FR2518463A2 - Aircraft tyre sub-tread reinforcement with extensible borders - to sustain local tensile stress and suppress dynamic delamination stresses at high speeds - Google Patents

Aircraft tyre sub-tread reinforcement with extensible borders - to sustain local tensile stress and suppress dynamic delamination stresses at high speeds Download PDF

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Publication number
FR2518463A2
FR2518463A2 FR8124263A FR8124263A FR2518463A2 FR 2518463 A2 FR2518463 A2 FR 2518463A2 FR 8124263 A FR8124263 A FR 8124263A FR 8124263 A FR8124263 A FR 8124263A FR 2518463 A2 FR2518463 A2 FR 2518463A2
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FR
France
Prior art keywords
borders
reinforcement
tire
cables
subtread
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.)
Granted
Application number
FR8124263A
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French (fr)
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FR2518463B2 (en
Inventor
Jacques Musy
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Compagnie Generale des Etablissements Michelin SCA
Original Assignee
Compagnie Generale des Etablissements Michelin SCA
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 SCA filed Critical Compagnie Generale des Etablissements Michelin SCA
Priority to FR8124263A priority Critical patent/FR2518463A2/en
Priority to DE19823201985 priority patent/DE3201985A1/en
Priority to IT67126/82A priority patent/IT1191166B/en
Priority to US06/346,128 priority patent/US4418735A/en
Priority to OA57609A priority patent/OA07014A/en
Priority to DD82237286A priority patent/DD202120A5/en
Priority to NL8200503A priority patent/NL8200503A/en
Priority to LU83936A priority patent/LU83936A1/en
Priority to NZ199691A priority patent/NZ199691A/en
Priority to NO820411A priority patent/NO153325C/en
Priority to CH84882A priority patent/CH646101A5/en
Priority to MX191346A priority patent/MX160825A/en
Priority to IL64983A priority patent/IL64983A0/en
Priority to ES1982273339U priority patent/ES273339Y/en
Priority to AT52082A priority patent/AT388138B/en
Priority to GB08203973A priority patent/GB2109751B/en
Priority to SE8200812A priority patent/SE452869B/en
Priority to IN172/CAL/82A priority patent/IN161601B/en
Priority to DK062582A priority patent/DK151070C/en
Priority to GR67304A priority patent/GR76024B/el
Priority to CA000396227A priority patent/CA1154658A/en
Priority to BR8200747A priority patent/BR8200747A/en
Priority to JP57021015A priority patent/JPH0653441B2/en
Priority to AU80433/82A priority patent/AU547886B2/en
Priority to IE319/82A priority patent/IE52539B1/en
Priority to EG68/82A priority patent/EG17484A/en
Priority to FI822563A priority patent/FI822563L/en
Priority to ES519312A priority patent/ES519312A0/en
Publication of FR2518463A2 publication Critical patent/FR2518463A2/en
Application granted granted Critical
Publication of FR2518463B2 publication Critical patent/FR2518463B2/fr
Priority to MYPI88001595A priority patent/MY104377A/en
Granted legal-status Critical Current

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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
    • B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
    • B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
    • B60C9/20—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel
    • B60C9/2003—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel characterised by the materials of the belt cords
    • B60C9/2009—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel characterised by the materials of the belt cords comprising plies of different materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D30/00—Producing pneumatic or solid tyres or parts thereof
    • 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
    • B60C3/00—Tyres characterised by the transverse section
    • B60C3/04—Tyres characterised by the transverse section characterised by the relative dimensions of the section, e.g. low profile
    • 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
    • B60C9/0057—Reinforcements comprising preshaped elements, e.g. undulated or zig-zag 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
    • B60C2200/00—Tyres specially adapted for particular applications
    • B60C2200/02—Tyres specially adapted for particular applications for aircrafts

