FR2460218A2 - Ply format for sub-tread reinforcement of a self:supporting tyre - modified to improve delamination resistance of sub-tread ply borders - Google Patents
Ply format for sub-tread reinforcement of a self:supporting tyre - modified to improve delamination resistance of sub-tread ply borders Download PDFInfo
- Publication number
- FR2460218A2 FR2460218A2 FR7917108A FR7917108A FR2460218A2 FR 2460218 A2 FR2460218 A2 FR 2460218A2 FR 7917108 A FR7917108 A FR 7917108A FR 7917108 A FR7917108 A FR 7917108A FR 2460218 A2 FR2460218 A2 FR 2460218A2
- Authority
- FR
- France
- Prior art keywords
- ply
- belt
- sub
- tread
- plies
- 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.)
- Pending
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
- B60C17/0009—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
- B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
- B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
-
- 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
- B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
- B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
- B60C9/1821—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers comprising discrete fibres or filaments
-
- 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
- B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
- B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
- B60C9/26—Folded plies
-
- 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
- B60C2017/0081—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor comprising special reinforcing means in the crown area
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
Abstract
Description
Le brevet principal nO 78 13956 déposé le 11 Mai 1978 dcrt un pneumatique de sécurité susceptible de rouler sans s'affaisser complètement sous la charge même lorsqu'il n'est pas gonflé, grâce à des flancs auto-portants associés à une bande de roulement renforcée par une armature à grande résistance à la flexion transversale. Cette armature présente la forme d'une ceinture constituée de nappes de renfort superposes dont au moins deux sont espacées radialement par une couche intermédiaire de gomme d'épaisseur notable, de l'ordre de 2 millimètres environ. The main patent no. 78 13956 filed on May 11, 1978 describes a safety tire capable of rolling without completely collapsing under load even when it is not inflated, thanks to self-supporting sidewalls associated with a tread. reinforced by a reinforcement with high resistance to transverse bending. This frame has the shape of a belt made up of superposed reinforcing plies at least two of which are spaced radially by an intermediate layer of rubber of appreciable thickness, of the order of approximately 2 millimeters.
Au cours du développement et de la mise au point de ce type de pneumatique il est apparu que l'endurance peut être notablement améliorée lorsque l'armature de renforcement de la bande de roulement est établie dans les conditions particulières décrites ci-après en référence aux fig. 1 et 2, cijointes. During the development and fine-tuning of this type of tire, it appeared that the endurance can be notably improved when the reinforcement reinforcement of the tread is established under the specific conditions described below with reference to fig. 1 and 2, attached.
Ces figures représentent des sections méridiennes de pneus comprenant, comme dans le brevet principal, un sommet 10 avec une bande de roulement 11 renforcée par une ceinture inextensible 23 ayant à peu près la même largeur que la surface de roulement, des bourreletsl2 et des flancs auto-portant 14 comprenant chacun un profilé de soutien à section lenticulaire 20. La carcasse 21, de préférence radiale, passe sous la ceinture 23 et dans les flancs 14, du côté axialement extérieur des profilés 20, pour s'accrocher autour des tringles 22 des bourrelets. These figures represent tire meridian sections comprising, as in the main patent, a crown 10 with a tread 11 reinforced by an inextensible belt 23 having approximately the same width as the running surface, beads 12 and sidewalls bearing 14 each comprising a support profile with lenticular section 20. The carcass 21, preferably radial, passes under the belt 23 and in the sides 14, on the axially outer side of the profiles 20, to hang around the rods 22 of the beads.
La ceinture de sommet 23 comprend elle-même une première nappe 23.1, une couche de gomme épaisse 30 et deux autres nappes 23.2 étroitement superposée et constituée de cablés souples orientés symztriquement suivant des angles faibles de 10 à 250 environ par rapport au plan équatorial du pneu. The crown belt 23 itself comprises a first ply 23.1, a layer of thick rubber 30 and two other plies 23.2 tightly superimposed and made up of flexible cables oriented symmetrically at small angles from 10 to 250 approximately with respect to the equatorial plane of the tire .
