CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims the benefit of U.S. Patent Application No.

15/061 ,196, filed March 4, 2016, which is incorporated by reference herein in its entirety.

BACKGROUND

[0002] The present disclosure is directed to an article of footwear and, more particularly, to an article of footwear and a sole structure having sensory node elements located at discrete locations.

[0003] Conventional articles of athletic footwear include two primary elements, an upper and a sole structure. The upper provides a covering for the foot that comfortably receives and securely positions the foot with respect to the sole structure. The sole structure is secured to a lower portion of the upper and is generally positioned between the foot and the ground. In addition to attenuating ground reaction forces (that is, providing cushioning) during walking, running, and other ambulatory activities, the sole structure may influence foot motions (for example, by resisting pronation), impart stability, and provide traction, for example. Accordingly, the upper and the sole structure operate cooperatively to provide a comfortable structure that is suited for a wide variety of athletic activities.

[0004] The upper is often formed from a plurality of material elements (for example, textiles, polymer sheets, foam layers, leather, and synthetic leather) that are stitched or adhesively bonded together to define a void or cavity on the interior of the footwear for comfortably and securely receiving a foot. More particularly, the upper forms a structure that extends over instep and toe areas of the foot, along medial and lateral sides of the foot, and around a heel area of the foot. The upper may also incorporate a lacing system to adjust fit of the footwear, as well as permit entry and removal of the foot from the void within the upper. In addition, the upper may include a tongue that extends under the lacing system to enhance adjustability and comfort of the footwear, and the upper may incorporate a heel counter or other stabilizing structure.

[0005] In some cases, cushioning provided by a sole structure, while attenuating ground reaction forces, may undesirably reduce sensory feedback by isolating the foot of the wearer from the ground contact. Therefore, there exists a need in the art for a sole structure that includes provisions for increasing sensory feedback to a foot of a wearer.

SUMMARY

[0006] In one aspect, the invention provides a sole structure for an article of footwear. The sole structure comprises a sole body portion. The sole body portion includes an outsole surface facing away from the article of footwear and an upper surface disposed opposite the outsole surface. The sole structure also comprises a plurality of sensory node elements disposed within apertures in the sole body portion. The apertures can be located within portions of at least a forefoot region, a midfoot region, and a heel region of the sole structure. Each of the plurality of sensory node elements includes a bottom surface configured to engage a ground surface and a top surface disposed opposite the bottom surface. The bottom surface of each of the sensory node elements extends above the outsole surface of the sole body portion when the sensory node element is in an uncompressed condition. Each of the plurality of sensory node elements are configured to move vertically within the apertures in the sole body portion so that the bottom surface of the sensory node element moves closer towards the outsole surface of the sole body portion when the sensory node element is in a compressed condition.

[0007] In another aspect, the invention provides an article of footwear. The article of footwear comprises an upper and a sole structure joined to the upper. The sole structure comprises a sole body portion. The sole body portion includes an outsole surface facing away from the article of footwear and an upper surface disposed opposite the outsole surface. The sole structure also comprises a plurality of sensory node elements disposed within apertures in the sole body portion. The apertures can be located within portions of at least a forefoot region, a midfoot region, and a heel region of the sole structure. Each of the plurality of sensory node elements includes a bottom surface configured to engage a ground surface and a top surface disposed opposite the bottom surface. The bottom surface of each of the sensory node elements extending above the outsole surface of the sole body portion when the sensory node element is in an uncompressed condition. The top surface of each of the sensory node elements extending towards an interior of the upper above the upper surface of the sole body portion when the sensory node element is in a compressed condition.

[0008] Other systems, methods, features and advantages of the invention will be, or will become, apparent to one of ordinary skill in the art upon examination of the following figures and detailed description. It is intended that all such additional systems, methods, features and advantages be included within this description and this summary, be within the scope of the invention, and be protected by the following claims.

BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The invention can be better understood with reference to the following drawings and description. The components in the figures are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the invention. Moreover, in the figures, like reference numerals designate corresponding parts throughout the different views.

[0010] FIG. 1 is an isometric view of an article of footwear including an exemplary embodiment of a sole structure having sensory node elements disposed at discrete locations;

[0011] FIG. 2 is a lateral side view of the article of footwear including an exemplary embodiment of a sole structure having sensory node elements disposed at discrete locations;

[0012] FIG. 3 is a medial side view of the article of footwear including an exemplary embodiment of a sole structure having sensory node elements disposed at discrete locations;

[0013] FIG. 4 is a bottom view of the exemplary embodiment of a sole structure having sensory node elements disposed at discrete locations;

[0014] FIG. 5 is a schematic top down view showing the locations of the sensory node elements with the remaining portion of the sole structure shown in outline;

[0015] FIG. 6 is a schematic top down view showing the locations of the sensory node elements in outline relative to a position of a foot disposed within the article of footwear;

[0016] FIG. 7 is an exploded schematic view of the article of footwear including an exemplary embodiment of a sole structure having sensory node elements disposed at discrete locations;

[0017] FIG. 8 is a representational cross-section view of the article of footwear including an exemplary embodiment of a sole structure having sensory node elements disposed at discrete locations;

[0018] FIG. 9 is a representational cross-section view of a foot within the article of footwear with sensory node elements in an uncompressed condition; [0019] FIG. 10 is a representational cross-section view of a foot within the article of footwear with sensory node elements in an compressed condition;

[0020] FIG. 1 1 is an enlarged cross-section view of a sensory node located within an aperture in the sole structure in an uncompressed condition;

[0021] FIG. 12 is an enlarged cross-section view of a sensory node located within an aperture in the sole structure in a compressed condition;

[0022] FIG. 13 is a representational view of an exemplary sensory node element;

[0023] FIG. 14 is a representational view of an exemplary sensory node element wobbling about axes;

[0024] FIG. 15 is an enlarged cross-section view of an alternate embodiment of a sensory node located within an aperture in the sole structure; and

[0025] FIG. 16 is a bottom view of an alternate embodiment of a sole structure having sensory node elements disposed in groups at discrete locations.

