Sole structure for footwear

Abstract

A sole structure for footwear articles with an upper includes a sole interlayer. The sole interlayer may include a cushioning member and a base. The cushioning member extends from the forefoot region of the sole structure to the heel region. The base is disposed between the top side of the cushioning member and the upper. An outsole is attached to the bottom surface of the sole interlayer. The outsole includes a first outsole portion, a second outsole portion, and a third outsole portion. The first, second, and third outsole portions are spaced apart from each other to provide flexibility to the sole structure. The first, second, and third outsole portions may be formed of a first material and a second material. The second material is more durable than the first material.

Description

[0001] Cross-reference to related applications

[0002] This application claims priority under 35 U.S.SC §119(e) to the following applications: U.S. Provisional Patent Application Serial No. 63 / 300,259, filed January 17, 2022; U.S. Provisional Patent Application Serial No. 63 / 300,246, filed January 17, 2022; U.S. Provisional Patent Application Serial No. 63 / 300,252, filed January 17, 2022; U.S. Provisional Patent Application Serial No. 63 / 253,022, filed October 6, 2021; U.S. Provisional Patent Application Serial No. 63 / 194,327, filed May 28, 2021; and U.S. Provisional Patent Application Serial No. 63 / 194,314, filed May 28, 2021, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This disclosure generally relates to sole structures for footwear articles, and more specifically to sole structures incorporating an outsole. Background Technology

[0004] This section provides background information relating to this disclosure, which is not necessarily prior art.

[0005] Footwear typically consists of an upper and a sole structure. The upper can be formed from any suitable material (of various kinds) to receive, secure, and support the foot within the sole structure. The upper can be fitted with laces, straps, or other fasteners to adjust the fit around the foot. The bottom portion of the upper, closest to the sole surface of the foot, is attached to the sole structure.

[0006] A shoe sole structure typically comprises a layered arrangement extending between the ground and the upper. One layer of the sole structure includes the outsole, which provides abrasion resistance and traction to the ground. The outsole can be formed of rubber or other materials that impart durability and abrasion resistance, as well as enhanced traction. Another layer of the sole structure includes a midsole layer disposed between the outsole and the upper. The midsole layer provides cushioning for the foot and may be partially formed of a polymer foam material that elastically compresses under applied load to cushion the foot by attenuating ground reaction forces. The midsole layer may additionally or alternatively incorporate cushioning members to increase the durability of the sole structure and to provide cushioning for the foot by elastically compressing under applied load to attenuate ground reaction forces. The cushioning members may be fluid-filled bladders or foam elements. The sole structure may also include an insole or insole that enhances comfort and is located in a gap near the bottom portion of the upper, and the sole structure includes a strobel that is attached to the upper and positioned between the sole midsole and the insole or insole.

[0007] Midsole soles using fluid-filled bladders typically comprise a bladder formed by two sealed or bonded polymer material barrier layers. The fluid-filled bladder is pressurized with a fluid such as air and may incorporate tension members within the bladder to maintain its shape when elastically compressed under applied loads, such as during athletic activity. Typically, the bladder design emphasizes a balance between support and cushioning characteristics for the foot, which relate to the bladder's responsiveness to elastic compression under applied loads. In such respects, the midsole sole may include a base for engaging with the bladder to form a monolithic structure.

[0008] The outsole typically covers the bottom surface of the midsole and provides abrasion resistance and ground traction. This outsole is usually formed as a single piece attached to the bottom surface of the midsole. Attached Figure Description

[0009] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of this disclosure. In the drawings:

[0010] Figure 1 It is a perspective view of a footwear article including a sole structure according to the principles of the present invention;

[0011] Figure 2A yes Figure 1 An exploded top-down perspective view of the shoe sole structure;

[0012] Figure 2B yes Figure 1 An exploded bottom perspective view of the shoe sole structure;

[0013] Figure 3 It is used in Figure 1 Top perspective view of the first aspect of the cushioning element in the sole structure;

[0014] Figure 4 yes Figure 3 Bottom perspective view of the buffer component;

[0015] Figure 5A yes Figure 3 Top view of the buffer component;

[0016] Figure 5B It is used in Figure 1 A top view of another aspect of the cushioning element in the sole structure;

[0017] Figure 5C It is used for Figure 1 Another top view of the cushioning components in the shoe sole structure;

[0018] Figure 6A It is along Figure 5A The line 6A-6A cut Figure 3 A cross-sectional view of the buffer component;

[0019] Figure 6B yes Figure 5B buffer along Figure 5B Sectional view of line 6B-6B;

[0020] Figure 6C yes Figure 5C buffer along Figure 5B A sectional view taken from line 6C-6C;

[0021] Figure 7 It is along Figure 5A The line 7-7 was cut Figure 3 A cross-sectional view of the buffer component; and

[0022] Figure 8 It is along Figure 5A The line cut from 8-8 Figure 3 A cross-sectional view of the buffer component;

[0023] Figure 9 yes Figure 1 A top view of the shoe sole structure;

[0024] Figure 10 yes Figure 1 A bottom-view plan view of the shoe sole structure;

[0025] Figure 11 It is along Figure 10 The line 11-11 cut Figure 1 A cross-sectional view of the shoe sole structure;

[0026] Figure 12 It is along Figure 10 The line 12-12 cut Figure 1 A cross-sectional view of the shoe sole structure;

[0027] Figure 13 It is along Figure 10 The line 13-13 was cut off Figure 1 A cross-sectional view of the shoe sole structure;

[0028] Figure 14 It is along Figure 10 The line 14-14 was cut Figure 1 A cross-sectional view of the shoe sole structure;

[0029] Figure 15 It is along Figure 10 The line cut at 15-15 Figure 1 A sectional view of the sole structure; and

[0030] Figure 16 It is along Figure 10 The line 16-16 was cut Figure 1 A cross-sectional view of the shoe sole structure.

[0031] Throughout the accompanying figures, corresponding reference numerals denote the corresponding parts. Detailed Implementation

[0032] Example constructions will now be described more fully with reference to the accompanying drawings. Example embodiments are provided so that this disclosure will be thorough and will fully convey the scope of the disclosure to those skilled in the art. Numerous specific details, such as examples of particular components, apparatus, and methods, are set forth to provide a thorough understanding of the construction of this disclosure. It will be apparent to those skilled in the art that specific details are not required, that example constructions may be implemented in many different forms, and that the specific details and example constructions should not be construed as limiting the scope of this disclosure.

[0033] The terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. As used herein, the singular forms “a,” “an,” and “the” may also be intended to include the plural forms unless the context clearly indicates otherwise. The terms “comprising,” “including,” “containing,” and “having” are inclusive and thus specify the presence of features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. Unless expressly identified as the order of execution, the method steps, processes, and operations described herein should not be construed as having to be performed in the specific order discussed or shown. Additional or alternative steps may be employed.

[0034] When an element or layer is referred to as being "on top of" or "joined to," "connected to," "attached to," or "linked to" another element or layer, it may be directly located, joined, connected, attached to, or linked to the other element or layer, or there may be intermediate elements or layers present. Conversely, when an element is referred to as being "directly on" another element or layer, or "directly joined to," "directly connected to," "directly attached to," or "directly linked to" another element or layer, there may be no intermediate elements or layers present. Other terms used to describe relationships between elements should be interpreted in a similar manner (e.g., "between" vs. "directly between," "adjacent" vs. "directly adjacent," etc.). As used herein, the terms "and / or" include any and all combinations of one or more of the associated listed items.

[0035] The terms first, second, third, etc., may be used herein to describe various elements, components, regions, layers, and / or parts. These elements, regions, layers, and / or parts should not be limited by these terms. These terms are used only to distinguish one element, component, region, layer, or part from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer, or part discussed below may be referred to as the second element, component, region, layer, or part.

[0036] One aspect of the present invention provides a sole structure. The sole structure includes a cushioning member and a base. The cushioning member includes a first series of protruding angles arranged along the medial and lateral sides of the sole structure from a forefoot region to a heel region. The outsole has a first side attached to the cushioning member and a second side disposed on a side of the outsole opposite to the first side. The second side defines a ground contact surface of the sole structure. The outsole includes a first outsole portion and a second outsole portion. The first outsole portion has a substantially U-shaped shape and includes a first medial leg and a first lateral leg. The second outsole portion is spaced apart from and separated from the first outsole portion and has a substantially U-shaped shape including a second medial leg and a second lateral leg, the first medial leg, the first lateral leg, the second medial leg, and the second lateral leg extending toward the front end of the sole structure.

[0037] In some configurations, the cushioning element is a fluid-filled chamber. In others, the cushioning element is a solid body. The cushioning element comprises or is substantially composed of a cushioning material comprising one or more polymers. In many examples, when the cushioning element is a fluid-filled chamber, the cushioning material comprises or is substantially composed of a barrier membrane comprising a barrier material containing one or more gas-barrier compounds. The outsole comprises or is substantially composed of an outsole material comprising one or more polymers. Footwear articles incorporating the sole structures disclosed herein are also provided.

[0038] Embodiments of this disclosure may include one or more of the following optional features. In some embodiments, the second outsole portion includes an inner leg extending in a direction away from the front end.

[0039] In some configurations, the inner leg extends between the first inner leg and the first outer leg.

[0040] In some configurations, the second outsole portion includes an arcuate portion that extends between and connects the second inner leg and the second outer leg, with the inner leg extending from the arcuate portion.

[0041] The first outsole portion may include an arcuate section extending between and connecting the first medial leg and the first lateral leg. The arcuate section may extend along the rear end of the sole structure in the heel area.

[0042] In some constructions, the outsole further includes a third outsole portion spaced apart from and separated from the first and second outsole portions. The third outsole portion may include a third medial leg and a third lateral leg extending in a direction toward the front end of the sole structure. The third outsole portion may also include an arcuate portion extending between and connecting the third medial leg and the third lateral leg. The third outsole portion may also include a generally U-shape. In another aspect of the third outsole portion, the third outsole portion includes an inner leg extending from the arcuate portion in a direction away from the front end. In such an aspect, the inner leg extends between the second medial leg and the second lateral leg.

[0043] In some configurations, a portion of the cushioning element is exposed in at least one of the following locations: (i) between the first outsole portion and the second outsole portion, and (ii) between the second outsole portion and the third outsole portion.

[0044] In some constructions, the first outsole portion includes or is composed of a first outsole material, and the second outsole portion includes or is composed of a second material. In one example, the first and second outsole materials have substantially the same appearance, physical properties, and composition. Alternatively, the first and second outsole materials may differ in one or more aspects of appearance, physical properties, and composition.

[0045] The materials described herein may differ in one or more aspects of appearance, physical properties, and composition. These materials may differ in appearance in color (including hue or brightness, or both), or in transparency or translucency levels, or both. These materials may differ in one or more physical properties, such as hardness or elongation, or hardness and elongation. One or more physical properties may differ by at least 5%, at least 10%, or at least 20%. The composition of these materials may differ. For example, the materials may differ based on the type or variety of polymers present, based on the concentration of the type or variety of polymers, or based on both. The composition of the materials may differ based on the presence of additives, or based on the concentration of the additives present, or based on both. Optionally, the concentrations of one or more polymers and / or one or more additives may differ by at least 5% by weight, at least 10% by weight, or at least 20% by weight of the material.

[0046] Another aspect of the invention provides an outsole for a sole structure. The sole structure includes a cushioning member comprising a first series of convex angles arranged along the medial and lateral sides of the sole structure from a forefoot region to a heel region. The sole structure also includes an outsole having a first side attached to the cushioning member and a second side disposed on a side of the outsole opposite to the first side and defining a ground contact surface of the sole structure. The outsole includes a first outsole portion and a second outsole portion. The first outsole portion has a substantially U-shaped shape and includes a first medial leg and a first lateral leg. The second outsole portion is spaced apart from and separated from the first outsole portion and has a substantially U-shaped shape including a second medial leg and a second lateral leg. Each of the first medial leg, the first lateral leg, the second medial leg, and the second lateral leg includes a longitudinal axis extending substantially parallel to the longitudinal axis of the sole structure.

[0047] Embodiments of this disclosure may include one or more of the following optional features. In some embodiments, the second outsole portion includes an inner leg extending in a direction away from the front end of the sole structure. The inner leg may extend between a first inner leg and a first outer leg.

[0048] In some configurations, the second outsole portion includes an arcuate portion that extends between and connects the second inner leg and the second outer leg, with the inner leg extending from the arcuate portion.

[0049] In some configurations, the first outsole portion includes an arcuate section that extends between and connects the first medial leg and the first lateral leg. In one aspect, the arcuate section extends along the rear end of the sole structure in the heel region.

[0050] In some constructions, the outsole further includes a third outsole portion spaced apart from and separated from the first and second outsole portions. In such an aspect, the third outsole portion includes a third medial leg and a third lateral leg extending in a direction toward the front end of the sole structure. The third outsole portion may include an arcuate portion extending between and connecting the third medial leg and the third lateral leg. The third outsole portion may include a generally U-shape. In such an aspect, the third outsole portion includes an inner leg extending from the arcuate portion in a direction away from the front end. The inner leg may extend between the second medial leg and the second lateral leg. The third outsole portion may include or be composed of a third outsole material, or may include or be composed of a first outsole material or a second outsole material. As described above, the third outsole material may differ from the first outsole material, the second outsole material, or both, based on one or more of the appearance, physical properties, and composition.

[0051] In some configurations, a portion of the cushioning element is exposed in at least one of the following locations: (i) between the first outsole portion and the second outsole portion, and (ii) between the second outsole portion and the third outsole portion.

[0052] In some constructions, the cushioning element is a fluid-filled chamber comprising cushioning material. In another, the cushioning element is a solid body comprising cushioning material. In yet another, the cushioning element comprises a solid, fabric, or foam element encapsulated in a barrier membrane. Footwear items may be combined with an outsole.

[0053] Another aspect of the invention provides an outsole for a sole structure. The sole structure includes a cushioning member comprising a first series of protruding angles arranged along the medial and lateral sides of the sole structure from a forefoot region to a heel region. The sole structure also includes an outsole having a first side attached to the cushioning member and a second side disposed on a side of the outsole opposite to the first side and defining a ground contact surface of the sole structure. The outsole includes: a first outsole portion having a generally U-shaped shape and including a first medial leg and a first lateral leg; and a first insert attached to the first outsole portion and formed of a material different from that of the first outsole portion. In one example, the first outsole portion includes a first outsole material, and the first insert includes a second outsole material. The first and second outsole materials may have the same appearance, physical properties, and composition, or may differ from each other in at least one aspect of appearance, physical properties, and composition as described above.

[0054] In some configurations, the first insert is disposed within a recess defined by the first outsole portion, and the first insert is attached to one of the first inner leg and the first outer leg.

[0055] In some configurations, the second insert is attached to the first outsole portion and optionally includes a second outsole material, wherein the second insert is attached to another of the first inner leg and the first outer leg.

[0056] In some configurations, the first outsole portion includes an arcuate portion that extends between and connects the first inner leg and the first outer leg.

