Adjustable element for article of footwear

Abstract

An article of footwear includes an adjustable element. The adjustable element includes a bladder defining an interior cavity. A compressible member is disposed within the interior cavity and is operable between an expanded state and a contracted state. The adjustable element also includes a locking strip including a first end anchored at a first location within the bladder and a second end disposed at an end of the locking strip opposite the first end. A lock accommodates the locking bar and is operable between a locked condition that restricts movement of the locking bar relative to the bladder and an unlocked condition that allows movement of the locking bar relative to the bladder.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This PCT international application claims priority to U.S. Application No. 18 / 484,356 filed on October 10, 2023, which claims priority under 35 U.S.C. §119(e) to U.S. Provisional Application No. 63 / 414,973 filed on October 11, 2022. The disclosures of these prior applications are considered part of the disclosure of the present application and are incorporated herein by reference in their entirety. Technical Field

[0003] The present disclosure relates generally to an article of footwear, and more particularly to an adjustable element for an article of footwear. Background Art

[0004] This section provides background information related to the present disclosure and is not necessarily prior art.

[0005] Footwear articles generally include an upper and a sole structure. The upper may be formed of any suitable material to accommodate, secure and support the foot on the sole structure. The upper may be fitted with laces, straps or other fasteners to adjust the fit of the upper around the foot. The bottom portion of the upper, which is adjacent to the bottom surface of the foot, is attached to the sole structure.

[0006] The sole structure generally includes a layered arrangement extending between the ground surface and the upper. For example, the sole structure may include a midsole and an outsole. The midsole is generally disposed between the outsole and the upper and provides cushioning for the foot. The midsole may include a pressurized fluid-filled chamber that elastically compresses under an applied load to cushion the foot by reducing ground reaction forces. The outsole provides wear resistance and traction with the ground surface and may be formed of rubber or other materials that impart durability and wear resistance and enhance traction with the ground surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] The drawings described herein are for illustrative purposes only of selected configurations and not all possible implementations, and are not intended to limit the scope of the present disclosure.

[0008] Figure 1A is a front perspective view of an example of an article of footwear according to the present disclosure, wherein the article of footwear is in a relaxed state;

[0009] Figure 1B yes Figure 1A A front perspective view of an article of footwear, wherein the article of footwear is in a collapsed state;

[0010] Figure 2A yes Figure 1Aa lateral side view of an article of footwear, wherein the article of footwear is in a relaxed state;

[0011] Figure 2B yes Figure 1B a lateral side view of the article of footwear in a collapsed state;

[0012] Figure 3A is along Figure 1A The line 3A-3A in Figure 1A A cross-sectional view of a footwear article;

[0013] Figure 3B is along Figure 1B The line 3B-3B in Figure 1B A cross-sectional view of a footwear article;

[0014] Figure 4 is a perspective view of an example of an adjustable element according to the present disclosure, wherein the compressible component has a lattice structure;

[0015] Figure 5 It has a locking assembly and a compressible part Figure 4 An exploded perspective view of an adjustable element;

[0016] Figure 6 yes Figure 5 a top perspective view of a locking assembly of FIG. 1 , wherein a locking element of the locking assembly is in a first configuration;

[0017] Figure 7 yes Figure 6 an exploded perspective view of a locking assembly of , wherein a biasing member of the locking assembly is positioned between a locking element of the locking assembly and a housing;

[0018] Figure 8 yes Figure 7 a bottom perspective view of a locking element of , wherein the locking element includes engagement features, each engagement feature having a biasing surface;

[0019] Fig. 9 yes Figure 7 A top perspective view of a housing and a biasing member;

[0020] Fig. 10A is along Figure 6 The line 10A-10A in Figure 6 A cross-sectional view of a locking assembly of , wherein the locking element is in a first configuration;

[0021] Fig. 10B yes Fig. 10A a cross-sectional view of a locking assembly of , wherein the locking element is in a second configuration;

[0022] Fig.11is another example of an adjustable element according to the present disclosure;

[0023] Fig.12 yes Fig.11 A perspective view of a locking assembly of , wherein the locking element is in a first configuration;

[0024] Fig.13 yes Fig.12 a bottom perspective view of a locking element of , wherein the biasing member has a first arm and a second arm integrally formed with the locking element;

[0025] Fig.14 yes Fig.11 A top perspective view of a housing of a locking assembly having a flange to accommodate Fig.13 a first arm and a second arm of a biasing member;

[0026] Fig.15A is along Fig.12 The line 15A-15A in Fig.12 A cross-sectional view of a locking assembly of , wherein the locking element is in a first configuration;

