EP0548475B1 - Multilayered athletic shoe sole - Google Patents

Multilayered athletic shoe sole Download PDF

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Publication number
EP0548475B1
EP0548475B1 EP92116508A EP92116508A EP0548475B1 EP 0548475 B1 EP0548475 B1 EP 0548475B1 EP 92116508 A EP92116508 A EP 92116508A EP 92116508 A EP92116508 A EP 92116508A EP 0548475 B1 EP0548475 B1 EP 0548475B1
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Prior art keywords
layer
sole according
sole
stiffener
zone
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EP92116508A
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German (de)
French (fr)
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EP0548475A1 (en
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Francois Girard
Jacques Quellais
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Salomon SAS
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Salomon SAS
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    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B13/00—Soles; Sole-and-heel integral units
    • A43B13/02—Soles; Sole-and-heel integral units characterised by the material
    • A43B13/12—Soles with several layers of different materials

Definitions

  • the present invention relates to the soles of sports shoes produced according to a laminated profile in several layers filling respectively distinct functions, which sole is surmounted by a rod and comprises or not on its rear part, a projecting external heel, as described in the preamble of claim 1 and known from EP-A-458,174.
  • the flexibility in the longitudinal direction of the sole of the shoe is essential, not only to allow an unwinding harmonious foot, when practicing cross-country skiing or hiking Nordic proper but also when taking off the skis for be able to walk freely.
  • soles having the qualities are sought mentioned above but which are also capable of ensuring a certain comfort and cushioning the impact points in contact with the sole on the ground while restoring energy.
  • French Patent No. 2,520,886 relates to an athletic shoe comprising a laminated sole composed of a first layer or sole of contact whose upper part receives a second layer or flexible interlayer in a central plane of which a reinforcement element is inserted at the level of the heel and extending towards the arch.
  • HANWAG a mountain shoe, which offers a sole made up, in a direction of bottom above, an external contact layer on which is superimposed successively a shock absorbing layer then a very first assembly rigid with anti-twist insert.
  • a shoe also known under the trademark "ASOLO” essentially differs in that the cushioning layer is limited to the area of the heel and fits in a corresponding recess in the layer of external contact.
  • such a sole has a stiffening element or shank in rigid, elastically deformable plastic material having a zone of flexion, at least in the metatarsophalangeal zone, in the form of blades spaced transverse, and separated by bridges of lesser thickness and on which is added, by overmolding, a flexible plastic material, elastically deformable.
  • Bridges have openings through which can pass the flexible overmolding material, and are shaped so as to rupture in making the blades rigid, independent of each other during the first use of the sole, their connection then being simply ensured by the material flexible plastic.
  • the present invention relates to a shoe sole of sport made according to a laminated profile in several layers filling respectively separate functions, which sole is surmounted by a rod and includes or not at its rear part, an external heel.
  • the efficiency of the outer or contact layer is improved due to the contact and direct cooperation of the nerve layer with this outer layer the nerve layer then constituting for the contact layer a kind of carcass preventing overall deformation of the contact layer in the way of a radial carcass of a car tire, and allowing the use of rubbers more tender therefore more adherent.
  • the sports shoe 1 shown as a first example of embodiment in Figures 1 and 2 has an outer sole 2, designated in its assembly, on which is mounted a rod 3 having in a manner known per se an opening to allow the passage of the foot 4, this opening being provided a closure system 5 such as a lacing system.
  • the rear part of the sole 2 has a heel 6.
  • the sole 2 is produced according to a laminated profile, as shown in the figure 2, composed of several layers respectively fulfilling functions separate.
  • the comfort layer 8 is made either of a flexible material of density uniform or progressive density increasing from its upper part towards its lower part, in contact with the rigid intermediate nerve 9.
  • the comfort layer 8 is made up of several separate adjacent areas, one first zone 8a of high elasticity corresponding to the heel, a second zone 8b of average elasticity corresponding to the arch favoring circulation of the blood, a third zone 8c of low elasticity favoring the control of the market.
  • the rigidity of the intermediate layer or nerve 9 is of constant value at all points, this value being suitably selected during manufacture according to the destination of the shoe ( Figure 5).
  • This layer 9 can also be constituted by a nerve 9A composed of a plurality of zones 9a, 9b, 9c extending on either side of a twist axis x-x ' and whose stiffness values are different and suitably selected in manufacturing course depending on the destination of the shoe.
  • the nerve 9A can consist of a rigid rear region 9a, a semi-rigid intermediate zone 9b capable of promoting flexion in the zone of metatarsals of foot 4 and a rigid front region 9c in the phalanx area, for shoes particularly intended for walking in high mountains (figure 6).
  • the nerve 9A can consist of a rigid rear region 9a, a flexible intermediate zone 9b, more generally promoting flexion in the zone of metatarsals of the foot 4 and the unfolding of the foot and a front zone 9 c rigid, in the phalanx area, for shoes particularly intended for walking in the middle mountains (Figure 6).
  • the nerve layer 9 in a material composite with different stiffness / bending characteristics depending on the different axes and in particular presenting at the same time a great rigidity to the twist (in a direction perpendicular to the x-x 'axis) and some flexibility in bending along the axis x-x '.
  • the intermediate layer rigid or nerve 9B consists, at least in the metatarsal area, of a succession of rigid inserts 10 arranged alternately perpendicular to the axis of twist x-x 'of said sole, so as to obtain good flexibility in bending while retaining good torsional stiffness, these inserts 10 can be obtained in the same molding operation as the rest of the nerve layer 9B.
  • the inserts 10 constituting the nerve 9B are produced during of the same operation of molding this layer 9B with the contact layer 7.
  • the intermediate layer or nerve 9C has near its front part and its rear part, two recesses in an arc 11a, 11b, substantially corresponding to the ends of the sole and capable of allowing the passage of two stops 12, 13 from the contact layer 7 and on the internal faces which are stuck parts of rod 3.
  • the latter solution also has the advantage that a shoulder 14, 15 perpendicular to the external faces of the stops 12, 13 remain between them and the superior plane of the nerve 9C, so as to obtain an attachment surface intended for the installation of glacier crampons in a high mountain shoe.
  • the stops 12, 13 are also from contact layer 7, but they are the ones that have recesses respectively 12a, 13a for the passage of the nerve layer 9c which does not then presents no recess.
  • FIG. 12 shows a sole 2A in which the comfort layer 8A comprises at its rear part a heel compensated 6A obtained in a single piece with said layer 8A and replacing the outer heel 6 of the shoe 1. Therefore, the contact layer 7 has a substantially uniform thickness over its entire length.
  • the layer comfort consists of reliefs 8B obtained from material on the upper part 7a of the contact layer 7, of shape corresponding to recesses 16 of the intermediate layer or nerve 9D, which they pass through to emerge in a value equal to the thickness of the comfort layer to be obtained.
  • the 9D layer can be also simply overmolded on the contact layer 7 having these reliefs 8B.
  • the reliefs 8B consist of spikes uniformly distributed in the metatarsal and heel area. Of course, they could cover the entire surface of the foot.
  • This solution has the advantage of being able to obtain a three-layer sole according to the invention, from only two materials, the flexibility of the layer 8B comfort to be obtained depending on the density and / or the geometry of the pins component.
  • FIG. 13 shows a particular embodiment of a layer of contact 7A consisting of a plurality of zones, including a first zone peripheral 17 which corresponds to a main area of mechanical grip on the ground, a second central zone before 18 corresponding to a secondary zone holding or grip and a third central rear area 19 neutral.
  • the contact layer 7B is produced by pads attached externally to the nerve 9 in recesses 20 provided for this purpose in the latter and which are of a height less than that of the skates proper.
  • these pads 7B are distributed on either side of the axis of longitudinal torsion, in this case on either side of a central groove of a cross-country ski boot.
  • the rigid intermediate layer 9E is used for mechanical attachment of a fixing loop 21 intended to cooperate with a hinge-type fixing, with or without a reinforcement insert internal metal, said insert and / or loop 21 being overmolded in said rigid intermediate layer 9E, as described in patent application No. 91 04126 filed by the plaintiff.
  • the rigid layer can be used for any other example of mechanical attachment of an interface.
  • the rigid intermediate layer or nerve 9 can be used to a mechanical attachment of a metal insert which cooperates with the fixing of a pedal in a bicycle application, the insert being overmolded in said layer rigid intermediate 9 (example not shown in the drawings).
  • the rigid intermediate layer or nerve 9F allows mechanical attachment of studs (not shown), by screwing. To do this, threaded housings 22 are performed at the lower part of the nerve 9F.
  • the layer of contact 7, 7A, 7B with the ground is rubber having qualities of adhesion and abrasion resistance.
  • contact layer 7, 7A, 7B with the ground can be also a polyurethane or any other thermoplastic material.
  • this can be composed of a loaded or unloaded polyurethane (fiber of glass, carbon, etc.), with a loaded or unfilled polyamide, with a loaded polyethylene or not or any other thermoplastic.
  • each of the layers 7, 8, 9 of the sole 2 can extend or not extend over the entire surface of said sole (cf. for example the mode of realization of Figures 14 and 15).
  • connection of layers 7, 8, 9 to each other constituting the sole 2 is carried out by any means such as bonding, overmolding, ultrasound.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
  • Professional, Industrial, Or Sporting Protective Garments (AREA)