Abstract

An aircraft tyre is built with a composite subtread reinforcement system involving at least three superimposed plies each having a cord bias of 0-30 degrees from the circumferential axis, a central portion made of relatively inextensible cords and borders made of relatively extensible cords. The tyre profile, when mounted on a wheel but not inflated has a carcass crown curvature radius of up to 0.2, pref. 0.08-0.15, and a max. sidewall curvature radius of up to 0.25. Used for mfr. of tyres having a carcass crown curvature of up to 0.12, pref. 0.04-0.10, and a max. sidewall curvature ratio of up to 0.14, to satisfy normal aircraft tyre shape standards, since extension of the sub-tread borders by service pressures modifies the shape of the carcass. Deformation of the extensible subtread reinforcement borders allows the carcass crown and sidewall curvatures to be reduced to the required levels whilst establishing a tensile stress in the subtread borders to suppress stable dynamic stress variations at high speed. Suppresses vibrations which can otherwise develop sufficiently to initiate delamination and loss of tread if the subtread reinforcement border stress patterns are low or even compressive.

Description

La demande de brevet principale 81 02788 concerne un pneumatique gros porteur ayant une armature de carcasse
formée d'au moins une nappe de câbles radiant ancre à
au moins une tringle dans chaque bourrelet et une armature
de sommet tripartite composée d'une partie médiane et de
deux parties.latérales, les bords de la partie mediane
étant en contact chacun avec une partie latérale, chacune
de ces trois parties étant constituée par au moins une
nappe de câbles faisant un angle compris entre 0 et 300
avec la direction circonférentielle, la flèche relative de
convexité de l'armature de carcasse dans le sommet étant
au plus égale à 0,12 et de préférence comprise entre 0,04
et 0,08 et la flèche relative de convexité de l'armature de
carcasse dans le flanc étant au plus égale à 0,14, le pneus
matique monté sur sa jante et gonfle à sa pression de
service, mais non chargé, ayant ainsi un profil méridien
quasi-rectangulaire, ce pneumatique étant caractérisé en
ce que l'armature de carcasse (2) du pneumatique (1) non
gonflé et monté sur sa jante de service (J) a d'une part
une flèche relative de convexité dans le sommet au plus égale
à 0,20 et, de préférence, comprise entre 0,û8 et 0 > 15 ét
une flèche relative de convexité dans les flancs au plus
égale à 0,25, d'autre part une longueur telle qutapres
gonflagesa courbe d'équilibre-au niveau des épaules (8)
est située radialement à l'extérieur de sa courbe dans le
pneumatique non gonflé, et en ce que la partie médiane
(7, 7) de l'armature de sommet t (7) est formée de cibles
dont l'extensibilité est faible et de préférence voisine
de zéro, tandis que les parties latérales (7a, 7b, 7c) sont
formées de câbles dont 11 extensibilité est très grande. The main patent application 81 02788 relates to a heavy-duty tire having a carcass reinforcement
formed of at least one layer of radiant cables anchored to
at least one bead wire in each bead and a frame
tripartite summit composed of a median part and a
two lateral parts, the edges of the median part
being in contact each with a lateral part, each
of these three parts being constituted by at least one
sheet of cables at an angle between 0 and 300
with the circumferential direction, the relative arrow of
convexity of the carcass reinforcement in the vertex being
at most equal to 0.12 and preferably between 0.04
and 0.08 and the convexity relative arrow of the armature of
carcass in the sidewall being not more than 0.14, the tires
mounted on its rim and swells at its pressure
service, but not loaded, thus having a meridian profile
quasi-rectangular, this tire being characterized in
what the carcass reinforcement (2) of the tire (1) no
inflated and mounted on its rim of service (J) on the one hand
a relative arrow of convexity in the vertex at most equal
at 0.20 and preferably between 0, 8 and 0> 15 and
a relative arrow of convexity in the flanks at the most
equal to 0.25, on the other hand a length such as
inflationsa balance curve-at the shoulders (8)
is located radially out of its curve in the
non-inflated tire, and in that the middle portion
(7, 7) of the crown reinforcement t (7) is formed of targets
whose extensibility is weak and preferably close
from zero, while the lateral parts (7a, 7b, 7c) are
formed of cables of which 11 extensibility is very large.