[0027] Fig. 15B yes Fig.12 a cross-sectional view of a locking assembly of , wherein the locking element is in a second configuration;

[0028] Fig.16 is a perspective view of another example of a locking assembly according to the present disclosure, wherein the locking element is in a first configuration;

[0029] Fig.17 yes Fig.16 An exploded perspective view of a locking assembly of FIG. 1 , wherein a biasing member is disposed between a locking element and a housing of the locking assembly;

[0030] Fig.18 yes Fig.16 a bottom perspective view of a locking element of , wherein the locking element defines an arcuate recess;

[0031] Fig.19 yes Fig.16 a top perspective view of a housing of a locking assembly of claim 1, wherein the housing defines a groove and an arcuate recess to accommodate a biasing member;

[0032] Fig. 20A is along Fig.16 The line 20A-20A in Fig.16 A cross-sectional view of a locking assembly of , wherein the locking element is in a first configuration;

[0033] Fig. 20B yes Fig.16 a cross-sectional view of a locking assembly of , wherein the locking element is in a second configuration;

[0034] Fig.21 is a cross-sectional view of the locking structure;

[0035] Fig.22A is a partially enlarged front view of an example of a locking structure according to the present disclosure, wherein the locking structure is in an unlocked state;

[0036] Fig. 22B yes Fig.22A A partially enlarged front view of a locking structure, wherein the locking structure is in a locked state;

[0037] Fig.23A yes Fig.22A A cross-sectional view of a locking structure of FIG. 1 , wherein the locking structure is in an unlocked state;

[0038] Fig. 23B yes Fig. 22B A cross-sectional view of a locking structure, wherein the locking structure is in a locked state;

[0039] Fig.24A is a cross-sectional view of an example of a locking structure according to the present disclosure, wherein the locking structure is in an unlocked state;

[0040] Fig. 24B yes Fig.24A A cross-sectional view of a locking structure, wherein the locking structure is in a locked state;

[0041] Fig.25 is a perspective view of a compressible member for use in conjunction with an adjustable element according to the present disclosure;

[0042] Fig.26A is a perspective view of an example of an adjustable element according to the present disclosure, wherein the compressible component has a corrugated structure and is in a relaxed state;

[0043] Fig.26B yes Fig.26A A perspective view of an adjustable element of the embodiment of the present invention, wherein the adjustable element is in a retracted state;

[0044] Fig.27A is a plan view of another example of an adjustable element for an article of footwear according to the present disclosure, wherein the adjustable element is in a relaxed state; and

[0045] Fig.27B yes Fig.27A A plan view of an adjustable assembly wherein the adjustable element is in a retracted state.

[0046] Corresponding reference numerals indicate corresponding parts throughout the several views. DETAILED DESCRIPTION

[0047] Example configurations will now be described more fully with reference to the accompanying drawings. Example configurations are provided so that the present disclosure will be thorough and will fully convey the scope of the present disclosure to those of ordinary skill in the art. Specific details, such as examples of specific components, devices, and methods, are set forth to provide a thorough understanding of the configurations of the present disclosure. It will be apparent to those of ordinary skill in the art that specific details need not be employed, that example configurations may be embodied in many different forms, and that the specific details and example configurations should not be interpreted as limiting the scope of the present disclosure.

[0048] The terms used herein are only for describing specific exemplary configurations and are not intended to be limiting. As used herein, the singular articles "a", "an", and "the" may also be intended to include plural forms unless the context clearly indicates otherwise. The terms "comprises / comprising / including" and "having" are inclusive and thus specify the presence of features, steps, operations, elements, and / or parts, but do not exclude the presence or addition of one or more other features, steps, operations, elements, parts, and / or groups thereof. The method steps, processes, and operations described herein should not be interpreted as necessarily requiring them to be performed in the particular order discussed or illustrated, unless they are specifically identified as an order of execution. Additional or alternative steps may be adopted.

[0049] When an element or layer is referred to as being "on another element or layer," "engaged to," "connected to," "attached to," or "coupled to" another element or layer, it may be directly on, engaged, connected, attached to, or coupled to the other element or layer, or there may be intermediate elements or layers. Conversely, when an element is referred to as being "directly on another element or layer," "directly engaged to," "directly connected to," "directly attached to," or "directly coupled to" another element or layer, there may be no intermediate elements or layers. Other words used to describe the relationship between elements should be interpreted in a similar manner (e.g., "between" versus "directly between," "adjacent" versus "directly adjacent," etc.). As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0050] The terms first, second, third, etc. can be used in this article to describe various elements, components, areas, layers and / or sections. These elements, components, areas, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, area, layer or section from another area, layer or section. Terms such as "first", "second" and other numerical terms do not imply order or sequence unless the context clearly indicates. Therefore, the first element, component, area, layer or section discussed below can be referred to as the second element, component, area, layer or section without departing from the teaching of the example configuration.