Abstract

The sole (2) has an outer layer (7) which is made of supple material which adheres to the ground and resists abrasion. Its upper layer (8), directly under the foot (4), is assembled directly to the edge of the upper (3a) or to an inner sole. It is made of elastic material which absorbs shocks. An intermediate layer (9), fixed to the lower surface of the upper layer (9b) and the upper surface of the lower layer (9a), is made of material that is rigid in torsion and flexion. It distributes forces from the outer layer and transfers them through the upper layer.

Description

La présente invention est relative aux semelles de chaussures de sport réalisées suivant un profil stratifié en plusieurs couches remplissant respectivement des fonctions distinctes, laquelle semelle est surmontée d'une tige et comporte ou non à sa partie arrière un talon externe en saillie, comme décrit dans la préambule de la revendication 1 et connu de EP-A-458 174.The present invention relates to the soles of sports shoes produced according to a laminated profile in several layers filling respectively distinct functions, which sole is surmounted by a rod and comprises or not on its rear part, a projecting external heel, as described in the preamble of claim 1 and known from EP-A-458,174.

Dans les chaussures plus particulièrement destinées aux sports de montagne, comme par exemple le ski de fond, la randonnée nordique et la randonnée de montagne en général, il a toujours été recherché des semelles permettant à la fois d'obtenir des qualités de rigidité en torsion par rapport à son axe longitudinal, alliées à de bonnes qualités en flexion, notamment dans la zone des métatarses.In shoes more specifically intended for mountain sports, such as cross-country skiing, Nordic hiking and hiking mountain in general, it has always been sought after soles allowing both obtain torsional stiffness qualities relative to its longitudinal axis, combined with good flexural qualities, especially in the metatarsal area.

Cela est plus particulièrement recherché dans la pratique du ski de fond et de randonnée nordique où la chaussure coopère avec le ski et doit garantir un guidage optimal de celui-ci.This is more particularly sought in the practice of cross-country skiing and Nordic hiking where the shoe cooperates with the ski and must guarantee a optimal guidance of it.

Par ailleurs, la flexibilité en direction longitudinale de la semelle de la chaussure est indispensable, non seulement pour permettre un déroulement harmonieux du pied, lors de la pratique du ski de fond ou de la randonnée nordique proprement dite mais également lors du déchaussage des skis pour pouvoir marcher librement.Furthermore, the flexibility in the longitudinal direction of the sole of the shoe is essential, not only to allow an unwinding harmonious foot, when practicing cross-country skiing or hiking Nordic proper but also when taking off the skis for be able to walk freely.

Il en est de même pour les chaussures de randonnée pédestre spécifiques.The same is true for specific hiking shoes.

De plus, et précisément dans le cas de chaussures de marche ou de chaussures de ski destinées à pouvoir être utilisées pour marcher, occasionnellement ou non, il est recherché des semelles ayant les qualités précitées mais qui soient également aptes à assurer un certain confort et à amortir les points d'impact au contact de la semelle sur le sol tout en restituant l'énergie.In addition, and specifically in the case of walking shoes or ski boots intended to be able to be used for walking, occasionally or not, soles having the qualities are sought mentioned above but which are also capable of ensuring a certain comfort and cushioning the impact points in contact with the sole on the ground while restoring energy.

Le brevet français n° 2 520 886 est relatif à une chaussure d'athlétisme comportant une semelle stratifiée composée d'une première couche ou semelle de contact dont la partie supérieure reçoit une seconde couche ou intercalaire souple dans un plan central duquel est inséré un élément de renforcement au niveau du talon et s'étendant vers la voûte plantaire.French Patent No. 2,520,886 relates to an athletic shoe comprising a laminated sole composed of a first layer or sole of contact whose upper part receives a second layer or flexible interlayer in a central plane of which a reinforcement element is inserted at the level of the heel and extending towards the arch.

Dans ce cas, l'efficacité de la seconde couche qui est une couche de confort se trouve perturbée par la présence de l'élément de renforcement dans son plan central.In this case, the effectiveness of the second layer which is a comfort layer is disturbed by the presence of the reinforcing element in its plane central.

De plus, la présence d'une partie inférieure de l'intercalaire située entre l'élément de renforcement et la semelle de contact, augmente d'autant la hauteur et le poids de l'ensemble.In addition, the presence of a lower part of the interlayer located between the reinforcement element and the contact sole, thereby increasing the height and the weight of the whole.

