Interlocking assembly and sole structure for footwear

Abstract

To provide an article of footwear having sole structures with increased comfort and better fit, along with soles having improved cushioning systems or structural characteristics, where the articles of footwear are also manufactured according to more efficient manufacturing methods and more easily recycled.SOLUTION: There is provided an article of footwear having an interlocking assembly that includes a first component and a second component. The first component has a plurality of ribs, and the second component has a plurality of receptacles. The ribs of the first component are configured to be received within the receptacles of the second component to removably attach the first component and the second component.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present disclosure generally relates to footwear including a detachable outsole.

Background Art

[0002] Many conventional shoes or other footwear generally comprise an upper and a sole attached to the lower end of the upper. Conventional shoes further include an internal space for receiving the user's foot before the shoe is fixed to the foot, i.e., a void or cavity formed by the inner surfaces of the upper and the sole. The sole is attached to the lower surface or boundary of the upper and is disposed between the upper and the ground. As a result, the sole typically provides stability and cushioning to the user when the shoe is being worn. In some examples, the sole can include multiple components such as an outsole, a midsole, and an insole. The outsole can provide traction on the bottom surface of the sole, and the midsole can be attached to the inner surface of the outsole and provide cushioning to the sole or add stability. For example, the sole can include a specific foaming material that can increase stability at one or more desired positions along the sole, or a foaming material that can reduce stress or impact energy on the foot or leg when the user is running, walking, or engaged in another activity. The sole can also include additional components such as plates embedded in the sole to increase the overall rigidity of the sole and reduce energy loss during use. Further, the components of the sole are often permanently attached to each other using a bonding process involving adhesives and / or formulations, which requires substantial energy input and labor. Additionally, the adhesives and / or compounds can potentially limit the recyclability of the shoes.

[0003] The upper generally extends upward from the sole, defining an internal cavity that completely or partially encloses the foot. In most cases, the upper extends across the instep and toe areas of the foot, as well as across its center and sides. Many footwear may also include a tongue that bridges the gap between the center and side ends of the upper, extending across the instep area and defining an opening into the cavity. The tongue may also be positioned beneath the lacing system and between the center and side of the upper to allow for adjustment of the shoe's tightness. The tongue may also be manipulable by the user to allow the foot to move in and out of the internal space or cavity. In addition, the lacing system may allow the user to adjust specific dimensions of the upper or sole, thereby enabling the upper to accommodate a wide variety of foot types with varying sizes and shapes.

[0004] The uppers of many shoes can include a wide variety of materials that can be used to form the upper and can be selected for use based on one or more intended uses of the shoe. The upper may also include parts containing different materials specific to certain areas of the upper. For example, additional stability may be desirable in the fore or heel area of ​​the upper to provide a greater degree of resistance or rigidity. In contrast, other parts of the shoe may include soft woven fabrics to provide areas that are stretch-resistant, flexible, breathable, or moisture-wicking. [Overview of the Initiative] [Problems that the invention aims to solve]

[0005] However, in many cases, footwear is desired that has a sole structure with increased comfort and better fit, along with an improved cushioning system or structural characteristics. In addition, footwear is desired that is manufactured according to more efficient manufacturing methods and is easier to recycle. [Means for solving the problem]

[0006] The footwear described herein may have a variety of configurations. The footwear may have an upper and a sole structure connected to the upper.

[0007] In one aspect, an interlocking assembly for footwear includes a first component having a plurality of ribs and a second component having a plurality of receptacles. The plurality of ribs of the first component are configured to be received within the plurality of receptacles of the second component for detachable attachment of the first and second components. In some embodiments, at least one of the plurality of receptacles is exposed through the underside of the second component. In some embodiments, the plurality of receptacles are located between the underside and topside of the second component. In some embodiments, the plurality of receptacles are located between the central side and the lateral side of the second component. In some embodiments, the plurality of ribs extend from the heel region to the midfoot region of the first component. In some embodiments, the first component is formed from a different material than the second component. In some embodiments, the first component is configured to fit into the second component.

[0008] In another aspect, a sole structure for footwear includes a midsole and an outsole. The outsole includes a plurality of ribs configured to be received within a portion of the midsole. In some embodiments, the plurality of ribs are located within the heel region, and the plurality of ribs are exposed through the central and lateral sides of the midsole. In some embodiments, one or more of the plurality of ribs include a cavity. In some embodiments, one or more of the plurality of ribs extend from the lateral side to the central side of the midsole. In some embodiments, each rib of the plurality of ribs is configured to detachably hold the outsole relative to the midsole.

[0009] In yet another aspect, a connecting assembly for footwear includes a midsole having a flange with a securing feature and an outsole having a chamber at least partially defined by a clip extending from the heel end of the outsole. The flange is configured to be received within the chamber in the assembled configuration. Furthermore, the securing feature is configured to engage detachably with the clip in the assembled configuration. In some embodiments, a through-hole is at least partially defined by the clip and configured to receive the securing feature in the assembled configuration. In some embodiments, the securing feature includes a first block extending from the lateral side of the flange and a second block extending from the central side of the flange. In some embodiments, the clip extends from the top surface of the outsole between the central and lateral sides of a rib to at least partially define the chamber. In some embodiments, the rib includes a rounded head extending from a curved base, a cavity extending through the head, and a slot extending through the base. In addition, the flange defines at least partially the receptacle of the midsole, and the head of the rib is configured to fit within the receptacle of the midsole in the assembled configuration. In some embodiments, the outsole and midsole are configured to bend apart from each other during disassembly of the connecting assembly.

[0010] Other aspects of the footwear, including its features and advantages, will become apparent to those skilled in the art by examining the drawings and the detailed description herein. Therefore, all such aspects of the footwear are intended to be included in the detailed description and this summary. [Brief explanation of the drawing]

[0011] [Figure 1] This is a bottom and mid-side perspective view of a footwear device configured as a right shoe, including an upper and sole structure, according to an embodiment of the present disclosure. [Figure 2] This is a schematic diagram of a cross-section of the outsole. [Figure 3]This is a schematic diagram of a cross-section of the midsole. [Figure 4] Figure 3 is a schematic cross-sectional view of a connecting assembly for the sole structure, including the midsole and outsole shown in Figure 2. The connecting assembly is depicted in its assembled configuration. [Figure 5] This is a partial central side view of another embodiment of a linkage assembly for a sole structure including a midsole and outsole, the linkage assembly depicted in a partial assembly configuration. [Figure 6] Figure 5 is a partial side view of the connecting assembly, which is depicted in its assembled configuration. [Figure 7] This is a partial top view of another embodiment of a connecting assembly for a sole structure including a midsole and outsole, the connecting assembly being shown in an assembled configuration. [Figure 8] This is a partial central side view of yet another embodiment of a linking assembly for a sole structure including a midsole and outsole, the linking assembly depicted in its assembled configuration. [Figure 9] This is a schematic diagram of a top view of another embodiment of the outsole. [Figure 10] This is a schematic diagram of a partial side view of another embodiment of the outsole. [Figure 11] This is a schematic diagram of a top perspective view of another embodiment of the outsole. [Figure 12] Figure 11 is a schematic diagram of the bottom perspective view of the outsole. [Figure 13] This is a schematic diagram of a top perspective view of another embodiment of the midsole. [Figure 14] Figure 13 is a schematic diagram of the bottom perspective view of the midsole. [Figure 15] This is a partial side view of another embodiment of the connecting assembly of the assembly configuration, which comprises the outsole shown in Figures 11 and 12 and the midsole shown in Figures 13 and 14. [Figure 16] This is a partial rear view of the connecting assembly shown in Figure 15, which is attached to the upper. [Modes for carrying out the invention]

[0012] The following description and accompanying drawings disclose various embodiments or configurations of shoe and sole structures. While embodiments of shoe or sole structures are disclosed in relation to sports shoes such as running shoes, tennis shoes, and basketball shoes, concepts related to embodiments of shoe or sole structures may apply to a wide range of footwear and footwear styles, including, for example, cross-training shoes, football shoes, golf shoes, hiking shoes, hiking boots, ski and snowboard boots, soccer shoes and cleats, walking shoes, and track cleats. Concepts of shoe or sole structures may also apply to articles of footwear considered non-athletic, including dress shoes, sandals, loafers, slippers, and heels. In addition to footwear, certain concepts described herein may also apply to and be incorporated into other types of clothing or other athletic equipment, including helmets, pads or protective pads, shin guards, and gloves. Furthermore, certain concepts described herein may be incorporated into cushions, backpack straps, golf clubs, or other consumer or industrial products. Thus, the concepts described herein may be utilized in a variety of products.

[0013] As used herein, the term “about” refers to variations in numerical quantities that may occur through typical measurement and manufacturing procedures used for footwear or other products, which may include embodiments of the disclosure herein, careless errors in these procedures, variations in the manufacture, source, or purity of materials used in the manufacture of a composition or mixture or in the implementation of a method. Throughout this disclosure, the terms “about” and “approximately” refer to a range of ±5% of the numerical value preceding the term.