[0051] In one configuration, an adjustable element for an article of footwear includes: a bladder having an internal cavity; a compressible member disposed within the internal cavity and operable between an expanded state and a contracted state; a locking strip including a first end anchored at a first position within the bladder and a second end disposed at an end of the locking strip opposite the first end; and a lock that accommodates the locking strip and is operable between a locked state that restricts movement of the locking strip relative to the bladder and an unlocked state that allows movement of the locking strip relative to the bladder.

[0052] The adjustable element may include one or more of the following optional features. For example, the compressible component may include a channel extending therethrough, and the locking strip is slidably accommodated by the channel. In one configuration, the compressible component may be formed of foam. Optionally, the locking strip may include a longitudinal axis extending between a first end and a second end. The compressible component may move along the longitudinal axis when moving between an expanded state and a contracted state. Additionally or alternatively, the locking strip may include a first side and a second side, the second side being formed on a side of the locking strip opposite to the first side. The first side may include a first series of engagement features, the first series of engagement features being operable to engage the lock in a locked state. The lock may include a second series of engagement features, the second series of engagement features being operable to engage the first series of engagement features in a locked state and / or the lock may be biased to a locked state by a biasing member.

[0053] In one configuration, the compressible member can be moved from an expanded state to a contracted state by removing fluid from the interior cavity. The lock can be fixed relative to the bladder at a second position spaced apart from the first position. Optionally, when the compressible member moves from the expanded state to the contracted state, the effective length of the locking strip can decrease between the first position and the second position. The article of footwear can incorporate an adjustable element.

[0054] In another configuration, an adjustable element for a footwear article includes: a bladder having an internal cavity; a compressible member disposed within the internal cavity and operable between an expanded state and a contracted state; a locking strip including a first end anchored at a first position within the bladder and a second end disposed at an end of the locking strip opposite the first end; and a lock fixed relative to the bladder at a second position spaced apart from the first position and accommodating the locking strip, the lock being operable to selectively secure the position of the locking strip relative to the bladder in the locked state when the compressible member moves to a contracted state.

[0055] Optionally, the compressible component may include a channel extending therethrough. In this configuration, the locking strip may be slidably accommodated by the channel. The compressible component may be formed by foam. In one configuration, the locking strip may include a longitudinal axis extending between a first end and a second end, and the compressible component may move along the longitudinal axis when moving between an expanded state and a contracted state. Optionally, the locking strip may include a first side and a second side, the second side being formed on a side of the locking strip opposite to the first side, the first side may include a first series of engagement features, the first series of engagement features being operable to engage the lock in a locked state. The lock may include a second series of engagement features, the second series of engagement features being operable to engage the first series of engagement features in a locked state and / or the lock may be biased to a locked state by a biasing member. In another embodiment, the lock may rotate relative to the capsule. The compressible component may move from an expanded state to a contracted state by removing fluid from the internal cavity. Optionally, when the compressible component moves from an expanded state to a contracted state, the effective length of the locking strip may decrease between a first position and a second position. The footwear article may be combined with an adjustable element.

[0056] The details of one or more embodiments of the present disclosure are set forth in the accompanying drawings and the description below. Other aspects, features, and advantages will be apparent from the description, drawings, and claims.

[0057] refer to Figure 1A and Figure 1B , the article of footwear 10 includes an upper 100 and a sole structure 150. The footwear 10 may also include a front end 12 associated with a forward-most point of the footwear 10 and a rear end 14 corresponding to a rearward-most point of the footwear 10. The medial side 16 and the lateral side 18 correspond to opposite sides of the footwear 10, respectively, and extend from the front end 12 to the rear end 14. As used herein, the longitudinal direction refers to a direction extending from the front end 12 to the rear end 14, and the lateral direction refers to a direction transverse to the longitudinal direction and extending from the medial side 16 to the lateral side 18.

[0058] The article of footwear 10 may be divided into one or more regions. These regions may include a forefoot region 20, a midfoot region 22, and a heel region 24. The forefoot region 20 is associated with the phalanges and metatarsals of the foot. The midfoot region 22 may correspond to the arch area of ​​the foot, and the heel region 24 may correspond to the rear portion of the foot including the calcaneus.