Il est également connu, sous la marque commerciale "HANWAG", une chaussure de montagne, qui propose une semelle constituée, dans un sens de bas en haut, d'une couche de contact externe sur laquelle est superposée successivement une couche amortissante puis une première de montage très rigide munie d'un insert anti-torsion.It is also known, under the trademark "HANWAG", a mountain shoe, which offers a sole made up, in a direction of bottom above, an external contact layer on which is superimposed successively a shock absorbing layer then a very first assembly rigid with anti-twist insert.

Une chaussure également connue sous la marque commerciale "ASOLO" diffère essentiellement en ce que la couche amortissante se limite à la zone du talon et se loge dans un évidement correspondant ménagé dans la couche de contact externe.A shoe also known under the trademark "ASOLO" essentially differs in that the cushioning layer is limited to the area of the heel and fits in a corresponding recess in the layer of external contact.

Dans ces deux derniers cas l'inconvénient majeur réside dans le fait que la couche rigide se trouve immédiatement en contact avec le pied et confère à la semelle une trop grande rigidité en flexion. De plus, les ondes de choc sont davantage perceptibles par le pied.In the latter two cases the major drawback lies in the fact that the rigid layer is immediately in contact with the foot and gives the sole too stiff in flexion. In addition, shock waves are more noticeable by the foot.

La demanderesse a également proposé dans le brevet n° 2 556 569 une solution consistant à réaliser une semelle externe en faisant appel à l'utilisation d'au moins deux matériaux plastiques de caractéristiques mécaniques différentes et à la technique du surmoulage.The applicant has also proposed in patent No. 2,556,569 a solution consisting in making an outer sole using the use at least two plastic materials with different mechanical characteristics and the overmolding technique.

En fait, une telle semelle comporte un élément raidisseur ou cambrion en matériau plastique rigide, élastiquement déformable, présentant une zone de flexion, au moins dans la zone métatarso-phalangienne, sous la forme de lames transversales espacées, et séparées par des ponts de moindre épaisseur et sur lequel est rapporté, par surmoulage, un matériau plastique souple, élastiquement déformable. Les ponts comportent des ouvertures à travers lesquelles peut passer la matériau de surmoulage souple, et sont conformés de manière à se rompre en rendant les lames rigides, indépendantes les unes des autres lors de la première utilisation de la semelle, leur liaison étant alors simplement assurée par le matériau plastique souple.In fact, such a sole has a stiffening element or shank in rigid, elastically deformable plastic material having a zone of flexion, at least in the metatarsophalangeal zone, in the form of blades spaced transverse, and separated by bridges of lesser thickness and on which is added, by overmolding, a flexible plastic material, elastically deformable. Bridges have openings through which can pass the flexible overmolding material, and are shaped so as to rupture in making the blades rigid, independent of each other during the first use of the sole, their connection then being simply ensured by the material flexible plastic.

Une telle solution s'est avérée coûteuse étant donné la complexité du moule à réaliser et de l'installation d'injections simultanées à mettre en oeuvre et de plus, ne propose pas une couche de confort.Such a solution has proven to be expensive given the complexity of the mold. performing and installing simultaneous injections to be implemented and moreover, does not offer a layer of comfort.

Or, ce qui est recherché, c'est précisément :

  • l'obtention d'un plus grand confort de marche qui ne soit pas neutralisé par un raidisseur inadéquatement disposé dans la semelle;
  • l'amélioration des caractéristiques d'amortissement et d'adhérence au sol;
  • la recherche d'un compromis entre une semelle la plus légère possible et offrant les meilleures qualités d'adhérences sur le sol, de résistance à l'abrasion et de rigidité en torsion, tout en restant relativement souple en flexion.
What is sought is precisely:
  • obtaining greater walking comfort which is not neutralized by a stiffener inadequately placed in the sole;
  • improved cushioning and grip characteristics;
  • the search for a compromise between the lightest possible sole and offering the best qualities of grip on the ground, abrasion resistance and torsional rigidity, while remaining relatively flexible in flexion.

Une telle rigidité ne peut pas être atteinte avec des semelles en caoutchouc uniquement car elles devraient être trop épaisses et par conséquent, seraient trop lourdes. Par ailleurs, il est difficile de contrôler précisément la rigidité d'une semelle en caoutchouc, notamment selon des directions différentes. Such stiffness cannot be achieved with rubber soles only because they should be too thick and therefore would be too heavy. Furthermore, it is difficult to precisely control the stiffness of a sole made of rubber, in particular in different directions.

De plus, il est souhaité, dans un but de standardisation et d'économie, d'avoir un concept de semelle modulable pouvant être adaptée facilement et à moindre coût à différentes utilisations et pratique de sports (montagne, golf, vélo,......etc).In addition, it is desired, for the purpose of standardization and economy, to have a modular sole concept that can be adapted easily and at a lower cost cost for different uses and practice of sports (mountain, golf, bicycle, ...... etc).

La présente invention a pour but de remédier aux inconvénients précités et d'atteindre les résultats suivants à savoir :

  • réaliser une semelle selon un concept modulable et présentant les fonctions recherchées d'adhérence, résistance à l'abrasion, rigidité en torsion et en flexion, en vue de répondre aux besoins extrêmes de la segmentation de la haute à la moyenne montagne, en ce qui concerne la randonnée, ou bien en matière de ski en général, ou de tout autre sport;
  • gagner en performance en appliquant les principes suivants :
    • pour avoir une chaussure performante, il faut se rapprocher du pied nu;
    • la chaussure doit être la plus légère possible;
    • elle doit respecter le mouvement naturel du pied;
    • elle doit amortir ou répartir les points d'impact tout en restituant l'énergie;
    • assurer la marche en tout type de terrain;
  • éviter les traumatismes, c'est-à-dire:
    • ne pas perturber le mouvement naturel du pied;
    • ne pas couper les sensations du sol;
    • ne pas couper la circulation du sang;
    • redonner la sensation d'effet de pompe lors de la marche (problème de circulation du sang).
The object of the present invention is to remedy the aforementioned drawbacks and to achieve the following results, namely:
  • make a sole according to a modular concept and presenting the desired functions of grip, abrasion resistance, torsional and flexural stiffness, in order to meet the extreme needs of segmentation from high to medium mountains, in terms of concerns hiking, or in terms of skiing in general, or any other sport;
  • gain performance by applying the following principles:
    • to have a high-performance shoe, you have to get close to the bare foot;
    • the shoe should be as light as possible;
    • it must respect the natural movement of the foot;
    • it must absorb or distribute the impact points while restoring energy;
    • ensure walking on all types of terrain;
  • avoid trauma, that is to say:
    • not to disturb the natural movement of the foot;
    • do not cut the sensations of the ground;
    • do not cut off blood circulation;
    • restore the feeling of pump effect when walking (problem of blood circulation).