[0057] In some configurations, the second outsole portion is separated from and isolated from the first outsole portion, wherein the second outsole portion includes a generally U-shaped shape having a second inner leg and a second outer leg.

[0058] In some constructions, the cushioning element is a fluid-filled chamber. In another, the cushioning element is a solid body. In yet another aspect, the cushioning element comprises a solid, fabric, or foam element encapsulated within a barrier element. Footwear items may incorporate an outsole.

[0059] refer to Figure 1-16 A footwear article 10 is provided, comprising a sole structure 100 and an upper 300 attached to the sole structure 100. The footwear article 10 may be divided into one or more regions. The regions may include a forefoot region 12, a midfoot region 14, and a heel region 16. The forefoot region 12 may be further described as including a toe portion 12T corresponding to the metatarsophalangeal joint and a ball portion 12B corresponding to the metatarsophalangeal (MTP) joint. The midfoot region 14 may correspond to the arch region of the foot, while the heel region 16 may correspond to the posterior portion of the foot, including the calcaneus. The footwear 10 may also include a front end 18 associated with the foremost point of the forefoot region 12 and a rear end 20 corresponding to the rearmost point of the heel region 16. Figure 1 As shown, the longitudinal axis A10 of the footwear 10 extends along the length of the footwear 10 from the front end 18 to the rear end 20, and generally divides the footwear 10 into an inner side 22 and an outer side 24. Therefore, the inner side 22 and the outer side 24 correspond to opposite sides of the footwear 10 and extend through regions 12, 14, and 16, respectively.

[0060] Footwear item 10, more specifically, sole structure 100, can be further described as including a peripheral area 28 and an internal area 26, such as Figure 1 As shown. The peripheral region 28 is generally described as the region between the inner region 26 and the outer periphery of the sole structure 100. Specifically, the peripheral region 28 extends from the forefoot region 12 to the heel region 16 along each of the inner side 22 and the outer side 24, and surrounds each of the forefoot region 12 and the heel region 16. Thus, the inner region 26 is externally confined by the peripheral region 28 and extends from the forefoot region 12 to the heel region 16 along the central portion of the sole structure 100.

[0061] refer to Figure 2A and 2B The sole structure 100 includes a sole interlayer 102 configured to provide cushioning features to the sole structure 100 and an outsole 104 configured to provide a ground contact surface 30a for the footwear article 10. Unlike conventional sole structures, the sole interlayer 102 of the sole structure 100 can be formed in a composite manner and includes multiple sub-components for providing the desired form of cushioning and support throughout the sole structure 100. For example, the sole interlayer 102 includes a cushioning element 106 and a base 108, wherein the base 108 is attached to the upper 300 and provides an interface between the upper 300 and the cushioning element 106.

[0062] refer to Figure 1-5C The longitudinal axis A106 of the buffer 106 (e.g.) Figures 5A-5C(As shown) Extending from a first end 110 in the forefoot region 12 to a second end 112 in the heel region 16. The cushioning member 106 can be further described as including a top surface or top side 114 and a bottom surface or bottom side 116, the bottom surface or bottom side 116 being formed on the side of the cushioning member 106 opposite to the top side 114. See below for reference. Figure 6A , 7 As discussed in more detail in 8, the thickness T106 of the buffer 106 or the thickness T106 of the element of the buffer 106 is defined by the distance from the top side 114 to the bottom side 116.

[0063] The cushioning member 106 is configured to provide cushioning for the foot by reducing ground reaction force. In one aspect, the cushioning member 106 is a fluid-filled bladder 106A, and in another aspect, it is a foam element 106B. The difference between the fluid-filled bladder 106A and the foam element 106B lies in the attenuation of ground reaction force. For example, when the cushioning member 106 is a fluid-filled bladder 106A, fluid (air) is contained within the fluid-filled bladder 106A itself. Therefore, the fluid within the fluid-filled bladder 106A is displaced at the points of ground reaction and forced into other areas of the fluid-filled bladder 106A in the form of reaction force. However, in the case where the cushioning member 106 is a foam element 106B, the ground reaction force is absorbed by the foam element at the point of impact. Thus, the remaining portion of the foam element 106B does not experience reaction force in the same way as the fluid-filled bladder 106A. This feature is preferred for users who desire a better cushioning response than that provided by the fluid-filled bladder 106A.

[0064] like Figure 6A , Figure 7 and Figure 8 As shown in the cross-sectional view, the buffer 106 is a flow-filled bladder 106A, which can be formed from a pair of opposing barrier layers 118, which can be interconnected at discrete locations to define the overall shape of the buffer 106. Alternatively, the bladder 106A can be made from any suitable combination of one or more barrier layers. As used herein, the term "barrier layer" (e.g., barrier layer 118) includes monolayer and multilayer films. In some configurations, one or both of the barrier layers 118 are made from a monolayer film (monolayer) (e.g., thermoformed or blow-molded). In other configurations, one or both of the barrier layers 118 are made from a multilayer film (multiple sublayers) (e.g., thermoformed or blow-molded). In either case, each layer or sublayer can have a film thickness ranging from about 0.2 micrometers to about 1 millimeter. In further configurations, the film thickness of each layer or sublayer can range from about 0.5 micrometers to about 500 micrometers. In other configurations, the thickness of each layer or sublayer can range from about 1 micrometer to about 100 micrometers.

[0065] One or both of the barrier layers 118 may be independently transparent, translucent, and / or opaque. As used herein, for barrier layers and / or capsules, the term "transparent" means that light passes through the barrier layer in a substantially straight line and that an observer can see through the barrier layer. In contrast, for an opaque barrier layer, light does not pass through the barrier layer and it is not possible to see through the barrier layer clearly at all. A translucent barrier layer falls between a transparent barrier layer and an opaque barrier layer because light passes through the translucent layer, but some light is scattered, making it impossible for a viewer to see through the layer clearly.

[0066] In one aspect, the airbags or bladders disclosed herein include or consist of a barrier membrane. As used herein, a barrier membrane is understood to be a membrane having a relatively low fluid permeability. When used alone or in combination with other materials in the airbag or bladder, the barrier membrane elastically retains fluid. Depending on the structure and purpose of the airbag or bladder, the barrier membrane can retain fluid at pressures above, equal to, or below atmospheric pressure. In some aspects, the fluid is a liquid or a gas. Examples of gases include air, oxygen (O2), and nitrogen (N2), as well as inert gases. In one aspect, the barrier membrane is a nitrogen-barrier material.

[0067] For membranes with a thickness of approximately 72 micrometers to approximately 320 micrometers, the gas permeability of the barrier membrane, when measured at 23 degrees Celsius and 0% relative humidity, may be less than 4, less than 3, or less than 2 cubic centimeters per square meter per atmosphere per day. In another example, when measured at 23 degrees Celsius and 0% relative humidity, the gas permeability of the barrier membrane for a membrane with a thickness of approximately 72 micrometers to approximately 320 micrometers is approximately 0.1 to approximately 3, or approximately 0.5 to approximately 3, or approximately 0.5 to approximately 3 cubic centimeters per square meter per atmosphere per day. Gas transport rates, such as oxygen or nitrogen transport rates, can be measured using ASTM D1434.

[0068] In one aspect, the barrier film includes a multilayer film comprising a plurality of layers, the plurality of layers including one or more barrier layers, the one or more barrier layers comprising a barrier material comprising or primarily consisting of one or more gas barrier compounds. The multilayer film comprises at least 5 layers or at least 10 layers. Optionally, the multilayer film comprises about 5 to about 200 layers, about 10 to about 100 layers, about 20 to about 80 layers, about 20 to about 50 layers, or about 40 to about 90 layers.

[0069] In one aspect of a multilayer film, the plurality of layers comprises a series of alternating layers, wherein each of the alternating layers comprises two or more barrier layers, each of the two or more barrier layers individually comprising a barrier material, the barrier material comprising or primarily comprising one or more gas barrier compounds. In the series of alternating layers, adjacent layers are each formed based on materials that differ from each other at least chemically in: the presence of various components (e.g., the materials of adjacent layers may differ based on the presence or absence of a gas barrier compound, or based on the type or kind of gas barrier compound present), the concentration of a single component present (e.g., the materials of adjacent layers may differ based on the concentration of a particular type of gas barrier compound present); or they may differ based on the presence of components and their concentrations.

[0070] The plurality of layers of the multilayer film may include a first barrier layer containing a first barrier material and a second barrier layer containing a second barrier material, wherein the first and second barrier materials are different from each other, as described above. The first barrier material may be described as comprising a first gas barrier component consisting of all gas barrier compounds present in the first barrier material, and the second barrier material may be described as comprising a second barrier material component consisting of all gas barrier compounds present in the second barrier material. In a first example, the first barrier component consists only of one or more gas barrier polymers, and the second barrier component consists only of one or more inorganic gas barrier compounds. In a second example, the first barrier component consists of a first one or more gas barrier polymers, and the second component consists of a second one or more gas barrier polymers, wherein the first one or more gas barrier polymers differ from the second one or more gas barrier polymers in polymer species, type, or concentration. In a third example, both the first and second barrier components comprise the same type of gas barrier compounds, but the concentrations of the gas barrier compounds differ, optionally by at least 5% by weight based on the weight of the barrier material. In these multilayer films, the first barrier layer and the second barrier layer may alternate with each other, or may alternate with other barrier layers (e.g., a third barrier layer including a third barrier layer material, a fourth barrier layer including a fourth barrier layer material, etc.), wherein each of the first, second, third and fourth barrier materials, etc., is different from each other as described above.

[0071] Barrier materials (including first barrier materials, second barrier materials, etc.) have low gas permeability. For example, when forming a monolayer membrane that is essentially composed of a barrier material, for a membrane with a thickness of about 72 micrometers to about 320 micrometers, measured at 23 degrees Celsius and 0% relative humidity, and measurable using ASTM D1434, the monolayer membrane has a gas permeability of less than 4 cubic centimeters / square meter / atmosphere / day. The barrier material comprises or is essentially composed of one or more gas-barrier compounds. These one or more gas-barrier compounds may comprise one or more gas-barrier polymers, or may comprise one or more inorganic gas-barrier compounds, or may comprise a combination of at least one gas-barrier polymer and at least one inorganic gas-barrier compound. The combination of at least one gas-barrier polymer and at least one inorganic gas-barrier compound may comprise a blend or mixture, or may comprise a composite material in which fibers, particles, or sheets of the inorganic gas-barrier compound are surrounded by the gas-barrier polymer.

[0072] In one aspect, the barrier material comprises or is substantially composed of one or more inorganic gas-barrier compounds. The one or more inorganic gas-barrier compounds may take the form of fibers, particles, sheets, or combinations thereof. Fibers, particles, and sheets may comprise or are substantially composed of nanoscale fibers, particles, sheets, or combinations thereof. Examples of inorganic barrier compounds include, for example, carbon fibers, glass fibers, glass sheets, silica, silicates, calcium carbonate, clay, mica, talc, carbon black, microparticle graphite, metal sheets, and combinations thereof. The inorganic gas-barrier compound may comprise or be substantially composed of one or more clays. Examples of suitable clays include bentonite, montmorillonite, kaolinite, and mixtures thereof. In one example, the inorganic gas-barrier compound is composed of clay. Optionally, the barrier material may further comprise one or more additional components, such as polymers, processing aids, colorants, or any combination thereof. In the aspect where the barrier material comprises or is substantially composed of one or more inorganic barrier compounds, the barrier material can be described as comprising an inorganic gas-barrier component consisting of all inorganic barrier compounds present in the barrier material. When one or more inorganic gas barrier compounds are included in a barrier material, the total concentration of the inorganic gas barrier components present in the barrier material may be less than 60% by weight, or less than 40% by weight, or less than 20% by weight of the total composition. Alternatively, in other examples, the barrier material is substantially composed of one or more inorganic gas barrier materials.

[0073] In one aspect, the gas-barrier compound comprises or is substantially composed of one or more gas-barrier polymers. The one or more gas-barrier polymers may include thermoplastic polymers. In one example, the barrier material may comprise or is substantially composed of one or more thermoplastic polymers, meaning that the barrier material comprises or is substantially composed of a variety of thermoplastic polymers, including thermoplastic polymers that are not gas-barrier polymers. In another example, the barrier material comprises or is substantially composed of one or more thermoplastic gas-barrier polymers, meaning that all polymers present in the barrier material are thermoplastic gas-barrier polymers. The barrier material can be described as comprising a polymer component consisting of all polymers present in the barrier material. For example, the polymer component of the barrier material may consist of a single type of gas-barrier polymer, such as one or more polyolefins, or may consist of a single type of gas-barrier polymer, such as one or more ethylene-vinyl alcohol copolymers. Optionally, the barrier material may further comprise one or more non-polymer additives, such as one or more fillers, processing aids, colorants, or combinations thereof.

[0074] Many gas barrier polymers are known in the art. Examples of gas barrier polymers include: vinyl polymers such as vinylidene chloride polymers, acrylic polymers such as acrylonitrile polymers, polyamides, epoxy polymers, amine polymers, polyolefins such as polyethylene and polypropylene, copolymers thereof, such as ethylene-vinyl alcohol copolymers, and mixtures thereof. Examples of thermoplastic gas barrier polymers include thermoplastic vinyl homopolymers and copolymers, thermoplastic acrylic homopolymers and copolymers, thermoplastic amine homopolymers and copolymers, thermoplastic polyolefin homopolymers and copolymers, and mixtures thereof. In one example, the one or more gas barrier polymers comprise or are substantially composed of one or more thermoplastic polyethylene copolymers, such as one or more thermoplastic ethylene-vinyl alcohol copolymers. The one or more ethylene-vinyl alcohol copolymers may comprise an ethylene content of about 28 mol% to about 44 mol%, or an ethylene content of about 32 mol% to about 44 mol%. In yet another example, the one or more gas barrier polymers may comprise or are substantially composed of one or more polyethyleneimines, polyacrylic acid, polyethylene oxide, polyacrylamide, polyamide-type amines, or any combination thereof.

[0075] In another embodiment, in addition to the one or more barrier layers (e.g., including a first barrier layer, a second barrier layer, etc.), the multilayer film also includes one or more second layers comprising a second material. In one such configuration of the multilayer film, the one or more barrier layers comprise a plurality of barrier layers alternating with a plurality of second layers. For example, each of the one or more barrier layers may be located between two second layers (e.g., one second layer is located on a first side of the barrier layer, and another second layer is located on a second side of the barrier layer, the second side opposite the first side).

