W US2004043956 W US 2004043956W WO 2006071228 A1 WO2006071228 A1 WO 2006071228A1
Authority
WO
WIPO (PCT)
Prior art keywords
tire
inter
sidewall
carcass
carcass structures
Prior art date
Application number
PCT/US2004/043956
Other languages
English (en)
Other versions
WO2006071228A8 (fr
Inventor
Walter Lee Willard
Original Assignee
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 Michelin Recherche Et Technique S.A. filed Critical Michelin Recherche Et Technique S.A.
Priority to PCT/US2004/043956 priority Critical patent/WO2006071228A1/fr
Publication of WO2006071228A1 publication Critical patent/WO2006071228A1/fr
Publication of WO2006071228A8 publication Critical patent/WO2006071228A8/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
    • B60C17/00—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor
    • 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.
  • wheels are available which are equipped with supports capable of supporting the inside of the tread of a tire in the event of sagging of the sidewalls following a drop in pressure.
  • This solution is advantageously combined with a tire comprising a bottom zone capable of minimising the risk of the tire sliding out of the rim.
  • This solution is advantageous since it makes it possible to keep substantially intact the characteristics of travel under normal conditions.
  • it has the drawback of requiring an additional component, the support, for each of the wheels of the vehicle.
  • the extended mobility requirements are such that it is in general difficult to provide tires with comfort and driving characteristics that are comparable to standard tires.
  • the sidewall inserts are provided with high modulus materials, which generally have reduced comfort characteristics.
  • the invention provides a tire comprising an inner carcass structure and an outer carcass structure, both 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 b eing extended radially u pward by a sidewall p ortion, a reinforced s ummit, t he s idewall portions j oining s aid s ummit, said bead further comprising an anchoring zone for anchoring said carcass structures in said bead, said tire being adapted for continued mobility in a substantially deflated condition and comprising runflat inserts provided in the radially inner portion of the sidewalls, said tire further comprising an outer sidewall inter carcass structures insert, extending radially outwardly along said outer sidewall between said carcass structures from said anchoring zone to an upper portion of the outer sidewall, and an inner sidewall inter carcass structures insert, extending axially
  • the elastomeric material of said outer sidewall inter carcass structures insert has a Modulus of extension ME10 comprised between 2 to 5 Mpa, and most preferably comprised between 3 to 4 Mpa.
  • the elastomeric material of said inner sidewall inter carcass structures insert has a Modulus of extension ME10 comprised between 4 to 9 Mpa, and most preferably comprised between 5 to 6 Mpa.
  • the outer sidewall inter carcass structures insert further extends from said outer sidewall, along the summit portion of the tire and a radially upper portion of the inner sidewall.
  • the runflat insert may be in direct contact with the cords of said carcass structures.
  • 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 reinforcement armature or reinforcement of the tires is currently - and most frequently - constituted by stacking one or more plies conventionally referred to as "carcass plies", “crown plies”, etc.
  • This manner of designating the reinforcement armatures is derived from the manufacturing process, which consists of producing a series of semi-finished products in the form of plies, provided with cord reinforcing threads which are frequently longitudinal, which products are then assembled or stacked in order to build a tire blank.
  • the plies are produced flat, with large dimensions, and are subsequently cut according to the dimensions of a given p roduct. T he p lies a re a lso a ssembled, i n a first p hase, substantially flat.
  • the blank thus produced is then shaped to adopt the toroidal profile typical of tires.
  • the semi-finished products referred to as "finishing" products are then applied to the blank, so as to obtain a product ready to be vulcanised.
  • Such a type of "conventional" process involves, in particular for the phase of manufacture of the blank of the tire, the use of an anchoring element (generally a bead wire), used for anchoring or holding the carcass reinforcement in the zone of the beads of the tire.
  • an anchoring element generally a bead wire
  • a portion of all the plies constituting the carcass reinforcement is turned up around a bead wire arranged in the tire bead. In this manner, the carcass reinforcement is anchored in the bead.
  • the conventional terms such as "plies”, “bead wires”, etc.
  • the term “carcass structure” is valid as a designation for the reinforcement cords of a carcass ply in the conventional process, and the corresponding cords, generally applied at the level of the beads, sidewalls and summit of a tire produced in accordance with a process without semi-finished products.
  • anchoring zone for its part, may equally well designate the
  • cord very generally designates both monofilaments and multifilaments or assemblies such as cables, plied yarns or alternatively any equivalent type of assembly, whatever the material and the treatment of these cords. This may, for example, involve surface treatments, coating or pre-sizing in order to promote adhesion to the rubber.
  • unitary cord designates a cord formed of a single element, without assembling.