Dans ce but, la présente invention, telle que définie dans la revendication 1, concerne une semelle de chaussure de sport réalisée suivant un profil stratifié en plusieurs couches remplissant respectivement des fonctions distinctes, laquelle semelle est surmontée d'une tige et comporte ou pas à sa partie arrière, un talon externe.For this purpose, the present invention, as defined in claim 1, relates to a shoe sole of sport made according to a laminated profile in several layers filling respectively separate functions, which sole is surmounted by a rod and includes or not at its rear part, an external heel.

Elle se caractérise en ce qu'elle comprend au moins trois couches réparties de la manière suivante :

  • une couche externe dite de contact, qui présente des propriétés déterminées de souplesse, d'adhérence, et résistance à l'abrasion, aptes à permettre à la fois un bon déroulement du pied, une bonne accroche sur le sol et une bonne résistance à l'usure;
  • une couche supérieure dite de confort disposée directement sous le pied, présentant des propriétés d'absorption élastique des chocs et assemblée directement sur une surface de prise de montage de la tige de la chaussure ou par l'intermédiaire d'une première de montage;
  • une couche intermédiaire ou nerf de la semelle, disposée directement entre la partie supérieure de la couche de contact, par une de ses faces, et la partie inférieure de la couche de confort par son autre face, et présentant des propriétés contrôlées de rigidité en torsion et en flexion, qui assure simultanément la répartition des zones de choc enregistrées par la couche de contact et leur diffusion sur la couche de confort, avant de rencontrer le pied.
It is characterized in that it comprises at least three layers distributed as follows:
  • an external so-called contact layer, which has determined properties of flexibility, adhesion, and abrasion resistance, capable of allowing at the same time a good unrolling of the foot, a good grip on the ground and a good resistance to l 'wear;
  • a so-called upper comfort layer placed directly under the foot, having elastic shock absorption properties and assembled directly on a mounting surface for fitting the boot upper or by means of a first mounting;
  • an intermediate layer or nerve of the sole, disposed directly between the upper part of the contact layer, by one of its faces, and the lower part of the comfort layer by its other face, and having controlled torsional stiffness properties and in flexion, which simultaneously distributes the shock zones recorded by the contact layer and their distribution over the comfort layer, before meeting the foot.

Par cette construction en trois couches distinctes ayant chacune une ou plusieurs fonctions bien déterminées, on obtient un concept modulable de semelle dont les fonctions globales peuvent être modifiées par la modification d'une seule couche, ce qui est particulièrement appréciable pour la conception et fabrication de telles semelles.By this construction in three distinct layers each having one or several well-defined functions, we obtain a modular concept of sole whose overall functions can be modified by modifying a single layer, which is particularly valuable for the design and manufacture of such soles.

Par ailleurs, le fait de placer la couche confort directement entre le pied et la couche "nerf" permet de supprimer toute interférence de cette couche nerf sur le confort et permet donc d'obtenir un confort optimum.Furthermore, placing the comfort layer directly between the foot and the nerve layer removes any interference from this nerve layer on the comfort and therefore provides optimum comfort.

Enfin, l'efficacité de la couche externe ou de contact est améliorée du fait du contact et de la coopération directe de la couche nerf avec cette couche externe, la couche nerf constituant alors pour la couche de contact une sorte de carcasse empêchant les déformations d'ensemble de la couche de contact à la manière d'une carcasse radiale de pneu de voiture, et permettant l'utilisation de gommes plus tendres donc plus adhérentes.Finally, the efficiency of the outer or contact layer is improved due to the contact and direct cooperation of the nerve layer with this outer layer the nerve layer then constituting for the contact layer a kind of carcass preventing overall deformation of the contact layer in the way of a radial carcass of a car tire, and allowing the use of rubbers more tender therefore more adherent.

L'invention sera mieux comprise et d'autres caractéristiques de celle-ci seront mises en évidence à l'aide de la description qui suit, en référence aux dessins schématiques annexés, illustrant à titre d'exemples non limitatifs, comment l'invention peut être réalisée et dans lesquels :

  • la figure 1 est une vue de profil d'une chaussure de sport, munie d'une semelle selon l'invention;
  • la figure 2 est une vue en coupe transversale de la chaussure selon la ligne II-II de la figure 1;
  • les figures 3 et 4 montrent respectivement en vue de dessus et de côté, un mode de réalisation d'une couche de confort supérieure destinée à être montée en combinaison avec une couche intermédiaire rigide ou nerf et une couche inférieure de contact avec le sol (non représentée sur le dessin) pour former la semelle selon l'invention;
  • les figures 5 et 6 montrent respectivement des couches intermédiaires rigides ou nerfs obtenues selon deux modes de réalisation différents;
  • les figures 7 et 8 montrent respectivement en coupe longitudinale et en vue de dessus un mode de réalisation d'une couche de contact et d'une couche intermédiaire rigide ou nerf (la couche confort n'étant pas représentée sur le dessin);
  • les figures 9, 10, 11 montrent respectivement en coupe longitudinale, en vue de dessus et en coupe longitudinale une couche intermédiaire rigide et une couche de contact obtenues par surmoulage selon deux modes de réalisation particuliers (la couche confort n'étant pas représentée);
  • la figure 12 est une vue en coupe longitudinale d'une semelle complète selon un mode de réalisation particulier du talon;
  • la figure 13 est une vue de dessous schématique d'une couche de contact avec le sol selon un mode de réalisation particulier;
  • la figure 14 est une vue de dessous d'une couche de contact avec le sol selon un autre mode de réalisation;
  • les figures 15 et 16 représentent respectivement en perspective et en coupe transversale selon la ligne XVI-XVI, une semelle tri-couche réalisée à partir de deux matériaux selon un mode de réalisation particulier;
  • la figure 17 représente une vue partielle en perspective d'une extrémité d'une semelle, (dont la couche de confort n'est pas représentée), montrant l'intégration d'un insert dans la couche intermédiaire rigide ou nerf;
  • la figure 18 représente partiellement une vue en coupe longitudinale d'une semelle, montrant l'intégration de crampons dans la couche intermédiaire rigide ou nerf (la couche confort n'étant pas représentée).
The invention will be better understood and other characteristics thereof will be highlighted with the aid of the description which follows, with reference to the appended schematic drawings, illustrating by way of nonlimiting examples, how the invention can be performed and in which:
  • Figure 1 is a side view of a sports shoe, provided with a sole according to the invention;
  • Figure 2 is a cross-sectional view of the shoe along the line II-II of Figure 1;
  • Figures 3 and 4 show respectively in top view and side view, an embodiment of an upper comfort layer intended to be mounted in combination with a rigid intermediate layer or nerve and a lower layer of contact with the ground (not shown in the drawing) to form the sole according to the invention;
  • Figures 5 and 6 respectively show rigid intermediate layers or nerves obtained according to two different embodiments;
  • Figures 7 and 8 show respectively in longitudinal section and in top view an embodiment of a contact layer and a rigid intermediate layer or nerve (the comfort layer is not shown in the drawing);
  • Figures 9, 10, 11 show respectively in longitudinal section, in top view and in longitudinal section a rigid intermediate layer and a contact layer obtained by overmolding according to two particular embodiments (the comfort layer not being shown);
  • Figure 12 is a longitudinal sectional view of a complete sole according to a particular embodiment of the heel;
  • Figure 13 is a schematic bottom view of a contact layer with the ground according to a particular embodiment;
  • Figure 14 is a bottom view of a contact layer with the ground according to another embodiment;
  • Figures 15 and 16 show respectively in perspective and in cross section along the line XVI-XVI, a three-layer sole made from two materials according to a particular embodiment;
  • FIG. 17 represents a partial perspective view of one end of a sole, (the comfort layer of which is not shown), showing the integration of an insert into the rigid intermediate layer or nerve;
  • FIG. 18 partially represents a view in longitudinal section of a sole, showing the integration of studs in the rigid intermediate layer or nerve (the comfort layer not being shown).