[0014] The present disclosure is directed to footwear and / or specific components of footwear, such as uppers and / or soles or sole structures. The upper may include knit components, woven fabrics, and / or non-woven fabrics. The knit components may be manufactured by knitting yarns, the woven fabrics by weaving yarns, and the non-woven fabrics by manufacturing single-layer non-woven fabrics. The knitted fabric includes fabrics formed by knitting operations such as warp knitting, weft knitting, reciprocating knitting, circular knitting, and / or other suitable knitting operations. The knitted fabric may have, for example, a plain knit structure, a mesh knit structure, and / or a rib knit structure. The woven fabric includes, but is not limited to, fabrics formed by any of a number of weaving methods such as plain weave, twill weave, satin weave, dobby weave, jacquard weave, double weave, and / or double cloth weave. The non-woven fabric includes, for example, fabrics manufactured by an airlaid method and / or a spunlace method. The upper may be provided with various materials such as a first yarn, a second yarn, and / or a third yarn that may have various properties or various visual properties.

[0015] FIG. 1 shows an exemplary embodiment of a footwear 100 including an upper 102 and a sole structure 104. The upper 102 is attached to the sole structure 104 and together defines an internal cavity (not shown) into which a foot can be inserted. For reference, the footwear 100 defines a forefoot region 108, a midfoot region 110, and a heel region 112. The forefoot region 108 generally corresponds to the portion of the footwear 100 that encloses the portion of the foot that includes the toes, the ball of the foot, and the joints connecting the metatarsals to the phalanges or the knuckles. The midfoot region 110 is adjacent and proximate to the forefoot region 108 and generally corresponds to the portion of the footwear 100 that encloses the arch of the foot together with the bridge of the foot. The heel region 112 is adjacent and proximate to the midfoot region 110 and generally corresponds to the portion of the footwear 100 that encloses the rear portion of the foot, including the heel or calcaneus, the ankle, and / or the Achilles tendon.

[0016] Many conventional footwear uppers are formed from multiple elements (e.g., fabrics, polymer foams, polymer sheets, leather, and synthetic leather) that are joined by adhesion or stitching at seams. In some embodiments, the upper 102 of the footwear 100 is formed from a knit structure or knit components. In various embodiments, the knit components can incorporate various types of yarns that can provide different properties to the upper. For example, one region of the upper 102 may be formed from a first type of yarn that imparts a first set of properties, and another region of the upper 102 may be formed from a second type of yarn that imparts a second set of properties. Using this configuration, the properties of the upper 102 can vary across the entirety of the upper 102 by selecting specific yarns for different regions of the upper 102.

[0017] The footwear 100 also includes a medial side 116 and a lateral side 118. In particular, the lateral side 118 corresponds to the outer portion of the footwear 100, and the medial side 116 corresponds to the central portion of the footwear 100. Thus, the left and right footwear have opposing lateral and medial sides, such that the medial sides 116 are closest to each other when the user is wearing the footwear 100, while the lateral sides 118 are defined as the sides that are farthest from each other during wear. The medial side 116 and the lateral side 118 are adjacent to each other at the opposing distal ends of the footwear 100, although other configurations are possible.

[0018] The footwear 100 further includes a toe end portion 122 and a heel end portion 124. In particular, the toe end portion 122 corresponds to the foremost part of the footwear 100, and the heel end portion 124 corresponds to the rearmost part of the footwear 100. Thus, the toe end portion 122 and the heel end portion 124 are disposed at opposing ends of the footwear 100. In some embodiments, the toe end portion 122 is disposed within the forefoot region 108, and the heel end portion 124 is disposed within the heel region 112, although other configurations are possible.

[0019] Unless otherwise specified, the forefoot region 108, midfoot region 110, heel region 112, midline 116, and lateral side 118 are intended to define boundaries or regions of the footwear 100. To that end, the forefoot region 108, midfoot region 110, heel region 112, midline 116, and lateral side 118 generally characterize sections of the footwear 100. Furthermore, both the upper 102 and the sole structure 104 can be characterized as having portions within the forefoot region 108, midfoot region 110, heel region 112, and on the midline 116 and lateral side 118. Thus, the upper 102 and the sole structure 104, and / or individual portions of the upper 102 and the sole structure 104, may include portions located within the forefoot region 108, midfoot region 110, heel region 112, and midline 116 and lateral side 118.

[0020] The sole structure 104 is connected to or fixed to the upper 102 and extends between the user's foot and the ground when the footwear 100 is worn by the user. The sole structure 104 may include one or more components, which may include an outsole, a midsole, a heel, a toe cap, and / or an insole. For example, in some embodiments, the sole structure may include an outsole that provides traction to the user and structural integrity to the sole structure, a midsole that provides a cushioning system, and an insole that supports the user's arch. As will be further discussed herein, the sole structure 104 of embodiments of the present invention includes one or more components that provide a sole structure 104 comprising a removable outsole.

[0021] In the illustrated embodiment, the sole structure 104 includes an outsole 130 and a midsole 134. The outsole 130 may define the bottom edge or bottom surface 140 of the sole structure 104 that crosses the heel region 112, the midfoot region 110, and the forefoot region 108. Furthermore, the outsole 130 may include the ground engagement portion or ground engagement surface of the sole structure 104 and may be on the opposite side of the insole of the sole structure 104. As shown in Figure 1, the bottom surface 140 of the outsole may include a tread pattern 144 which may include various shapes and configurations. The outsole 130 may be formed from one or more materials to impart durability, abrasion resistance, or traction to the sole structure 104. In some embodiments, the outsole 130 may be formed from any type of elastomer material, e.g., rubber including thermosetting elastomers or thermoplastic elastomers, or from a thermoplastic material, e.g., thermoplastic polyurethane (TPU). In some embodiments, the outsole 130 may define a Shore A hardness up to 95. Furthermore, the outsole 130 may be manufactured by processes including injection molding, vulcanization, layer-by-layer printing, i.e., additive manufacturing systems or methods.

[0022] Referring further to Figure 1, the midsole 134 may be constructed individually from thermoplastic materials such as polyurethane (PU) and / or ethylene vinyl acetate (EVA), their copolymers, or similar types of materials. In other embodiments, the midsole 134 may be made of EVA-Solid-Sponge ("ESS") material, EVA foam (e.g., PUMA® Profoam Lite). TMThe midsole may be made of a single polymer material, or a blend of materials such as EVA copolymer, thermoplastic polyurethane, polyether, olefin block copolymer, organic sheet, thermoplastic material (e.g., thermoplastic polyurethane, thermoplastic elastomer, thermoplastic polyolefin, etc.), or supercritical foam.

[0023] In embodiments in which the midsole 134 is formed from a supercritical foaming process, the supercritical foam may include microporous foams or particulate foams such as TPU, EVA, PEBAX®, or mixtures thereof, produced using a process carried out in any well-heated / pressurized vessel capable of handling the mixing of a supercritical fluid (e.g., CO2, N2, or mixtures thereof) with a preferably molten material (e.g., TPU, EVA, polyolefin elastomer, or mixtures thereof). During the exemplary process, a solution of the supercritical fluid and molten material is pumped into a pressurized vessel, after which the pressure in the vessel is released, resulting in the molecules of the supercritical fluid rapidly turning into a gas, forming small pockets within the material and causing the material to expand into a foamy state. In further embodiments, the midsole 134 may be formed using alternative methods known in the art, including the use of an expansion press, an injection molding machine, a pellet expansion process, a cold foaming process, a compression molding technique, a die cut, or any combination thereof. For example, the midsole 134 may be formed using a process that includes an initial foaming step in which supercritical gas is used to foam the material, and then it is compression molded or die-cut into a specific shape.

[0024] In the illustrated embodiment of Figure 1, as will be described in more detail throughout this disclosure, the sole structure 104 is provided as a connecting assembly in which a first component, such as an outsole 130, and a second component, such as a midsole 134, are detachably coupled to each other by a mechanical attachment mechanism. Referring to Figure 1, the central axis C extends vertically through the footwear 100 in the metafoot region 110, and the longitudinal axis L extends horizontally along the outsole 130, i.e., perpendicular to the central axis C, and intersects the toe portion 122 and heel portion 124 of the footwear 100. To this end, at least a portion of the bottom surface 140 of the outsole 130 is tangent to, or otherwise coincides with, the longitudinal plane defined by the longitudinal axis L. In some embodiments, the outsole 130 and the midsole 134 are each curved perpendicularly to the central axis C, so that the outsole 130 may define a concave or convex curvature with respect to the longitudinal plane of the longitudinal axis L.