  • multifilament designates an assembly of at least two unitary elements to form a cable, plied yarn etc.
  • “Characteristics of the cord” is understood to mean, for example, its dimensions, its composition, its characteristics and mechanical properties (in particular the modulus), its chemical characteristics and properties, etc.
  • contact between a cord and a layer of bonding rubber is understood to mean the fact that at least part of the outer circumference of the cord is in intimate contact with the rubber composition constituting the bonding rubber.
  • the carcass ply or plies is/are turned up about a bead wire.
  • the bead wire then performs a carcass anchoring function.
  • it withstands the tension which develops in the carcass cords for example under the action of the inflation pressure.
  • “Sidewalls” refers to the portions of the tire, most frequently of low flexural strength, located between the crown and the beads.
  • “Sidewall mix” refers to the rubber mixes located axially to the outside relative to the cords of the reinforcement structure of the carcass and to their bonding rubber. These mixes usually have a low elasticity modulus.
  • “Bead” refers to the portion of the tire adjacent radially internally to the sidewall.
  • Modulus of extension ME10 of a rubber composition is understood to mean an apparent secant modulus of extension obtained at a uniaxial deformation of extension of the order of 10% measured at 23°C in accordance with Standard ASTM D 412.
  • radially upwards or “radially upper” or “radially externally” means towards the largest radii.
  • a reinforcement or reinforcing structure or carcass structure will be said to be radial when its cords are arranged at 90°, but also, according to the terminology in use, at an angle close to 90°.
  • the tire of the invention comprises a bead 1 provided with a seat 12, specially adapted to fit on the tire mounting rim.
  • the bead extends substantially radially to the sidewalls 13 and 15.
  • the summit 14 comprises reinforcement layers of known type.
  • the tire comprises an inner carcass structure 5, 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 5 terminates in an anchoring zone 2 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 3.
  • a preferred embodiment of such a reinforcement comprises a cord arrangement 4 provided with at least one substantially circumferentially oriented cord laterally bordering the carcass structure on at least one side.
  • "anchored" in the bead portion means that the cord 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 cord arrangement rather than being wound around a traditional bead core.
  • the mechanical properties of the anchoring zone 4 may be optimized in using an elastomeric bead filler having preferably a relatively high elasticity modulus.
  • the tire further comprises an outer carcass structure 6, provided outwardly from said inner carcass structure 5.
  • the outer carcass structure is also anchored in the anchoring zone 2, in a manner similar to the inner carcass structure.
  • the inner and outer carcass structures extend along substantially parallel paths in the tire summit 14.
  • An outer sidewall 13 and an inner sidewall 15 are provided.
  • the inner sidewall 15 corresponds to the sidewall on the inner side of the vehicle when said tire is mounted under standard operating conditions.
  • the outer sidewall 13 corresponds to the sidewall on the outer side of the vehicle when said tire is mounted under standard operating conditions.
  • the tire of the invention is adapted for operation in continued mobility in a substantially deflated condition.
  • runflat inserts 9 are provided in the axially inner portion of each sidewalls 13 and 15.
  • the tire further comprises outer and inner sidewalls inter carcass structures inserts 10 and 11.
  • the outer sidewall inter carcass structure insert extends along said outer sidewall between said carcass structures from said anchoring zone to an upper portion of the outer sidewall.
  • the inner sidewall inter carcass structure insert extends along said inner sidewall from said anchoring zone to a substantially median portion of the inner sidewall.
  • the Modulus of extension ME10 of said outer sidewall inter carcass structures insert material is lower than the Modulus of extension ME10 of said inner sidewall inter carcass structures insert material.
  • the elastomeric material of said outer sidewall inter carcass structures insert may have a Modulus of extension ME10 comprised between 2 to 5 Mpa, and most preferably comprised between 3 to 4 Mpa
  • the elastomeric material of said inner sidewall inter carcass structures insert may have a Modulus of extension ME10 comprised between 4 to 9 Mpa, and most preferably comprised between 5 to 6 Mpa.
  • the outer sidewall inter carcass structures insert 10 further extends from said outer sidewall 13, along the summit portion of the tire 14 and a radially upper portion of the inner sidewall 15. At this position, the two inter carcass structures inserts 10 and 11 joint each other and form and insert interface 16.
  • Such an interface 16 may be shaped in different forms, angles, etc. The radial position of this interface 16 may also differ according to different variants.
  • the interface 16 may also comprise a different elastomeric material than those of inserts 10 or 11.
  • the inner and outer sidewalls may also be provided with runflat inserts 9 having different shapes, dimensions, materials, or combinations thereof, providing asymmetrical runflat inserts configurations.
  • 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.