DETAILED DESCRIPTION

[0026] The following discussion and accompanying figures disclose an article of footwear and a sole structure for an article of footwear. Concepts associated with the article of footwear disclosed herein may be applied to a variety of athletic footwear types, including skateboarding shoes, performance driving shoes, soccer shoes, running shoes, baseball shoes, basketball shoes, cross-training shoes, cycling shoes, football shoes, golf shoes, tennis shoes, walking shoes, and hiking shoes and boots, for example. The concepts may also be applied to footwear types that are generally considered to be non- athletic, including dress shoes, loafers, sandals, and work boots. Accordingly, the concepts disclosed herein apply to a wide variety of footwear types.

[0027] For consistency and convenience, directional adjectives are employed throughout this detailed description corresponding to the illustrated embodiments. The term "longitudinal," as used throughout this detailed description and in the claims, refers to a direction extending a length of a sole structure, i.e., extending from a forefoot region to a heel region of the sole structure. The term "forward" is used to refer to the general direction in which the toes of a foot point, and the term "rearward" is used to refer to the opposite direction, i.e., the direction in which the heel of the foot is facing.

[0028] The term "lateral direction," as used throughout this detailed description and in the claims, refers to a side-to-side direction extending a width of a sole structure. In other words, the lateral direction may extend between a medial side and a lateral side of an article of footwear, with the lateral side of the article of footwear being the surface that faces away from the other foot, and the medial side being the surface that faces toward the other foot.

[0029] The term "horizontal," as used throughout this detailed description and in the claims, refers to any direction substantially parallel with the ground, including the longitudinal direction, the lateral direction, and all directions in between. Similarly, the term "side," as used in this specification and in the claims, refers to any portion of a component facing generally in a lateral, medial, forward, and/or rearward direction, as opposed to an upward or downward direction.

[0030] The term "vertical," as used throughout this detailed description and in the claims, refers to a direction generally perpendicular to both the lateral and longitudinal directions. For example, in cases where a sole structure is planted flat on a ground surface, the vertical direction may extend from the ground surface upward. It will be understood that each of these directional adjectives may be applied to an article of footwear, a sole structure, and individual components of a sole structure. The term "upward" refers to the vertical direction heading away from a ground surface, while the term "downward" refers to the vertical direction heading towards the ground surface. Similarly, the terms "top," "upper," and other similar terms refer to the portion of an object substantially furthest from the ground in a vertical direction, and the terms "bottom," "lower," and other similar terms refer to the portion of an object substantially closest to the ground in a vertical direction.

[0031] For purposes of this disclosure, the foregoing directional terms, when used in reference to an article of footwear, shall refer to the article of footwear when sitting in an upright position, with the sole facing groundward, that is, as it would be positioned when worn by a wearer standing on a substantially level surface.

[0032] Figures 1 through 10 illustrate an exemplary embodiment of an article of footwear 100, also referred to simply as article 1 00. In some embodiments, article of footwear 1 00 may include a sole structure 1 10 and an upper 1 20. For reference purposes, article 100 may be divided into three general regions: a forefoot region 10, a midfoot region 12, and a heel region 14, as shown in Figures 1 -6. Forefoot region 10 generally includes portions of article 100 corresponding with the toes and the joints connecting the metatarsals with the phalanges. Midfoot region 12 generally includes portions of article 100 corresponding with an arch area of the foot. Heel region 14 generally corresponds with rear portions of the foot, including the calcaneus bone. Article 100 also includes a lateral side 16 and a medial side 18, which extend through each of forefoot region 10, midfoot region 12, and heel region 14 and correspond with opposite sides of article 100. More particularly, lateral side 16 corresponds with an outside area of the foot (i.e., the surface that faces away from the other foot), and medial side 1 8 corresponds with an inside area of the foot (i.e., the surface that faces toward the other foot). Forefoot region 10, midfoot region 12, and heel region 14 and lateral side 16, medial side 18 are not intended to demarcate precise areas of article 100. Rather, forefoot region 1 0, midfoot region 1 2, and heel region 14 and lateral side 16, medial side 18 are intended to represent general areas of article 100 to aid in the following discussion. In addition to article 100, forefoot region 10, midfoot region 12, and heel region 14 and lateral side 16, medial side 18 may also be applied to sole structure 1 10, upper 120, and individual elements thereof.

[0033] In an exemplary embodiment, sole structure 1 10 is secured to upper 1 20 and extends between the foot and the ground when article 1 00 is worn. Upper 120 defines an interior void within article 100 for receiving and securing a foot relative to sole structure 1 10. The void is shaped to accommodate the foot and extends along a lateral side of the foot, along a medial side of the foot, over the foot, around the heel, and under the foot. Upper 120 may also include a collar that is located in at least heel region 14 and forms a throat opening 140. Access to the interior void of upper 120 is provided by throat opening 140. More particularly, the foot may be inserted into upper 1 20 through throat opening 140, and the foot may be withdrawn from upper 120 through throat opening 140.

[0034] In an exemplary embodiment, upper 1 20 may be formed from a bootie 122. Bootie 122 can be a one-piece element that entirely covers the top, sides and bottom of a foot of a wearer. The various portions of upper 1 20, including bootie 122, may be formed from one or more of a plurality of material elements (e.g., textiles, polymer sheets, foam layers, leather, synthetic leather) that can form the majority of upper 120 or portions can be stitched or bonded together to form upper 120 defining the void within article 100. In one embodiment, bootie 122 can form a majority of an exterior surface of upper 122. In other embodiments, upper 120 may be a conventional upper formed by multiple material element portions and can include edges that are attached to a sockliner or strobel sock to extend under the foot and close the interior void of the upper 120.