Le gonflage à la pression de service et, bien plus, à la pression d'épreuve d'un tel pneumatique est accompagne d'une expansion considérable de son sommet. Ceci en raison de ltextensitilité des câbles circonférentiels de l'armature de sommet. The inflation at the service pressure and, moreover, the test pressure of such a tire is accompanied by a considerable expansion of its top. This is due to the lthensitivity of the circumferential cables of the crown reinforcement.

Dans certaines conditions de roulage, notamment à vitesse élevée, un tel sommet peut être blessé par des corps étrangers (cailloux, pièces métalliques provenant d'autres véhicules, etc) gisant sur la trajectoire du pneumatique. In certain driving conditions, particularly at high speed, such a top may be injured by foreign bodies (pebbles, metal parts from other vehicles, etc.) lying on the path of the tire.

Une protection de ladite armature s'avère donc nécessaire.A protection of said armature is therefore necessary.

n raison de l'importance de l'expansion du sommet due au gonflage, il est impossible d'utiliser des câbles métalliques ou textiles, dits élastiques, usuels,-l'élasticité de ces cables étant insuffisante pour suivre l'expansion du sommet et, par suite, elle entraverait l'expansion de celui-ci. Because of the importance of the expansion of the top due to inflation, it is impossible to use metal or textile cables, called elastic cables, usual, the elasticity of these cables being insufficient to follow the expansion of the top and as a result, it would hinder the expansion of it.

D'autre part, l'expansion a une telle importance que ces câbles élastiques se comporteraient comme des câbles usuels et apporteraient un renforcement indésirable de l'armature de sommet.On the other hand, the expansion is of such importance that these elastic cables would behave like usual cables and would provide undesirable reinforcement of the crown reinforcement.

La présente addition a pour but de décrire des moyens qui, coopérant avec l'armature de sommet décrite dans la demande principale précitée póúr protéger cette armature, ni ne font obstacle à ladite expansion du sommet, ni ne renforcent celle-ci de façon indésirable. The present addition aims to describe means which, cooperating with the crown reinforcement described in the aforementioned main application to protect this armature, do not obstruct said expansion of the vertex, nor reinforce it undesirably.

C'est ainsi que l'invention consiste, dans un pneumatique de l'espèce décrite dans la demande principale précitée, à 'disposer radialement à l'extérieur de l'armature de sommet au moins une nappe de câbles ondulés dans le plan de la nappe. Thus, the invention consists, in a tire of the kind described in the above-mentioned main application, in arranging radially outside the crown reinforcement at least one sheet of corrugated cables in the plane of the tablecloth.

De préférence
- l'écartement d'un câble au suivant est compris entre 50 ffi et 100 % de l'amplitude crête à crête des ondulations
- la longueur d'onde des ondulations est comprise entre 100 %et 200 ffi de ladite amplitude crête à crête
- les câbles sont parallèles dans la nappe, c'est-àdire les ondulations sont en phase ;. Preferably
the spacing of one cable to the next is between 50 and 100% of the peak-to-peak amplitude of the corrugations
the wavelength of the corrugations is between 100% and 200 μm of said peak-to-peak amplitude
the cables are parallel in the sheet, that is to say the corrugations are in phase;

- les axes moyens des ondulations des câbles d'une nappe ont orientés à 0 ou à900 par rapportàla direction circonférentielle du pneumatique.  the average axes of the corrugations of the cables of a ply have been oriented at 0 or 900 with respect to the circumferential direction of the tire.