[0025] Figure 2 shows a schematic cross-sectional view of an embodiment of the outsole 150, which includes an upper surface 154 located opposite the bottom surface 158 and extending between the toe portion 162 and the heel portion 166. Furthermore, the outsole 150 includes an attachment mechanism in the form of ribs 174. In particular, each of the ribs 174 includes a head 178 connected to a base 182 by a stem 186. The base 182 is positioned on the upper surface 154 of the outsole 150 and defines the interface between each rib 174 and the upper surface 154 of the outsole 150. As illustrated in Figure 2, the ribs 174 are provided as a plurality of ribs 174A, 174B, 174C, and 174D, which are sequentially labeled from toe to heel, i.e., toward the heel. Accordingly, the rib 174 includes a rib 174A located furthest to the toe, i.e., furthest from the heel end 166 of the outsole 150; a rib 174D located furthest to the heel, i.e., closest to the heel end 166 of the outsole 150; and ribs 174B and 174C located in between. In some embodiments, more or fewer ribs 174 are provided. For clarity, ribs 174A-D may be referred to herein individually or collectively as rib 174.

[0026] In the illustrated embodiment, the base 182 of each rib 174 narrows from the top surface 154 toward the stem 186 of each rib 174, with the base 182 being wider than the stem 186 in width, i.e., in the horizontal dimension, and in particular, the base 182 curves between the top surface 154 and the stem 186. In this way, the base 182 provides stability to each rib 174 and allows each rib 174 to bend toward the toe or heel around each base 182.

[0027] Continuing to refer to Figure 2, the head 178 is connected to the stem 186 on the opposite side of the base 182. In some embodiments, the head 178 extends outward from the stem 186 in both vertical and horizontal directions. In some embodiments, the head 178 is wider and taller than the stem 186, i.e., the vertical dimension H1 between the head 178 and the base 158 is large. In the illustrated embodiments, the head 178 is provided as having a generally rounded or circular cross-sectional shape, but the head 178 may be of different sizes and shapes. For example, the head 178 may define, among other things, a rectangular, triangular, elliptical, trapezoidal, conical, frustoconical, pyramidal, frustoconical, alphabetical, digit, emoji, logogram, idiogram, or any irregular cross-sectional shape.

[0028] Furthermore, the stem 186 defines a projection axis P away from the head 178. For clarity, the projection axis P is illustrated only for the ribs 174A. However, it is understood that each rib 174 includes a projection axis P defined along the stem 186. As shown in Figure 2, the projection axis P forms an angle θ with respect to the longitudinal axis L, such that the rib 174A extends at an angle θ with respect to the longitudinal axis L. In some embodiments, the ribs 174 are positioned perpendicular to the longitudinal axis L. In the illustrated embodiment, the rib 174A extends at an angle θ less than 90 degrees, but other configurations are possible. For example, two or more ribs 174 may extend parallel to each other at an angle θ greater than 90 degrees. Alternatively, two or more of the ribs 174 may extend at a variety of angles θ.

[0029] Still referring to Figure 2, the projection axis P extends through the center of the head 178 of the rib 174, and the head 178 is generally centered on the projection axis P, and therefore, the head 178 is generally centered on the stem 186. In some embodiments, the head 178 cancels out with respect to the stem 186 and the projection axis P. For example, the head 178 may extend substantially toward the toe side of the stem 186 such that the head 178 is substantially positioned toward the toe side of the projection axis P. Alternatively, the head 178 may extend substantially toward the heel side of the stem 186 such that the head 178 is substantially positioned toward the heel side of the projection axis P. The position of the head 178 relative to the stem 186 affects the cushioning and / or stiffness performance characteristics of the rib 174 and / or outsole 150.

[0030] Continuing to refer to Figure 2, each rib 174 is partially hollow, and the head 178 includes a cavity 190 that extends partially or entirely through the head 178 from the side toward the center. In some embodiments, the cavity 190 is empty, but other configurations are possible. The cavity 190 may be partially or completely filled with a fluid, gas, liquid, bead-like particles, foam, biodegradable material, bacteria, spring member, or dampening member. In some embodiments, the cavity 190 is open and exposed to the side 118 or center 116 of the footwear 100. The cavity 190 may be obscured, or instead, the cavity 190 may extend continuously over the entire length of the head 178. In some examples, the cavity 190 may extend into or communicate with the stem 186, base 182, and bottom surface 158 of the outsole 150. For example, the cavity 190 may extend from the head 178 through the stem 186 and be exposed at the bottom surface 158 of the outsole 150. In this way, the cavity 190 can perform several functions, including, for example, an acoustic chamber, an air vent or passage, negative space to reduce weight and / or density, and, above all, aesthetic features.

[0031] As shown in Figure 2, the rib 174 is located in the heel region 112 of the footwear 100 and defines the outsole attachment region 194 of the outsole 150. The outsole attachment region 194 forms a boundary or perimeter surrounding the rib 174, and thus the outsole attachment region 194 defines a region or surface region. In some embodiments, the outsole attachment region 194 constitutes less than 50% of the total surface area of ​​the upper surface 154 of the outsole 150. The outsole attachment region 194 is considered to constitute 50% or more of the total area of ​​the upper surface 154. In addition, the rib 174 can be located within the forefoot region 108 and the midfoot region 110 such that the outsole attachment region 194 is located within the forefoot region 108 and the midfoot region 110. Multiple outsole attachment regions may be defined by separate sets or groups of ribs, as described below.

[0032] Remaining in Figure 2, the ribs 174 are spaced apart from each other so as to form gaps 198 between them, across the upper surface 154 of the outsole 150. The gaps 198 are sized and shaped according to the ribs 174, and as a result, the gaps 198 can be enlarged or minimized by changing the size or shape of the ribs 174, or by changing the spacing, i.e., distance, between each of the ribs 174. The ribs 174 are spaced apart by various distances, such as the relatively large distance between rib 174C and rib 174D. Furthermore, although the ribs 174 in this embodiment are shown in a cross-sectional view, it should be understood that the ribs 174 extend at least partially between the side 118 and the center 116 of the footwear 100 (see Figure 1). In some embodiments, the ribs 174 extend continuously between the side 118 and the center 116 of the footwear 100, but other configurations are also possible. One or more of the ribs 174 may be identical to each other or may have different shapes, and may be provided as a set or arrangement of individual parts spaced apart from each other in the direction from the side to the center or from the center to the side. One or more of the ribs 174 may be provided so as to change in dimensions vertically or horizontally between the side 118 and the center 116 of the footwear 100. Furthermore, the ribs 174 may be provided curved concave or convex with respect to the central plane of the central axis C.

[0033] Continuing to refer to Figure 2, the outsole 150 is curved with respect to the longitudinal plane of the longitudinal axis L. In the illustrated embodiment, the outsole 150 is curved away from the longitudinal plane at the toe portion 162 and the heel portion 166, and is also curved in the midfoot region 110. As a result, the outsole 150 is bent convexly in the forefoot region 108 and the heel region 112, and concavely in the midfoot region 110. The outsole 150 may also be curved concavely or convexly in other directions, such as between the lateral side 118 and the central side 116 (see Figure 1).

[0034] Figure 3 shows a schematic cross-sectional view of the midsole 230, which includes the upper surface 234 opposite the lower surface 238 and extends between the toe area 242 and the heel area 246. In the illustrated embodiment, a plurality of ridges 250 are formed on the upper surface 234 within the forefoot area 108, and the rim 254 extends from the upper surface 234 within the heel area 112, adjacent to the heel area 246. The midsole 230 is shorter in the forefoot area 108 than in the heel area 112 because the height H2 between the toe area 242 and the heel area 246 changes, but other configurations are possible.

[0035] As shown in Figure 3, the opening 258 is formed on the lower surface 238 of the midsole 230. In the illustrated embodiment, the opening 258 communicates with each receptacle 262 formed inside the midsole 230 between the lower surface 238 and the upper surface 234. Each receptacle 262 is defined by the inner surface 266 of the midsole 230 and forms a generally rounded or circular cross-sectional shape, and as a result, the receptacle 262 is configured to receive the rib 174 in the assembled configuration (see Figure 4). Thus, the receptacle 262 is provided in any size and shape corresponding to the rib 174. In the exemplary embodiment of Figure 3, a plurality of receptacles 262, including receptacles 262A, 262B, 262C, and 262D, are sequentially labeled toward the heel, i.e., toward the heel. Therefore, receptacles 262 include receptacle 262A, which is furthest to the toe, i.e., furthest from the heel end 246 of the midsole 230, and receptacle 262D, which is furthest to the heel, i.e., furthest from the heel end 246 of the midsole 230, with receptacles 262B and 262C located between them. For this reason, openings 258 are plural, including opening 258A corresponding to receptacle 262A, opening 258B corresponding to receptacle 262B, opening 258C corresponding to receptacle 262C, and opening 258D corresponding to receptacle 262D. For clarity, receptacles 262A-D may be referred to here individually or collectively as receptacle 262, and openings 258A-D may be referred to here individually or collectively as opening 258.