[0076] The second material of the one or more second layers may include one or more polymers. Depending on the type of gas barrier compound used and the intended use of the multilayer membrane, the second material may have a higher gas permeability than the barrier material, meaning that the gas barrier properties of the second material are worse than those of the barrier material. In some aspects, the one or more second layers act as a substrate for the one or more barrier layers and can be used to increase the strength, elasticity, and / or durability of the multilayer membrane. Alternatively or additionally, the one or more second layers can be used to reduce the amount of the required gas barrier material(s), thereby reducing the overall material cost. Even when the second material has a relatively high gas permeability, the presence of the one or more second layers—particularly when the one or more second layers are located between one or more barrier layers—can help maintain the overall barrier performance of the membrane by increasing the distance between cracks in the barrier layers, thereby increasing the distance that gas molecules must travel between cracks in the barrier layers to pass through the multilayer membrane. While small breaks or cracks in the barrier layers of a multilayer membrane may not significantly affect the overall barrier performance of the membrane, using a large number of thinner barrier layers can avoid or reduce visible cracks, fissures, or hazing in the multilayer membrane. The one or more second layers may include, but are not limited to, an adhesive layer that bonds two or more layers together, a structural layer that provides mechanical support for the multilayer film, a bonding layer that provides an adhesive material such as a hot melt adhesive for the multilayer film, and / or a covering layer that provides protection for the outer surface of the multilayer film.

[0077] In some aspects, the second material is an elastomeric material, comprising or consisting primarily of at least one elastomer. Many gas barrier compounds are brittle and / or relatively inflexible, and therefore the one or more barrier layers may easily break when subjected to repeated, excessive stress loads, such as those that may occur during the flexure and release of a multilayer film. Compared to films without an elastomeric second layer, multilayer films comprising one or more barrier layers alternating with a second layer of elastomeric material result in multilayer films that are better able to withstand repeated flexure and release while maintaining their gas barrier properties.

[0078] The second material comprises or is primarily composed of one or more polymers. As used herein, one or more polymers present in the second material are referred to herein as one or more "second polymers" or "second polymers" because these polymers are present in the second material. Reference to "(multiple) second polymers" does not imply that the "first polymer" is present in the second material, or is present as a whole in the multilayer film, although in many respects, there are multiple classes or types of polymers. In one aspect, the second material comprises or is substantially composed of one or more thermoplastic polymers. In another aspect, the second material comprises or is substantially composed of one or more elastic polymers. In yet another aspect, the second material comprises or is substantially composed of one or more thermoplastic elastomers. The second material can be described as comprising a polymeric component consisting of all the polymers present in the second material. In one example, the polymeric component of the second material consists of one or more elastomers. Optionally, the second material may further comprise one or more non-polymeric additives, such as fillers, processing aids, and / or colorants.

[0079] Many polymers suitable for use in the second material are known in the art. Exemplary polymers (e.g., the second polymer) that may be included in the second material include polyolefins, polyamides, polycarbonates, polyimides, polyesters, polyacrylates, polyesters, polyethers, polystyrene, polyureas, and polyurethanes, including their homopolymers and copolymers (e.g., polyolefin homopolymers, polyolefin copolymers, etc.), and combinations thereof. In one example, the second material comprises or is substantially composed of one or more polymers selected from polyolefins, polyamides, polyesters, polystyrene, and polyurethanes, including their homopolymers and copolymers, and combinations thereof. In another example, the polymeric component of the second material comprises one or more thermoplastic polymers, or one or more elastomers, or one or more thermoplastic elastomers, including thermoplastic vulcanizates. Alternatively, one or more second polymers may comprise one or more thermosetting or heat-curable elastomers, such as natural rubber and synthetic rubber, including butadiene rubber, isoprene rubber, silicone rubber, etc.

[0080] Polyolefins are a class of polymers comprising monomer units derived from simple olefins such as ethylene, propylene, and butene. Examples of thermoplastic polyolefins include polyethylene homopolymers, polypropylene homopolymers, polypropylene copolymers (including polyethylene-polypropylene copolymers), polybutene, ethylene-octene copolymers, olefin block copolymers; propylene-butane copolymers and combinations thereof, including blends of polyethylene homopolymers and polypropylene homopolymers. Examples of polyolefin elastomers include polyisobutylene elastomers, poly(α-olefin) elastomers, ethylene-propylene elastomers, ethylene-propylene diene monomer elastomers, and combinations thereof.

[0081] Polyamides are a class of polymers comprising monomer units linked by amide bonds. Natural polyamides include proteins, such as wool and silk, and synthetic amides, such as nylon and aromatic polyamides. The one or more second polymers may include thermoplastic polyamides, such as nylon 6, nylon 6-6, nylon-11, and thermoplastic polyamide copolymers.

[0082] Polyesters are a class of polymers comprising monomeric units derived from ester functional groups, typically formed by the condensation of a diacid such as terephthalic acid with one or more polyols. In one example, the second material may comprise or consist substantially of one or more thermoplastic polyester elastomers. Examples of polyester polymers include homopolymers such as polyethylene terephthalate, polybutylene terephthalate, and poly(1,4-cyclohexyl-dimethylene terephthalate), and copolymers such as polyester polyurethane.

[0083] Styrene polymers are a class of polymers comprising monomer units derived from styrene. One or more second polymers may comprise or consist substantially of styrene homopolymers, styrene random copolymers, styrene block copolymers, or combinations thereof. Examples of styrene polymers include styrene block copolymers, such as acrylonitrile-butadiene-styrene block copolymers, styrene-acrylonitrile block copolymers, styrene-ethylene-butene-styrene block copolymers, styrene-ethylene-butadiene-styrene block copolymers, styrene-ethylene-propylene-styrene block copolymers, styrene-butadiene-styrene block copolymers, and combinations thereof.

[0084] Polyurethanes are a class of polymers comprising monomer units linked by urethane bonds. Polyurethanes are most commonly formed by reacting polyisocyanates (e.g., diisocyanates or triisocyanates) with polyols (e.g., diols or triols), optionally in the presence of chain extenders. Monomer units derived from polyisocyanates are generally referred to as hard segments of polyurethanes, while monomer units derived from polyols are generally referred to as soft segments. Hard segments can be derived from aliphatic polyisocyanates, organic isocyanates, or mixtures of both. Soft segments can be derived from saturated polyols, unsaturated polyols such as polydiene polyols, or mixtures of both. When multilayer films are to be bonded to natural or synthetic rubber, including soft segments derived from one or more polydiene polyols can promote adhesion between the rubber and the film when they come into contact and crosslink, for example, during vulcanization.

[0085] Examples of suitable polyisocyanates that can derive hard segments from polyurethanes include: hexamethylene diisocyanate (HDI), isophorone diisocyanate (IPDI), succinate diisocyanate (BDI), diisocyanate cyclohexylmethane (HMDI), 2,2,4-trimethylhexamethylene diisocyanate (TMDI), diisocyanate methylcyclohexane, diisocyanate methyltricyclodecane, norbornane diisocyanate (NDI), cyclohexane diisocyanate (CHDI), 4,4′-dicyclohexylmethane diisocyanate (H12MDI), diisocyanate decane, lysine diisocyanate, and toluene diisocyanate. The polyurethane comprises or is substantially composed of hard segments derived from toluene diisocyanate (TDI), TDI with trimethylolpropane (TMP), methylene diphenyl diisocyanate (MDI), xylene diisocyanate (XDI), tetramethylxylene diisocyanate (TMXDI), hydrogenated xylene diisocyanate (HXDI), naphthalene 1,5-diisocyanate (NDI), 1,5-tetrahydronaphthalene diisocyanate, p-phenylene diisocyanate (PPDI), 3,3′-dimethyldiphenyl-4,4′-diisocyanate (DDDI), 4,4′-dibenzyl diisocyanate (DBDI), 4-chloro-1,3-phenylene diisocyanate, and any combination thereof. In one aspect, the polyurethane comprises or is substantially composed of hard segments derived from toluene diisocyanate (TDI) or methylene diphenyl diisocyanate (MDI), or both.

[0086] The soft segments of polyurethane can be derived from a variety of polyols, including polyester polyols, polyether polyols, polyester-ether polyols, polycarbonate polyols, polycaprolactone polyethers, and combinations thereof. In one aspect, the polyurethane comprises or is substantially composed of monomer units derived from C4-C12 polyols, or C6-C10 polyols, or C8 or lower polyols, meaning polyols having 4 to 12 carbon molecules, or 6 to 10 carbon molecules, or 8 or fewer carbon molecules in their chemical structure. In another aspect, the polyurethane comprises or is substantially composed of monomer units derived from polyester polyols, polyester-ether polyols, polyether polyols, and any combination thereof. In yet another aspect, the polyurethane comprises or is substantially composed of soft segments derived from polyols or diols having polyester functional units. The soft segments derived from polyols or diols having polyester functional units may account for about 10 to about 50, or about 20 to about 40, or about 30% by weight of the soft segments present in the polyurethane.

[0087] Multilayer films can be produced by various methods, such as co-extrusion, lamination, and layer-by-layer deposition. When one or more barrier layers are co-extruded alone or with one or more second layers, selecting materials with similar processing properties, such as melt temperature and melt flow index (e.g., a first barrier material and a second barrier material, or a single barrier material and a second material), can reduce interlayer shear during extrusion and allow alternating barrier layers and second layers to be co-extruded while maintaining their structural integrity and the desired layer thickness. In one example, the one or more barrier materials and an optional second material (when used) can be extruded into separate individual films, which can then be laminated together to form a multilayer film.

[0088] Multilayer films can be produced using a layer-by-layer deposition process. A substrate optionally containing a second material or barrier material can be constructed into a multilayer film by depositing multiple layers on the substrate. These layers may include one or more barrier layers (e.g., a first barrier layer, a second barrier layer, etc.). Optionally, these layers may include one or more second layers. The one or more barrier layers and / or second layers can be deposited by any method known in the art, such as dipping, spraying, coating, or other methods. One or more barrier layers can be applied using charged solutions or suspensions, such as cationic solutions or suspensions or anionic solutions or suspensions, including charged polymer solutions or suspensions. One or more barrier layers can be applied sequentially using two or more solutions with opposite charges, for example, by applying a cationic solution, then an anionic solution, then another cationic solution, then another anionic solution, and so on.

[0089] The total thickness of the barrier film, including the multilayer film, is about 40 micrometers to about 500 micrometers, or about 50 micrometers to about 400 micrometers, or about 60 micrometers to about 350 micrometers. In one aspect, the thickness of each individual layer of the multiple layers of the multilayer film is about 0.001 micrometers to about 10 micrometers. For example, the thickness of a single barrier layer can be about 0.001 micrometers to about 3 micrometers, or about 0.5 micrometers to about 2 micrometers, or about 0.5 micrometers to about 1 micrometer. The thickness of a single second layer can be about 2 micrometers to about 8 micrometers, or about 2 micrometers to about 4 micrometers.

[0090] In another aspect, the thickness of the membrane and / or its individual layers can be measured by any method known in the art, such as ASTM E252, ASTM D6988, ASTM D8136, or using an optical microscope or an electron microscope.

[0091] In some aspects, including multilayer films, the Shore hardness of barrier films is from about 35A to about 95A, optionally from about 55A to about 90A. In these aspects, the hardness can be measured using Shore A ASTM D2240.

[0092] In one aspect, when a barrier film is formed from multiple alternating barrier layers and a second layer using a co-extrusion process, the barrier material has a melt flow index of about 5 to about 7 g / 10 min at 190°C when using a weight of 2.16 kg, while the second material has a melt flow index of about 20 to about 30 g / 10 min at 190°C when using a weight of 2.16 kg. In another aspect, when measured at 190°C using a weight of 2.16 kg, the melt flow index of the barrier material is about 80% to about 120% of the melt flow index of the barrier material per 10 min. In these aspects, the melt flow index can be measured using ASTM D1238. Alternatively or additionally, the barrier material or the second material, or both, have a melting temperature from about 165°C to about 183°C, or from about 155°C to about 165°C. In one such example, the barrier material has a melting temperature ranging from approximately 165 degrees Celsius to approximately 183 degrees Celsius, while the second material has a melting temperature ranging from approximately 155 degrees Celsius to approximately 165 degrees Celsius. Furthermore, in these aspects, the melting temperature can be measured using ASTM D3418.

[0093] In the illustrated embodiment, the barrier layer 118 includes a first upper barrier layer 118 forming the top side 114 of the sac 106A and a second lower barrier layer 118 forming the bottom side 116 of the sac 106A. In the illustrated example, the internal opposing surfaces (i.e., facing each other) of the barrier layer 118 are joined together at discontinuous locations to form the web region 120 and the peripheral seam 122. The peripheral seam 122 extends around the outer periphery of the sac 106A and defines the outer peripheral contour of the sac 106A. Figure 3 , 4 As shown in 5A, 6A, 7 and 8, the upper and lower barrier layers 118 are spaced apart from each other between the abdominal region 120 and the peripheral seam 122 to define a plurality of chambers 124, which include a plurality of peripheral chambers 126a-126c and a plurality of internal chambers 128a-128b, each chamber forming a corresponding portion of the internal void 130 of the sac 106A.

[0094] For reference Figure 5B and 6B This provides another aspect of the cushioning member 106, wherein the cushioning member 106 is a foam element 106B. In one aspect, the foam element 106B is a solid monolithic piece extending the length, width, and height of the cushioning member 106. In such an aspect, the top side 114 and the bottom side 116 of the foam element 106B define the shape of the foam element 106B. The foam element 106B comprises a foam material containing one or more polymers. Figure 5B and 6BAs shown, the shape of foam element 106B is the same as that of cushioning member 106 shown in all the figures. In other words, foam element 106B may include or be substantially composed of foam material, the shape of which is the same as... Figure 5A and 6A The shape defined by the barrier membrane 118 shown is the same. It should be noted that the foam element 106B may have the same shape as the peripheral chambers 126a-126c and internal chambers 128a, 128b described with respect to the fluid-filled bladder 106A, but does not enclose the space or define internal voids because the foam element 106B is formed as a single piece. When the cushioning member 106 is formed as the foam element 106B, features such as the web region 120 of the fluid-filled bladder 106A are also formed of an elastic polymeric material. The polymeric material can be formed to provide a similar shape to... Figure 5A and 6A The fluid-filled bladder 106A shown has essentially the same cushioning and load-bearing characteristics; however, as mentioned above, the ground reaction force can differ. That is, the ground reaction force is primarily dissipated by the foam element 106B, unlike the distribution throughout the fluid-filled bladder 106A. Thus, the applied load is typically absorbed rather than dispersed or attenuated to other locations of the cushioning member 106.

[0095] Now for reference Figure 5C and 6C This provides another aspect of the cushioning member 106, wherein the cushioning member 106 includes a foam element 106b, which is formed as a solid body of an elastic polymeric material and is housed between barrier layers 118 for encapsulation. The polymeric material and the associated barrier layers 118 can be formed to provide... Figure 5A and 6A The fluid-filled capsule 106A shown has essentially the same cushioning and load-bearing properties; however, the ground reaction force differs due to the foam element 106B disposed therein. Essentially, the combination of the barrier layer 118 and the encapsulated foam element 106B provides a hybrid cushioning element that shares the properties of both the fluid-filled capsule 106A and the foam element 106B. That is, an applied load will (i) cause displacement of the fluid trapped between the barrier layers 118, and (ii) be absorbed by the polymeric material of the foam element 106B. Encapsulating the polymeric material within the barrier layer 118 helps keep the polymeric material of the foam element 106B clean and dry, and helps the foam element 106B maintain its desired shape. Regardless of whether the cushioning member 106 includes the barrier layer 118 and the polymeric material, or simply defines the polymeric material of the cushioning member 106, Figure 6C The thickness T106 of the buffer member 106 shown is the same as... Figure 6A and 6BThe thickness T106 of the buffer member 106 shown is the same. Therefore, the discussion of the details of the buffer member 106 applies to the case where the buffer member 106 is a fluid-filled chamber, and the buffer member 106 is formed entirely of one or more elastic polymeric materials, or is formed of one or more elastic polymeric materials encapsulated within the barrier layer 118.