[0035] In some embodiments, article 100 can include a lacing system 130. Lacing system 130 extends forward from collar and throat opening 140 in heel region 14 over an area corresponding to an instep of the foot in midfoot region 12 to an area adjacent to forefoot region 10. Lacing system 130 includes various components configured to secure a foot within upper 120 of article 100 and, in addition to the components illustrated and described herein, may further include additional or optional components conventionally included with footwear uppers. In this embodiment, a lace 136 extends through various lace-receiving elements to permit the wearer to modify dimensions of upper 1 20 to accommodate the proportions of the foot. In the exemplary embodiments, lace-receiving elements are configured as a plurality of lace apertures 1 34. More particularly, lace 136 permits the wearer to tighten upper 1 20 around the foot, and lace 136 permits the wearer to loosen upper 120 to facilitate entry and removal of the foot from the interior void (i.e., through ankle opening 140). Lace 136 is shown in FIG. 1 , but has been omitted from the remaining Figures for ease of illustration of the remaining components of article 100.

[0036] As an alternative to plurality of lace apertures 134, upper 120 may include other lace-receiving elements, such as loops, eyelets, and D-rings. In addition, upper 120 includes a tongue 124 that extends over a foot of a wearer when disposed within article 1 00 to enhance the comfort of article 100. In this embodiment, tongue 1 24 is integrally formed with bootie 122. In other embodiments, tongue 1 24 may be an individual component that may move within an opening between opposite lateral and medial sides of upper 120.

[0037] In one embodiment, lacing system 130 may further include a support wrap 1 32. Support wrap 132 extends over the outside of bootie 122 and includes lace apertures 1 34. In exemplary embodiments, support wrap 132 extends between a lower area of upper 120 where upper 1 20 and sole structure 1 10 are joined and a lacing area where lace 1 36 extends through lace apertures 1 34 over the top of upper 120. With this configuration, lace apertures 134 of lacing system 130 may be provided on support wrap 132 separate from bootie 122 to allow bootie 122 to have a construction without any lace- receiving elements. In other embodiments, one or more lace-receiving elements, including lace apertures 134, may be located instead, or additionally, on bootie 122 of upper 120.

[0038] In some embodiments, sole structure 1 10 may include multiple components, which may individually and/or collectively provide article 1 00 with a number of attributes, such as support, rigidity, flexibility, stability, cushioning, comfort, reduced weight, traction, and/or other attributes. In various athletic activities, execution of skills involved in such athletic activities may be performed based on precise placement and interaction of the wearer's feet with the surface on which the activities are performed. Therefore, typical cushioning found in the sole structure of footwear used in such activities may reduce the amount of sensory feedback that the wearer can feel from the surface through the soles of the footwear. This can adversely affect their ability to position their feet and interact with the surface on which the activity is performed. For example, in sports and other athletic activities where weight transfer or cutting motions are commonly performed, sensory feedback to the wearer's foot about the condition of the surface and the amount of grip or force being applied at various locations across the wearer's foot can be helpful to the wearer.

[0039] In an exemplary embodiment, article 100 includes sole structure 1 1 0 having a sole body portion 1 12 and a plurality of sensory node elements 1 14. Plurality of sensory node elements 1 14 are located at discrete locations across various regions of sole structure 1 10 to provide sensory feedback to a wearer's foot at these discrete locations for assisting with athletic activities. Additionally, plurality of sensory node elements 1 14 can also provide a "push-off" surface for a wearer's foot within an interior of the article of footwear.

[0040] In exemplary embodiments, components of sole structure 1 10 may be formed of suitable materials for achieving the desired performance attributes. Sole body portion 1 12 may be formed of any suitable rubber, polymer, composite, and/or metal alloy materials. Exemplary materials may include thermoplastic and thermoset polyurethane, polyester, nylon, polyether block amide, alloys of polyurethane and acrylonitrile butadiene styrene, carbon fiber, poly-paraphenylene terephthalamide (para-aramid fibers, e.g., Kevlar®), titanium alloys, and/or aluminum alloys. In some embodiments, sole body portion 1 12 may be fashioned from a durable and wear-resistant material (for example, rubber). Other suitable materials will be recognized by those having skill in the art.

[0041] In some embodiments, plurality of sensory node elements 1 14 may be made of similar materials as sole body portion 1 1 2, including any of the materials suitable for sole structure 1 10, described above. In an exemplary embodiment, plurality of sensory node elements 1 14 may be made from a material that has a lower density or lesser hardness than sole body portion 1 12. For example, in some embodiments, plurality of sensory node elements 1 14 may be formed from a resilient polymer foam material, such as polyurethane (PU) or ethyl vinyl acetate (EVA). In other embodiments, plurality of sensory node elements 1 14 may be formed from a less dense rubber or polymer material than sole body portion 1 1 2. In still other embodiments, plurality of sensory node elements 1 14 and sole body portion 1 1 2 may be formed by the same material. [0042] FIGS. 1 -3 illustrate different views of article 100. As shown in FIG. 1 , sole structure 1 10 may include a plurality of sensory node elements 1 14. Sensory node elements 1 14 may be exposed through apertures 714 (shown in FIGS. 7-12) in sole body portion 1 12. Accordingly, a portion of plurality of sensory node elements 1 14 may be exposed to the exterior of article 100 and configured to contact the ground. In this embodiment, a bottom surface 1 15 of plurality of sensory node elements 1 14 is oriented to be the ground-engaging surface of plurality of sensory node elements 1 14. An opposite top surface 1 16 (shown in FIG. 5) of plurality of sensory node elements 1 14 is disposed facing away from the ground and towards the interior of upper 120.

[0043] In an exemplary embodiment, sole body portion 1 12 includes a lower outsole surface 1 13 that is also exposed to the exterior of article 100 and configured to contact the ground. An opposite upper surface 1 1 1 of sole body portion 1 12 is disposed facing away from the ground and towards the interior of upper 1 20, in a similar orientation as top surface 1 16 of plurality of sensory node elements 1 14.