[0036] Furthermore, as shown in Figure 3, the receptacle 262 is opened and exposed through the lower surface 238 by an opening 258, the opening 258 being relatively narrower than the receptacle 262. In particular, the opening 258 is at least partially defined by the flange 270 of the midsole 230. The flanges 270 are provided in pairs facing the lower surface 238 of the midsole 230, forming the opening 258 between them, so that the pair of flanges 270 extend inward toward each other without contacting each other. The flanges 270 change in size and shape to elastically engage with the ribs 174 of the outsole 150. Furthermore, the flanges 270 are configured to fit into the gap 198 of the outsole 150 when in the assembled configuration (see Figure 4). Thus, the flanges 270 are generally L-shaped members, but other configurations are also possible.

[0037] As shown in Figure 3, the receptacle 262 is located in the heel region 112 of the footwear 100 and defines a midsole attachment region 274 of the midsole 230, which is configured to correspond to the outsole attachment region 194 of the outsole 150. The midsole attachment region 274 forms a boundary or perimeter surrounding the receptacle 262, and thus the midsole attachment region 274 defines a region or surface region. In some embodiments, the midsole attachment region 274 constitutes less than 50% of the total surface area of ​​the underside 238 of the midsole 230. It is conceivable that the midsole attachment region 274 constitutes more than 50% of the total area of ​​the underside 238. Furthermore, the receptacle 262 can be located within the forefoot region 108 and the midfoot region 110 such that the midsole attachment region 274 is located within the forefoot region 108 and the midfoot region 110. Multiple midsole mounting areas may be defined by separate sets or groups of receptacles, as described below.

[0038] Continuing to refer to Figure 3, the midsole 230 is curved with respect to the longitudinal plane of the longitudinal axis L. In the illustrated embodiment, the midsole 230 is curved away from the longitudinal plane at the toe area 242 and heel area 246, and is also curved within the midfoot area 110. To this end, the midsole 230 is bent convexly in the forefoot area 108 and heel area 112, and concavely in the midfoot area 110. The outsole 150 may be curved concavely or convexly in other directions, such as between the lateral side 118 and the central side 116 (see Figure 1). In addition, the upper surface 234 of the midsole 230 follows a different curvature than the lower surface 238, and as a result, the upper surface 234 is substantially flatter in the heel area than the lower surface 238, although other configurations are possible. Furthermore, the midsole 230 and outsole 150 are configured to fit or interlock with each other, as shown in Figure 4, such that the upper surface 154 of the outsole 150 is curved and molded to contact the lower surface 238 of the midsole 230.

[0039] Figure 4 is a schematic diagram of a midsole 230 and outsole 150 forming a connecting assembly 286, which includes at least a portion of the sole structure 104 (see Figure 1) for footwear 100. In the illustrated embodiment of Figure 4, the outsole 150 is partially received within the midsole 230, and in particular, the ribs 174A-D of the outsole 150 are received within the receptacles 262A-D of the midsole 230, securing the outsole 150 to the midsole 230. Furthermore, the ribs 174A-D are configured to be attachable to the midsole 230 within the receptacles 262A-D, allowing the user to selectively assemble and disassemble the connecting assembly 286 by selectively connecting and separating the midsole 230 and the outsole 150. In this way, the connecting function is performed by the ribs 174A-D of the outsole 150 interacting with the receptacles 262A-D of the midsole 230.

[0040] In Figure 4, the ribs 174A-D are shown fully connected to the receptacles 262A-D, i.e., fully assembled. To this end, the exemplary assembly process includes the head 178 of each rib 174 being received into the corresponding receptacle 262 through the corresponding opening 258. Specifically, the head 178 of each rib 174 is aligned with the corresponding opening 258 of the midsole 230, or pressed against or pushed against the flange 270 of the lower surface 238 of the midsole 230, to allow the head 178 to pass through the opening 258 toward the receptacle 262. Because the size of the head 178 is enlarged relative to the opening 258, the head 178 is deformed, e.g., compressed, as it passes through the opening 258. In some embodiments, the cavity 190 of each head 178 allows for greater deformation, e.g., collapse, during assembly. Next, after the head 178 passes through the opening 258 and is pushed or pressed into the receptacle 262, the head 178 expands to contact the inner surface 266, thereby at least partially filling the receptacle 262, while the stem 186 and base 182 of each rib 174 are at least partially positioned within the opening 258 and at least partially filled. To this end, the head 178 of the rib 174 may expand very rapidly so that an audible sound, such as a snap, click, or pop, is produced by contact with the inner surface 266 of the receptacle 262. In this way, the rib 174 is fitted into the receptacle 262, and therefore the outsole 150 is fitted into the midsole 230. At the same time, the flanges 270 of the midsole 230 interlock with both sides of each rib 174 and are received within the gap 198 of the outsole 150. Therefore, disassembly or removal of the head 178 from the receptacle is prevented by the narrow configuration of the opening 258 to prevent accidental or unintentional disassembly.

[0041] In some embodiments, the flange 270 deforms and / or displaces during assembly due to contact with the rib 174. In some embodiments, the flange 270 remains in place and undeformed while the rib 174 deforms or displaces due to contact with the flange 270. The outsole 150 is held and / or secured to the midsole 230 because the size of the head 178 and receptacle 262 is enlarged relative to the stem 186 and opening 258, at least partially. In some embodiments, the ribs 174A-D can be fitted into the receptacles 262A-D by sliding conversion from the side to the center, or from the center to the side.

[0042] The head 178 may be displaced, for example, rotated or bent around the stem 186 or base 182 of the rib 174 during the assembly process to further enhance the retention of the outsole 150 to the midsole 230 after assembly. Additionally or alternatively, the head 178 may be displaced from the pre-assembly configuration (see Figure 2) to the assembled configuration (see Figure 4), and as a result, the angle θ may increase or decrease due to the assembly process. Furthermore, referring to Figure 4, the height H1 of the rib 174 is less than the height H2 of the midsole 230. In the illustrated embodiment, the rib 174 of the outsole 150 is at a height H1 that is approximately 75% of the height H2 of the midsole 230. In some embodiments, the rib 174 of the outsole 150 is at a height H1 greater than 75% of the height H2 of the midsole 230, or alternatively, the rib 174 is positioned at various heights H1 greater than or less than 75% of the height H2 of the midsole 230.

[0043] As shown in Figure 4, the toe portion 162 of the outsole 150 is spaced apart from the toe portion 242 of the midsole 230, while the heel portion 166 of the outsole 150 is aligned with the heel portion 246 of the midsole 230 and has the same width. In some embodiments, the toe portion 162 of the outsole 150 and the toe portion 242 of the midsole 230 are aligned and have the same width. Furthermore, the outsole 150 and the midsole 230 are fitted together such that the upper surface 154 of the outsole 150 is firmly pressed against the lower surface 238 of the midsole 230. In some embodiments, a gap or discontinuity (not shown) may be formed between the upper surface 154 of the outsole 150 and the lower surface 238 of the midsole 230.

[0044] The outsole 150 and / or midsole 230 may each be composed of a single component, or they may each be composed of multiple separate or separable components. It is further intended that the outsole 150 and midsole 230 be manufactured separately from each other. In this way, more complex geometric shapes, such as undercuts, can be achieved compared to a process in which the outsole 150 and midsole 230 are formed together and / or joined by conventional means such as cementing or co-molding. In addition, because the outsole 150 and midsole 230 are manufactured separately, dimensional tolerances, i.e., precision, can be lower. Furthermore, the outsole 150 can be removed from the midsole 230 without damaging either the outsole 150 or the midsole 230. In this way, the outsole 150 and midsole 230 can be separated and / or assembled by various individuals, such as manufacturers and consumers, at various stages of the lifecycle of the footwear 100. Furthermore, the outsole 150 can be removed and recycled separately from the footwear 100 or the midsole 230. In addition, the outsole 150 can be removed by the consumer to be replaced with another outsole 150 having different performance characteristics, such as rigidity or cushioning at different locations along the forefoot area 108, midfoot area 110, heel area 112, lateral side 118, and midline side 116.

[0045] Referring to Figure 5, another embodiment of the connecting assembly 302 includes an outsole 306 and a midsole 310, shown in a partially assembled configuration. The midsole 310 and outsole 306 in Figure 5 are similar to those in the embodiment in Figure 4, and therefore equivalent reference numbers are used to indicate equivalent elements. As shown in Figure 5, the outsole 306 includes a rib 314 similar to the rib 174 in Figure 2. The rib 314 includes a plurality of ribs 314A, 314B, 314C, 314D, 314E, and 314F, which are sequentially labeled toward the heel direction, i.e., toward the heel. Thus, rib 314A is located furthest from the heel end 166, and rib 314F is located closest to the heel end 166. Similarly, the midsole 310 includes an opening 318 and a receptacle 322, similar to the midsole 230 in Figure 3. The midsole 310 in Figure 5 is provided with multiple openings, including openings 318A, 318B, 318C, 318D, 318E, and 318F, which are sequentially labeled from toe towards heel, i.e., towards the heel. Furthermore, the receptacles 322 are sequentially labeled from toe towards heel, i.e., towards the heel, and include multiple receptacles 322A, 322B, 322C, 322D, 322E, and 322F, corresponding to openings 318A, 318B, 318C, 318D, 318E, and 318F. For clarity, the ribs 314A-F, openings 318A-F, and receptacles 322A-F can be referred to individually or collectively as rib 314, opening 318, and receptacle 322, respectively.