Tandis que les nappes 23.2 et la couche de gomme 30 présentent une largeur approximativement égale à celle de la surface de roulement du pneu en condition normale d'utilisation, la première nappe de ceinture 23.1 présente une largeur maindre afin que ses bords se situent en retrait des bords des autres nappes de la ceinture. Cette largeur de la nappe 23.1 reste cependant supérieure à l'écartement des parties supérieures -des profilés de soutien 20 afin de conserver à l'ensemble de la ceinture une rigidité de flexion élevée dans le sens transversal pour résister au creusement du sommet 10 dans la zone de contact au sol lorsque le pneu est utilisé sans pression d'air.Avec cette première nappe 23.1 moins large et en retrait des bords des autres nappes, l'endurance du pneu est améliorée en ce sens que lapparition de déchéances dans le sommet du pneu est notablement retardée.While the plies 23.2 and the layer of rubber 30 have a width approximately equal to that of the tread surface of the tire under normal conditions of use, the first ply of belt 23.1 has a width so that its edges are set back from the edges of the other plies of the belt. This width of the ply 23.1 remains, however, greater than the spacing of the upper parts - of the support profiles 20 in order to keep the whole of the belt a high bending stiffness in the transverse direction to resist the digging of the crown 10 in the contact area with the ground when the tire is used without air pressure. With this first ply 23.1 narrower and set back from the edges of the other plies, the endurance of the tire is improved in the sense that the appearance of lapses in the top of the tire is significantly delayed.
La première nappe de ceinture 23.1 est généralement faite de cablés souples orientés transversalement afin de donner à la ceinture un minimum de rigidité en flexion dans le sens circonférenciel. La nappe 23.1 peut aussi être réalisée en un mélange caoutchouteux renforcé par des fibres courtes de préférence métalliques dispersées dans ce mélange pour former une feuille résistante à la traction et à la compression. The first belt ply 23.1 is generally made of flexible cables oriented transversely in order to give the belt a minimum of bending stiffness in the circumferential direction. The web 23.1 can also be made of a rubbery mixture reinforced by short fibers, preferably metallic, dispersed in this mixture to form a sheet which is resistant to traction and compression.
Dans la réalisation illustrée sur la figure 3 la première nappe de ceinture 31 est au contraire nettement plus large que les autres nappes de la ceinture et les bords latéraux 31.1 de cette nappe sont repliés par dessus les bords des nappes 23.2. Les extrémités des bords repliés 31.1 sont ainsi éloignés des zones critiques situées en bordure de la ceinture, ce qui augmente l'endurence du pneu. Les bords repliés peuvent s'étendre plus ou moins vers le milieu de la ceinture selon le degré de résistance à la flexion recherchée. In the embodiment illustrated in FIG. 3, the first belt ply 31 is on the contrary clearly wider than the other plies of the belt and the lateral edges 31.1 of this ply are folded over the edges of the plies 23.2. The ends of the folded edges 31.1 are thus distant from the critical zones situated at the edge of the belt, which increases the endurance of the tire. The folded edges may extend more or less towards the middle of the belt depending on the degree of resistance to flexion sought.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7917108A FR2460218A2 (en) | 1979-06-28 | 1979-06-28 | Ply format for sub-tread reinforcement of a self:supporting tyre - modified to improve delamination resistance of sub-tread ply borders |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7917108A FR2460218A2 (en) | 1979-06-28 | 1979-06-28 | Ply format for sub-tread reinforcement of a self:supporting tyre - modified to improve delamination resistance of sub-tread ply borders |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2460218A2 true FR2460218A2 (en) | 1981-01-23 |
Family
ID=9227380
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7917108A Pending FR2460218A2 (en) | 1979-06-28 | 1979-06-28 | Ply format for sub-tread reinforcement of a self:supporting tyre - modified to improve delamination resistance of sub-tread ply borders |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2460218A2 (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1998054014A1 (en) * | 1997-05-29 | 1998-12-03 | The Goodyear Tire & Rubber Company | Runflat tire with improved uninflated handling |