[0044] In some embodiments, sole structure 1 10 includes plurality of sensory node elements 1 14 that are arranged selectively with different regions and/or portions of article 100 to provide sensory feedback at particular locations of the wearer's foot. In the exemplary embodiment shown in FIGS. 1 -12, plurality of sensory node elements 1 14 are located at various discrete locations within each of forefoot region 10, midfoot region 12, and heel region 14. Additionally, the locations of plurality of sensory node elements 1 14 may be varied between lateral side 16 and medial side 18. Referring to FIG. 2, lateral side 16 of article 100 is illustrated. In this embodiment, plurality of sensory node elements 1 14 are disposed primarily within midfoot region 12 and heel region 14 of sole structure 1 10. The remaining portion of sole structure 1 10 extending forward to the toe area of article 100 is formed by sole body portion 1 12.

[0045] Referring now to FIG. 3, medial side 18 of article 100 is illustrated. In this embodiment, plurality of sensory node elements 1 14 are disposed within forefoot region 10, heel region 14, and, at least partly, within midfoot region 12. In contrast with lateral side 16, plurality of sensory node elements 1 14 on medial side 18 extend further towards the toe area of article 100 in forefoot region 10 of sole structure 1 10. In addition, a group of plurality of sensory node elements 1 14 disposed in heel region 14 is separated and spaced apart from another group of plurality of sensory node elements 1 14 disposed in midfoot region 1 2 and forefoot region 10 by a gap formed by sole body portion 1 12. [0046] While the Figures illustrates an embodiment that provides sensory node elements disposed at discrete locations across substantially all regions of the foot, in some embodiments, sole structure 1 1 0 may include sensory node elements corresponding with different discrete locations for some portions of the foot and not others. For example, in some embodiments, sensory node elements may be provided only in forefoot region 10 of article 100. In other embodiments, sensory node elements may be provided in forefoot region 1 0 and heel region 14, but not in midfoot region 12 of article 100.

[0047] In different embodiments, the sizing of the sensory node elements may vary in order to provide desired performance for the activity for which article 1 00 is to be used. In an exemplary embodiment, each of the plurality of sensory node elements 1 14 may be substantially the same size. The size of plurality of sensory node elements 1 14 may be selected so as to be sufficiently large to provide sensory feedback to a wearer's foot. In one embodiment, plurality of sensory node elements 1 14 may have a diameter of approximately 1 inch. An exemplary range of diameters that are suitable for providing sensory feedback may be approximately from 0.75 inches to 1 .25 inches. In some cases, the diameter may be larger or smaller. In other embodiments, the size of each of the plurality of sensory node elements 1 14 may be different, depending on the sensitivity of the portion of the foot where sensory feedback is desired. For example, in locations where the foot is more sensitive, a smaller diameter sensory node element may be provided, whereas in locations where the foot is less sensitive, a larger diameter sensory node element can be provided to increase the ability of the sensory node element to effectively provide sensory feedback to the wearer's foot. Further, the density or proximity of sensory node elements to one another may also vary according to performance and sensitivity considerations.

[0048] FIG. 4 illustrates a bottom view of the underside of sole structure 1 10 of article 100. Sole structure 1 1 0 extends along a longitudinal length of article 100 between a toe end 400 located at the front of forefoot region 10 to a heel end 410 located at the rear of heel region 14. In an exemplary embodiment, plurality of sensory node elements 1 14 are located at various discrete locations within each of forefoot region 10, midfoot region 12, and heel region 14.

[0049] In some embodiments, a group of the plurality of sensory node elements 1 14 can be located within forefoot region 10 and extend along a medial perimeter edge on medial side 18. In this embodiment, the forefoot group of sensory node elements 1 14 includes a first sensory node element 210, a second sensory node element 21 1 , a third sensory node element 212, a fourth sensory node element 213, a fifth sensory node element 214, a sixth sensory node element 215, a seventh sensory node element 216, and an eighth sensory node element 217. As shown in FIG. 4, first sensory node element 21 0 and second sensory node element 21 1 are disposed near toe end 400 of sole structure 1 10 and seventh sensory node element 21 6 and eighth sensory node element 21 7 are disposed rearward near midfoot region 12.

[0050] In one embodiment, the group of plurality of sensory node elements 1 14 disposed in forefoot region 10 may be provided in pairs, with one sensory node element of each pair being located along the medial perimeter edge of sole structure 1 1 0 and the other sensory node element of the pair being located more inward towards a center of sole structure 1 10. For example, each of first sensory node element 210, third sensory node element 212, fifth sensory node element 214, and seventh sensory node element 21 6 are disposed along the medial perimeter edge, while second sensory node element 21 1 , fourth sensory node element 213, sixth sensory node element 215, and eighth sensory node element 217 are disposed inward from the medial perimeter edge and towards a center of sole structure 1 1 0.

[0051] In an exemplary embodiment, another group of the plurality of sensory node elements 1 14 can be located within midfoot region 1 2 and extend in a lateral direction across the sole structure 1 10. In this embodiment, the midfoot group of sensory node elements 1 14 includes a ninth sensory node element 220, a tenth sensory node element 221 , an eleventh sensory node element 222, a twelfth sensory node element 223, a thirteenth sensory node element 224, a fourteenth sensory node element 225, a fifteenth sensory node element 226, a sixteenth sensory node element 227, and a seventeenth sensory node element 228 that extend between the medial perimeter edge on medial side 18 to a lateral perimeter edge on lateral side 16. As shown in FIG. 4, ninth sensory node element 220 and fourteenth sensory node element 225 are disposed along the medial perimeter edge on medial side 18 of sole structure 1 10 and thirteenth sensory node element 224 and seventeenth sensory node element 228 are disposed along the lateral perimeter edge on lateral side 16 of sole structure 1 10.

[0052] In addition to the plurality of sensory node elements 1 14 in midfoot region 12 that extend laterally across sole structure 1 10, article 100 may also include some of the plurality of sensory node elements 1 14 in midfoot region 12 that extend rearwardly in the longitudinal direction towards heel end 410. In this embodiment, an eighteenth sensory node element 229 and a nineteenth sensory node element 230 extend rearwardly along the lateral perimeter edge towards heel end 41 0 in heel region 14. In addition, a twentieth sensory node element 231 may similarly extend along the lateral perimeter edge in heel region 14.