[0046] Another method for assembling the outsole 306 to the midsole 310 can be seen from Figures 5 and 6, starting with aligning the heel end 166 of the outsole 306 with the heel end 246 of the midsole 310, thereby positioning the midsole 310 and outsole 306 in a "V" shape with the heel ends 166 and 246 aligned. Then, the most heel-side rib 314F is aligned with the most heel-side opening 318F and subsequently pressed against or against the flange 270 of the lower surface 238 of the midsole 310, passing through the opening 318F and the head 178 toward the receptacle 322F. In this process, as illustrated in Figure 5, the midsole 310 may be bent to facilitate the insertion of the rib 314F into the receptacle 322F, using the mechanical lever arm and elastic material properties of the midsole 310. Furthermore, once rib 314F is received inside receptacle 322F, the remaining ribs 314 align with the corresponding opening 318 and receptacle 322. Thus, the midsole 310 and outsole 306 together receive the remaining ribs 314 into the corresponding opening 318 and receptacle 322. In particular, the adjacent rib 314E is inserted into receptacle 322E, then rib 314D is inserted into receptacle 322D, and so on, until rib 314A is inserted into receptacle 322A, as illustrated in Figure 6. In this way, ribs 314A-F are received and connected to the receptacles 322A-F of the midsole 310 in a continuous connected progression from heel to toe, i.e., toward the toe. Finally, after the rib 314A is inserted into the receptacle 322A, the toe portion 162 of the outsole 150 (see Figure 6) fits into the groove 326 provided on the lower surface 238 of the midsole 310 (see Figure 5).

[0047] Figures 5 and 6 show an embodiment of the outsole 306 in which the toe portion 162 of the outsole 306 is located within the groove 326 of the midfoot region 110 of the footwear 100. Furthermore, as described above, the outsole 306 remains generally stationary during the assembly process in Figure 5 while the midsole 310 is bent, which may also be a feature of the different materials used to form the outsole 306 and the midsole 310. For this purpose, the outsole 306 is generally formed from a material having a higher density, and therefore higher rigidity, than the material of the midsole 310. In this way, the midsole 310 can provide the user with greater cushioning, while the outsole 306 can provide greater abrasion resistance and stability. Furthermore, since the outsole 306 can be separated from the midsole 310, the outsole 306 can be cleaned, replaced, and recycled separately from the footwear 100.

[0048] The outsole 306 and midsole 310 may be configured to provide the user of the footwear 100 with varying levels of comfort and performance characteristics. In some embodiments, the ribs 314 are configured to increase rigidity compared to the midsole 310. In some embodiments, the ribs 314 are configured to increase spring resistance in specific areas or locations of the sole structure 104 (see Figure 1) when compressed during use. In some embodiments, such as Figures 5 and 6, the ribs 314 are configured to improve the aesthetic features of the sole structure 104. To this end, the ribs 314 may be exposed through the central side 116 and lateral side 118 of the midsole 310, as shown in Figure 5. Alternatively, the ribs 314 may be hidden from the sides, as in the sole structure 104 of Figure 1.

[0049] Figure 7 shows another embodiment of the connecting assembly 334, including the outsole 338 and midsole 342 in an assembled configuration. In the illustrated embodiment, the outsole 338 includes ribs 346 similar to those in the embodiments of Figures 2 and 5. In particular, the outsole 338 is shown comprising a plurality of ribs 346. Furthermore, the midsole 342, shown in plan view, comprises a plurality of ridges 250 positioned within the midfoot region 110 and the forefoot region 108, and a rim 254 extending around the heel region 112 of the upper surface 234. The plurality of ridges 250 are configured to increase flexibility and reduce the overall weight of the midsole 342. Also, the heads 178 of the ribs 346A are partially exposed through holes 350 in the upper surface 234 of the midsole 342 as a result of the curvature at least partially formed by the rim 254 between the lateral side 118 and the central side 116 of the midsole 342. To this end, the holes 350 in the midsole 342 are configured to allow air movement, thereby improving the moisture-regulating and breathability of the footwear 100.

[0050] Referring to Figure 7, the outsole 338 is configured to extend from the lateral side 118 of the midsole 342, and in particular, each head 178 of the rib 346 of the outsole 338 protrudes or extends from the lateral side 118 of the midsole 342. In this way, the rib 346 of the outsole 338 may be visible from the side of the footwear 100 to impart specific performance characteristics and / or to create a visual impression. In some embodiments, the head 178 includes a peripheral flange 354 that extends outward as a thin section of material. In some embodiments, the rib 346 may provide specific lateral or central stability characteristics, among other desirable characteristics, to support changes in direction, prevent ankle rolling or rotation, or allow for greater traction control. Furthermore, the visual impression of the footwear 100 may be customized by the rib 346 of the outsole 338 to express creativity or information. For example, the heads 178 of one or more ribs 346 may be molded as alphabetical or numeric symbols so that the footwear 100 can display the user's name, team name, phrase, logo, brand, symbol, or even a jersey number. In some examples, one or more of the ribs 346 may be provided in a specific shape or color corresponding to a stiffness grade, for example, red may indicate greater stiffness and blue may indicate lower stiffness. Furthermore, the ribs 346 may extend outward from the midsole 342 at various distances from one another, as shown in Figure 7.

[0051] Figure 8 shows another embodiment of a connecting assembly 358 including an outsole 362 and a midsole 366 in an assembled configuration. In the illustrated embodiment, the outsole 362 includes a number of ribs 370 that are recessed, for example, inwardly offset, from the central side 116 of the midsole 366 into the corresponding receptacle 374. Specifically, the connecting assembly 358 is shown from a bottom perspective view, and the inner surface 266 of each receptacle 374 is visible as a result of the recessed position of the ribs 370 within the receptacle 374. Furthermore, the receptacle 374 is open and exposed to the central side 116 of the midsole 366. Similar to the embodiment in Figure 7, the ribs 370 are exposed from the central side 116 of the midsole 366 to impart certain performance characteristics and / or create a visual impression, as described above. The ribs 370 may also be exposed from the side side 118.

[0052] The connecting assemblies 286, 302, 334, and 358 are provided as lock-and-key configurations configured to interlock with a particular midsole by a specific arrangement or configuration of projections and / or ribs that detachably connect a particular outsole to a gap and / or receptacle. To this end, the connecting assemblies 286, 302, 334, and 358 may be formed by inverting a component having, for example, projections or ribs extending from the midsole and a gap or receptacle formed on the outsole, or any combination thereof. Furthermore, the connecting assemblies 286, 302, 334, and 358 can be held and / or secured using additional fasteners such as magnetic elements, hook-and-loop fasteners, buckles, zippers, and rail fasteners.

[0053] The connecting assemblies 286, 302, 334, and 358 may further offer additional features compared to conventional sole assemblies, such as the ability to remove the outsole for continued indoor wear of footwear. For example, instead of the user removing the entire footwear, the outsole, which may be relatively dirty and / or contaminated from outdoor use, can be easily removed, allowing the footwear to continue to be worn indoors with the cushioning properties of a relatively clean midsole that is relatively less dirty and / or contaminated compared to a removable outsole. Such indoor use of footwear with the outsole removed may be beneficial in a variety of applications, such as quicker entry and exit from residential or commercial buildings by the simple action of attaching or removing the outsole.

[0054] In addition, connecting assemblies 286, 302, 334, and 358 can reduce the need for additional pairs or sets of footwear by extending the versatility of footwear suitable for various uses. For example, the midsole and upper may be configured for use in several different activities, including, among others, running, walking, basketball, tennis, weightlifting, golf, and soccer, while the outsole may be configured for use in only one or fewer of such activities. In some examples, the outsole may be equipped with specific ground engagement elements such as cleats or spikes suitable for a particular activity, while the midsole and upper may be configured to be universal, i.e., suitable for activities beyond those specific outsoles.

[0055] Figure 9 shows a schematic top view of another embodiment of the outsole 404, similar to the outsole 150, such that the outsole 404 includes a top surface 154 extending from the toe end 162 to the heel end 166. In the illustrated embodiment of Figure 9, the outsole 404 is depicted for illustrative purposes with a longitudinal plane L and a central plane C extending through it. The outsole 404 includes a first attachment area 408 in the forefoot region 108, a second attachment area 412 in the midfoot region 110, and a third attachment area 416 in the heel region 112. More or fewer attachment areas may be located at various positions on the outsole 404. In comparison, the outsole 150 includes an outsole attachment area 194 in the heel region 112, as shown in Figure 2. Returning to Figure 9, the first mounting region 408 is illustrated by a virtual first boundary line 420, the second mounting region 412 by a virtual second boundary line 424, and the third mounting region 416 by a virtual third boundary line 428. The first plurality of ribs 432 are located within the first boundary line 420 of the first mounting region 408. The first boundary line 420 extends along the periphery defined by the first plurality of ribs 432, and one or more of the ribs 432 may be located on or coincide with the first boundary line 420. In some embodiments, one or more of the ribs 432 are spaced apart from the first boundary line 420 within the first mounting region 408.