Ladite nappe peut aussi être formée d'un tricot de câbles obtenu, par exemple, en croisant simplement les ondulations. Dans ce cas particulier, l'écartement d'un cible par rapport au suivant est au plus- égal à l'amplitude de crête à crête, des ondulations des fils. L'élasticité du tissu augmente lorsqu'on diminue l'écartement des câbles. Said sheet may also be formed of a cable knit obtained, for example, by simply crossing the corrugations. In this particular case, the spacing of a target relative to the next is at most equal to the peak-to-peak amplitude, the undulations of the wires. The elasticity of the fabric increases when the spacing of the cables is decreased.

Un écran protecteur satisfaisant a été réalisé de la façon suivante pour un pneumatique pour avion, de dimensions 46 x 16-20':
Câbles de 1 mm de diamètre formé chacun de 9 fils d'acier de 23/100 mm de diamètre
Ondulations : sinusoidales
Amplitude des ondulations de crête à crête : 5 mm
longueur d'onde des ondulations : 5 mm
Ecartement de câble à câble : 3,5 mm
Câbles parallèles, c'est-à-dire en phase
Axe moyen des ondulations : orienté à 90O par rapport à la direction circonférentielle.A satisfactory protective screen has been produced in the following manner for an aircraft tire, with dimensions of 46 × 16-20 cm:
Cables 1 mm in diameter each formed of 9 steel wires 23/100 mm in diameter
Ripples: sinusoidal
Amplitude of peak-to-peak corrugations: 5 mm
wavelength of the waves: 5 mm
Cable to cable spacing: 3.5 mm
Parallel cables, that is, in phase
Average axis of the corrugations: oriented at 90 ° with respect to the circumferential direction.

L'écran de protection peut aussi être réalisé à l'aide d'au moins une nappe de câbles ondulés dont les axes moyens des ondulations sont orientés obliquement par rapport à la direction circonférentielle du pneumatique. The protective screen may also be produced using at least one sheet of corrugated cables whose average axes of the corrugations are oriented obliquely with respect to the circumferential direction of the tire.

Par ondulation on entend tout tracé sinusoïdal ou en dents de scie, à crêtes écrêtées ou non. Rippling is understood to mean any sinusoidal or sawtooth pattern, with peaks that are clipped or not.

Sur la figure unique du dessin on voit, à titre d'exemple, deux cibles 7 parallèles, voisins et ondulés sinusoTdalement,
L'écartement e des câbles est égal à la distance entre les axes moyens 71-des deux ondulations. Sa longueur d'onde A est le double de la distance comprise entre deux points d'intersection I et I' consécutifs d'une sinusoïde 7 avec l'axe moyen 71. L'amplitude A est la distance d'une crête 701 à la suivante 702 d'une sinusoïde 7.In the single figure of the drawing we see, for example, two parallel targets 7, sinusoidally adjacent and wavy,
The spacing e of the cables is equal to the distance between the mean axes 71-of the two undulations. Its wavelength A is twice the distance between two consecutive intersection points I and I 'of a sinusoid 7 with the mean axis 71. The amplitude A is the distance from a peak 701 to the following 702 of a sinusoid 7.

les câbles ondulés peuvent aussi être remplacés par des ressorts à boudin de section par exemple elliptique (rectangulaire) dont le grand axe (le grand côté) est parallèle au plan de la nappe qu'ils forment. De préférence on utilise à cet effet du fil d'acier. On peut aussi utiliser comme écran
à pew près~Sarallèles une nappe de fibres métalliques./( diamètre : de 0,1 à 1 mm, longueur : 5 à 20 mm) dispersées dans une couche de gomme.the corrugated cables may also be replaced by coil springs section for example elliptical (rectangular) whose major axis (the long side) is parallel to the plane of the sheet they form. Preferably, steel wire is used for this purpose. It can also be used as a screen
close to ~ Sarallel a ply of metal fibers ./ (diameter: 0.1 to 1 mm, length: 5 to 20 mm) dispersed in a layer of gum.