EP0911188A1 (en) * | 1997-10-20 | 1999-04-28 | Sumitomo Rubber Industries Limited | Run-flat tyre |
WO1999048710A1 (en) * | 1998-03-26 | 1999-09-30 | The Goodyear Tire & Rubber Company | Fabric underlay and tread insert for improved tread rigidity of runflat tire |
WO2000002740A1 (en) * | 1998-07-10 | 2000-01-20 | The Goodyear Tire & Rubber Company | Thread reinforcement means for extended mobility tire |
EP1167081A1 (en) * | 2000-06-28 | 2002-01-02 | Sumitomo Rubber Industries, Ltd. | Run-flat tire |
US6338374B1 (en) | 1998-03-26 | 2002-01-15 | The Goodyear Tire & Rubber Company | Runflat tire with fabric underlay and tread insert |
US6439283B1 (en) | 1997-05-29 | 2002-08-27 | The Goodyear Tire & Rubber Company | Runflat tire with tread stiffening member |
US6561245B1 (en) | 1998-07-10 | 2003-05-13 | The Goodyear Tire & Rubber Company | Thread reinforcement means for extended mobility tire |
-
1979
- 1979-06-28 FR FR7917108A patent/FR2460218A2/en active Pending
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1998054014A1 (en) * | 1997-05-29 | 1998-12-03 | The Goodyear Tire & Rubber Company | Runflat tire with improved uninflated handling |
US6439283B1 (en) | 1997-05-29 | 2002-08-27 | The Goodyear Tire & Rubber Company | Runflat tire with tread stiffening member |
EP0911188A1 (en) * | 1997-10-20 | 1999-04-28 | Sumitomo Rubber Industries Limited | Run-flat tyre |
US6142204A (en) * | 1997-10-20 | 2000-11-07 | Sumitomo Rubber Industries, Ltd. | Run-flat tire with tread reinforcing layer |
WO1999048710A1 (en) * | 1998-03-26 | 1999-09-30 | The Goodyear Tire & Rubber Company | Fabric underlay and tread insert for improved tread rigidity of runflat tire |
US6338374B1 (en) | 1998-03-26 | 2002-01-15 | The Goodyear Tire & Rubber Company | Runflat tire with fabric underlay and tread insert |
WO2000002740A1 (en) * | 1998-07-10 | 2000-01-20 | The Goodyear Tire & Rubber Company | Thread reinforcement means for extended mobility tire |
US6561245B1 (en) | 1998-07-10 | 2003-05-13 | The Goodyear Tire & Rubber Company | Thread reinforcement means for extended mobility tire |
EP1167081A1 (en) * | 2000-06-28 | 2002-01-02 | Sumitomo Rubber Industries, Ltd. | Run-flat tire |
US6701986B2 (en) | 2000-06-28 | 2004-03-09 | Sumitomo Rubber Industries, Ltd. | Run-flat tire with tread reinforcing rubber layer |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0005399B1 (en) | Pneumatic safety tyre | |
CH591965A5 (en) | ||
FR2499912A1 (en) | TIRE FOR VEHICLE | |
US4183391A (en) | Vehicle tire | |
FR2460218A2 (en) | Ply format for sub-tread reinforcement of a self:supporting tyre - modified to improve delamination resistance of sub-tread ply borders | |
CA2320876C (en) | Tyre top reinforcement ply | |
CH646101A5 (en) | TIRE, ESPECIALLY FOR AIRCRAFT, WITH A SUMMIT FRAME WITH EXTENSIBLE EDGES AND MANUFACTURING METHOD THEREOF. | |
EP0082827B1 (en) | An improved tubular tire for cycles | |
FR2622844A1 (en) | RADIAL PNEUMATIC BANDAGE ENVELOPES WITH LOW PROFILE | |
EP1397263B1 (en) | Tyre with reinforced bead | |
KR970011922B1 (en) | Belted tire for vehicles | |
FR2499473A1 (en) | Aircraft tyre sub-tread reinforcement with extensible borders - to sustain local tensile stress and suppress dynamic delamination stresses at high speeds | |
US4553579A (en) | Pneumatic tires having a high resistance to cut growth | |
FR3089870A1 (en) | Vehicle tire comprising a stiffening structure. | |
EP0987129A3 (en) | Pneumatic radial tires | |
US5605589A (en) | Pneumatic tire with specified spacing between cords of inner and outer belts | |
US3999586A (en) | Reinforcing belt for a pneumatic tire | |
WO2009001931A1 (en) | Pneumatic tire | |
FR2778369A1 (en) | TWO RIGIDITY CARCASS FRAME TIRE | |
EP0016686B1 (en) | Vehicle tyre | |
FR2976217B1 (en) | PNEUMATIC BANDAGE | |
JPS6038211A (en) | Radial tire | |
FR2513187A1 (en) | PNEUMATIC BANDAGE FOR VEHICLES | |
US4237953A (en) | Radial tire with tread reinforcement comprising nonfolded plies with radially increasing axial widths | |
FR2672847A1 (en) | Aircraft tyre with reduced internal stress and good load distribution - with curved profile carcass having relationship between radii of central, lateral and side parts at normal pressure and 5000 pascal |