[0053] In an exemplary embodiment, another group of the plurality of sensory node elements 1 14 can be located within heel region 14 and extend in a lateral direction across the sole structure 1 1 0. In this embodiment, in addition to twentieth sensory node element 231 , the heel group of sensory node elements 1 14 includes a twenty-first sensory node element 240, a twenty-second sensory node element 241 , a twenty-third sensory node element 242, a twenty-fourth sensory node element 243, and a twenty-fifth sensory node element 244. Together, the twenty-first sensory node element 240, twenty-second sensory node element 241 , twenty-third sensory node element 242, twenty-fourth sensory node element 243, and twenty-fifth sensory node element 244 extend across sole structure 1 1 0 from medial side 1 8 to lateral side 16 at heel end 410 of heel region 14.

[0054] In one embodiment, the arrangement of various groups of plurality of sensory node elements 1 14 at discrete locations on sole structure 1 1 0 may separate sole body portion 1 1 2 into one or more areas, as shown in FIG. 4. For example, outsole surface 1 1 3 of sole body portion 1 12 may be exposed at a first area corresponding to lateral side 16 of forefoot region 10 and at a second area corresponding to a portion of midfoot region 12 and heel region 14 along the medial perimeter edge on medial side 18 of sole structure 1 10. In some embodiments, outsole surface 1 13 may further include additional features that assist with providing traction to sole structure 1 10. In one embodiment, a plurality of grooves 200 is disposed in outsole surface 1 13 of sole body portion 1 1 2. Plurality of grooves 200 can be depressions or recesses in sole body portion 1 1 2 that extend below surrounding outsole surface 1 13. In this embodiment, plurality of grooves 200 is arranged in an approximately concentric arrangement, with each groove being substantially evenly spaced apart from adjacent grooves. With this configuration, outsole surface 1 13 of sole body portion 1 12 may assist with providing traction or grip to article 100.

[0055] FIG. 5 illustrates an interior top down view of the inner side of sole structure 1 10 of article 100, with upper 1 20 and sole body portion 1 12 shown in outline. In some embodiments, each of plurality of sensory node elements 1 14 may have a top surface 1 16 located at a top end where each sensory node element has a smaller diameter than an opposite bottom end where bottom surface 1 15 is located. As will be further described below, top surface 1 16 of each of plurality of sensory node elements 1 14 is attached to a base layer 1 28 of upper 120. In this case, base layer 128 is a bottom portion of bootie 122 that extends under a foot of a wearer. In other cases, where article 100 includes other embodiments of upper 120, base layer 128 may be formed by a sockliner, a strobel sock, or an insole that encloses upper 120.

[0056] FIG. 6 illustrates an exemplary embodiment of sole structure 1 10 where the discrete locations of plurality of sensory node elements 1 14 corresponds approximately to a contact patch of a foot 600 of a wearer. That is, the contact patch of a foot represents the typical locations of contact between a bare foot of a wearer and a surface. In this embodiment, sole structure 1 10 has been provided with plurality of sensory node elements 1 14 disposed at locations that correspond to this contact patch so as to provide sensory feedback to foot 600 of a wearer at the same locations that would receive feedback when contacting the surface barefoot. With the configuration, sole structure 1 10 and plurality of sensory node elements 1 14 can provide a similar feel or sensory feedback of forces and topology of the surface as a bare foot in contact with the surface. This feedback may be used by a wearer when playing a sport or performing athletic activities. Additionally, plurality of sensory node elements 1 14 underlying the foot of the wearer can provide a "push off" surface for the foot within the interior of the article of footwear to assist with making athletic maneuvers or cutting motions.

[0057] In this embodiment, the forefoot group of plurality of sensory node elements 1 14, including first sensory node element 210, second sensory node element 21 1 , third sensory node element 212, fourth sensory node element 213, fifth sensory node element 214, sixth sensory node element 215, seventh sensory node element 21 6, and eighth sensory node element 217, corresponds generally to portions of a big toe of foot 600. The midfoot group of plurality of sensory node elements 1 14, including ninth sensory node element 220, tenth sensory node element 221 , eleventh sensory node element 222, twelfth sensory node element 223, thirteenth sensory node element 224, fourteenth sensory node element 225, fifteenth sensory node element 226, sixteenth sensory node element 227, and seventeenth sensory node element 228, corresponds generally to a ball and portions of the metatarsals of foot 600.

[0058] Similarly, the heel group of sensory node elements 1 14, including twenty- first sensory node element 240, twenty-second sensory node element 241 , twenty-third sensory node element 242, twenty-fourth sensory node element 243, and twenty-fifth sensory node element 244, corresponds generally with a heel of foot 600. Additionally, eighteenth sensory node element 229, nineteenth sensory node element 230, and twentieth sensory node element 231 extend rearwardly along the lateral perimeter edge and correspond to an outside lateral portion of foot 600 between the metatarsals and heel. With this arrangement, plurality of sensory node elements 1 14 of sole structure 1 10 can be configured to provide sensory feedback to foot 600 of a wearer at various discrete locations. Such sensory feedback may be used by the wearer when playing a sport or performing athletic activities.

[0059] FIG. 7 illustrates an exploded isometric view of article 100, including components of each of sole structure 1 10, upper 120, and lacing system 130. As shown in FIG. 7, sole structure 1 10 includes plurality of sensory node elements 1 14 and sole body portion 1 1 2. Sole body portion 1 12 includes apertures 714 that receive plurality of sensory node elements 1 14. Apertures 714 permit top surface 1 16 of plurality of sensory node elements 1 14 to be attached to upper 120 and allow for independent movement of plurality of sensory node elements 1 14 from sole body portion 1 12 when bottom surface 1 1 5 of plurality of sensory node elements 1 14 contact a surface.