L'utilisation de câbles ondulés pour former des écrans de protection est connue. Cependant les câbles des nappes-écran utilisés dans les pneumatiques usuels ont des amplitudes et des longueurs d'onde relativement faibles. Par suite, ils sont incapables de suivre les déformations importantes des sommets des pneumatiques de l'espèce décrite dans la demande principale, lorsqu'on les gonfle aux pressions de service et d'épreuve
L'originalité des câbles ondulés décrits dans cette demande additionnelle réside dans les grandeurs importantes des amplitudes et des longueurs d'onde des ondulations, ainsi que dans les écartements entre câbles d'une même nappe. The use of corrugated cables to form shields is known. However, the screen-sheet cables used in conventional tires have relatively small amplitudes and wavelengths. As a result, they are unable to follow the significant deformations of tire peaks of the species described in the main application, when inflated to service and test pressures.
The originality of the corrugated cables described in this additional application lies in the large magnitudes of the amplitudes and wavelengths of the corrugations, as well as in the spacings between cables of the same layer.

Claims (2)

REVENDICATIONS 1. Pneumatique ayant une armature de carcasse formée d'au moins une nappe de câbles radiaux ancrée à au moins une tringle dans chaque bourrelet et une armature de sommet tripartite composée d'une partie médiane et de deux parties. latérales, les bords de la partie médiane étant en contact chacun avec une partie latérale, chacune de ces trois parties étant constituée par au moins une nappe de câbles faisant un angle compris entre -0 et 300 avec la direction circonférentielle, la flèche relative de convexité de l'armature de carcasse dans le sommet étant au plus égale à 0,12 et de préférence'comprise entre 0,04 et 0,08 et la flèche relative de convexité de l'armature de carcasse dans le flanc etant au plus égale à 0,14, le pneumatique monté sur sa jante et gonflé à sa pression de service, mais non chargé, ayant ainsi un profil méridien quasi-rectangulaire, pneumatique dont l'armature de carcasse (2) du pneumatique (1) non gonflé et monté sur sa jante de service (J) a d'une part une flèche relative de convexité dans le sommet au plus égale à 0,20 et, de préférence, comprise entre 0,08 et 0,15 et une fleche relative de convexité dans les flancs au plus égale à 0,25, d'autre part une longueur telle qu'après gonflage sa courbe d'équilibre au niveau des épaules (8) est située radialement à l'extérieur de sa courbe- dans le pneumatique non gonflé, et en ce que la partie médiane (7, 7") de l'armature de sommet (7) est formée de câbles dont ltextensibilité est faible et de préférence voisine de zéro, tandis que les parties latérales (7a, 7b, 7c) sont formées de câbles dont l'extensibilité est très grande; caractérisé en ce que radialement à l'extérieur de l'armature de sommet est disposée au moins une nappe de protection en câbles ondulés dans le plan de la nappe, l'écartement d'un cible au suivant étant compris entre 50 /o et 100 Xo de l'amplitude de crête à crête des ondulations dont la longueur d'onde est comprise entre 100 % et 200 % de ladite amplitude. 1. A tire having a carcass reinforcement formed of at least one ply of radial cables anchored to at least one bead wire in each bead and a tripartite crown reinforcement consisting of a middle portion and two portions. lateral, the edges of the middle part being in contact each with a lateral part, each of these three parts being constituted by at least one layer of cables forming an angle of between -0 and 300 with the circumferential direction, the relative convexity arrow the carcass reinforcement in the apex being at most equal to 0.12 and preferably between 0.04 and 0.08 and the relative convexity arrow of the carcass reinforcement in the sidewall being at most equal to 0.14, the tire mounted on its rim and inflated to its operating pressure, but not loaded, thus having a quasi-rectangular meridian pneumatic profile including the carcass reinforcement (2) of the tire (1) not inflated and mounted on its service rim (J) has on the one hand a relative convexity arrow in the vertex at most equal to 0.20 and, preferably, between 0.08 and 0.15 and a relative arrow of convexity in the flanks at most equal to 0.25, on the other hand a e length such that after inflation its equilibrium curve at the shoulders (8) is located radially out of its curve- in the non-inflated tire, and in that the middle part (7, 7 ") of the crown reinforcement (7) is formed of cables whose sensitivity is low and preferably close to zero, while the lateral parts (7a, 7b, 7c) are formed of cables whose extensibility is very large; characterized in that radially outside the crown reinforcement is disposed at least one corrugated cable protection layer in the plane of the web, the spacing from one target to the next being between 50 / o and 100 Xo of the peak-to-peak amplitude of the corrugations whose wavelength is between 100% and 200% of said amplitude. 2. Pneumatique selon la revendication 1, caractérisé en ce que les axes moyens des ondulations des cibles ont une 2. A tire according to claim 1, characterized in that the mean axes of the corrugations of the targets have a orientation comprise entre OO et 900.  orientation between OO and 900.
FR8124263A 1981-02-12 1981-12-23 Aircraft tyre sub-tread reinforcement with extensible borders - to sustain local tensile stress and suppress dynamic delamination stresses at high speeds Granted FR2518463A2 (en)