La chaussure de sport 1 représentée à titre de premier exemple de réalisation sur les figures 1 et 2 comporte une semelle externe 2, désignée dans son ensemble, sur laquelle est montée une tige 3 présentant de façon connue en soi une ouverture pour permettre le passage du pied 4, cette ouverture étant munie d'un système de fermeture 5 tel qu'un système de laçage. La partie arrière de la semelle 2 comporte un talon 6.The sports shoe 1 shown as a first example of embodiment in Figures 1 and 2 has an outer sole 2, designated in its assembly, on which is mounted a rod 3 having in a manner known per se an opening to allow the passage of the foot 4, this opening being provided a closure system 5 such as a lacing system. The rear part of the sole 2 has a heel 6.

La semelle 2 est réalisée suivant un profil stratifié, comme représenté sur la figure 2, composé de plusieurs couches remplissant respectivement des fonctions distinctes.The sole 2 is produced according to a laminated profile, as shown in the figure 2, composed of several layers respectively fulfilling functions separate.

Selon l'invention et selon le présent exemple de réalisation, la semelle 2 comprend trois couches 7, 8, 9 réparties de la manière suivante :

  • une couche externe 7 qui présente des propriétés de souplesse, d'adhérence et de résistance à l'abrasion aptes à permettre à la fois un bon déroulement du pied et une bonne accroche sur le sol et à garantir une bonne résistance à l'usure;
  • une couche supérieure 8 dite de confort, disposée directement sous la tige 3 donc sous le pied 4, présentant des propriétés d'absorption élastique des chocs et assemblée directement sur une surface de prise de montage 3a de la tige 3 de la chaussure 1 ou par l'intermédiaire d'une première de montage (non représentée);
  • une couche intermédiaire ou nerf 9 de la semelle 2, disposée directement entre la partie supérieure de la couche de contact 7, par une de ses faces 9a, et la partie inférieure de la couche de confort 8 par son autre face 9b. Cette couche 9 présente des propriétés contrôlées de rigidité en torsion et en flexion, qui assure simultanément la répartition des zones de chocs enregistrés par la couche de contact 7 et leur diffusion sur la couche de confort 8 avant de rencontrer le pied 4.
According to the invention and according to the present embodiment, the sole 2 comprises three layers 7, 8, 9 distributed as follows:
  • an outer layer 7 which has properties of flexibility, adhesion and resistance to abrasion capable of allowing both a good rolling of the foot and a good grip on the ground and guaranteeing good resistance to wear;
  • an upper layer 8 called comfort, placed directly under the upper 3 therefore under the foot 4, having elastic shock absorption properties and assembled directly on a mounting grip surface 3a of the upper 3 of the shoe 1 or by through a first assembly (not shown);
  • an intermediate layer or nerve 9 of the sole 2, disposed directly between the upper part of the contact layer 7, by one of its faces 9a, and the lower part of the comfort layer 8 by its other face 9b. This layer 9 has controlled properties of torsional and flexural rigidity, which simultaneously ensures the distribution of the shock zones recorded by the contact layer 7 and their diffusion over the comfort layer 8 before meeting the foot 4.

La couche de confort 8 est réalisée soit dans un matériau souple de densité uniforme ou bien de densité progressive augmentant de sa partie supérieure vers sa partie inférieure, en contact avec le nerf intermédiaire rigide 9.The comfort layer 8 is made either of a flexible material of density uniform or progressive density increasing from its upper part towards its lower part, in contact with the rigid intermediate nerve 9.

Selon un mode de réalisation particulier représenté sur les figures 3 et 4, la couche de confort 8 est composée de plusieurs zones distinctes adjacentes, une première zone 8a de grande élasticité correspondant au talon, une seconde zone 8b d'élasticité moyenne correspondant à la voûte plantaire favorisant la circulation du sang, une troisième zone 8c de faible élasticité favorisant le contrôle de la marche.According to a particular embodiment shown in Figures 3 and 4, the comfort layer 8 is made up of several separate adjacent areas, one first zone 8a of high elasticity corresponding to the heel, a second zone 8b of average elasticity corresponding to the arch favoring circulation of the blood, a third zone 8c of low elasticity favoring the control of the market.

Selon un mode de réalisation particulier, notamment en torsion, la rigidité de la couche intermédiaire ou nerf 9 est de valeur constante en tout point, cette valeur étant adéquatement sélectionnée en cours de fabrication en fonction de la destination de la chaussure (figure 5).According to a particular embodiment, in particular in torsion, the rigidity of the intermediate layer or nerve 9 is of constant value at all points, this value being suitably selected during manufacture according to the destination of the shoe (Figure 5).

Cette couche 9 peut aussi être constituée par un nerf 9A composé d'une pluralité de zones 9a, 9b, 9c s'étendant de part et d'autre d'un axe de torsion x-x' et dont les valeurs de rigidité sont différentes et adéquatement sélectionnées en cours de fabrication en fonction de la destination de la chaussure.This layer 9 can also be constituted by a nerve 9A composed of a plurality of zones 9a, 9b, 9c extending on either side of a twist axis x-x ' and whose stiffness values are different and suitably selected in manufacturing course depending on the destination of the shoe.

Par exemple, le nerf 9A peut être constitué d'une zone arrière 9a rigide, d'une zone intermédiaire 9b semi-rigide apte à favoriser la flexion dans la zone des métatarses du pied 4 et une zone rigide avant 9c dans la zone des phalanges, pour des chaussures particulièrement destinées à la marche en haute montagne (figure 6).For example, the nerve 9A can consist of a rigid rear region 9a, a semi-rigid intermediate zone 9b capable of promoting flexion in the zone of metatarsals of foot 4 and a rigid front region 9c in the phalanx area, for shoes particularly intended for walking in high mountains (figure 6).