[0096] The cushioning element 106 may include a plurality of U-shaped or horseshoe-shaped chambers 126a-126c, as shown in U.S. Patent Application Serial No. 17 / 133,732 by Chan et al., the disclosure of which is incorporated herein by reference in its entirety. As discussed in more detail below, portions of these chambers 126a-126c extend along the inner and outer sides 22, 24 of the peripheral region 28. Thus, these chambers 126a-126b may be referred to as peripheral chambers 126a-126c. The peripheral chambers 126a-126c include a heel peripheral chamber 126a, a forefoot peripheral chamber 126b, and a toe peripheral chamber 126c. Generally, the peripheral chambers 126a-126c are arranged sequentially along the longitudinal axis A106 from a first end 110 to a second end 112 of the cushioning element 106. Thus, the chambers 126a-126c are aligned with each other along the length of the cushioning element 106.

[0097] refer to Figure 3-5A One or more of the peripheral chambers 126a-126c may have a variable cross-sectional area from one end to the other. In addition to the peripheral chambers 126a-126c, the buffer 106 also includes one or more internal chambers 128a, 128b disposed in the internal region 26 of the buffer 106. Here, each of the internal chambers 128a, 128b is at least partially surrounded by a corresponding peripheral chamber 126a, 126b. The peripheral chambers 126a-126c and the internal chambers 128a, 128b define an internal void 130. Typically, each of the internal chambers 128a, 128b extends from a first end 132a, 132b of an intermediate segment 134a, 134b connected to an adjacent peripheral chamber 126b, 126c to a terminal second end 136a, 136b adjacent to the rear end 20 of a corresponding peripheral chamber 126a, 126b. The intermediate sections 134a and 134b fluidly connect the inner side 22 of the buffer 106 to the outer side 24 of the buffer 106.

[0098] As shown in the figure, the heel periphery chamber 126a, the forefoot periphery chamber 126b, and the toe periphery chamber 126c include a series of convex angles 138a-138i that are interconnected and arranged along the periphery of the cushioning member 106. The series of convex angles 138a-138i extends in a direction along the longitudinal axis A106 of the cushioning member 106. Each of the convex angles 138a-138i has a variable cross-sectional area, tapering from the midpoint of the respective convex angle 138a-138i towards its end. For example, each of the convex angles 138a-138i includes a first end 140a-140i with a first cross-sectional area, a second end 142a-142i with a second cross-sectional area, and an intermediate portion 144a-144i disposed between the first end 140a-140i and the second end 142a-142i and having a third cross-sectional area larger than the first and second cross-sectional areas. Therefore, each of the convex angles 138a-138i tapers from the middle portion 144a-144i toward the corresponding first end 140a-140i and second end 142a-142i to define a first series of recesses 146a-146h, wherein each recess 146a-146h is disposed between a pair of adjacent convex angles 138a-138i so as to alternate with the series of convex angles 138a-138i along the length of the chamber 126a-126c. In some examples, the width and thickness of each of the convex angles 138a-138i taper from the middle portion 144a-144i.

[0099] In the illustrated example of the cushioning member 106, the plurality of convex angles 138a-138i are arranged sequentially end-to-end along the peripheral region 28, such that the cross-sectional area of ​​the heel peripheral chamber 126a alternates between larger and smaller dimensions. As shown, the series of convex angles 138a-138i includes a first pair of toe convex angles 138a and 138b disposed on the toe peripheral chamber 126c, a pair of forefoot convex angles 138c and 138d disposed on the forefoot peripheral chamber 126b, a pair of midfoot convex angles 138e and 138f disposed at the front end of the heel peripheral chamber 126a in the midfoot region 14, a pair of heel convex angles 138g and 138h disposed in the heel region 16 between the midfoot convex angles 138e and 138f and the second end 112, and a rear convex angle 138i disposed at the second end 112 of the cushioning member 106. The midfoot convex angles 138e and 138f, the heel convex angles 138g and 138h, and the posterior convex angle 138i define a first series of 148 convex angles 138e-138i forming the heel peripheral cavity 126a. The toe convex angles 138a and 138b define a second series of 150 convex angles 138a-138b, wherein the toe convex angles 138a and 138b are spaced apart from each other to define a generally U-shaped recess when viewed along a plane defined by the width and length of the base 108.

[0100] The heel periphery chamber 126a includes an inner middle foot protrusion 138e, 138f located on the inner side 22 of the cushioning member 106 at the front end of the heel region 16, and an outer middle foot protrusion 138f located on the outer side 24 of the cushioning member 106 at the front end of the heel region 16. Each of the inner middle foot protrusion 138e and the outer middle foot protrusion 138f extends from the corresponding first end 140e, 140f along the periphery region 28 to its corresponding second end 142e, 142f.

[0101] Continue to refer to Figure 3 -5, a convex angle 138i is disposed at the second end 112 of the buffer 106, and the middle portion 144i of the convex angle 138i is aligned with the longitudinal axis A106 of the buffer 106. In the example shown, the convex angle 138i extends from the first end 140i on the inner side 22 of the buffer 106 to the second end 142i on the outer side 24 of the buffer 106. As described above, the cross-sectional area of ​​the middle portion 144i is larger than that of each of the first end 140i and the second end 142i.

[0102] The heel protrusions 138g and 138h of the heel periphery chamber 126a include a medial heel protrusion 138g located on the inner side 22 of the pouch 106A and a lateral heel protrusion 138h located on the outer side 24 of the pouch 106A. As shown in the figure, the first ends 140g and 140h of the heel protrusions 138g and 138h are respectively connected to the second ends 142e and 142f of the medial and lateral heel protrusions 138e and 138f. The second end 142g of the medial heel protrusion 138g is connected to the first end 140i of the posterior protrusion 138i. Similarly, the second end 142f of the lateral heel protrusion 138h is connected to the second end 142i of the posterior protrusion 138i. Similar to the midfoot convex angles 138e, 138f and the posterior convex angle 138i, the heel convex angles 138e-138h provide protrusions along the inner and outer sides 22, 24 of the heel peripheral chamber 126a.

[0103] Continue to refer to Figure 3-5A A rear convex angle 138i is disposed at the second end 112 of the bladder 106A, and the intermediate portion 144i of the rear convex angle 138i is aligned with the longitudinal axis A106 of the bladder 106A. In the illustrated example, the rear convex angle 138i extends from a first end 140i on the inner side 22 of the buffer 106 to a second end 142i on the outer side 24 of the buffer 106. As described above, the intermediate portion 1441 has a larger cross-sectional area than each of the ends 1401 and 1421.

[0104] The heel protrusions 138g and 138h of the heel periphery chamber 126a include an inner heel protrusion 138g disposed on the inner side 22 of the cushioning member 106 and an outer heel protrusion 138h disposed on the outer side 24 of the cushioning member 106. As shown in the figure, the first ends 140g and 140h of the heel protrusions 138g and 138h are respectively connected to the second ends 142e and 142f of the inner and outer middle heel protrusions 138e and 138f. The second end 142g of the inner heel protrusion 138g is connected to the first end 140i of the rear protrusion 138i. Similarly, the second end 142h of the outer heel protrusion 138h is connected to the second end 142i of the rear protrusion 138i. Similar to the midfoot convex angles 138e, 138f and the heel convex angle 138i, the heel convex angles 138g, 138h provide protrusions along the inner and outer sides 22, 24 of the cushion 106 for the heel peripheral chamber 126a.

[0105] The intermediate segments 134a and 134b extend across the width of the buffer 106. Intermediate segment 134b is adjacent to the midfoot region 14 and connects a pair of forefoot protrusions 138c and 138d to each other. As shown, intermediate segment 134b extends along an arcuate path from the inner side 22 to the outer side 24. Intermediate segment 134a separates the toe portion 12T from the midfoot region 14 and connects the second ends 142a and 142b of a pair of toe protrusions 138a and 138b to each other. As shown, intermediate segment 134a extends along an arcuate path from the inner side 22 to the outer side 24, thereby facilitating the formation of a U-shaped recess between the pair of toe protrusions 138a and 138b.

[0106] Still referencing Figure 3-5B The forefoot periphery chamber 126b includes a pair of forefoot protrusions 138c and 138d, which extend through the ball portion 12B of the forefoot region 12 and are located between the heel periphery chamber 126a and the toe periphery chamber 126c. Specifically, the forefoot protrusions 138c and 138d include a medial forefoot protrusion 138c and a lateral forefoot protrusion 138d. A first recess 146a is formed at the position where the second end 142a of the medial toe protrusion 138a meets the first end 140c of the medial forefoot protrusion 138c. Similarly, a second recess 146b is formed at the position where the second end 142b of the lateral toe protrusion 138b meets the first end 140d of the lateral forefoot protrusion 138d. A third recess 146c is formed at the position where the second end 142c of the medial forefoot protrusion 138c meets the first end 140e of the medial midfoot protrusion 138e. Similarly, the fourth recess 146d is formed at the position where the second end 142d of the outer front leg convex angle 138d and the first end 140f of the outer middle leg convex angle 138f meet.

[0107] In some examples, one or both of the front foot convex angles 138c and 138d of the front foot peripheral chamber 126b may be spherical, so that the dimensions (e.g., cross-section, width, thickness) of the intermediate portions 144c and 144d are larger than those of the first ends 140c and 140d and the second ends 142c and 142d. For example, in the illustrated configuration, the width of each of the first ends 140c and 140d and the second ends 142c and 142d increases from the corresponding intermediate portion 144c and 144d, such that the first ends 140c and 140d and the second ends 142c and 142d converge inward toward the longitudinal axis A106 of the buffer 106. (Continue to refer to...) Figure 3 -5. One or two toe protrusions 138a, 138b of the peripheral chamber 126c of the toe can be spherical, thereby the dimensions (e.g., cross-section, width, thickness) of the middle portion 144a, 144b are greater than the first end 140a, 140b and the second end 142a, 142b.

[0108] Unlike the heel periphery chamber 126a and forefoot periphery chamber 126b, which are fully attached to the sternum region 120, the toe periphery chamber 126c may only be partially attached to the sternum region 120. For example, the toe protrusions 138a and 138b of the toe periphery chamber 126c may protrude beyond the sternum region 120, such that the distal end of each of the toe protrusions 138a and 138b hangs freely. Thus, each of the toe protrusions 138a and 138b can move independently of the other. In another configuration, the toe protrusions 138a and 138b of the toe periphery chamber 126c may be formed into a generally circular shape (not shown).

[0109] like Figure 5A and 5B As shown, the forefoot internal chamber 128a extends along the longitudinal axis A106 from a first end 132a of the intermediate segment 134a connected to the toe peripheral chamber 126c to a second end 136a adjacent to the terminal end of the intermediate segment 134b of the forefoot peripheral chamber 126b. As shown, the outer periphery of the forefoot internal chamber 128a is offset inwardly by a substantially constant distance from the inner periphery of the forefoot peripheral chamber 126b. In the illustrated example, the forefoot internal chamber 128a includes a necked portion 152 adjacent to the first end 132a, which extends between the recesses 146a, 146b of the forefoot peripheral chamber 126b. The second end 136a of the forefoot internal chamber 128a may also be spherical and externally connected to the forefoot protrusions 138c, 138d of the forefoot peripheral chamber 126b.

[0110] The heel cavity 128b extends along the longitudinal axis A106 from its first end 132b, which is connected to the intermediate segment 134b of the forefoot periphery cavity 126b, to its second end 136b, which is adjacent to the terminal end of the convex angle 138i of the heel periphery cavity 126a. The outer periphery of the heel cavity 128b is offset inward from the inner periphery of the heel periphery cavity 126a by a substantially constant distance. Thus, the width of the heel cavity 128b can increase along the direction from the first end 132b to the second end 136b.

[0111] Internal chambers 128a and 128b are attached to corresponding peripheral chambers 126a and 126b via a ventral region 120, such that each internal chamber 128a and 128b is surrounded by a portion of the ventral region 120. Therefore, the ventral region 120 includes a generally U-shaped first portion 154a surrounding the heel internal chamber 128a and a generally U-shaped second portion 154b surrounding the forefoot internal chamber 128b, as shown. The first U-shaped portion 154a of the ventral region 120 extends between and attaches to the outer periphery of the heel internal chamber 128a and the inner periphery of the heel peripheral chamber 126a. Similarly, the second U-shaped portion 154b extends between and attaches to the outer periphery of the foreleg internal chamber 128b and the inner periphery of the foreleg peripheral chamber 126b. As shown, regarding the aforementioned portion of the web region 120, the term "U-shaped" is not strictly limited to a shape having two straight legs connected by a constant curvature, but refers to any shape that extends from the first end along a generally first direction line, then folds back and extends along the first direction line to a second end adjacent to or facing the first end. Therefore, the U-shaped portion of the web region can also be described, for example, as horseshoe-shaped, bell-shaped, or hairpin-shaped.

[0112] Adjacent chambers in cavities 126a-126c and 128a-128b are separated from each other by a portion of the web region 120, such that recesses or spaces 156a-156c and 158a-158c are formed between adjacent chambers in cavities 126a-126c and 128a-128b on opposite sides 114 and 116 of the buffer 106, as shown. Figure 6A-8 As best shown in the diagram. In other words, the buffer 106 includes a series of upper recesses 156a-158c formed by the ventral region 120 and adjacent chambers 126a-126c, 128a-128b on the top side 114 of the buffer 106, and a series of lower recesses 158a-160c formed by the ventral region 120 and adjacent chambers 126a-126c, 128a-128b on the bottom side 116 of the sac 106. Figures 5A-5CAs shown in Figure 10, the corresponding recesses or spaces 158a, 158b of the first portion 154a and the second portion 154b of the web region 120 may open outward from each other at their distal ends. For example, the distal ends of the first portion 154a located near the intermediate segment 134b may extend in directions away from each other, such that the distal ends are divergent. Thus, one of the distal ends of the first portion 154a may extend in a direction toward the inner side 22, while the other distal end of the first portion 154a may extend in a direction toward the outer side 24. Similarly, the distal ends of the second portion 145b are divergent in the region near the intermediate segment 134a.

[0113] Continue to refer to Figure 5A and 5B The first ends 140a-140i and second ends 142a-142i of the series of convex angles 138a-138i, and the first ends 132a and 132b of the internal chambers 128a and 128b form a plurality of conduits, which fluidly connect adjacent peripheral chambers 126a-126c to each other. Therefore, portions of the internal voids 130 formed by each of the peripheral chambers 126a-126c and the internal chambers 128a and 128b are in fluid communication with each other, allowing fluid to transfer between the peripheral chambers 126a-126c.