[0060] In an exemplary embodiment, the arrangement of various groups of plurality of sensory node elements 1 14 at discrete locations on sole structure 1 10 may separate sole body portion 1 12 into one or more areas, as described above. In this embodiment, sole body portion 1 12 can include a first area 710 that corresponds to lateral side 16 of forefoot region 10 and a second area 71 2 that corresponds to a portion of midfoot region 12 and heel region 14 along the medial perimeter edge on medial side 18 of sole structure 1 10. In this embodiment, the midfoot group of plurality of sensory node elements 1 14 is disposed between first area 71 0 of sole body portion 1 12 and second area 712 of sole body portion 1 12.

[0061] In other embodiments, sole body portion 1 12 may remain a single piece with a lattice or other supporting structure used to join one or more areas in between where plurality of sensory node elements 1 14 are located. In addition, apertures 714 can each correspond to a single one of plurality of sensory node elements 1 14, or apertures 714 may be configured to receive multiple sensory node elements of plurality of sensory node elements 1 14. In some cases, a combination of apertures 714 may be used at different portions of sole structure 1 1 0 so that some apertures 714 include one sensory node element, while other apertures 714 include multiple sensory node elements.

[0062] Referring again to FIG. 7, in some embodiments, support wrap 132 of lacing system 130 may be provided by separate components for each of lateral side 1 6 and medial side 18 of upper 120. In this embodiment, support wrap includes a medial support portion 700 on medial side 1 8 and a lateral support portion 702 on lateral side 16. Together, medial support portion 700 and lateral support portion 702 form support wrap 132 and include plurality of lace apertures 134 for receiving lace 136. Support wrap 132 extends over the outside of bootie 122 and assists with fastening article 100 to a foot of a wearer. Support wrap 1 32, including each of medial support portion 700 and lateral support portion 702, may be joined to portions of sole structure 1 10, portions of upper 120, or both.

[0063] FIGS. 8-10 provide an exemplary representational illustration of sensory feedback provided to a foot of a wearer by sole structure 1 1 0 and plurality of sensory node elements 1 14. In some embodiments, bootie 122 forming upper 1 20 can be joined to sole body portion 1 12 and plurality of sensory node elements 1 14. As shown in FIG. 8, base layer 128 is a bottom portion of bootie 122 that is configured to extend under a foot of a wearer. Base layer 128 is joined to upper surface 1 1 1 of sole body portion 1 12 and also joined to top surface 1 16 of plurality of sensory node elements 1 14. In this embodiment, each sensory node element of plurality of sensory node elements 1 14 is shown within a respective aperture of apertures 714 in sole body portion 1 12. This arrangement allows top surface 1 16 of each of plurality of sensory node elements 1 14 to be attached to base layer 128 of bootie 122. Additionally, plurality of sensory node elements 1 14 are not attached or joined to sole body portion 1 1 2 so that plurality of sensory node elements 1 14 are permitted to wobble and independently move in at least a vertical direction within apertures 714 in sole body portion.

[0064] Referring now to FIG. 9, foot 600 is shown disposed with the interior void of upper 120 in article 100. The bottom of foot 600 is in contact with various portions of base layer 128. Article 100 is shown here in an uncompressed condition before article 100 is placed in contact with a ground surface 900. In this uncompressed condition, each of plurality of sensory node elements 1 14 has top surface 1 16 that is approximately flush or even with upper surface 1 1 1 of sole body portion 1 1 2. Plurality of sensory node elements 1 14, including first sensory node element 210, third sensory node element 212, fifth sensory node element 214, seventh sensory node element 216, ninth sensory node element 220, fourteenth sensory node element 225, twenty-first sensory node element 240, and twenty-fourth sensory node element 243, are shown within apertures 714 in sole body portion 1 1 2 in an uncompressed condition. [0065] As foot 600 wearing article 100 steps onto ground surface 900, article 100 is placed in a compressed condition. Referring now to FIG. 10, article 1 00 is shown being compressed by foot 600 against ground surface 900. In various cases, ground surface 900 may have one or more objects or uneven features. In this embodiment, ground surface 900 includes a first object 902 and a second object 904. First object 902 and second object 904 can be rocks, debris, or any other change in surface topology of ground surface 900, such as hills, mounds, divots, or depressions.

[0066] In this embodiment, when article 1 00 is in the compressed condition, one or more of plurality of sensory node elements 1 14 can transmit or relay sensory feedback regarding the condition or topology of ground surface 900 through sole structure 1 10 to foot 600. As shown in FIG. 10, first object 902 on ground surface 900 can push each of third sensory node element 212, fifth sensory node element 214, and seventh sensory node element 216 upwards through apertures 714 in sole body portion 1 12. This upwards vertical motion of third sensory node element 212, fifth sensory node element 214, and seventh sensory node element 216 causes top surface 1 1 6 to push base layer 128 upwards and contact foot 600 in the area corresponding to the location of first object 902 on ground surface 900. With this sensory feedback, a wearer can feel that there is an object or uneven area of ground surface 900 that is disposed under forefoot region 1 0 of article 100.

[0067] Similarly, when article 100 is in the compressed condition caused by foot 600, second object 904 on ground surface 900 can push each of twenty-first sensory node element 240 and twenty-fourth sensory node element 243 upwards through apertures 714 in sole body portion 1 12. This upwards vertical motion of twenty-first sensory node element 240 and twenty-fourth sensory node element 243 causes top surface 1 16 to push base layer 128 upwards and contact foot 600 in the area corresponding to the location of second object 904 on ground surface 900. With this sensory feedback, a wearer can feel that there is another object or uneven area of ground surface 900 that is disposed under heel region 14 of article 100.

[0068] By providing sole structure 1 10 of article 1 00 with plurality of sensory node elements 1 14 disposed at discrete locations across sole structure 1 10 that corresponds generally with a contact patch of a foot of a wearer, sensory feedback may be similarly provided to the respective portions of the foot and give the wearer information about the condition or topology of the ground surface in contact with sole structure 1 10 of article 100. Additionally, plurality of sensory node elements 1 14 can extend into the interior of article 100 and provide the wearer's foot with a "push off" surface for making athletic maneuvers or cutting motions.