Ou encore, le nerf 9A peut être constitué d'une zone arrière 9a rigide, d'une zone intermédiaire 9b souple, favorisant plus largement la flexion dans la zone des métatarses du pied 4 et le déroulement du pied et une zone avant 9 c rigide, dans la zone des phalanges, pour des chaussures particulièrement destinées à la marche en moyenne montagne (figure 6).Or, the nerve 9A can consist of a rigid rear region 9a, a flexible intermediate zone 9b, more generally promoting flexion in the zone of metatarsals of the foot 4 and the unfolding of the foot and a front zone 9 c rigid, in the phalanx area, for shoes particularly intended for walking in the middle mountains (Figure 6).

On peut également imaginer de réaliser la couche nerf 9 dans un matériau composite présentant des caractéristiques de rigidité/flexion différentes selon les différents axes et présentant notamment en même temps une grande rigidité à la torsion (dans une direction perpendiculaire à l'axe x-x') et une certaine souplesse en flexion selon l'axe x-x'.We can also imagine making the nerve layer 9 in a material composite with different stiffness / bending characteristics depending on the different axes and in particular presenting at the same time a great rigidity to the twist (in a direction perpendicular to the x-x 'axis) and some flexibility in bending along the axis x-x '.

Selon un exemple de réalisation particulier représenté sur les figures 7 et 8 dans lequel la couche confort 8 n'est pas représentée, la couche intermédiaire rigide ou nerf 9B est constituée, au moins dans la zone des métatarses, d'une succession d'inserts rigides 10 disposés en alternance perpendiculairement à l'axe de torsion x-x' de ladite semelle, de manière à obtenir une bonne souplesse en flexion tout en conservant une bonne raideur en torsion, ces inserts 10 pouvant être obtenus dans la même opération de moulage que le reste de la couche nerf 9B.According to a particular embodiment shown in Figures 7 and 8 in which the comfort layer 8 is not shown, the intermediate layer rigid or nerve 9B consists, at least in the metatarsal area, of a succession of rigid inserts 10 arranged alternately perpendicular to the axis of twist x-x 'of said sole, so as to obtain good flexibility in bending while retaining good torsional stiffness, these inserts 10 can be obtained in the same molding operation as the rest of the nerve layer 9B.

Préférentiellement, les inserts 10 constituant le nerf 9B sont réalisés au cours d'une même opération de moulage de cette couche 9B avec la couche de contact 7.Preferably, the inserts 10 constituting the nerve 9B are produced during of the same operation of molding this layer 9B with the contact layer 7.

Selon un autre exemple de réalisation représenté sur les figures 9 et 10, la couche intermédiaire ou nerf 9C comporte à proximité de sa partie avant et de sa partie arrière, deux évidements en arc de cercle 11a, 11b, sensiblement correspondants aux extrémités de la semelle et aptes à permettre le passage de deux butées 12, 13 issues de la couche de contact 7 et sur les faces internes desquelles sont collées des parties de tige 3.According to another embodiment shown in Figures 9 and 10, the intermediate layer or nerve 9C has near its front part and its rear part, two recesses in an arc 11a, 11b, substantially corresponding to the ends of the sole and capable of allowing the passage of two stops 12, 13 from the contact layer 7 and on the internal faces which are stuck parts of rod 3.

Cette dernière solution offre en outre l'avantage qu'un épaulement 14, 15 perpendiculaire aux faces externes des butées 12, 13 subsiste entre celles-ci et le plan supérieur du nerf 9C, de manière à obtenir une surface d'accroche destinée à la mise en place de crampons de glacier dans une chaussure de haute montagne. Dans la variante de réalisation représentée sur la figure 11, les butées 12, 13 sont également issues de la couche de contact 7, mais ce sont elles qui présentent des évidements respectivement 12a, 13a pour le passage de la couche nerf 9c qui ne présente alors aucun évidement.The latter solution also has the advantage that a shoulder 14, 15 perpendicular to the external faces of the stops 12, 13 remain between them and the superior plane of the nerve 9C, so as to obtain an attachment surface intended for the installation of glacier crampons in a high mountain shoe. In the variant embodiment shown in FIG. 11, the stops 12, 13 are also from contact layer 7, but they are the ones that have recesses respectively 12a, 13a for the passage of the nerve layer 9c which does not then presents no recess.

La variante de réalisation représentée sur la figure 12 montre une semelle 2A dans laquelle la couche de confort 8A comprend à sa partie arrière un talon compensé 6A obtenu de manière monobloc avec ladite couche 8A et remplaçant le talon externe 6 de la chaussure 1. De ce fait, la couche de contact 7 présente une épaisseur sensiblement uniforme sur toute sa longueur.The variant embodiment shown in FIG. 12 shows a sole 2A in which the comfort layer 8A comprises at its rear part a heel compensated 6A obtained in a single piece with said layer 8A and replacing the outer heel 6 of the shoe 1. Therefore, the contact layer 7 has a substantially uniform thickness over its entire length.

Selon une autre variante représentée sur les figures 15 et 16, la couche confort est constituée par des reliefs 8B obtenus de matière sur la partie supérieure 7a de la couche de contact 7, de forme correspondante à des évidements 16 de la couche intermédiaire ou nerf 9D, qu'ils traversent pour en déboucher selon une valeur égale à l'épaisseur de la couche confort à obtenir. La couche 9D peut être également simplement surmoulée sur la couche contact 7 présentant ces reliefs 8B.According to another variant shown in Figures 15 and 16, the layer comfort consists of reliefs 8B obtained from material on the upper part 7a of the contact layer 7, of shape corresponding to recesses 16 of the intermediate layer or nerve 9D, which they pass through to emerge in a value equal to the thickness of the comfort layer to be obtained. The 9D layer can be also simply overmolded on the contact layer 7 having these reliefs 8B.

Dans l'exemple représenté, les reliefs 8B sont constitués par des picots uniformément répartis dans la zone des métatarses et du talon. Bien entendu, ils pourraient couvrir toute la surface du pied.In the example shown, the reliefs 8B consist of spikes uniformly distributed in the metatarsal and heel area. Of course, they could cover the entire surface of the foot.

Cette solution présente l'avantage de pouvoir obtenir une semelle tri-couches selon l'invention, à partir de deux matériaux seulement, la souplesse de la couche confort 8B à obtenir étant fonction de la densité et/ou de la géométrie des picots la constituant. This solution has the advantage of being able to obtain a three-layer sole according to the invention, from only two materials, the flexibility of the layer 8B comfort to be obtained depending on the density and / or the geometry of the pins component.

La figure 13 montre un mode de réalisation particulier d'une couche de contact 7A constituée d'une pluralité de zones, dont une première zone périphérique 17 qui correspond à une zone principale d'accroche mécanique sur le sol, une seconde zone centrale avant 18 correspondant à une zone secondaire de maintien ou d'adhérence et une troisième zone centrale arrière 19 neutre.FIG. 13 shows a particular embodiment of a layer of contact 7A consisting of a plurality of zones, including a first zone peripheral 17 which corresponds to a main area of mechanical grip on the ground, a second central zone before 18 corresponding to a secondary zone holding or grip and a third central rear area 19 neutral.