[0056] In the illustrated embodiment of Figure 9, the first plurality of ribs 432 are provided in various sizes and shapes, as well as in various configurations. In particular, the first plurality of ribs 432 include ribs 432A that are thin, linearly projecting, and are continuously spaced on the outsole 404 between the lateral side 118 and the central side 116, in an outward-to-inward direction, i.e., parallel to the central plane C. The first boundary line 420 is in contact with the ribs 432A at its opposing ends such that the ribs 432A coincide with and are adjacent to the first boundary line 420, although other configurations are possible. Furthermore, the first plurality of ribs 432 include ribs 432B in the form of thin, linear projections that extend continuously at an angle to the central plane C, adjacent to and coinciding with the first boundary line 420, and having opposing ends. The ribs 432B are also arranged so as to be spaced outwards from the center to the sides. Furthermore, the first set of ribs 432 includes ribs 432C in the form of rectangular projections that continuously extend substantially parallel to the central plane C, having opposite ends that coincide with and are adjacent to the first boundary line 420. Ribs 432C are relatively thicker horizontally, i.e., parallel to the longitudinal plane L, than ribs 432A and 432B. The first set of ribs 432 also includes ribs 432D, which take the form of generally rectangular projections having intersecting members between the opposite ends of these ribs 432D. The ribs 432 are spaced apart from the first boundary line 420 and positioned at an angle with respect to the central plane C. Thus, the first set of ribs 432 includes ribs with varying thickness relative to each other, ribs positioned so as to vary in angle relative to each other, and ribs of different shapes and sizes.

[0057] In addition, the top surface 154 is shown to include texture, i.e., local deviations from a perfectly flat plane, within the first mounting area 408 and therefore within the first boundary line 420. In some embodiments, the top surface 154 may include various texture properties, such as roughness, undulation, and shape, among others. The top surface 154 can be textured by various methods, such as grinding, cutting, wrapping, blasting, sanding, honing, milling, reaming, laser processing, additive manufacturing, etc. In any case, the top surface 154 may be textured to increase friction during engagement with an outer surface such as a midsole. Furthermore, the top surface 154 may include a layer, substrate, or sheet of a different material from the outsole 404, providing similar friction or engagement properties.

[0058] Referring further to Figure 9, the second mounting region 412 includes a second set of ribs 436 of various sizes and shapes, as well as various configurations. In particular, the second set of ribs 436 includes a set of ribs 436A in the form of discrete, square projections arranged in a generally linear array, located apart between the central side 116 and the lateral side 118. One or more of the ribs 436A coincide with and are adjacent to the second boundary line 424, and one or more of the ribs 436A are located at a distance from the second boundary line 424 within the second mounting region 412. The set of ribs 436A is arranged asymmetrically with respect to the longitudinal plane L, and although other configurations are possible, the set of ribs 436A is offset toward the central side 116. In addition, the second set of ribs 436 includes a set of ribs 436B in the form of discrete, square projections located within the midfoot region 110 and intersecting the central plane C. Therefore, the set of ribs 436B are located along the central plane C, which is coplanar with each other. Furthermore, the set of ribs 436B are separated by a longer distance than the set of ribs 436A are separated by. That is, the set of ribs 436B is arranged such that one rib 436B is adjacent to the central side 116 and the other rib 436B is adjacent to the lateral side 118. Furthermore, the second set of ribs 436 includes ribs 436C in the form of an array of six discrete square projections arranged linearly between the lateral side 118 and the central side 116. The ribs 436C are spaced at uniform distances from each other, and the array of ribs 436C is approximately symmetrical with respect to the longitudinal plane L. In addition, the ribs 436C are generally smaller square projections than those of ribs 436A and 436B. Therefore, the second set of ribs 436 includes ribs arranged in different configurations and spacings, ribs arranged in asymmetrical and symmetrical relationships, ribs provided as separate sets or arrays of protrusions, and ribs of different shapes, sizes, and quantities.

[0059] Continuing to refer to Figure 9, the third mounting region 416 includes a third set of ribs 440 of various sizes and shapes, as well as various configurations. In particular, the third set of ribs 440 includes a set of ribs 440A in the form of discrete, substantially elliptical or circular projections of different sizes and shapes from one another. Furthermore, the set of ribs 440A is arranged asymmetrically with respect to the longitudinal plane L, and the ribs 440A are spaced at different distances from one another. Furthermore, at least one rib 440A is located further outward from the longitudinal plane L than the side 118, but at least one rib 440A may be located further outward from the longitudinal plane L than the center 116. At least one of the ribs 440A intersects the longitudinal plane L, but other configurations are possible. Furthermore, the third set of ribs 440 includes a set of ribs 440B in the form of discrete, substantially elliptical or circular projections arranged along a curved path 444 between the side 118 and the center 116. The curved path 444 is depicted as a convex curve with respect to the central plane L, but other configurations are possible. Furthermore, the third plurality of ribs 440 includes ribs 440C in the form of separate, substantially elliptical or circular projections of substantially different sizes. In particular, the maximum size of rib 440C may be more than twice the minimum size of rib 440C. Thus, the second plurality of ribs 436 includes ribs with different arrangements and spacings, ribs arranged in nonlinear or curved paths, ribs located on the lateral and / or central outer sides, and ribs of substantially different shapes, sizes, and quantities. In the illustrated embodiment, the third mounting region 416 extends outward from the lateral side 118. Furthermore, the upper surface 154 is shown to be generally smooth within the third mounting region 416.

[0060] Figure 10 shows a schematic side view of a part of another embodiment of the outsole 500. In particular, the outsole 500 includes a modification rib 504 having a head 508 in the form of a substantially elliptical, non-hollow member connected to a stem 512. The stem 512 defines the projection axis P and is positioned at an angle θ of less than 90 degrees, although other configurations are possible. The end of the head 508 is connected to the stem 512 such that the head 508 is offset from the projection axis P. Furthermore, the outsole 500 includes another modification rib 516 having a head 520 connected to a stem 524. In particular, the head 520 is molded to represent the number, namely 22. The head 520 may be molded to represent different numbers, alphabetical symbols, or various other symbols or shapes. Furthermore, the stem 524 is shown to comprise three parallel columnar members spaced apart from each other and positioned substantially perpendicular to the longitudinal plane L. In this way, the stem 524 includes gaps or voids above it. The stem 524 may, for example, provide specific cushioning and / or stiffness performance characteristics that may differ from those of the stem 512. For example, the stem 524 may provide initial deformation resistance after a spring-like reaction, such as when subjected to an impact caused by a user bearing nearly vertically downward weight, by having its three columnar members come into contact with each other before deformation and / or buckling as a result of the impact. In other words, the stem 524 may be configured to act as a nonlinear or linear damping spring whose resistance changes as a function of time measured after impact. Furthermore, the outsole 500 includes yet another modified rib 528 having a head 532 connected to the stem 536. In particular, the head 532 is located between the opposing ends of the stem 536, for example, about half the height of the stem 536, rather than at the end of the stem 536 opposite to the top surface 154 of the outsole 500. Furthermore, the head 532 is provided in the form of a projection extending substantially parallel to the longitudinal plane L and having a cross-sectional shape similar to a right triangle, but other configurations are also possible. For example, the head 532 may be radially arranged around a portion of the stem 536.In addition, the head 532 is positioned such that the angled side of the right triangle is further from the upper surface 154 of the outsole 500 than the straight side of the right triangle. In this way, the head 532 is configured to facilitate the installation of the midsole into the receptacle and to enhance retention within the receptacle, thereby resisting detachment or removal from the midsole.

[0061] Figure 11 shows a schematic perspective view of another embodiment of the outsole 600. In the illustrated embodiment, the outsole 600 includes an upper surface 604 opposite the bottom surface (or ground-facing surface) 608 and a clip 612 extending from the upper surface 604 at the heel end 124 of the outsole 600. Furthermore, the outsole 600 includes ribs 616 extending from the upper surface 604 and spaced apart from each other in the heel-to-toe direction, and the ribs 616 include a rear set 620 and a front set 624. The rear set 620 of the ribs 616 spans from the heel region 112 to the midfoot region 110 of the outsole 600, and the front set 624 of the ribs 616 spans from the midfoot region 110 to the forefoot region 108 of the outsole 600, with an arch cavity 628 located between the front set 624 and the rear set 620. In addition, the rib 616 extends continuously from the lateral side 118 to the central side 116 of the outsole 600. The rib 616 in the front set 624 is a plurality of ribs, including ribs 616A, 616B, 616C, 616D, 616E, 616F, and 616G, which are labeled sequentially from toe to heel, i.e., towards the heel. Similarly, the rib 616 in the rear set 620 is a plurality of ribs, including ribs 616H, 616I, 616J, 616K, 616L, and 616M, which are labeled sequentially towards the heel. Thus, rib 616A is located furthest from the heel end 124, and rib 616M is located closest to the heel end 124. In addition, the rib 616M is coupled to a clip 612 extending from the heel end 124, and a chamber 632 is formed between the rib 616M and the clip 612, which is in fluid communication with a pair of through holes 636, 640 formed in the clip 612 at the central side 116 and the lateral side 118, respectively. In the illustrated embodiment, the clip 612 is T-shaped and includes a pair of wings 644, 648 that curve from the heel end 124 to the central side 116 and the lateral side 118 of the outsole 600, respectively, and connect to the rib 616M.

