CH433033A - Tire for safety rim - Google Patents

Tire for safety rim

Info

Publication number
CH433033A
CH433033A CH47366A CH47366A CH433033A CH 433033 A CH433033 A CH 433033A CH 47366 A CH47366 A CH 47366A CH 47366 A CH47366 A CH 47366A CH 433033 A CH433033 A CH 433033A
Authority
CH
Switzerland
Prior art keywords
tire
rim
grooves
beads
bead
Prior art date
Application number
CH47366A
Other languages
French (fr)
Inventor
Ravetti Fernand
Original Assignee
Pneumatiques Caoutchouc Mfg
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 Pneumatiques Caoutchouc Mfg filed Critical Pneumatiques Caoutchouc Mfg
Publication of CH433033A publication Critical patent/CH433033A/en

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60CVEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C15/00Tyre beads, e.g. ply turn-up or overlap
    • B60C15/02Seating or securing beads on rims
    • B60C15/024Bead contour, e.g. lips, grooves, or ribs
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60BVEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B21/00Rims
    • B60B21/10Rims characterised by the form of tyre-seat or flange, e.g. corrugated
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60CVEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C15/00Tyre beads, e.g. ply turn-up or overlap
    • B60C15/02Seating or securing beads on rims
    • B60C15/0209Supplementary means for securing the bead
    • B60C15/0226Supplementary means for securing the bead the bead being secured by protrusions of the rim extending from the bead seat, e.g. hump or serrations

Landscapes

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

Description

  

  Pneumatique pour jante à rebord de     sécurité       L'invention     concerne    un pneumatique pour jante à  rebord intérieur de     sécurité    par exemple tel qu'indiqué  en A sur     la        fig.    1. Ce     rebord    en saillie retient le talon du  pneumatique et l'empêche de se déplacer latéralement  vers     l'intérieur    quand le pneu est soumis à un effort laté  ral     important    ou lorsque le pneu est dégonflé.

   Ce  rebord présente cependant     l'inconvénient    de gêner la  mise en place du pneu sur la jante du fait que lors du  montage, le     talon    doit franchir ce rebord.  



  Pour faciliter ce     montage        l'invention    prévoit de réa  liser sur au     moins    un talon devant reposer sur l'aile cor  respondante de la jante, des     rainures    assouplissant la  base du talon et lui     permettant    de franchir plus aisément  le rebord intérieur de sécurité.  



  L'invention est     illustrée    sur la     fig.    1 qui montre en  coupe transversale le pneumatique monté sur sa jante et  sur la     fig.    2 qui est une vue partielle en élévation.  



  Le pneumatique 1 comprend comme habituellement       des    bourrelets 2 renforcés par une ou plusieurs tringles  inextensibles 3. Lorsque le pneu est monté sur la jante 4  les bourrelets sont appliqués par     la    pression de     gonfle-          ment    contre les rebords extérieurs 5 et la face inférieure  des talons de ces bourrelets repose sur les ailes 6 ou    repos<B> </B> de la jante.  



  La surface     inférieure    des     talons    présente des rainu  res transversales 7 donnant à cette surface une forme  ondulée comme représenté sur la     fig.    2. En position mon  tée les     talons    du pneu prennent donc appui sur les ailes  6 de la jante par les crêtes de ces ondulations ce qui est  suffisant pour assurer une bonne assise et un bon cen  trage du pneu sur la jante. Toutefois, les rainures 7  assouplissent     suffisamment    la partie inférieure des talons  pour faciliter le franchissement du rebord intérieur de       sécurité    A de     la.    jante par le talon au moment du mon  tage.

   Une fois monté, les nervures situées entre les rai  nures 7     empêchent    le déplacement latéral du bourrelet  en venant buter contre le     rebord    A.    La largeur, le pas et la profondeur de ces ondula  tions sont conditionnés par les     dimensions    du pneumati  que et par la hauteur en     saillie    du rebord de sécurité, et  ils pourront donc varier d'un pneu à     un    autre. Ces rai  nures sont de préférence prévues sur les deux bourrelets  pour ne pas imposer un sens de montage au pneumati  que mais il est évident que l'on peut n'en prévoir que sur  le seul bourrelet ayant à     franchir    le rebord A.

   D'autre  part, bien que     l'orientation    transversale des     rainures    soit  préférable pour faciliter la déformation de la     gomme        des     nervures au moment du     franchissement    du rebord A, ces  rainures pourront être disposées autrement, par exemple  en biais.  



  L'invention intéresse plus spécialement les pneus       sans    chambre à air et dans ce cas les     moyens    habituels  d'étanchéité entre le pneu et les rebords 5 de la jante et  tels que les stries 8 du talon sont     conservées.  