Lors de la marche, le premier contact avec le sol s'effectue principalement sur la périphérie 17 de la semelle, celle-ci est par conséquent étudiée pour résister au maximum à l'usure et ne pas s'encrasser afin de conserver toute son adhérence.When walking, the first contact with the ground takes place mainly on the periphery 17 of the sole, it is therefore designed to resist maximum wear and do not clog to keep all its adhesion.

Selon une variante représentée sur la figure 14, la couche de contact 7B est réalisée par des patins rapportés extérieurement sur le nerf 9 dans des évidements 20 prévus à cet effet dans ce dernier et qui sont d'une hauteur inférieure à celle des patins proprement dits.According to a variant shown in FIG. 14, the contact layer 7B is produced by pads attached externally to the nerve 9 in recesses 20 provided for this purpose in the latter and which are of a height less than that of the skates proper.

Préférentiellement, ces patins 7B sont répartis de part et d'autre de l'axe de torsion longitudinal, en l'occurrence de part et d'autre d'une rainure centrale d'une chaussure de ski de fond.Preferably, these pads 7B are distributed on either side of the axis of longitudinal torsion, in this case on either side of a central groove of a cross-country ski boot.

Selon un exemple d'application de l'invention aux chaussures de ski de fond ou de randonnée nordique (figure 17), la couche intermédiaire rigide 9E est utilisée pour une accroche mécanique d'une boucle de fixation 21 destinée à coopérer avec une fixation de type charnière, comportant ou non un insert de renfort métallique interne, ledit insert et/ou la boucle 21 étant surmoulés dans ladite couche rigide intermédiaire 9E, tel que décrit dans la demande de brevet n°91 04126 déposée par la demanderesse. Bien entendu, la couche rigide peut être utilisée pour tout autre exemple d'accroche mécanique d'un interface.According to an example of application of the invention to cross-country ski boots or Nordic hiking (Figure 17), the rigid intermediate layer 9E is used for mechanical attachment of a fixing loop 21 intended to cooperate with a hinge-type fixing, with or without a reinforcement insert internal metal, said insert and / or loop 21 being overmolded in said rigid intermediate layer 9E, as described in patent application No. 91 04126 filed by the plaintiff. Of course, the rigid layer can be used for any other example of mechanical attachment of an interface.

Par exemple, la couche intermédiaire rigide ou nerf 9 peut être utilisée pour une accroche mécanique d'un insert métallique qui coopère avec la fixation d'une pédale dans une application au vélo, l'insert étant surmoulé dans ladite couche rigide intermédiaire 9 (exemple non représenté sur les dessins).For example, the rigid intermediate layer or nerve 9 can be used to a mechanical attachment of a metal insert which cooperates with the fixing of a pedal in a bicycle application, the insert being overmolded in said layer rigid intermediate 9 (example not shown in the drawings).

Selon un autre exemple d'application aux chaussures de golf (figure 18), la couche intermédiaire rigide ou nerf 9F permet une accroche mécanique des crampons (non représentés), par vissage. Pour ce faire, des logements filetés 22 sont réalisés à la partie inférieure du nerf 9F.According to another example of application to golf shoes (FIG. 18), the rigid intermediate layer or nerve 9F allows mechanical attachment of studs (not shown), by screwing. To do this, threaded housings 22 are performed at the lower part of the nerve 9F.

Préférentiellement, la dureté des différentes couches composant la semelle sont les suivantes :

  • la couche intermédiaire ou nerf 9, 9A, 9B, 9C, 9D, 9E, 9F, a une dureté supérieure à 45 Shore D;
  • la couche de contact 7, 7A, 7B avec le sol, a une dureté inférieure à 45 Shore D;
  • la couche de confort 8, 8A, 8B, a une dureté inférieure à 80 Shore A.
Preferably, the hardness of the different layers making up the sole are as follows:
  • the intermediate layer or nerve 9, 9A, 9B, 9C, 9D, 9E, 9F, has a hardness greater than 45 Shore D;
  • the contact layer 7, 7A, 7B with the soil, has a hardness less than 45 Shore D;
  • the comfort layer 8, 8A, 8B, has a hardness less than 80 Shore A.

Egalement, selon un mode de réalisation préféré de l'invention, la couche de contact 7, 7A, 7B avec le sol, est du caoutchouc ayant des qualités d'adhérence et de résistance à l'abrasion.Also, according to a preferred embodiment of the invention, the layer of contact 7, 7A, 7B with the ground, is rubber having qualities of adhesion and abrasion resistance.

Mais cela n'exclut pas que la couche de contact 7, 7A, 7B avec le sol peut être également un polyuréthane ou tout autre matériau thermoplastique.But this does not exclude that the contact layer 7, 7A, 7B with the ground can be also a polyurethane or any other thermoplastic material.

En ce qui concerne la couche intermédiaire rigide ou nerf 9, 9A, 9B, 9C, 9D, 9E, 9F, celle-ci peut être composée par un polyuréthane chargé ou non (fibre de verre, carbone, etc.), par un polyamide chargé ou non, par un polyéthylène chargé ou non ou tout autre thermoplastique.Regarding the rigid intermediate layer or nerve 9, 9A, 9B, 9C, 9D, 9E, 9F, this can be composed of a loaded or unloaded polyurethane (fiber of glass, carbon, etc.), with a loaded or unfilled polyamide, with a loaded polyethylene or not or any other thermoplastic.

Il est également à noter que chacune des couches 7, 8, 9 de la semelle 2 peut s'étendre ou non sur toute la surface de ladite semelle (cf par exemple le mode de réalisation des figures 14 et 15).It should also be noted that each of the layers 7, 8, 9 of the sole 2 can extend or not extend over the entire surface of said sole (cf. for example the mode of realization of Figures 14 and 15).

Enfin, la liaison des couches 7, 8, 9 entre elles constituant la semelle 2 s'effectue par tout moyen tel que collage, surmoulage, ultrason.Finally, the connection of layers 7, 8, 9 to each other constituting the sole 2 is carried out by any means such as bonding, overmolding, ultrasound.