Priority Applications (29)

Application Number Priority Date Filing Date Title
FR8124263A FR2518463A2 (en) 1981-12-23 1981-12-23 Aircraft tyre sub-tread reinforcement with extensible borders - to sustain local tensile stress and suppress dynamic delamination stresses at high speeds
DE19823201985 DE3201985A1 (en) 1981-02-12 1982-01-22 "TIRES, IN PARTICULAR FOR AIRCRAFT, AND METHOD FOR THE PRODUCTION THEREOF"
IT67126/82A IT1191166B (en) 1981-02-12 1982-02-03 TIRE IN PARTICULAR FOR AIRCRAFTS WITH SUMMATORY ARMOR WITH EXTENDABLE EDGES AND PROCEDURE FOR ITS MANUFACTURE
US06/346,128 US4418735A (en) 1981-02-12 1982-02-05 Tire, particularly for airplanes, having a crown reinforcement with extensible edges and method of manufacturing same
OA57609A OA07014A (en) 1981-02-12 1982-02-05 Pneumatic tires, in particular for airplanes, with crown reinforcement with extensible edges, and method of manufacture thereof.
DD82237286A DD202120A5 (en) 1981-02-12 1982-02-09 AIR TIRES, ESPECIALLY FOR PLANES, AND METHOD FOR THE PRODUCTION THEREOF
LU83936A LU83936A1 (en) 1981-02-12 1982-02-10 TIRE, PARTICULARLY FOR AIRCRAFT, WITH A TOP-SIZE MANUFACTURE WITH AXTENSIBLE EDGES, AND ITS MANUFACTURING METHOD
NZ199691A NZ199691A (en) 1981-02-12 1982-02-10 Pneumatic tyre:extensible crown reinforcement flanks inextensible zone
NL8200503A NL8200503A (en) 1981-02-12 1982-02-10 AIR TIRE, IN PARTICULAR FOR AIRCRAFT, WITH A CRANE REINFORCEMENT OF STRETCHY CABLES, AND METHOD FOR THE MANUFACTURE THEREOF.
GB08203973A GB2109751B (en) 1981-02-12 1982-02-11 A pneumatic tyre
MX191346A MX160825A (en) 1981-02-12 1982-02-11 IMPROVED AIRCRAFT TIRE
IL64983A IL64983A0 (en) 1981-02-12 1982-02-11 Tyre,particularly for airplanes,having a crown reinforcement with extensible edges and method of manufacturing same
ES1982273339U ES273339Y (en) 1981-02-12 1982-02-11 TIRE, ESPECIALLY FOR AIRCRAFT
AT52082A AT388138B (en) 1981-02-12 1982-02-11 TIRES, IN PARTICULAR FOR AIRCRAFT
NO820411A NO153325C (en) 1981-02-12 1982-02-11 TIRES, SPECIAL FOR AIRCRAFT.
SE8200812A SE452869B (en) 1981-02-12 1982-02-11 VEHICLE DECK, SPECIAL FOR AIRPLANE, WITH A TOP PARAMET WITH TOUGHABLE EDGE AND WAY TO MAKE A SUCH DECK
CH84882A CH646101A5 (en) 1981-02-12 1982-02-11 TIRE, ESPECIALLY FOR AIRCRAFT, WITH A SUMMIT FRAME WITH EXTENSIBLE EDGES AND MANUFACTURING METHOD THEREOF.
IE319/82A IE52539B1 (en) 1981-02-12 1982-02-12 A pneumatic tyre,particularly for aircraft,having a crown reinforcement with extensible edges,and preparation thereof
GR67304A GR76024B (en) 1981-02-12 1982-02-12
CA000396227A CA1154658A (en) 1981-02-12 1982-02-12 Tire, particularly for airplanes, having a crown reinforcement with extensible edges and method of manufacturing same
BR8200747A BR8200747A (en) 1981-02-12 1982-02-12 PNEUMATIC, NOTES FOR AIRCRAFT AND ITS MANUFACTURING PROCESS
JP57021015A JPH0653441B2 (en) 1981-02-12 1982-02-12 tire
AU80433/82A AU547886B2 (en) 1981-02-12 1982-02-12 Crown reinforced tyre
DK062582A DK151070C (en) 1981-02-12 1982-02-12 PNEUMATIC COVER, NAME FLIGHT COVER
IN172/CAL/82A IN161601B (en) 1981-02-12 1982-02-12
EG68/82A EG17484A (en) 1981-02-12 1982-02-13 Pneumatique notamment pour avion,aves une armature de sommet a bords extensibles et son procede de fabrication
FI822563A FI822563L (en) 1981-12-23 1982-07-20 YTTERDAECK FOER STORA BELASTNINGAR, I SYNNERHET FOER FLYGPLAN
ES519312A ES519312A0 (en) 1981-02-12 1983-01-27 AIRCRAFT TIRE MANUFACTURING PROCEDURE.
MYPI88001595A MY104377A (en) 1981-02-12 1988-12-30 A pneumatic tyre, parrticularly for aircraft, having a crown reinforcement with extensible edges, and preparation thereof.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8124263A FR2518463A2 (en) 1981-12-23 1981-12-23 Aircraft tyre sub-tread reinforcement with extensible borders - to sustain local tensile stress and suppress dynamic delamination stresses at high speeds