[0062] Continuing to refer to Figure 11, and particularly to ribs 616A and 616B, each rib 616 includes a generally rounded or curved head 652 connected to a relatively thin base 656. For clarity, the head 652 and base 656 are labeled only on ribs 616A and 616B, but it will be understood that all ribs 616 include a head 652 and base 656. However, each rib 616 is independently configured to partially correspond to a specific location on the outsole 600. For example, ribs 616A and 616B, located inside the front set 624 and adjacent to the toe portion 122 of the outsole 600, are provided as substantially non-hollow members that are relatively thinner than the rest of ribs 616C-M. In contrast, ribs 616C-M are each substantially hollow tubular members. Furthermore, ribs 616A-M, with the exception of ribs 616L and 616M, progressively thicken towards the heel. Therefore, rib 616A is the thinnest of the ribs 616, rib 616K is the thickest, and each of ribs 616B-K is relatively thicker than the adjacent rib 616 at the toe position. Since the thickness of the ribs 616 corresponds at least partially to the amount of pressure and support experienced, as well as the amount of return energy and comfort provided by the ribs 616, it will be understood that the arrangement of the thicknesses of the ribs 616 on the outsole 600 is provided, among other things, to improve performance and comfort when worn by the user during various activities such as training, walking, and running. However, it will be understood that ribs 616 having different thickness arrangements are within the scope of this disclosure.

[0063] Referring to Figures 11 and 12, the rib 616G is hollow and includes a cavity 660 extending from the central side 116 to the lateral side 118 of the outsole 600. Furthermore, the cavity 660 communicates with a slot 664 extending through the base 656, the base 656 comprising a front leg 668 and a rear leg 672 spaced apart from each other across the slot 664 and connected to the head 652. Thus, the front leg 668 and the rear leg 672 of the base 656 define the slot 664 at least partially, and the head 652 defines the cavity 660 of the rib 616G at least partially. To clarify, the cavities 660, slots 664, foreleg 668, and hindleg 672 are labeled only with respect to rib 616G, but it will be understood that each of the ribs 616C-M is hollow and contains a cavity 660 extending from the lateral side 118 to the central side 116. Furthermore, it will be understood that each cavity 660 of the ribs 616C-L communicates with a slot 664 passing through the base 656. As shown in Figure 11, the head 652 is generally rounded, and therefore the cavities 660 are also generally rounded like the head 652, and similarly, the foreleg 668 and hindleg 672 of the base 656 gradually narrow away from the head 652, i.e., towards the upper surface 604 of the outsole 600, before widening at the upper surface 604. Furthermore, the slots 664 of each rib 616C-G of the anterior set 624 extend across the entire outsole, with each slot 664 of rib 616C-G opening into the outsole 600 and extending through the bottom surface 608 of the outsole 600. In addition, the slots 664 of each rib 616H-L of the rear set 620 extend through the entire outsole 600, including the bottom surface 608, at the central side 116 of the outsole 600, and substantially straddle the central side 116 and the lateral side 118 of the outsole 600. However, each slot 664 of rib 616H-L is interrupted by a traction strip 676 that curves along the lateral side 118 of the outsole 600, from the heel end 124 along the heel region 112 to the midfoot region 110, along the bottom surface 608 of the outsole 600. Therefore, the traction strip 676 straddles the lateral heel portion of each slot 664 of ribs 616H-L.In addition, multiple traction pads 680 are positioned on the bottom surface 608 of the outsole 600 along the central side 116 from the heel area 112 to the forefoot area 108, and along the lateral side 118 within the forefoot area 108.

[0064] Referring further to Figures 11 and 12, the ribs 616 are spaced apart from each other so as to form a gap 684 between them, across the upper surface 604 of the outsole 600. The gap 684 is sized and shaped according to the ribs 616 such that the gap 684 is defined by the size or shape of the ribs 616 and by the spacing, i.e., distance, between each of the ribs 616. The ribs 616 are spaced apart by different distances, such as the relatively large distance between rib 616F and rib 616G. In the illustrated embodiment, the toe flap 688 narrows as it extends to the toe direction of the foremost rib 616A, i.e., measured from the side toward the center. Furthermore, the illustrated embodiment includes a notch 692 formed between adjacent ribs 616 and provided in the form of a curved elliptical recess along the lateral side 118 and central side 116 of the outsole 600.

[0065] Figures 13 and 14 show perspective and schematic views of another embodiment of the midsole 696. The midsole 696 includes an upper surface 700 opposite the bottom surface 704, a rim 708 extending along the periphery 712 of the upper surface 700, and a plurality of openings 716 extending through the bottom surface 704 toward the upper surface 700. In addition, each of the openings 716 is connected to a receptacle 720 configured to receive one of the ribs 616 of the outsole 600, as shown in Figure 15, to form a connecting assembly 724. Referring to Figures 13 and 14, the openings 716 of the midsole 696 include openings 716A-M that are continuously and sequentially labeled toward the heel, and receptacles 720A-M corresponding to the openings 716A-M, also continuously toward the heel. Furthermore, the openings 716A-G and receptacles 720A-G comprise anterior groups 728 of the midsole 696 that span within the forefoot region 108. Similarly, the openings 716H-M and receptacles 720H-M constitute a posterior group 732 of the midsole 696 that span within the heel region 112. An arch support 736 is positioned within the midfoot region 110 of the midsole 696, separating the anterior group 728 from the posterior group 732. It will also be understood that the midsole 696 includes a plurality of flanges 740A-M that at least partially define and connect the openings 716A-M and receptacles 720A-M. For example, flanges 740A and 740B connect and define opening 716A and receptacle 720A, flanges 740B and 740C connect and define opening 716B and receptacle 720B, and so on. Furthermore, the arch support 736, opposite flange 740G, connects and defines opening 716G and receptacle 720G in the anterior group 728 of the midsole 696, and the arch support 736, also opposite flange 740H, connects and defines opening 716H and receptacle 720H ​​in the posterior group 732 of the midsole 696. Generally, each of the flanges 740 and arch support 736 curves inward so that it is thicker near the bottom surface 704 and thinner towards the top surface 700 of the midsole 696.

[0066] As shown in Figures 13 and 14, the receptacles 720 and openings 716 are available in various sizes and shapes. For example, receptacles 720A and openings 716A are relatively thinner when measured from heel to toe parallel to the longitudinal axis L and narrower when measured from the side toward the center than the adjacent openings 716B and receptacles 720B. Also, openings 716B and receptacles 720B are thinner and narrower than the adjacent openings 716C and receptacles 720C. Thus, flanges 740A-M are available in various sizes and shapes, in particular, in various thicknesses and widths. Furthermore, the arch supports 736 are relatively thicker than the respective flanges 740A-M and are generally T-shaped, as is most commonly seen in Figure 14. Referring to Figure 13, the rearmost flange 740M is equipped with a fixing mechanism in the form of a first block 744 and a second block 748 at the heel end 124 of the midsole 696. The first block 744 is located on the central side 116 of the midsole 696, and the second block 748 is located on the lateral side 118 of the midsole 696. Thus, the first block 744 and the second block 748 are spaced apart from each other and separated by a longitudinal axis L. Furthermore, the first block 744 and the second block 748 are positioned closer to the bottom surface 704 of the midsole 696 than to the top surface 700. In the illustrated embodiment, the first block 744 and the second block 748 are substantially elliptical projections extending outward from the heel end 124 of the midsole 696. In particular, the first block 744 extends outward from the central side 116 of the flange 740M, and the second block 748 extends outward from the lateral side 118 of the flange 740M, although other configurations are possible. In addition, several bumps 752 in the form of curved elliptical projections are arranged along the lateral side 118 and central side 116 of the flange 740 and extend from the bottom surface 704 of the midsole 696. In the illustrated embodiment, the bumps 752 are spaced apart from each other and span the heel region 112, the midfoot region 110, and the forefoot region 108. For clarity, in Figure 14 only the bumps 752 along the lateral side 118 are labeled.