[0114] Continue to refer to Figure 2A and 2B The base 108 is configured to mate with the cushioning member 106 to provide an integral sole interlayer 102. The base 108 extends from a first end 160 at the front end 18 of the sole structure 100 to a second end 162 at the rear end 20 of the sole structure 100. The base 108 also includes a top surface 164 defining a portion of the footbed, and a bottom surface 166 formed on the side of the base 108 opposite to the top surface 164 and configured to mate with the top side 114 of the cushioning member 106.

[0115] The base 108 may be formed as a single piece or may be formed from multiple elements, as discussed in more detail below. The base 108 includes a series of support members 168a-168g extending along the length of the base 108. Specifically, a plurality of inner support members 168a, 168c, 168e, and 168g extend along the inner side 22 of the base 108, a plurality of outer support members 168b, 168d, 168f, and 168h extend along the outer side 24 of the base 108, and a rear support member 168i is disposed at the rear end 20 of the base 108. The rear support member 168i is disposed between the series of outer support members 168a, 168c, and 168e and the series of inner support members 168b, 168d, and 168f. The series of support members 168a-168i alternates with a series of recesses 170a-170f, which also extend along the length of the base 108. Specifically, the inner recesses 170a, 170c and 170e of the second series of recesses 170a-170f extend along the inner side 22 of the base 108, and the outer recesses 170b, 170d and 170f of the second series of recesses 170a-170f extend along the outer side 24 of the base 108.

[0116] The outer middle leg recess 170c and the inner middle leg recess 170d cooperate to define the width of the continuous middle leg recess 172 of the extended base 108. Figure 11 Similarly, the outer front foot recess 170a and the inner front foot recess 170b cooperate to define a continuous front foot recess 174 that extends the width of the base 108. Figure 11 The base 108 may also include a pair of internal supports 176a, 176b disposed in the forefoot region 12. Each internal support 176a, 176b is schematically shown as having a generally triangular cross-section taken along the width of the internal support 176a, 176b. The forefoot internal support 176a is formed on the bottom surface 166 of the base 108 and disposed in a continuous forefoot recess 174, thereby being disposed between the outer forefoot recess 170a and the inner forefoot recess 170b. The toe internal support 176b is disposed at the front end 18 of the base 108. The bottom surface 166 of the forefoot internal support 176a is generally concave so as to be configured to engage the top surface of the intermediate segment 134a of the buffer 106. Similarly, the bottom surface 166 of the toe internal support 176b is also generally concave so as to be configured to engage the top surface of the intermediate segment 134b of the buffer 106.

[0117] Series of support members 168a-168i are aligned and in contact with series of convex corners 138a-138i. Thus, the distal end of each of the support members 168a-168i is entirely recessed to receive the top surface of the corresponding one of the convex corners 138a-138i. Support members 168c-168i define a first series of 178 support members, which are configured to align and contact with a first series of 148 convex corners 138e-138i. Support members 168a-168b define a second series of 180 support members, which are configured to align with a second series of 150 convex corners provided in the toe portion 12T of the forefoot region 12.

[0118] In an aspect where the base 108 is formed of multiple elements, the base 108 may include a buffer 182, a plate 184, and an insert 186, the insert 186 comprising an insert material containing one or more polymers. In such an aspect, a first series 178 support members 168c-168i are formed by assembling the plate 184 onto the buffer 182, and a second series 180 support members 168a-168b are formed solely from the plate 184. In such an aspect, when assembled together, portions of the plate 184 and the buffer 182 together form the first series 178 support members 168c-168i and cooperate to engage the top surfaces of the corresponding first series 148 convex corners 138a-138i.

[0119] Continue to refer to Figure 2A and 2BThe base 108 may be configured to support the periphery of a user's foot. In this respect, the base 108 may further include upper portions 188a-188i disposed on at least one of a series of supports 168a-168i. The upper portions 188a-188h are disposed along the periphery of the base 108 and are curved along the width and height of the base 108 to conform to the shape of the bottom of the foot. The upper portions 188a-188i include a series of inner upper portions 188a, 188c, 188e, 188g and a series of outer upper portions 188b, 188d, 188f, 188h extending along the periphery of the respective inner and outer sides 24 of the base 108. The upper rear portion 188i is disposed on the rear end 20 of the base 108, and a series of inner upper portions 188a, 188c, 188e, 188g and a series of upper outer portions 188b, 188d, 188f, 188h are arranged sequentially from opposite ends of the upper rear portion 188i. The upper rear portion 188i forms a cup-shaped body to help support the rear of the heel. The heights of the upper portions 188a-188i can be the same or different. In the case where the base 108 is formed as a single piece, the upper portions 188a-188h are adjacent to a series of support members 168a-168i. In the case where the base 108 is formed by multiple elements, such as a buffer member 182, a plate 184, and an insert 186, the upper portions 188a-188h may be defined by the plate 184.

[0120] As described above, the first support member of series 178 may be composed of a buffer support member 182 and a plate 184. The plate 184 also includes an inner support arm 190 and an outer support arm 192 extending from the end of the upper rear portion 1821. The distal ends of each of the inner support arm 190 and the outer support arm 192 are spaced apart from each other to define an insertion foot recess 194. The inner support arm 190 includes a series of inner flanges 196a-196d, which are spaced apart from each other to form a series of inwardly recessed recesses 198a-198c alternating with the respective inner flanges 196a-196d. Each inner flange 196a-196d is disposed on the inner surface of the inner support arm 190 and extends toward the center of the plate 184, thereby being substantially orthogonal to the upper portion 188. The outer support arm 192 includes a series of inner outer flanges 200a-200d. The inner and outer flanges 200a-200d are spaced apart from each other, thus forming a series of inward and outward recesses 202a-202d alternating with the corresponding inner and outer flanges 200a-200c. The inner and outer flanges 200a-200d are disposed on the inner surface of the outer support arm 192 and extend toward the center of the plate 184. The insert recess 194 has a shape defined by the inner flanges 196a-196d, the inward and outward recesses 198a-198c, the inner and outer flanges 200a-200d, and the inward and outward recesses 200a-200c, so as to... Figure 9 The insert 186 is properly accommodated as shown.

[0121] Continue to refer to Figure 2A and 2B The insert 186 has a peripheral edge configured to lie between the inner support arm 190 and the outer support arm 192 of the plate 184 for mounting within the insert recess 194. The insert 186 is a single body having a series of wings 204a-204g extending along the periphery of the inner side 22 and the outer side 24 of the insert 186. The wings 204a-204g are spaced apart to define the peripheral edge configured to be placed within the insert recess 194. A rear wing 204h is disposed on the second end 112 of the base 108 and configured to abut against a portion of the upper rear portion 182i of the plate 184. The plate 184 is mounted to the top surface of the cushioning member 182 for placement between the shoe upper 300 and the cushioning member 182. The plate 184 is longer than the cushioning member 182, and outer and inner supports 168a, 168b are formed on the bottom surface of the plate 184.

[0122] A toe cap 206 is disposed on a first end 110 of a base 108. The toe cap 206 may include an insert material, or may include a toe material comprising one or more polymers, wherein the toe material differs from the insert material described above. The toe cap 206 is configured to protect the user's toes. In one aspect, the toe cap 206 is formed as a single piece and can be adhered to the insert 186 using any known or later-developed attachment techniques, including adhesives, stitching, etc. The toe cap 206 is a generally arcuate member extending upward from the body of the insert 186.

[0123] The base 108 includes ridges 208a-208c, which are configured to be placed in one of the upper recesses 156a-156c of the buffer member 106 when the base 108 is assembled to the buffer member 106. The front ridge 208a has a generally C-shaped structure and is configured to receive the internal cavity 128b. The intermediate ridge 208b and the rear ridge 208c together form a generally U-shaped dimension to define longitudinally extending recesses 210a-208c between the elongated portions of the intermediate ridge 208b and the rear ridge 208c. The recesses 210a-210c are configured to receive the heel internal cavity 128b. In the illustrated example, ridges 208a-208c can be configured to extend fully into the ventral region 120 of the upper recesses 156a-156c in some areas and be spaced apart from the ventral region 120 of the upper recesses 156a-156c in other areas when the sole interlayer 102 is assembled. Thus, portions defining the underside 116 of ridges 208a-208c can contact the ventral region 120 at selected locations. In other examples, one or more of ridges 208a-208c can be configured such that their distal ends are spaced apart from the ventral region 120, or can be omitted from the base.

[0124] For reference Figure 9 and Figure 10 This provides one aspect of a base 108, which comprises a cushioning element 182, a plate 184, and an insert 186. The cushioning element 182, plate 184, and insert 186 can be fastened to each other using any technique such as adhesives, welding, etc., to form a single unit. Alternatively, the cushioning element 182, plate 184, and insert 186 can be simply mounted to each other and held in place by attachment to the outsole 104 and the upper 300.

[0125] Now for reference Figure 11The base 108 and outsole 104 shown are assembled to the cushioning member 106. Ridges 208a-206c are shown as contact areas 120 with the ventral plate. Plate 184 is longer than the cushioning member 182, with the toe 206 extending beyond the rear end of the cushioning member 182. The outsole 104 is mounted to the bottom surface of the cushioning member 106 to protect the cushioning member 106 during contact with the ground. Ridges 208a-208c have an arcuate bottom surface 166 configured to engage the top surfaces of the corresponding internal chambers 128a, 128b. An internal support 176a is placed against the top surface of the forefoot internal chamber 128a, and an internal support 176b is placed against the top surface of the heel internal chamber 128b. A midfoot continuous recess 172 and a forefoot continuous recess 174 extend across the width of the base 108. The continuous recess 172 in the middle foot and the continuous recess 174 in the forefoot are positioned to facilitate the bending of the outsole 104.

[0126] For reference Figure 12 Provided along Figure 10 Cross-sectional view taken at centerline 12-12. Figure 12 The engagement of the toe convex angles 138a and 138b with the base 108 is shown. In this respect, the second series 180 support members 168a-168b are formed entirely of plate 184. Plate 184 and insert 186 are assembled together to form a single unit. The top surface of plate 184 abuts against and is substantially seamless with the top surface of insert 186 to define the profile of the footbed. Cushion 182 does not extend to the toe convex angles 138a and 138b. A gap 212 is formed between the pair of toe convex angles 138a and 138b. The gap 212 allows the toe convex angles 138a and 138b to bend freely relative to convex angles 138c-138i, which are connected at the corresponding first ends 140a-140i and second ends 142a-142i.

[0127] For reference Figure 13 Provided along Figure 10 A cross-sectional view taken along centerline 13-13. The base 108 rests completely against the top surface of the buffer 106. The inner support 168c and outer support 168d engage with a pair of front foot convex angles 138c, 138d. The inner support 168c is formed by an assembly of a buffer 182 and a plate 184, wherein the buffer 182 defines the inner portion of the inner support 168c, and the plate 184 defines the outer portion of the inner support 168c. Similarly, the buffer 182 defines the inner portion of the outer support 168d, and the plate 184 defines the outer portion of the outer support 168d. The anterior ridge 208a rests against the ventral region 120 defining the upper recess 156b. The region of the buffer 182 between the inner side 22 and the outer side 24 of the anterior ridge 208a is arcuate to rest against the top surface of the front foot internal cavity 128a.

[0128] For reference Figure 14 Provided along Figure 10 A cross-sectional view taken along centerline 14-14. The inner support 168e and outer support 168f are aligned and in contact with the top surface of a corresponding one of a pair of center leg protrusions 138e, 138f. The inner support 168e and outer support 168f are sized to fully abut against the corresponding center leg protrusions 138e, 138f. The inner support 168e is formed by an assembly of a buffer 182 and a plate 184, wherein the buffer 182 defines the inner portion of the inner support 168e, and the plate 184 defines the outer portion of the inner support 168e. Similarly, the buffer 182 defines the inner portion of the outer support 168f, and the plate 184 defines the outer portion of the outer support 168f. The region of the buffer 182 between the inner side 22 and the outer side 24 of the intermediate ridge 208b is arc-shaped to abut against the top surface of the inner chamber 128a. Figure 14 An aspect in which the bottom surface of the intermediate ridge 208b is separated from the web region 120 is shown.

[0129] For reference Figure 15 Provided along Figure 10 The cross-sectional view is taken along line 15-15. This cross-sectional view is taken along the recesses 146e, 146f and 170e, 170f of the buffer 106, which are formed in the front leg continuous recess 174 formed on the base 108. Therefore, the base 108 is spaced apart from the buffer 106 to increase the flexibility around line 15-15.

[0130] For reference Figure 16 Provided along Figure 10 A cross-sectional view taken along line 16-16. The inner support 168g and the outer support 168h are aligned and in contact with the top surface of a corresponding one of the pair of heel protrusions 138g, 138h. The dimensions of the inner support 168g and the outer support 168h are designed to fully abut against the corresponding heel protrusions 138g, 138h. The outer support 168h is formed by an assembly of a cushion 182 and a plate 184, wherein the cushion 182 defines the inner portion of the outer support 168h and the plate 184 defines the outer portion of the outer support 168h. Similarly, the cushion 182 defines the inner portion of the inner support 168g, and the plate 184 defines the outer portion of the inner support 168g. The posterior ridge 208c is placed within the upper recess 156a. The area of ​​the buffer 182 between the inner side 22 and the outer side 24 of the posterior spine 208c is arc-shaped so as to be placed against the top surface of the internal heel cavity 128b. Figure 16 One aspect is shown in which the bottom surface of the posterior ridge 208c is separated from the web region 120.

[0131] Components 182, 184, and 186 of the base 108 may include a base material containing one or more polymers (such as foam or rubber) to impart cushioning, responsiveness, and energy distribution properties to the wearer's foot. In the illustrated example, cushioning 182 includes a first foam material, plate 184 includes a second foam material, and insert 186 includes a third foam material; they are substantially the same or differ from each other in one or more of the appearance, physical properties, and composition described above. For example, the cushioning material and plate material may provide greater cushioning and impact distribution than the insert material, while the insert material may have greater stiffness than the cushioning material and / or plate material to provide increased lateral stiffness to the peripheral area 28 of the upper 300.

[0132] Refer again Figure 2B and Figure 11-16 On one side of plate 184, each of the series of supports 168a-168g extends outward and downward from the periphery of plate 184, and upper portions 188a-188i extend upward and outward from the periphery of plate 184. Each of the series of supports 168a-168g is aligned with a corresponding upper portion 188c-188i to define a generally V-shaped cross-section. The series of supports 168a-168g and the corresponding upper portions 188c-188i cooperate to provide compressive and reaction forces in response to loads. As an example, the series of supports 168a-168g and the corresponding upper portions 188c-188i act as springs in response to compressive loads.

[0133] The base material contains one or more polymers. Example base materials include foam or solid materials, including molded foam and molded solid materials.