[0069] FIGS. 1 1 and 12 illustrate the isolated motion of an exemplary one of plurality of sensory node elements 1 14 relative to sole body portion 1 12 and base layer 128 of bootie 122. Referring now to FIG. 1 1 , sensory node element 1 14 is located in aperture 714 of sole body portion 1 12 and moves at least vertically within aperture 714 independently from sole body portion 1 12. That is, while portions of sensory node element 1 14 may contact portions of sole body portion 1 12 when sensory node element 1 14 moves through aperture 714, sole body portion 1 12 and sensory node element 1 14 are not directly joined or attached to each other. With this arrangement, sensory node element 1 14 is able to wobble and move independently of sole body portion 1 12 and sensory node element 1 14 can be displaced vertically relative to outsole surface 1 13 of sole body portion 1 12.

[0070] In an exemplary embodiment, sole body portion 1 1 2 may have a first height H1 . First height H1 corresponds to the thickness of sole body portion 1 1 2 in the vertical direction extending between the foot of the wearer and the ground. Sensory node element 1 14 may have a second height H2 that corresponds to the height or thickness of the sensory node element in the same vertical direction. In this embodiment, second height H2 of sensory node element 1 14 is larger than first height H1 of sole body portion 1 1 2. With this arrangement, bottom surface 1 15 of sensory node element 1 14 extends above outsole surface 1 13 of sole body portion 1 12 such that bottom surface 1 1 5 of sensory node element 1 14 will generally initially contact the ground before outsole surface 1 1 3 of sole body portion 1 12.

[0071] In this embodiment, aperture 714 in sole body portion 1 1 2 may define an opening in sole body portion 1 12 that has a first width W1 . Sensory node element 1 14 is located within the opening defined by aperture 714 and has a second width W2. In some cases, where sensory node element 1 14 has a truncated cone shape, second width W2 may also be a diameter of sensory node element 1 14. Second width W2 of sensory node element 1 14 is smaller than first width W1 of the opening defined by aperture 714. With this arrangement, sensory node element 1 14 may fit within aperture 714 of sole body portion 1 12 and have at least some clearance with the sides of aperture 714.

[0072] In this embodiment, base layer 128 of bootie 1 22 includes an inner surface 1 1 00 facing towards the interior void of upper 120 and an outer surface 1 102 facing away from article 1 00 and towards the ground. Outer surface 1 1 02 of base layer 128 is attached to upper surface 1 1 1 of sole body portion 1 12 and also attached to top surface 1 1 6 of sensory node element 1 14. In FIG. 1 1 , sensory node element 1 14 is shown in an uncompressed condition so that top surface 1 16 is approximately even or flush with upper surface 1 1 1 of sole body portion 1 12. Similarly, in the area of bootie 1 22 shown in FIG. 1 1 , inner surface 1 100 of base layer 1 28 also has an approximately uniform or even height above both top surface 1 16 and upper surface 1 1 1 .

[0073] Referring now to FIG. 12, sensory node element 1 14 is shown in a compressed condition, for example, as described with reference to FIG. 10 above. In the compressed condition, bottom surface 1 15 of sensory node element 1 14 contacts ground surface 900 and bottom surface 1 15 of sensory node element 1 14 moves closer towards outsole surface 1 13 of the sole body portion 1 1 2. This movement also forces top surface 1 1 6 of sensory node element 1 14 upwards against outer surface 1 102 of base layer 128. Sensory node element 1 14 is permitted to move independently of sole body portion 1 12 through aperture 714, causing the localized area of base layer 128 that is attached to top surface 1 16 of sensory node element 1 14 to be moved upwards to form a raised inner surface 1 1 10 of base layer 128. Raised inner surface 1 1 10 can then contact the underside of a foot of a wearer to provide the sensory feedback about ground surface 900.

[0074] In this embodiment, raised inner surface 1 1 10 extends above inner surface 1 100 by a first distance D1 . First distance D1 is approximately equal to the difference between second height H2 of sensory node element 1 14 and first height H 1 of sole body portion 1 1 2. That is, the amount that top surface 1 16 of sensory node element 1 14 raises base layer 128 so that raised inner surface 1 1 10 extends above inner surface 1 1 00 when in the compressed condition is approximately the same as the amount that bottom surface 1 15 of sensory node element 1 14 extends above outsole surface 1 13 of sole body portion 1 12 when article 100 is in the uncompressed condition.

[0075] With this configuration, the amount of first distance D1 can be configured as desired based on selection of first height H1 , second height H2, or both. For example, in some cases, the distance of raised inner surface 1 1 10 of base layer 1 28 may be higher or lower to contact portions of the foot of the wearer. Selection of a larger or smaller first height H1 for sole body portion 1 12 and/or a smaller or larger second height H2 for sensory node element 1 14 can accommodate different distances needed for raised inner surface 1 1 10 to contact a foot.

[0076] FIGS. 13 and 14 illustrate an exemplary embodiment of a representative sensory node element of plurality of sensory node elements 1 14. In this embodiment, sensory node element 1 14 includes a top end 1300 where top surface 1 16 is located and a bottom end 1302 where bottom surface 1 1 5 is located. A body portion 1310 of sensory node element 1 14 extends between top end 1300 and bottom end 1302 and includes a side surface 131 2. In one embodiment, top end 1300 has a smaller diameter than the opposite bottom end 1302 so as to define an approximately truncated cone shape of sensory node element 1 14. In different embodiments, the distance between top end 1300 and bottom end 1302 can vary so as to vary the length of body portion 1310 and, thereby, the height of sensory node element 1 14. In an exemplary embodiment, bottom surface 1 1 5 of sensory node element 1 14 is convex. In one embodiment, bottom surface 1 15 of sensory node element 1 14 may be approximately hemispherical. In other embodiments, however, the shape of sensory node element 1 14 may vary, including, but not limited to triangular, cylindrical, spherical, round, and other geometric and non-geometric shapes. Additionally, in other embodiments, bottom surface 1 15 may be flat or uneven.