[0067] Referring to Figures 15 and 16, the outsole 600 and midsole 696 are each provided with a connecting assembly 724 configured to be detachably attached as part of a footwear sole structure 104. For clarity, the ribs 616 of the outsole 600 are referred to as the front set 624 and the rear set 620, and similarly, the opening 716, receptacle 720, and flange 740 of the midsole 696 are referred to as the front group 728 and the rear group 732. Thus, Figure 15 shows a connecting assembly 724 in an assembled configuration, configured such that the front set 624 of the ribs 616 is detachably coupled to the front group 728 of the receptacle 720, the rear set 620 of the ribs 616 is detachably coupled to the rear group 732 of the receptacle 720, and the arch support 736 is configured to fit into the arch cavity 628. In some embodiments, the outsole 600 and midsole 696 are bent to be detachably joined to each other in a manner similar to that described in relation to Figure 5, but other configurations are also possible. In some embodiments, only one of the outsole 600 and midsole 696 is bent during assembly to form a connecting assembly 724. The connecting assembly 724 can be assembled by pressing the outsole 600 and midsole 696 against each other substantially vertically, i.e., perpendicular to the longitudinal direction defined by the longitudinal axis L, so that no bending occurs.

[0068] Furthermore, as shown in Figure 16, the clip 612 of the outsole 600 is configured to fit into the rearmost flange 740M of the heel end 124 of the midsole 696, and the first block 744 and the second block 748 are configured to extend through the respective through holes 636 and 640 formed in the clip 612 of the outsole 600. Thus, the flange 740M is received within the chamber 632, and the first block 744 and the second block 748 are received within the respective through holes 636 and 640 of the clip 612, thereby assisting in the positioning and / or alignment of the outsole 600 and the midsole 696 to form the connecting assembly 724. In addition, the flange 740M fits securely within the chamber 632 between the rib 616M and the clip 612, while the first block 744 and the second block 748 fit securely within the through holes 636 and 640, respectively. As a result, the first block 744, the second block 748, and the clip 612, through the through holes 636, 640, secure the heel end 124 of the connecting assembly 724 to prevent displacement during use, i.e., activities including rapid acceleration, high impact forces, continuous and repetitive compression and expansion, changes in direction or velocity, exposure to the outdoor environment, and any combination thereof. In addition, when the connecting assembly 724 is assembled, the notch 692 of the outsole 600 is configured to receive the bump 752 of the midsole 696 to further assist in alignment and secure the outsole 600 against displacement relative to the midsole 696.

[0069] Referring again to Figures 11-15, when the outsole 600 and midsole 696 are provided in an assembled configuration, the flange 740 of the midsole 696 is received within the corresponding gap 684 of the outsole 600, the rib 616 of the outsole 600 is received within the corresponding receptacle 720 of the midsole 696 through the corresponding opening 716, and the arch support 736 is received within the arch cavity 628 of the outsole 600. Furthermore, in the assembled configuration, the connecting assembly 724 may be joined using additional and / or alternative fasteners, such as hook-and-loop fasteners, magnetic elements, screw fasteners, twist-lock fasteners, and any other suitable fasteners that allow the outsole 600 to be detachably attached to the midsole 696, while preventing displacement in one or more directions, e.g., toe-side or heel-side, lateral and / or mid-side, and upward and / or downward. For example, the toe flap 688 of the outsole 600 and the foremost flange 740A of the midsole 696 are intended to be detachably fastened together using hook-and-loop fasteners (not shown). In addition, some or all of the front set 624 of the rib 616 and the receptacle 720 and the front group 728 of the opening 716 can be replaced with alternative fasteners such as hook-and-loop fasteners, among other configurations.

[0070] The upper 102 can be detachably attached to the sole structure 104 using any of the connecting assemblies 286, 302, 334, 358, and 724 disclosed herein. For example, the upper 102 may include an insole (not shown) which has a plurality of openings and receptacles and a plurality of ribs configured to be received when assembled as a modified version of the connecting assemblies 286, 302, 334, 358, and 724. Alternatively, the insole (not shown) of the upper 102 may include a plurality of ribs configured to be received within the opening 716 and receptacle 720 of the sole structure 104, such as an inverted configuration of the connecting assemblies 286, 302, 334, 358, and 724. Thus, the insole (not shown) may be provided as part of the upper 102 and / or permanently attached to the upper 102, and the upper 102 is detachably attached to the sole structure 104.

[0071] Any embodiment described herein can be modified to include any of the structures or methods disclosed in relation to different embodiments. Furthermore, this disclosure is not limited to the types of footwear specifically shown. In addition, aspects such as connecting assemblies of any of the embodiments of footwear disclosed herein can be modified to function with any type of footwear, clothing, or other athletic equipment.

[0072] As stated above, the present invention has been described in relation to specific embodiments and examples, but it will be understood by those skilled in the art that the present invention is not necessarily limited in this way, and that a number of other embodiments, examples, uses, modifications, and departures from embodiments are intended to be encompassed by the claims appended herein. The entire disclosure of each patent and publication referenced herein is incorporated herein by reference as each such patent or publication is incorporated herein by reference individually. Various features and advantages of the present invention are described in the following claims.

[0073] [Industrial applicability] Given the foregoing description, numerous modifications to the present invention will be apparent to those skilled in the art. Therefore, this description should be interpreted as illustrative only and is presented for the purpose of enabling those skilled in the art to practice and use the invention. Exclusive rights to all modifications within the scope of the appended claims are reserved.

[0074] [Cross-reference with related applications] This application claims the benefit and priority of a U.S. provisional application, No. 63 / 282,018, filed on 22 November 2021, which is incorporated herein by reference in its entirety.

[0075] [References regarding federally funded research or development] Not applicable

[0076] [Sequence List] Not applicable

Claims

1. A first component having a plurality of ribs exposed through a central side and a side side, each rib of the plurality of ribs having a head connected to a base of the first component by a stem, the head being at least partially hollow and including a cavity extending partially or entirely through the head in a direction from the side side to the central side, the cavity extending into the stem and extending towards the base; a second component having a plurality of receptacles; A connecting assembly for footwear, wherein the plurality of ribs of the first component are configured to be received within the plurality of receptacles of the second component, and the cavity in each of the heads at least partially collapses and expands during assembly, thereby removably attaching the first component and the second component.

2. The coupling assembly of claim 1 , wherein at least one of the plurality of receptacles is exposed through a bottom surface of the second component.

3. The coupling assembly of claim 2 , wherein the plurality of receptacles are disposed between the lower surface and the upper surface of the second component.

4. The coupling assembly of claim 2 , wherein the plurality of receptacles extend continuously between a medial side and a lateral side of the second component.

5. The connecting assembly of claim 1 , wherein the plurality of ribs extend from a heel region to a midfoot region of the first component.

6. The linkage assembly of claim 1 , wherein the first component is formed of a different material than the second component.

7. The linkage assembly of claim 1 , wherein the first component is configured to fit within the second component.

8. The midsole and an outsole, the outsole includes a plurality of ribs configured to be received within a portion of the midsole; each rib of the plurality of ribs includes a head connected to a base of the outsole by a stem, the stem defining a projection axis extending along a center of the stem and through a center of the head; the projection axis of the stem extends at an angle of less than 90 degrees relative to the base; A sole structure for footwear, wherein each of the ribs is partially hollow and includes a cavity extending into the stem and toward the base.

9. The sole structure of claim 8 , wherein the plurality of ribs are disposed in a heel region.

10. The sole structure of claim 8 , wherein the plurality of ribs are exposed through a lateral side and a medial side of the midsole.

11. The sole structure of claim 8 , wherein one or more of the plurality of ribs includes a cavity.

12. The sole structure of claim 8 , wherein one or more of the plurality of ribs extend from a lateral side to a medial side of the midsole.

13. The sole structure of claim 8 , wherein each rib of the plurality of ribs is configured to releasably retain the outsole to the midsole.

14. a midsole having a flange including a securing mechanism; an outsole having a chamber at least partially defined by a plurality of ribs and a clip extending from a heel end; the flange is configured to be received within the chamber in an assembled configuration, and the securing mechanism is configured to releasably engage the clip in the assembled configuration; a through-hole disposed below and at least partially defined by a portion of the clip that encircles the flange from a medial side to a lateral side of the footwear, the through-hole configured to receive the securing mechanism in the assembled configuration; each rib of the plurality of ribs has a head connected to a base of the outsole by a stem; A connecting assembly for footwear, wherein the head is at least partially hollow and includes a cavity extending partially or completely through the head in a lateral to medial direction.

15. 15. The coupling assembly of claim 14, wherein the securing mechanism includes a first block extending from a lateral side of the flange and a second block extending from a central side of the flange.

16. 15. The connecting assembly of claim 14, wherein the clip extends from a top surface of the outsole and between a medial side and a lateral side of a heel-most rib of the plurality of ribs to at least partially define the chamber.

17. The coupling assembly of claim 16, wherein a slot extends through the base.

18. The linked assembly of claim 14 , wherein the outsole and the midsole are configured to flex away from one another during disassembly of the linked assembly.

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