[0134] The various materials described herein (e.g., outsole materials, cushioning materials, base materials, etc.) comprise one or more polymers, or are substantially composed of one or more polymers. One or more polymers may include one or more thermoplastic polymers, one or more thermosetting or heat-curable polymers (i.e., polymers capable of crosslinking but not yet crosslinked), or one or more thermosetting polymers. One or more polymers may include one or more elastomers, including thermoplastic elastomers (TPEs) or thermosetting elastomers, or both. One or more polymers may include aliphatic polymers, aromatic polymers, or mixtures thereof; or may include homopolymers, copolymers (including terpolymers), or mixtures thereof.

[0135] In some aspects, the one or more polymers may include olefin homopolymers, olefin copolymers, or blends thereof. Examples of olefin polymers include polyethylene, polypropylene, and combinations thereof. In other aspects, the one or more polymers may include one or more ethylene copolymers, such as ethylene-vinyl acetate (EVA) copolymers, EVOH copolymers, ethylene-ethyl acrylate copolymers, ethylene-unsaturated monofatty acid copolymers, and combinations thereof.

[0136] In another aspect, the one or more polymers may include one or more polyacrylates, such as polyacrylic acid, esters of polyacrylic acid, polyacrylonitrile, polyacrylate, polymethyl acrylate, ethyl acrylate, butyl acrylate, polymethyl methacrylate, and polyvinyl acetate; including derivatives thereof, copolymers thereof, and any combination thereof.

[0137] In another aspect, one or more polymers may include one or more ionomer polymers. In these aspects, ionomer polymers may include polymers having carboxylic acid functional groups, sulfonic acid functional groups, their salts (e.g., sodium, magnesium, potassium, etc.), and / or their anhydrides. For example, one or more ionomer polymers may include one or more fatty acid-modified ionomer polymers, polystyrene sulfonates, ethylene-methacrylic acid copolymers, and combinations thereof.

[0138] In other respects, one or more polymers may include one or more styrene block copolymers, such as acrylonitrile butadiene styrene block copolymers, styrene acrylonitrile block copolymers, styrene ethylene butene styrene block copolymers, styrene ethylene butadiene styrene block copolymers, styrene ethylene propylene propylene styrene block copolymers, styrene butadiene styrene block copolymers, and combinations thereof.

[0139] In other respects, one or more polymers may include one or more polyamide copolymers (e.g., polyamide-polyether copolymers) and / or one or more polyurethanes (e.g., crosslinked polyurethanes and / or thermoplastic polyurethanes). Examples of suitable polyurethanes include those discussed above with respect to barrier layer 118. Alternatively, one or more polymers may include one or more natural and / or synthetic rubbers, such as polybutadiene and polyisoprene.

[0140] When the material is a foam, it can be foamed using a physical blowing agent that transforms into a gas based on temperature and / or pressure changes, or a chemical blowing agent that forms a gas when heated above its activation temperature. For example, a chemical blowing agent can be an azo compound, such as hexamethylenetetramine, sodium bicarbonate, and / or isocyanate.

[0141] In some constructions, the foam polymer material may be a cross-linked foam material. In these constructions, peroxide-based cross-linking agents, such as dicumyl peroxide, may be used. Furthermore, the foam polymer material may include one or more fillers, such as pigments, modified or natural clay, modified or unmodified synthetic clay, talc glass fiber, powdered glass, modified or natural silica, calcium carbonate, mica, paper, wood chips, and the like.

[0142] The material can be formed using molding processes. In one instance, when the material comprises a molded elastomer, the uncured material (e.g., uncured rubber) can be mixed in a Banbury mixer with optional fillers and curing packs (such as sulfur-based or peroxide-based curing packs), calendered, molded, placed in a die, and vulcanized.

[0143] In another example, when the material is a foam, it can be foamed during a molding process such as injection molding. Thermoplastic polymer material can be melted in the barrel of an injection molding system and mixed with a physical or chemical foaming agent and optionally a crosslinking agent, then injected into a mold under conditions where the foaming agent is activated, thereby forming molded foam.

[0144] Optionally, when the material is a foam material, the foam material may be a compression-molded foam. Compression molding can be used to change the physical properties of the foam (e.g., density, stiffness, and / or hardness), or to change the physical appearance of the foam (e.g., fusing two or more foam pieces to form a foam, etc.), or both.

[0145] Compression molding supply is intended to begin by forming one or more foam preforms, for example, by injection molding and foaming the material, by foaming the material to form foam particles or beads, by cutting foam sheet raw materials, etc. Compression-molded foam can then be manufactured by placing one or more foam preforms in a compression mold and applying sufficient pressure to the preforms to compress them within a closed mold. Once the mold is closed, sufficient heat and / or pressure are applied to the preforms within the closed mold for a sufficient time to modify the preform(s) by forming a skin on the outer surface of the compression-molded foam, fusing individual foam particles together, increasing the density of the foam retained in the finished product, or any combination thereof. After heating and / or applying pressure, the mold is opened and the molded foam article is removed from the mold.

[0146] In some examples, the outsole 104 extends over the midsole 102 to provide increased durability and elasticity. In the illustrated example, the outsole 104 is provided as an outsole material that is overmolded onto the underside 116 of the cushioning member 106 to increase the durability of the exposed portion of the lower barrier layer 118 of the cushioning member 106. Therefore, the outsole material differs from the cushioning material described above. For example, the outsole material may differ from the cushioning material, including from the lower barrier membrane, based on at least one of different thicknesses, different hardnesses, and different abrasion resistances. In some examples, the outsole 104 may be integrally formed with the lower barrier layer 118 of the cushioning member 106 using an overmolding process. In other examples, the outsole 104 may be formed separately from the lower barrier layer 118 of the cushioning member 106 and may be adhesively bonded to the lower barrier layer 118.

[0147] Refer again Figure 2A , 2B In sections 10-16, the outsole 104 includes a ground-joining surface 30a and a midsole-joining surface 30b opposite to the ground-joining surface 30a. The outsole 104 includes a first outsole portion 214, a second outsole portion 216, and a third outsole portion 218. The first outsole portion 214, the second outsole portion 216, and the third outsole portion 218 are spaced apart from each other, allowing for greater flexibility in the sole structure compared to conventional outsole structures that utilize outsoles formed as a single piece. Specifically, the peripheral edges of each of the first outsole portion 214, the second outsole portion 216, and the third outsole portion 218 are spaced apart from each other to allow different components of the cushioning member 106 to move relative to each other. Furthermore, as the plurality of chambers 124 are compressed under load due to running, walking, or jumping movements, the lower portions of the respective chambers 104 are allowed to open (i.e., move outward as the chamber 104 deforms). In other words, when the first outsole portion 214, the second outsole portion 216, and the third outsole portion 218 are spaced apart from each other, the chamber 104 is allowed to deform more freely in response to the applied load.

[0148] The outsole 104 is composed of a first material 220 and a second material 222. The second material 222 is more durable than the first material 220 and can be formed of a highly abrasion-resistant rubber. Preferably, the second material 222 is disposed in a region of the outsole 104 in which the foot portion engages with the ground with greater force relative to the rest of the foot. As shown, the second material 222 is disposed along the rear end 20 in the heel region 16 and in the ball portion 12B and toe portion 12T of the forefoot region 12, which corresponds to the region where it is easier to engage with the ground.

[0149] The first outsole portion 214 includes a heel portion 224, a first medial leg portion 226, and a first lateral leg portion 228. The heel portion 224 is generally arc-shaped along its length, forming a "C" shape. The first medial leg portion 226 and the first lateral leg portion 228 extend along their respective longitudinal axes in a direction toward the front end of the sole structure 100, the longitudinal axes being substantially parallel to the longitudinal axis of the sole structure 100. Thus, the first medial leg portion 226 and the first lateral leg portion 228 extend from opposite ends of the heel portion 224 to define a generally U-shaped structure. The heel portion 224 is configured to be positioned along the rear end 20 of the foot to support the rear end of the foot. See details. Figure 2A and 11 When viewed along the width of the heel portion 224, the heel portion 224 is generally C-shaped. The heel portion 224 has a bottom side 116 that is configured to accommodate the rear convex angle 138i of the cushioning member 106. The heel portion 224 tapers from its center toward the corresponding end of the heel portion 224 to accommodate the spherical shape of the rear convex angle 1381.

[0150] The first inner leg portion 226 and the first outer leg portion 228 each include at least one pair of elongated recesses 230a-230d. When viewed along the width of the respective first inner leg portion 226 and first outer leg portion 228, each recess 230a-230d has a C-shaped cross-section, such as... Figure 2A and 14 As shown in -16. Similar to the heel portion 224, each recess 230a-230d tapers from the center of the corresponding recess 230a-230d toward each end of the corresponding recess 230a-230d to accommodate the shape of the bottom side 116 of the corresponding convex angle 138e-138h of the cushion 106.

[0151] like Figure 2B , 10As shown in 11 and 14-16, the first outsole portion 214 is formed of a first material 220 and a second material 222. In one aspect, the first outsole portion 214 includes a seat portion 232a configured to receive the second material 222. In particular, the first outsole portion 214 may include a heel insert 234a formed of the second material 222. The heel insert 234a is schematically shown as generally bean-shaped. The base portion 232d is preferably shaped similarly to the heel insert 234a, wherein the base portion 232d is a recess with a depth substantially the same as the height of the heel insert 234a, and the periphery of the base portion 232d is substantially the same as the periphery of the heel insert 234a, so as to suitably receive the heel insert 234a and form a generally continuous surface with different durability. The first inner leg portion 226 and the first outer leg portion 228 may be formed entirely of the first material 220. In one respect, the first material 220 is not only less durable than the second material 222, but also more flexible.

[0152] The first outsole portion 214 may include a variable width measured in a direction extending between the inner side 22 and the outer side 24 of the sole structure 100 to accommodate the convex angles 138e-138i and the recesses 146e-146h of the cushioning member 106, such as Figure 10 As shown. Specifically, due to the shape of the cushioning member 106 to which the first outsole portion 214 is attached, the widths of the first medial leg portion 226 and the first lateral leg portion 228 at the convex angles 138e-138i can be greater than their widths at the recesses 146e-146h. Providing variable widths for the first medial leg portion 226 and the first lateral leg portion 228 results in the first medial leg portion 226 and the first lateral leg portion 228 alternating between wider and narrower regions along the inner side 22 and the outer side of the sole structure 100, extending substantially parallel to the longitudinal axis A106 of the cushioning member 106. In one configuration, the first medial leg portion 226 and the first lateral leg portion 228 each include their maximum width at the inner side 22 and outer side 24 near the rear end 20 of the sole structure 100 and adjacent to the junction of the heel portion 224 with the corresponding first medial leg portion 226 and first lateral leg portion 228.

[0153] The wider and narrower regions of the first inner leg portion 226 and the first outer leg portion 228 provide a wavy shape for the first outsole portion 214, extending from the inner side 22 to the outer side 24 and along the rear end 20. Specifically, the first outsole portion 214 alternates between wider portions (i.e., 230a, 230b, 230c, 230d, 234a) and narrower portions (i.e., 230a, 230b, 230c, 230d, 234a) disposed between adjacent wider portions. Therefore, when the first outsole portion 214 is viewed from the bottom of the sole structure 100, the first outsole portion 214 has a wavy shape extending from one end of the inner side 22 along the rear end 20 to a second end of the outer side 24, as shown in the image. Figure 10 As shown.

[0154] Both the first medial leg portion 226 and the first lateral leg portion 228 may include a distal end that is (i) arc-shaped, (ii) opposite to the second outsole portion 216, and (iii) spaced apart from the second outsole portion 216. The distal ends of the first medial leg portion 226 and the first lateral leg portion 228 may be located in the forefoot region 12 or the midfoot region 14, such that the first outsole portion 214 extends continuously from the heel region 16 to the midfoot region 14 or the forefoot region 12 along the medial side 22 and the lateral side 24 of the sole structure 100.

[0155] The second outsole portion 216 includes a first inner leg portion 236, a second inner leg portion 238, and a second outer leg portion 240. The first inner leg portion 236 is a generally elongated member with a generally spherical rear end. The second inner leg portion 238 and the second outer leg portion 240 are disposed on the front end of the first inner leg portion 236. The second inner leg portion 238 and the second outer leg portion 240 have a generally C-shaped cross-section, extend in a direction toward the front end of the sole structure 100, and include a longitudinal axis that is generally parallel to the longitudinal axis of the sole structure 100. Although the second inner leg portion 238 and the second outer leg portion 240 are described as including a longitudinal axis that extends generally parallel to the longitudinal axis of the sole structure 100, the second inner leg portion 238 and the second outer leg portion 240 include a generally arcuate shape, such that the second inner leg portion 238 and the second outer leg portion 240 are curved. Figure 10 As shown, the second medial leg portion 238 is curved such that its distal end extends toward the front end 18, away from the medial side 22, and extends in a direction toward the centerline of the sole structure 100. Similarly, the second lateral leg portion 240 is curved such that its distal end extends toward the front end 18, away from the lateral side 24, and extends in a direction toward the centerline of the sole structure 100. Based on the foregoing, the distal ends of the second medial leg portion 238 and the second lateral leg portion 240 converge toward each other in the forefoot region 12.

[0156] like Figure 10 As shown, the arcuate shape of the second inner leg portion 238 and the second outer leg portion 240 provides each of the second inner leg portion 238 and the second outer leg portion 240 with a convex outer surface corresponding to the inner side 22 and the outer side 24 of the sole structure 100, and a concave inner surface corresponding to the centerline of the sole structure 100. The concave inner surfaces of the second inner leg portion 238 and the second outer leg portion 240 are spaced apart from each other and opposite each other across the width of the sole structure 100.

[0157] The second medial leg portion 238 and the second lateral leg portion 240 mate with the base of the first medial leg portion 236 to provide a generally U-shape for the second outsole portion 216 in the forefoot region 12. While the second outsole portion 216 is described as including a generally U-shape in the forefoot region 12, it may include a C-shape, depending on the degree of curvature of the second medial leg portion 238 and the second lateral leg portion 240. Regardless of the shape of the second outsole portion 216 (i.e., U-shaped or C-shaped), the first medial leg portion 236 extends from the U-shaped or C-shaped portion of the second outsole portion 216 in a direction toward the heel region 16 of the sole structure 100. Figure 10 As shown, the first inner leg portion 236 initially tapers from a wider region near the second inner leg portion 238 and the second outer leg portion 240 toward a narrower region located between recesses 230a and 230b, and the width increases from the narrower region toward a spherical end located between recesses 230c and 230d. The spherical end includes an outer arcuate surface opposite the heel insert 234a.

[0158] like Figure 10 and 13 As shown in Figure -16, the second outsole portion 216 is configured to cover the heel cavity 128b, the middle section 134b of the cushioning member 106, and the forefoot protrusions 138c and 138d. Thus, the first inner leg portion 236 is disposed between the first inner leg portion 226 and the first outer leg portion 228 of the first outsole portion 214.

[0159] For reference Figure 10 and 13 When viewed along the width of the second inner leg portion 238 and the second outer leg portion 240, both the second inner leg portion 238 and the second outer leg portion 240 have a C-shaped cross-section. The second inner leg portion 238 and the second outer leg portion 240 taper from the center to each end, thereby forming an elongated bowl-shaped structure whose shape is suitable for accommodating the bottom side 116 of the buffer member 106.