[0077] In this embodiment, the truncated cone shape of sensory node element 1 14 and convex bottom surface 1 15 allow sensory node element to wobble about at least two axes. As shown in FIG. 13, sensory node element 1 14 has a first axis 20 aligned approximately with an x-axis, a second axis 30 aligned approximately with a y-axis, and a third axis 40 aligned approximately with a z-axis. In some embodiments, sensory node element 1 14 can wobble or move about two or three of first axis 20, second axis 30, and/or third axis 40. In some cases, the x-axis may be associated with a lateral direction of article 100, the y-axis may be associated with a longitudinal direction of article 100, and the z-axis may be associated with a vertical direction of article 100. It should be understood, however, that the designation and selection of coordinate systems may be varied.

[0078] For example, as shown in FIG. 14, sensory node element 1 14 is shown wobbling about at least two axes so that the orientation of bottom surface 1 15 and top surface 1 16 is changed. Wobbling of sensory node element 1 14 can be caused by the transmission of forces or instability of the ground surface relative to article 1 00. With this configuration, sensory node elements 1 14 can wobble about at least two axes within apertures 714 in the sole body portion 1 12 to transmit sensory feedback to a foot of a wearer.

[0079] In previous embodiments, base layer 128 of bootie 122 is shown attached to top surface 1 16 of sensory node element 1 14 and upper surface 1 1 1 of sole body portion 1 12. In some cases, outer surface 1 102 of base layer 128 can be attached to upper surface 1 1 1 of sole body portion 1 12 up to the edge of the opening defining apertures 714. For example, as shown in FIGS. 1 1 and 12. In other cases, a predetermined amount of slack or give to accommodate the upwards vertical motion of top surface 1 16 of sensory node element 1 14 may be provided to base layer 1 28 by keeping a portion of outer surface 1 102 of base layer 128 unattached to upper surface 1 1 1 of sole body portion 1 1 2.

[0080] Referring now to FIG. 15, outer surface 1 102 of base layer 128 remains unattached to upper surface 1 1 1 of sole body portion 1 12 along a margin 1 500 located at a predetermined distance D2 surrounding apertures 714 in sole body portion 1 1 2. Margin 1500 permits base layer 128 to have a predetermined amount of slack or give to accommodate the upwards vertical motion of top surface 1 16 of sensory node element 1 14 when in the compressed condition. As shown in FIG. 15, margin 1 500 extending predetermined distance D2 around aperture 714, allows inner surface 1 100 of base layer 128 to rise to raised inner surface 1 1 1 0.

[0081] In some embodiments, base layer 128 may be formed from a flexible or stretchable layer or membrane, including materials made of elastic, rubber, woven or knit textiles, or other suitable flexible materials. In such cases, base layer 128 may stretch as needed to accommodate the upwards vertical motion of top surface 1 16 of sensory node element 1 14 when in the compressed condition. Additionally, such flexible or stretchable layer may be resilient to assist with forcing sensory node element 1 14 back to the uncompressed condition when force from a foot has been removed. However, in other embodiments, base layer 128 may need to accommodate additional displacement or increased sensitivity that may be lost if using a material that is too resilient. Additionally, in other embodiments, base layer 128 may be made from a non-stretchable or inflexible material. Accordingly, in these other embodiments, the alternate embodiment of attaching base layer 128 to upper surface 1 1 1 of sole body portion 1 12 using margin 1500, as described in reference to FIG. 15 above, may assist with upwards vertical motion of top surface 1 16 of sensory node element 1 14 when in the compressed condition.

[0082] In the previous embodiments, plurality of sensory node elements 1 14 have been described as being arranged in various groups at discrete locations across sole structure 1 1 0 of article 100. In these embodiments, each of the plurality of sensory node elements 1 14 is arranged to independently move. In an alternate embodiment, plurality of sensory node elements 1 14 may be arranged into one or more groups that include at least two sensory node elements that are configured to move together as a unitary element. Referring now to FIG. 16, an alternate embodiment of a sole structure 1 610 having a plurality of sensory node elements 1 14 disposed in groups at discrete locations is illustrated. Each group includes two or more sensory node elements 1 14 that are configured to move together as a unitary element.

[0083] As shown in FIG. 16, a first unitary group 1620 is disposed in forefoot region 10 along the medial perimeter edge on medial side 18, a second unitary group 1630 is disposed in midfoot region 12 along medial perimeter edge on medial side 18, a third unitary group 1640 is disposed in midfoot region 12 along the lateral perimeter edge on lateral side 16, a fourth unitary group 1 650 is disposed along the lateral perimeter edge on lateral side 16 in portions of midfoot region 1 2 and heel region 14 extending towards heel end 41 0 of sole structure 1610, a fifth unitary group 1660 is disposed on lateral side 16 of heel region 14, and a sixth unitary group 1670 is disposed on medial side 18 of heel region 14.

[0084] In this alternate embodiment, each of first unitary group 1620, second unitary group 1630, third unitary group, fourth unitary group 1650, fifth unitary group 1660, and sixth unitary group 1670 include two or more of the plurality of sensory node elements 1 14 that are joined or attached together so as to move approximately simultaneously as a unitary element. With this arrangement, sensory feedback may be provided to general areas of a foot of a wearer. For example, in some cases, less sensory feedback may be required and more general sensory feedback regarding larger areas or regions of the foot and medial side 18 and lateral side 16 can be sufficient. It should be understood that the locations of the unitary groups of sensory node elements illustrated in FIG. 16 is merely exemplary. Other combinations and configurations could be selected based on desired sensory feedback, including combinations of individual sensory node elements and unitary groups of sensory node elements in the same embodiment.

[0085] While various embodiments of the invention have been described, the description is intended to be exemplary, rather than limiting and it will be apparent to those of ordinary skill in the art that many more embodiments and implementations are possible that are within the scope of the invention. Accordingly, the invention is not to be restricted except in light of the attached claims and their equivalents. Also, various modifications and changes may be made within the scope of the attached claims.