Landscapes

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

Abstract

L’invention concerne un pneumatique conçu pour pouvoir continuer de rouler dans un état sensiblement dégonflé, comprenant deux structures de carcasse (5, 6), des inserts de roulement à plat montés dans la partie axialement intérieure de parois latérales, un insert de paroi latérale extérieure entre structures de carcasse (10, 11) se prolongeant radialement vers l’extérieur le long d’une paroi latérale entre les structures de carcasse à partir d’une zone d’ancrage (2) jusqu’à une partie supérieure de la paroi latérale extérieure, et un insert de paroi latérale intérieure entre structures de carcasse (9) se prolongeant radialement vers l’extérieur le long de la paroi latérale intérieure à partir de la zone d’ancrage jusqu’à une partie sensiblement médiane de la paroi latérale intérieure. Le module d’allongement ME10 du matériau constituant l’insert de paroi latérale extérieure entre structures de carcasse est inférieur au module d’allongement ME10 du matériau constituant l’insert de paroi latérale intérieure entre structures de carcasse.
PCT/US2004/043956 2004-12-29 2004-12-29 Pneumatique a mobilite accrue presentant une configuration asymetrique de materiaux entre les carcasses WO2006071228A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/US2004/043956 WO2006071228A1 (fr) 2004-12-29 2004-12-29 Pneumatique a mobilite accrue presentant une configuration asymetrique de materiaux entre les carcasses

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2004/043956 WO2006071228A1 (fr) 2004-12-29 2004-12-29 Pneumatique a mobilite accrue presentant une configuration asymetrique de materiaux entre les carcasses

Publications (2)

Publication Number Publication Date
WO2006071228A1 true WO2006071228A1 (fr) 2006-07-06
WO2006071228A8 WO2006071228A8 (fr) 2007-07-26

Family

ID=36615236

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2004/043956 WO2006071228A1 (fr) 2004-12-29 2004-12-29 Pneumatique a mobilite accrue presentant une configuration asymetrique de materiaux entre les carcasses

Country Status (1)

Country Link
WO (1) WO2006071228A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7703493B2 (en) 2003-12-30 2010-04-27 Michelin Recherche Et Technique S.A. Tyre having asymmetrical self-supporting sidewalls
US8476808B2 (en) 2008-08-29 2013-07-02 Michelin Recherche Et Technique 1-d tire apparatus
US8742265B2 (en) 2008-08-29 2014-06-03 Compagnie Generale Des Etablissements Michelin 1-D tire patch apparatus and methodology
US20150239189A1 (en) * 2012-08-24 2015-08-27 Sumitomo Rubber Industries Ltd. Manufacturing method for pneumatic tire and pneumatic tire