[0160] The second inner leg portion 238 and the second outer leg portion 240 may be made of a first material 220 or may include a second material 222. The first material 220 is attached to the cushioning member 106. In particular, the second outsole portion 216 may include an inner insert 234b and an outer insert 234c, both formed of the second material 222. The inner insert 234b and the outer insert 234c are generally bean-shaped members, configured to conform to the bottom sides of the foreleg convex angles 138c and 138d. The second inner leg portion 238 and the second outer leg portion 240 include corresponding inner base portions 232b and outer base portions 232c, both formed of the first material 220. The inner base portion 232b and the outer base portion 232c are preferably shaped to resemble the corresponding inner insert 234b and outer insert 234c, wherein the inner base portion 232b and the outer base portion 232c are recesses with a depth substantially the same as the height of the corresponding inner insert 234b and outer insert 234c. Furthermore, the periphery of the inner base portion 232b and the outer base portion 232c is substantially the same as the periphery of the corresponding inner insert 234b and outer insert 234c to properly accommodate the inner insert 234b and the outer insert 234c and form generally continuous surfaces with different durability.

[0161] Compared to conventional outsoles formed as a single unit, the outsole 104 of this application facilitates the manufacturing of the sole structure 100. That is, forming the outsole 104 as separate components takes into account manufacturing tolerances and allows for easier assembly of each component into the sole interlayer 106. It is understood that if the outsole 104 were formed as a single unit, small alignment errors in the forefoot region of the outsole 104 (i.e., due to manufacturing tolerances) would have a significant impact on the alignment of the heel region of the outsole 104 relative to the sole interlayer 106. When the components are formed separately, this error is less noticeable due to the smaller size of the individual components.

[0162] refer to Figure 10 and Figure 14-16 The first inner leg portion 136 is made entirely of the first material 220. The third outer bottom portion 218 includes a second inner leg portion 242, a third inner leg portion 244, and a third outer leg portion 246. When viewed along the width of the third inner leg portion 244 and the third outer leg portion 246, both have a C-shaped cross-section. The third inner leg portion 244 and the third outer leg portion 246 taper from the center to each end, thereby forming an elongated bowl-shaped structure adapted to accommodate the bottom side 116 of the cushioning member 106.

[0163] The third medial leg portion 246 and the third lateral leg portion 248 are located at the front end of the second medial leg portion 242. The cross-section of the third medial leg portion 244 and the third lateral leg portion 246 is generally C-shaped, extending in a direction toward the front end of the sole structure 100, and includes a longitudinal axis substantially parallel to the longitudinal axis of the sole structure 100. Although the third medial leg portion 244 and the third lateral leg portion 246 are described as including a longitudinal axis extending substantially parallel to the longitudinal axis of the sole structure 100, the third medial leg portion 244 and the third lateral leg portion 246 include a generally arcuate shape, such that the third medial leg portion 244 and the third lateral leg portion 246 are curved. Figure 10 As shown, the third medial leg portion 244 is curved such that its distal end extends toward the front end 18, away from the medial side 22, and extends in a direction toward the centerline of the sole structure 100. Similarly, the third lateral leg portion 246 is curved such that its distal end extends toward the front end 18, away from the lateral side 24, and extends in a direction toward the centerline of the sole structure 100. Based on the foregoing, the distal ends of the third medial leg portion 244 and the third lateral leg portion 246 converge toward each other near the front end 18 of the sole structure 100.

[0164] like Figure 10 As shown, the arcuate shapes of the third inner leg portion 244 and the third outer leg portion 246 provide each of them with a convex outer surface corresponding to the inner side 22 and the outer side 24 of the sole structure 100, and a concave inner surface corresponding to the centerline of the sole structure 100. The concave inner surfaces of the third inner leg portion 244 and the third outer leg portion 246 are spaced apart from each other and opposite each other across the width of the sole structure 100.

[0165] The third medial leg portion 244 and the third lateral leg portion 246 cooperate with the base of the second medial leg portion 242 to provide a generally U-shape for the third outsole portion 218 in the forefoot region 12 near the front end 18 of the sole structure 100. While the third outsole portion 218 is described as including a generally U-shape in the forefoot region 12, it may include a C-shape in the forefoot region 12, depending on the degree of curvature of the third medial leg portion 244 and the third lateral leg portion 246. Regardless of the shape of the third outsole portion 218 (i.e., U-shaped or C-shaped), the second medial leg portion 242 extends from the U-shaped or C-shaped portion of the third outsole portion 218 in a direction toward the heel region 16 of the sole structure 100. Specifically, the second medial leg portion 242 extends away from the U-shaped or C-shaped portion of the third outsole portion 218 from the front end 18 of the sole structure 100 and extends between the second medial leg portion 238 and the second lateral leg portion 240.

[0166] like Figure 10 As shown, the second inner leg portion 242 initially tapers from a wider region near the third inner leg portion 244 and the third outer leg portion 246 towards a narrower region located between the distal ends of the second inner leg portion 238 and the second outer leg portion 240, and then widens from the narrower region towards a spherical end located between the second inner leg portion 238 and the second outer leg portion 240. The spherical end includes an outer arcuate surface that faces the base of a "U" or "C" formed by the second inner leg portion 238 and the second outer leg portion 240 of the second outer bottom portion 216. Finally, as Figure 10 As shown, the distal ends of the second inner leg portion 238 and the second outer leg portion 240 are opposite to the narrow region of the second inner leg portion 242, while the concave surfaces of the second inner leg portion 238 and the second outer leg portion 240 are opposite to the spherical end of the second inner leg portion 242.

[0167] like Figure 10 , 12 As shown in Figure 13, the third outsole portion 218 is configured to cover the forefoot region 12 of the sole structure 100. Specifically, the third outsole portion 218 is configured to cover the forefoot peripheral chamber 126b and a pair of toe convex angles 138a, 138b, wherein the second inner leg portion 242 is disposed between the second inner leg portion 238 and the second outer leg portion 240. The third outsole portion 218 may be formed entirely of the second material 222.

[0168] like Figure 14-16 As shown, the first outsole portion 214 is configured to cover the convex corners 138e-138i, and preferably exposes the recess 158a. Figure 10 As shown, the distal ends of recesses 230a and 230b terminate at the first ends 140e and 140f of the corresponding medial midfoot convex angle 138e and lateral midfoot convex angle 138f, respectively, thus being spaced apart from the second medial leg portion and the second lateral leg portion of the second outsole portion 216. Therefore, the third recess 146c and the fourth recess 146d of the cushioning member 106 are unrestricted, thereby providing greater flexibility to the sole structure around the third recess 146c and the fourth recess 146d relative to a sole structure comprising an integral outsole covering the entire bottom side of the cushioning member 106.

[0169] The rear end of the second medial leg portion 238 terminates at the first end of the medial forefoot protrusion 138c and is spaced apart from the front end of the third medial leg portion 244. Thus, the first recess 146a is exposed between the second medial leg portion 238 and the third medial leg portion 244. The rear end of the second lateral leg portion 240 terminates at the first end of the lateral forefoot protrusion 138d and is spaced apart from the front end of the third lateral leg portion 246. Thus, the second recess 146b is exposed between the second lateral leg portion 240 and the third lateral leg portion 246. Therefore, the first and second recesses 146a and 146b of the cushioning member 106 are unrestricted, thereby providing greater flexibility to the sole structure around the first and second recesses 146a and 146b relative to the sole structure comprising an integral outsole covering the entire bottom side of the cushioning member 106.

[0170] Refer again Figure 11 The outsole 104 can be formed to have a constant thickness, or it can have a variable thickness. The outsole 104 shown in the figures includes a variable thickness to allow the outsole 104 to be thicker in high-wear areas and thinner in areas that do not frequently contact the ground during use. For example, in... Figure 10 At section line 15-15, for example, the outsole 104 may have a reduced thickness compared to the thickness at the heel insert 234a, because the heel insert 234a may come into contact with the ground during each movement, and the portion of the outsole 104 located at section line 15-15 will have very little contact with the ground.

[0171] Localized areas of increased thickness are provided for the outsole 104 to minimize the overall weight of the outsole 104, thereby minimizing the overall weight of the sole structure 100. Further areas of reduced thickness provide the sole structure 100 with greater flexibility and mobility during use.

[0172] The upper 300 is attached to the sole structure 100 and includes an inner surface defining a cavity configured to receive and secure the foot for support on the sole structure 100. The upper 300 may be formed of one or more materials stitched or adhesively bonded together to form the cavity. Suitable materials for the upper may include, but are not limited to, mesh, textiles, foam, leather, and synthetic leather. Materials can be selected and positioned to impart durability, breathability, abrasion resistance, flexibility, and comfort.

[0173] The following terms provide exemplary constructions for the aforementioned cushioning elements, sole structures, and footwear articles.

[0174] Clause 1: A sole structure for footwear articles, the sole structure comprising: a cushioning member including a first series of convex angles arranged along the medial and lateral sides of the sole structure from a forefoot region to a heel region; and an outsole having a first side attached to the cushioning member, a second side disposed on a side of the outsole opposite to the first side and defining a ground contact surface of the sole structure, a first outsole portion having a generally U-shaped shape and including a first medial leg and a first lateral leg, and a second outsole portion spaced apart from and separated from the first outsole portion and having a generally U-shaped shape including a second medial leg and a second lateral leg, the first medial leg, the first lateral leg, the second medial leg, and the second lateral leg extending toward the front end of the sole structure.

[0175] Clause 2: The sole structure as described in Clause 1, wherein the second outsole portion includes an inner leg extending in a direction away from the front end.

[0176] Clause 3: The sole structure as described in Clause 2, wherein the inner leg extends between the first inner leg and the first outer leg.

[0177] Clause 4: The sole structure according to Clause 2, wherein the second outsole portion includes an arcuate portion extending between and connecting the second medial leg and the second lateral leg, the medial leg extending from the arcuate portion.

[0178] Clause 5: The sole structure according to any one of the preceding clauses, wherein the first outsole portion includes an arcuate portion extending between and connecting the first medial leg and the first lateral leg.

[0179] Clause 6: The sole structure as described in Clause 5, wherein the curved portion extends along the rear end of the sole structure in the heel region.

[0180] Clause 7: The sole structure according to any one of the preceding clauses further includes a third outsole portion, which is spaced apart from and separated from the first outsole portion and the second outsole portion.

[0181] Clause 8: The sole structure as described in Clause 7, wherein the third outsole portion includes a third medial leg and a third lateral leg extending in a direction toward the front end of the sole structure.

[0182] Clause 9: The sole structure as described in Clause 8, wherein the third outsole portion includes an arcuate portion extending between and connecting the third medial leg and the third lateral leg.

[0183] Clause 10: The sole structure as described in Clause 9, wherein the third outsole portion comprises a generally U-shaped portion.

[0184] Clause 11: The sole structure as described in Clause 9, wherein the third outsole portion includes an inner leg extending from the curved portion in a direction away from the front end.

[0185] Clause 12: The sole structure as described in Clause 11, wherein the inner leg extends between the second inner leg and the second outer leg.

[0186] Clause 13: The sole structure according to Clause 7, wherein a portion of the cushioning element is exposed in at least one of the following locations: (i) between the first outsole portion and the second outsole portion, and (ii) between the second outsole portion and the third outsole portion.

[0187] Clause 14: The sole structure according to any one of the preceding clauses, wherein at least one of the first outsole portion and the second outsole portion is formed of at least two different materials.

[0188] Clause 15: The sole structure according to any one of the preceding clauses, wherein the cushioning element is a fluid-filled chamber.

[0189] Clause 16: The sole structure according to any one of Clauses 1-14, wherein the cushioning element is a solid body formed of an elastic polymeric material.

[0190] Clause 17: The sole structure as described in Clause-14, wherein the cushioning element is a foam element encapsulated within a barrier element.

[0191] Clause 18: A footwear article comprising a sole structure pursuant to any of the preceding clauses.

[0192] Clause 19: A sole structure for footwear articles, the sole structure comprising: a cushioning member including a first series of convex angles arranged along the medial and lateral sides of the sole structure from a forefoot region to a heel region; and an outsole having a first side attached to the cushioning member, a second side disposed on a side of the outsole opposite to the first side and defining a ground contact surface of the sole structure, a first outsole portion having a generally U-shaped shape and including a first medial leg and a first lateral leg, and a second outsole portion spaced apart from and separated from the first outsole portion and having a generally U-shaped shape including a second medial leg and a second lateral leg, each of the first medial leg, the first lateral leg, the second medial leg, and the second lateral leg including a longitudinal axis extending generally parallel to the longitudinal axis of the sole structure.

[0193] Clause 20: The sole structure as described in Clause 19, wherein the second outsole portion includes an inner leg extending in a direction away from the front end of the sole structure.

[0194] Clause 21: The sole structure as described in Clause 20, wherein the inner leg extends between the first inner leg and the first outer leg.

[0195] Clause 22: The sole structure according to Clause 20, wherein the second outsole portion includes an arcuate portion extending between and connecting the second medial leg and the second lateral leg, the medial leg extending from the arcuate portion.

[0196] Clause 23: The sole structure according to any one of the preceding clauses, wherein the first outsole portion includes an arcuate portion extending between and connecting the first medial leg and the first lateral leg.

[0197] Clause 24: The sole structure as described in Clause 23, wherein the curved portion extends along the rear end of the sole structure in the heel region.

[0198] Clause 25: The sole structure according to any one of the preceding clauses further includes a third outsole portion that is spaced apart from and separate from the first outsole portion and the second outsole portion.

[0199] Clause 26: The sole structure as described in Clause 25, wherein the third outsole portion includes a third medial leg and a third lateral leg extending in a direction toward the front end of the sole structure.

[0200] Clause 27: The sole structure according to Clause 26, wherein the third outsole portion includes an arcuate portion extending between and connecting the third medial leg and the third lateral leg.

[0201] Clause 28: The sole structure as described in Clause 27, wherein the third outsole portion comprises a generally U-shaped portion.

[0202] Clause 29: The sole structure as described in Clause 27, wherein the third outsole portion includes an inner leg extending from the curved portion in a direction away from the front end.

[0203] Clause 30: The sole structure as described in Clause 29, wherein the inner leg extends between the second inner leg and the second outer leg.

[0204] Clause 31: The sole structure according to Clause 25, wherein a portion of the cushioning element is exposed in at least one of the following locations: (i) between the first outsole portion and the second outsole portion, and (ii) between the second outsole portion and the third outsole portion.

[0205] Clause 32: The sole structure according to any one of the preceding clauses, wherein at least one of the first outsole portion and the second outsole portion is formed of at least two different materials.

[0206] Clause 33: The sole structure according to any one of Clauses 19-32, wherein the cushioning element is a fluid-filled chamber.

[0207] Clause 34: The sole structure according to any one of Clauses 19-32, wherein the cushioning element is a solid body formed of an elastic polymeric material.

[0208] Clause 35: The sole structure according to any one of Clauses 19-32, wherein the cushioning element is a foam element encapsulated within a barrier element.