  Tire for a rim with a safety flange The invention relates to a tire for a rim with an internal safety flange, for example as indicated at A in FIG. 1. This protruding flange retains the bead of the tire and prevents it from moving laterally inward when the tire is subjected to a significant lateral force or when the tire is deflated.

   However, this rim has the drawback of hindering the positioning of the tire on the rim due to the fact that during assembly, the bead must cross this rim.



  To facilitate this mounting, the invention provides for making grooves on at least one bead which must rest on the corresponding wing of the rim, making the base of the bead more flexible and allowing it to cross the inner safety rim more easily.



  The invention is illustrated in FIG. 1 which shows in cross section the tire mounted on its rim and in FIG. 2 which is a partial elevation view.



  As usual, the tire 1 comprises beads 2 reinforced by one or more inextensible bead wires 3. When the tire is mounted on the rim 4 the beads are applied by the inflation pressure against the outer edges 5 and the underside of the tire beads. these beads rest on the wings 6 or rest <B> </B> of the rim.



  The lower surface of the heels has transverse grooves 7 giving this surface a wavy shape as shown in FIG. 2. In the mounted position, the beads of the tire therefore rest on the flanges 6 of the rim by the crests of these undulations, which is sufficient to ensure good seating and good centering of the tire on the rim. However, the grooves 7 soften the lower part of the heels sufficiently to facilitate the crossing of the inner safety edge A of the. rim by the bead at the time of assembly.

   Once mounted, the ribs located between the grooves 7 prevent the lateral displacement of the bead by abutting against the flange A. The width, pitch and depth of these corrugations are conditioned by the dimensions of the tire and by the height protruding from the safety edge, and they may therefore vary from one tire to another. These grooves are preferably provided on the two beads so as not to impose a mounting direction on the tire, but it is obvious that they can only be provided on the single bead having to cross the rim A.

   On the other hand, although the transverse orientation of the grooves is preferable to facilitate the deformation of the rubber of the ribs when crossing the rim A, these grooves can be arranged otherwise, for example at an angle.



  The invention relates more particularly to tubeless tires and in this case the usual sealing means between the tire and the flanges 5 of the rim and such that the grooves 8 of the bead are retained.

 

Claims (1)

REVENDICATION Pneumatique pour jante à rebord intérieur de sécu rité, caractérisé en ce qu'au moins l'un de ses talons a sa partie inférieure reposant sur l'aile de la jante assou plie par des rainures. SOUS-REVENDICATIONS 1. Pneumatique selon la revendication, caractérisé en ce que les rainures sont orientées transversalement. 2. Pneumatique selon la revendication, caractérisé en ce que les deux talons du pneumatique comprennent des rainures d'assouplissement. 3. CLAIM Tire for a rim with an internal safety flange, characterized in that at least one of its beads has its lower part resting on the flange of the rim softened by grooves. SUB-CLAIMS 1. A tire according to claim, characterized in that the grooves are oriented transversely. 2. A tire according to claim, characterized in that the two beads of the tire comprise flexibility grooves. 3. Pneumatique selon la revendication, caractérisé en ce qu'il est du type sans chambre à air. A tire according to claim, characterized in that it is of the tubeless type.
CH47366A 1965-01-14 1966-01-14 Tire for safety rim CH433033A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR2001A FR1434207A (en) 1965-01-14 1965-01-14 Tire for safety rim

Publications (1)

Publication Number Publication Date
CH433033A true CH433033A (en) 1967-03-31

Family

ID=9696570

Family Applications (1)

Application Number Title Priority Date Filing Date
CH47366A CH433033A (en) 1965-01-14 1966-01-14 Tire for safety rim

Country Status (6)

Country Link
BE (1) BE675106A (en)
CH (1) CH433033A (en)
ES (1) ES321702A1 (en)
FR (1) FR1434207A (en)
LU (1) LU50260A1 (en)
NL (1) NL6600375A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1209443A (en) * 1966-11-15 1970-10-21 Dunlop Company Ltd Formerly Du Improvements in and relating to vehicle wheel assemblies
GB1410914A (en) * 1971-10-02 1975-10-22 Dunlop Ltd Vehicle wheel rims
LU80688A1 (en) * 1977-12-23 1979-04-13 Dunlop Ltd TIRE IMPROVEMENTS
WO2001025030A1 (en) * 1999-10-06 2001-04-12 The Goodyear & Tire Rubber Company Tire with knurls in bead surface
US6582029B2 (en) 2001-05-25 2003-06-24 Shimano Inc. Bicycle rim

Also Published As

Publication number Publication date
ES321702A1 (en) 1966-10-16
FR1434207A (en) 1966-04-08
LU50260A1 (en) 1966-07-14
NL6600375A (en) 1966-07-15
BE675106A (en) 1966-07-14

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