Claims (23)

  1. Sole (2) for a sports shoe (1) surmounted by an upper and made with a laminated profile in several layers comprising an outer layer contacting the ground having adhesion and abrasion resistant properties and an intermediate layer having properties of rigidity and being directly in contact with the contact layer, characterized in that it includes an upper comfort layer (8, 8A, 8B), placed directly under the foot (4), having cushioning and/or elastic properties regarding impacts, and in that the intermediate layer has controlled torsional and flexural rigidity properties so as simultaneously to ensure the distribution of shock waves and forces registered by the contact layer (7, 7A, 7B) and their dissipation before encountering the foot, and to constitute a type of casing preventing deformations of the entire contact layer, while remaining relatively flexible on flexing so as to allow the foot to move during sports activities, obtaining in this way a modifiable design for the sole, of which the overall functions may be modified by modifying a single layer.
  2. Sole according to claim 1, characterized in that the comfort layer (8) is made of a flexible material with a progressive density increasing from its upper part to its lower part in contact with the rigid intermediate stiffener (9, 9A, 9B, 9C, 9D, 9E, 9F).
  3. Sole according to claim 1, characterized in that the comfort layer (8) is composed of several adjacent distinct layers; a first zone (8a) of high elasticity corresponding to the heel; a second zone (8b) of medium elasticity corresponding to the arch of the foot promoting the blood circulation; and a third zone 8c of low elasticity promoting controlled walking.
  4. Sole according to claim 1, characterized in that the rigidity of the intermediate layer or stiffener (9) has substantially a constant value at any point, this value being suitably selected during manufacture in relation to the intended use of the shoe.
  5. Sole according to claim 1, characterized in that the intermediate layer or stiffener (9A) consists of a plurality of zones (9a, 9b, 9c) extending either side of a torsion axis (x-x') of which the rigidity values are different and suitably selected during manufacture in relation to the intended use of the shoe.
  6. Sole according to claim 5, characterized in that the stiffener (9A) consists of a rigid rear zone (9a), a semi-rigid intermediate zone (9b) capable of encouraging flexing in the metatarsal region of the foot (4) and a front rigid zone (9c) in the region of the toes.
  7. Sole according to claim 5, characterized in that the stiffener (9A) consists of a rigid rear zone (9a), a flexible intermediate zone (9b) capable of encouraging flexing in the metatarsal region of the foot (4) and a front rigid zone (9c), in the region of the toes for shoes particularly intended for walking in medium height mountains.
  8. Sole according to claim 1, characterized in that the rigid intermediate layer or stiffener (9B) consists, at least in the metatarsal region, a succession of rigid inserts (10) disposed alternately, perpendicular to the torsion axis (x-x') of the said sole, so as to obtain good flexural flexibility while preserving good stiffness in torsion.
  9. Sole according to claim 8, characterized in that the inserts (10) constituting the stiffener (9B) are produced during the same moulding operation as the stiffening layer 9B.
  10. Sole according to claim 1, characterized in that the intermediate layer or stiffener (9C) includes, in the vicinity of its front part and its rear part, two recesses in the shape of an arc of a circle (11a, 11b),
    corresponding substantially to ends of the sole and able to allow the passage of two stops (12, 13) coming from the contact layer (7) and on the inner faces of which are glued parts of the upper (3).
  11. Sole according to claim 10, characterized in that a shoulder (14, 15), perpendicular to the outer faces of the stops (12, 13) exists between the latter and the plane of the stiffener (9C) so as to obtain an attachment designed for putting glacier crampons in place, in a high mountain climbing shoe.
  12. Sole according to one of claim 1 to 3, characterized in that the comfort layer (8A) comprises, at its rear part, a wedge heel (6A) obtained in one piece with the said layer (8A) and replacing the outer heel (6) of the shoe (1).
  13. Sole according to claim 1, characterized in that the layer contacting the ground (7A) consists of a plurality Of zones of which the first peripheral zone (17) which corresponds to a principal zone for mechanically gripping the ground, a second front central zone (18) which corresponds to a secondary holding or adhesion zone and a neutral third rear central zone (19).
  14. Sole according to claim 1, characterized in that the layer in contact with the ground (7B) is made of pads connected externally to the stiffener (9) in recesses (20) provided for this purpose in the latter.
  15. Sole according to claim 1, characterized in that the comfort layer consists of raised portions (8B) obtained from material on the upper part (7a) of the contact layer (7), and passing through the intermediate layer or stiffener (9D) to emerge from it to an extent equal to the thickness of the comfort layer to be obtained.
  16. Sole according to claim 1, or one of claims 4 to 10, characterized in that the rigid intermediate layer or stiffener (9, 9E) is able to allow the mechanical attachment of an insert or fixing buckle (21) capable of cooperating with an associated fixing for assembling the sole to an element such as a ski, bicycle pedal etc, the insert being over-moulded in the said intermediate rigid layer (9, 9E).
  17. Sole according to claim 1, or one of claims 5 to 11, characterized in that the intermediate rigid layer or stiffener (9F) is able to allow the mechanical attachment of a stud, by screwing, in an application to golf shoes.
  18. Sole according to any of the preceding claims, characterized in that the intermediate layer or stiffener (9, 9A, 9B, 9C, 9D, 9E, 9F) has a hardness greater than 45 Shore D.
  19. Sole according to any of the preceding claims, characterized in that the layer (7, 7A, 7B) contacting the ground, has a hardness less than 45 Shore D.
  20. Sole according to any of the preceding claims, characterized in that the comfort layer (8, 8A, 8B) has a hardness less than 80 Shore A.
  21. Sole according to any of the preceding claims, characterized in that the layer (7, 7A, 7B) contacting the ground is made of a rubber having adhesion and abrasion resistance properties.
  22. Sole according to any of claims 1 to 20, characterized in that the layer (7, 7A, 7B) contacting the ground is made of a thermoplastic material.
  23. Sole according to any of the preceding claims, characterized in that the intermediate layer or stiffener (9, 9A, 9B, 9C, 9D, 9E, 9F) is made of a thermoplastic material.
EP92116508A 1991-12-24 1992-09-26 Multilayered athletic shoe sole Expired - Lifetime EP0548475B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9116275 1991-12-24
FR9116275A FR2685173B1 (en) 1991-12-24 1991-12-24 MULTILAYER SPORTSHOE SOLE.

Publications (2)

Publication Number Publication Date
EP0548475A1 EP0548475A1 (en) 1993-06-30
EP0548475B1 true EP0548475B1 (en) 1998-01-14

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EP92116508A Expired - Lifetime EP0548475B1 (en) 1991-12-24 1992-09-26 Multilayered athletic shoe sole

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US (2) US6079125A (en)
EP (1) EP0548475B1 (en)
AT (1) ATE162050T1 (en)
CZ (1) CZ288092B6 (en)
DE (1) DE69224050C5 (en)
ES (1) ES2113905T3 (en)
FR (1) FR2685173B1 (en)

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Publication number Priority date Publication date Assignee Title
IT1274345B (en) * 1994-04-12 1997-07-17 Nordica Spa SOLE STRENGTHENING DEVICE, ESPECIALLY FOR SPORTS FOOTWEAR.
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DE69224050T2 (en) 1998-05-28
ATE162050T1 (en) 1998-01-15
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FR2685173B1 (en) 1995-04-14
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ES2113905T3 (en) 1998-05-16
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