[0209] Clause 36: A footwear article comprising a sole structure pursuant to any one of the preceding clauses.

[0210] Clause 37: A sole structure for footwear articles, the sole structure comprising: a cushioning member including a first series of convex angles arranged along the medial and lateral sides of the sole structure from a forefoot region to a heel region; and an outsole having a first side attached to the cushioning member, a second side disposed on a side of the outsole opposite to the first side and defining a ground contact surface of the sole structure, a first outsole portion having a generally U-shaped shape and including a first medial leg and a first lateral leg, and a first insert attached to the first outsole portion and formed of a material different from the first outsole portion.

[0211] Clause 38: The sole structure according to Clause 37, wherein the first insert is arranged within a recess defined by the first outsole portion.

[0212] Clause 39: The sole structure according to any one of the preceding clauses, wherein,

[0213] The first insert is attached to one of the first inner leg and the first outer leg.

[0214] Clause 40: The sole structure described in Clause 39 further includes a second insert attached to the first outsole portion and formed of a material different from that of the first outsole portion.

[0215] Clause 41: The sole structure as described in Clause 38, wherein the second insert is attached to the other of the first medial leg and the first lateral leg.

[0216] Clause 42: The sole structure according to any one of the preceding clauses further includes a second insert attached to the first outsole portion and formed of a material different from the first outsole portion.

[0217] Clause 43: The sole structure according to any one of the preceding clauses, wherein the first outsole portion includes an arcuate portion extending between and connecting the first medial leg and the first lateral leg.

[0218] Clause 44: The sole structure according to Clause 43, wherein the first insert is attached to the first outsole portion in the arcuate portion.

[0219] Clause 45: The sole structure according to any one of the preceding clauses further includes a second outsole portion that is separated from and isolated from the first outsole.

[0220] Clause 46: The sole structure as described in Clause 45, wherein the second outsole portion comprises a generally U-shape having a second medial leg and a second lateral leg.

[0221] Clause 47: The sole construction as described in Clause 46,

[0222] It also includes a second insert that is attached to the second outsole portion and is formed of a material different from that of the second outsole portion.

[0223] Clause 48: The sole structure according to any one of Clauses 37-47, wherein the cushioning element is a fluid-filled chamber.

[0224] Clause 49: The sole structure according to any one of Clauses 37-47, wherein the cushioning element is a solid body formed of an elastic polymeric material.

[0225] Clause 50: The sole structure according to any one of Clauses 37-47, wherein the cushioning element is a foam element encapsulated within a barrier element.

[0226] Clause 51: A footwear article comprising a sole structure pursuant to any of the preceding clauses.

[0227] Clause 52: A sole structure for footwear articles, the sole structure including a cushioning member and a first outsole attached to the cushioning member, the first outsole defining a ground contact surface of the sole structure and including a generally U-shaped shape having a first leg extending along the outer side of the sole structure, a second leg extending along the inner side of the sole structure, and an arcuate segment extending between and connecting the first leg and the second leg, at least one of the first leg and the second leg including a variable width along the length of the at least one of the first leg and the second leg.

[0228] Clause 53: The sole structure as described in Clause 52, wherein the first outsole is disposed in the heel area of ​​the sole structure.

[0229] Clause 54: The sole structure as described in Clause 53, wherein the arcuate segment extends along the rear end of the sole structure.

[0230] Clause 55: The sole structure according to Clause 53 further includes a second outsole spaced apart from the first outsole, the second outsole being disposed closer to the front end of the sole structure than the first outsole.

[0231] Clause 56: The sole structure according to Clause 55, wherein the second outsole includes a first portion disposed on the inner side of the sole structure and a second portion disposed on the outer side of the sole structure.

[0232] Clause 57: The sole structure as described in Clause 56, wherein the first portion spans the width of the sole structure and is spaced apart from the second portion.

[0233] Clause 58: The sole structure according to Clause 56 further includes a third portion that extends between and connects the first and second portions, the first, second, and third portions cooperating to provide a second outsole having a generally U-shaped shape.

[0234] Clause 59: The sole structure according to Clause 58 further includes a third outsole disposed between the second outsole and the front end of the sole structure, the third outsole being spaced apart from the second outsole.

[0235] Clause 60: The sole construction as described in Clause 59, wherein the third outsole comprises a generally U-shaped form.

[0236] Clause 61: The sole structure according to any one of the preceding clauses further includes a second outsole having a generally U-shaped shape and spaced apart from the first outsole and a third outsole having a generally U-shaped shape and spaced apart from the second outsole, wherein the first outsole, the second outsole and the third outsole each include a longitudinal axis extending generally parallel to the longitudinal axis of the sole structure.

[0237] Clause 62: A footwear article comprising a sole structure pursuant to any of the preceding clauses.

[0238] Clause 63: A sole structure for footwear articles, the sole structure comprising: a cushioning element; and a first outsole attached to the cushioning element, the first outsole defining a ground contact surface of the sole structure and including a generally U-shaped shape having a first segment extending along the outer side of the sole structure, a second segment extending along the inner side of the sole structure, and an arcuate segment extending between and connecting the first and second segments, the first segment extending from the arcuate segment in a first direction toward a centerline of the sole structure to a first distal end, and the second segment extending from the arcuate segment in a second direction toward a centerline of the sole structure to a second distal end.

[0239] Clause 64: The sole structure according to Clause 63, wherein the first direction and the second direction converge.

[0240] Clause 65: The sole structure according to any one of the preceding clauses, wherein the first segment includes a first concave surface facing the centerline of the sole structure, and the second segment includes a second concave surface facing the centerline of the sole structure.

[0241] Clause 66: The sole structure according to Clause 65, wherein the first concave surface is opposite to the second concave surface.

[0242] Clause 67: The sole structure according to Clause 65, wherein the first segment includes a first convex surface formed on the side of the first segment opposite to the first concave surface, and the second segment includes a second convex surface formed on the side of the second segment opposite to the second concave surface.

[0243] Clause 68: The sole structure according to Clause 67, wherein the first convex surface is opposite to the inner side of the sole structure, and the second convex surface is opposite to the outer side of the sole structure.

[0244] Clause 69: The sole structure according to any one of the preceding clauses further includes a second outsole having a substantially U-shaped shape and being spaced apart from the first outsole.

[0245] Clause 70: The sole structure according to Clause 69 further includes a third outsole having a substantially U-shaped shape and being spaced apart from the second outsole.

[0246] Clause 71: The sole structure according to Clause 70, wherein each of the first outsole, the second outsole and the third outsole includes a longitudinal axis extending substantially parallel to the longitudinal axis of the sole structure.

[0247] Clause 72: A footwear article comprising a sole structure pursuant to any of the preceding clauses.

[0248] Clause 73: A sole structure for footwear articles, the sole structure comprising a cushioning element and an outsole, the cushioning element comprising a first series of convex angles and a first series of recesses arranged alternately along the medial and lateral sides of the sole structure from a forefoot region to a heel region; the outsole having: a first side attached to the cushioning element; a second side disposed on a side of the outsole opposite to the first side and defining a ground contact surface of the sole structure; a first outsole portion having a generally U-shaped shape and including a first medial leg and a first lateral leg, wherein each of the first medial leg and the first lateral leg includes a variable width measured in a direction extending between the medial and lateral sides of the sole structure to accommodate the convex angles and recesses of the cushioning element.

[0249] Clause 74: The sole structure according to Clause 73, wherein the first medial leg and the first lateral leg alternate between a wider region and a narrower region along the medial and lateral sides of the sole structure in a direction extending substantially parallel to the longitudinal axis of the sole structure.

[0250] Clause 75: The sole structure according to Clause 74, wherein the first outsole portion has a wavy shape extending from one end on the inner side of the sole structure along the rear end of the sole structure to a second end on the outer side of the sole structure.

[0251] Clause 76: The sole structure according to any one of the preceding clauses further includes a second outsole portion having a generally U-shaped shape and being separated from the first outsole.

[0252] Clause 77: The sole structure as described in Clause 76, wherein the second outsole portion includes an inner leg extending in a direction away from the front end of the sole structure.

[0253] Clause 78: The sole structure as described in Clause 77, wherein the inner leg extends between the first inner leg and the first outer leg.

[0254] Clause 79: The sole structure according to Clause 78, wherein the second outsole portion includes an arcuate portion extending between and connecting the second medial leg and the second lateral leg, the medial leg extending from the arcuate portion.

[0255] Clause 80: The sole structure described in Clause 76 further includes a third outsole portion having a generally U-shaped shape and being separated from the second outsole.

[0256] Clause 81: The sole structure according to Clause 80, wherein the third outsole portion includes an inner leg extending in a direction away from the front end of the sole structure.

[0257] Clause 82: The sole structure as described in Clause 81, wherein the inner leg extends between the second inner leg and the second outer leg.

[0258] Clause 83: The sole structure according to Clause 82, wherein the third outsole portion includes an arcuate portion extending between and connecting the third medial leg and the third lateral leg, the medial leg extending from the arcuate portion.

[0259] Clause 84: A footwear article comprising a sole structure pursuant to any of the preceding clauses.

[0260] The foregoing description has been provided for illustrative purposes. It is not intended to be exhaustive or limiting of this disclosure. Elements or features of a particular construction are generally not limited to that particular construction, but are interchangeable where applicable, and may be used in the chosen construction even if not specifically shown or described. It can also be varied in many ways. Such variations should not be considered a departure from this disclosure, and all such modifications are intended to be included within the scope of this disclosure.

Claims

1. A sole structure for footwear articles, the sole structure comprising: The cushioning member includes a first series of convex angles arranged along the inner and outer sides of the sole structure from the forefoot region to the heel region; and The outsole has: a first side attached to the cushioning member; a second side disposed on the side of the outsole opposite to the first side and defining the ground contact surface of the sole structure; a first outsole portion having a generally U-shaped shape and including a first medial leg and a first lateral leg; and a second outsole portion spaced apart from and separated from the first outsole portion and having a generally U-shaped shape including a second medial leg and a second lateral leg; the first medial leg, the first lateral leg, the second medial leg, and the second lateral leg extend toward the front end of the sole structure.

2. The sole structure according to claim 1, wherein, The second outsole portion includes an inner leg extending in a direction away from the front end.

3. The sole structure according to claim 2, wherein, The inner leg extends between the first inner leg and the first outer leg.

4. The sole structure according to claim 2, wherein, The second outsole portion includes an arcuate portion extending between and connecting the second inner leg and the second outer leg, the inner leg extending from the arcuate portion.

5. The sole structure according to claim 1, wherein, The first outsole portion includes an arcuate portion that extends between and connects the first inner leg and the first outer leg.

6. The sole structure according to claim 5, wherein, The curved portion extends along the rear end of the sole structure in the heel region.

7. The sole structure according to claim 1 further includes a third outsole portion, the third outsole portion being spaced apart from and separated from the first outsole portion and the second outsole portion.

8. The sole structure according to claim 7, wherein, The third outsole portion includes a third medial leg and a third lateral leg extending in a direction toward the front end of the sole structure.

9. The sole structure according to claim 8, wherein, The third outsole portion includes an arcuate portion that extends between and connects the third inner leg and the third outer leg.

10. The sole structure according to claim 9, wherein, The third outsole portion includes a generally U-shaped form.

11. The sole structure according to claim 9, wherein, The third outsole portion includes an inner leg extending from the arcuate portion in a direction away from the front end.

12. The sole structure according to claim 11, wherein, The inner leg extends between the second inner leg and the second outer leg.

13. The sole structure according to claim 7, wherein, A portion of the cushioning element is exposed in at least one of the following locations: (i) between the first outsole portion and the second outsole portion, and (ii) between the second outsole portion and the third outsole portion.

14. The sole structure according to claim 1, wherein, The first outsole portion includes a first outsole material, and the second outsole portion includes a second outsole material, wherein the first outsole material and the second outsole material are different from each other in at least one of appearance, physical properties and composition.

15. The sole structure according to claim 1, wherein, The buffer is a fluid-filled chamber.

16. The sole structure according to claim 1, wherein, The buffer is a solid body comprising a buffer material, which includes one or more polymers.

17. The sole structure according to claim 1, wherein, The buffer includes a foam element encapsulated in a barrier membrane.

18. A footwear article comprising the sole structure according to claim 1.

19. A sole structure for footwear articles, the sole structure comprising: The cushioning member includes a first series of convex angles arranged along the inner and outer sides of the sole structure from the forefoot region to the heel region; and The outsole has: a first side attached to the cushioning member; a second side disposed on the side of the outsole opposite to the first side and defining the ground contact surface of the sole structure; a first outsole portion having a generally U-shaped shape and including a first medial leg and a first lateral leg; and a second outsole portion spaced apart from and separated from the first outsole portion and having a generally U-shaped shape including a second medial leg and a second lateral leg; each of the first medial leg, the first lateral leg, the second medial leg, and the second lateral leg includes a longitudinal axis extending generally parallel to the longitudinal axis of the sole structure.

20. The sole structure according to claim 19, wherein, The second outsole portion includes an inner leg extending in a direction away from the front end of the sole structure.

21. The sole structure according to claim 20, wherein, The inner leg extends between the first inner leg and the first outer leg.

22. The sole structure according to claim 20, wherein, The second outsole portion includes an arcuate portion extending between and connecting the second inner leg and the second outer leg, the inner leg extending from the arcuate portion.

23. The sole structure according to claim 19, wherein, The first outsole portion includes an arcuate portion that extends between and connects the first inner leg and the first outer leg.

24. The sole structure according to claim 23, wherein, The curved portion extends along the rear end of the sole structure in the heel area.

25. The sole structure according to claim 19 further includes a third outsole portion, the third outsole portion being spaced apart from and separated from the first outsole portion and the second outsole portion.

26. The sole structure according to claim 25, wherein, The third outsole portion includes a third medial leg and a third lateral leg extending in a direction toward the front end of the sole structure.

27. The sole structure according to claim 26, wherein, The third outsole portion includes an arcuate portion that extends between and connects the third inner leg and the third outer leg.

28. The sole structure according to claim 27, wherein, The third outsole portion includes a generally U-shaped form.

29. The sole structure according to claim 27, wherein, The third outsole portion includes an inner leg extending from the arcuate portion in a direction away from the front end.

30. The sole structure according to claim 29, wherein, The inner leg extends between the second inner leg and the second outer leg.

31. The sole structure according to claim 25, wherein, A portion of the cushioning element is exposed in at least one of the following locations: (i) between the first outsole portion and the second outsole portion, and (ii) between the second outsole portion and the third outsole portion.

32. The sole structure according to claim 19, wherein, At least one of the first outsole portion and the second outsole portion is formed of at least two different materials.

33. The sole structure according to claim 19, wherein, The buffer is a fluid-filled chamber.

34. The sole structure according to claim 19, wherein, The buffer is a solid body, the solid body includes a buffer material, and the buffer material includes one or more polymers.

35. The sole structure according to claim 19, wherein, The buffer includes a foam element encapsulated in a barrier membrane.

36. A footwear article comprising the sole structure according to claim 19.

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