Publications (2)

Publication Number Publication Date
FR2518463A2 true FR2518463A2 (en) 1983-06-24
FR2518463B2 FR2518463B2 (en) 1984-01-27

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Family Applications (1)

Application Number Title Priority Date Filing Date
FR8124263A Granted FR2518463A2 (en) 1981-02-12 1981-12-23 Aircraft tyre sub-tread reinforcement with extensible borders - to sustain local tensile stress and suppress dynamic delamination stresses at high speeds

Country Status (2)

Country Link
FI (1) FI822563L (en)
FR (1) FR2518463A2 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1153397A (en) * 1956-06-15 1958-03-05 Dunlop Sa Improvement in pneumatic tires
FR71133E (en) * 1957-03-22 1959-10-13 Dunlop Sa Improvement in pneumatic tires
DE2319169A1 (en) * 1972-01-20 1974-10-31 Firestone Tire & Rubber Co BELT TIRES AND THE METHOD OF MANUFACTURING IT

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1153397A (en) * 1956-06-15 1958-03-05 Dunlop Sa Improvement in pneumatic tires
FR71133E (en) * 1957-03-22 1959-10-13 Dunlop Sa Improvement in pneumatic tires
DE2319169A1 (en) * 1972-01-20 1974-10-31 Firestone Tire & Rubber Co BELT TIRES AND THE METHOD OF MANUFACTURING IT

Also Published As

Publication number Publication date
FI822563L (en) 1983-06-24
FR2518463B2 (en) 1984-01-27
FI822563A0 (en) 1982-07-20

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