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002030688A1 (fr) * 2000-10-10 2002-04-18 Societe De Technologie Michelin Pneumatique presentant un passage de carcasse externe
WO2002096672A2 (fr) * 2001-05-29 2002-12-05 Societe De Technologie Michelin Pneu a affaissement limite
US6494242B2 (en) * 1999-05-27 2002-12-17 Michelin Recherche Et Technique Runflat tire having optimized carcass path
US6814119B2 (en) * 2000-03-31 2004-11-09 Pirelli Pneumatici S.P.A. Self-supporting tire for a vehicle wheel and method for manufacturing the tire
JP2004345385A (ja) * 2003-05-20 2004-12-09 Toyo Tire & Rubber Co Ltd ランフラットタイヤ

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6494242B2 (en) * 1999-05-27 2002-12-17 Michelin Recherche Et Technique Runflat tire having optimized carcass path
US6814119B2 (en) * 2000-03-31 2004-11-09 Pirelli Pneumatici S.P.A. Self-supporting tire for a vehicle wheel and method for manufacturing the tire
WO2002030688A1 (fr) * 2000-10-10 2002-04-18 Societe De Technologie Michelin Pneumatique presentant un passage de carcasse externe
WO2002096672A2 (fr) * 2001-05-29 2002-12-05 Societe De Technologie Michelin Pneu a affaissement limite
JP2004345385A (ja) * 2003-05-20 2004-12-09 Toyo Tire & Rubber Co Ltd ランフラットタイヤ

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7703493B2 (en) 2003-12-30 2010-04-27 Michelin Recherche Et Technique S.A. Tyre having asymmetrical self-supporting sidewalls
US8476808B2 (en) 2008-08-29 2013-07-02 Michelin Recherche Et Technique 1-d tire apparatus
US8742265B2 (en) 2008-08-29 2014-06-03 Compagnie Generale Des Etablissements Michelin 1-D tire patch apparatus and methodology
US9333811B2 (en) 2008-08-29 2016-05-10 Compagnie Generale Des Etablissements Michelin 1-D tire patch apparatus and methodology
US20150239189A1 (en) * 2012-08-24 2015-08-27 Sumitomo Rubber Industries Ltd. Manufacturing method for pneumatic tire and pneumatic tire

Also Published As

Publication number Publication date
WO2006071228A8 (fr) 2007-07-26

Similar Documents

Publication Publication Date Title
US7703493B2 (en) Tyre having asymmetrical self-supporting sidewalls
JP4663639B2 (ja) 重車両用のタイヤ
JP5629213B2 (ja) 非ラジアル型カーカス構造体を有する軽量タイヤ
US6659149B2 (en) Multizone bead for a tire having extended mobility
JP5931338B2 (ja) 軽量ラジアルタイヤ
CN102555689A (zh) 充气轮胎
US6962184B2 (en) Extended-mobility tire with specified bead
US8215356B2 (en) Tire with composite ply structure and envelope turnup
JP2006524605A (ja) 複数の不透過性層を備えた延長された移動性のタイヤ
US20080105351A1 (en) Extended-Mobility Tire with Lowered Anchoring Zone
US20090223617A1 (en) Extended-mobility tire having separated carcass portions in summit
WO2006071229A1 (fr) Pneumatique a mobilite accrue comprenant un insert a deux zones
WO2006071228A1 (fr) Pneumatique a mobilite accrue presentant une configuration asymetrique de materiaux entre les carcasses
WO2006071230A1 (fr) Pneumatique a mobilite accrue comprenant un insert a deux zones de dimensions sensiblement differentes
EP1676730B1 (fr) Pneumatique à mobilité étendue avec des nappes de carcasse séparées dans le sommet
US7249622B2 (en) Tire with deep tread grooves
JP2011506194A (ja) 軽量タイヤ
US7240709B2 (en) Extended-mobility tire with decoupled anchoring zone
JP2006502906A (ja) 対称的な荷重分布を有するビードを備えた長期移動性タイヤ
WO2002030687A2 (fr) Pneu a partie de carcasse en forme de cone tronque
WO2002030690A1 (fr) Pneumatique a talon souple
JP5844973B2 (ja) カーカス構造体の半径方向内側に位置するクラウン層を有する軽量タイヤ
EP4108476A1 (fr) Structure de talon pour pneu
US7469733B2 (en) Extended mobility tire with asymmetrically arranged beads

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application
NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 04815945

Country of ref document: EP

Kind code of ref document: A1