[0059] The upper 100 includes an interior surface defining an interior space 102 and an ankle opening 104, which are configured to accommodate and secure a foot to support on a sole structure 150. The upper 100 and its components can be described as including various subcomponents or regions. For example, the upper 100 includes a toe cap 106 disposed at the front end 12 and extending from the medial side 16 to the lateral side 18 on the toe. A pair of quarter panels 108 extend from the toe cap 106 on opposite sides of the interior space 102 in the midfoot region 22. A throat 110 extends through the top of the upper 100 and is defined between the quarter panels 108 and extends from the toe cap 106 to the ankle opening 104 in the instep region. In the illustrated example, the throat 110 is closed, whereby a material panel extends between the opposite quarter panels 108 in the instep region to cover the interior space 102. Here, the panel of material covering throat 110 may optionally be formed from a material having a higher modulus of elasticity than the material forming quarter panel 108 .

[0060] The upper 100 of the article of footwear 10 can be further described as including a heel side panel 112 extending through the heel region 24 along the medial side 16 and the lateral side 18 of the ankle opening 104. A heel counter 114 can be included and wraps around the rear end 14 of the footwear 10 and connects the heel side panel 112. The throat 110, the heel side panel 112, and the uppermost edges of the heel counter 114 cooperate to form a collar 116 that defines the ankle opening 104 of the interior void 102.

[0061] The upper 100 may include an inner shoe lining 120 that defines an inner space 102. The inner shoe lining 120 may be formed by stitching or bonding together to form one or more materials of the inner space 102 by adhesive. Suitable materials for the upper 100 may include, but are not limited to, mesh fabrics, foam, leather, and synthetic leather. Materials may be selected and positioned to impart properties of durability, breathability, wear resistance, flexibility, and comfort. The example shoe lining 120 may be formed as an inner lining comprising a combination of one or more substantially inelastic or non-stretchable materials and / or one or more substantially elastic or stretchable materials disposed in different zones of the shoe lining 120, so that the footwear article 10 moves between a tensioned state and a relaxed state. One or more elastic materials may include any combination of one or more elastic fabrics, such as, but not limited to, spandex, elastic fiber, rubber, or neoprene. One or more inelastic materials may include any combination of one or more thermoplastic polyurethanes, nylon, leather, vinyl, or another material / fabric that does not impart elastic properties.

[0062] refer to Figures 1A to 3B, the upper 100 also includes an integrated adjustable element 200 attached to the lining 120, so that the adjustable element 200 can define a portion of the upper 100 of the footwear article 10. The adjustable element 200 includes a bladder 202, which forms an internal cavity 204 and has a compressible member 300 disposed therein. The port 132 is connected to the bladder 202 and is in fluid communication between the internal cavity 204 and the pressure source 130, as described in more detail below. It is generally contemplated that the pressure source 130 can be a vacuum pump integrated with the footwear 10. For example, the pressure source 130 can be integrated in the heel area 24 of the footwear article 10. Alternatively, the pressure source 130 can be a peripheral component disposed separately from the footwear 10, so that the pressure source 130 can be attached to and detached from the port 132. The pressure source 130 can include a vacuum line 134, through which a partial vacuum can be drawn or released to define a desired pressure within the internal cavity 204. The vacuum line 134 may be integrated within the medial side 16 and / or lateral side 18 of the article of footwear 10 (e.g., within the quarter panel 108), or may be located on the exterior of the upper 100 along the medial side 16 and / or lateral side 18. It is also contemplated that the pressure source 130 may include multiple vacuum lines 134 to connect various portions of the adjustable element 200 with the pressure source 130 to maximize the efficiency of the pressure source 130. The pressure source 130 may be automatically actuated by the wearer of the footwear 10 during the wearer's foot strike. For example, when the wearer is running, walking, or generally moving around in the footwear 10, the pressure source 130 is actuated to draw at least a partial vacuum within the interior cavity 204 of the bladder 202. The pressure source 130 may have a minimum vacuum pressure threshold, such that once the minimum threshold is met, the pressure source 130 may stop drawing a vacuum. The vacuum may remain within the interior cavity 204 until the wearer desires otherwise. Once the wearer desires to release the vacuum, the wearer may actuate pressure relief feature 136. Pressure relief feature 136 may be a button or other compressible feature that the wearer may press to return interior cavity 204 to the original interior pressure.

[0063] As discussed in more detail below, the adjustable element 200 is fluidly coupled to the pressure source 130 and is operable to adjust the compressible member 300 between a relaxed state and an expanded state ( Figure 2A ) and constricted or contracted state ( Figure 2B) between. For example, the compressible component 300 can be disposed within the internal cavity 204, and the expanded state can be defined by providing a first pressure within the internal cavity 204 (such as the original internal pressure before evacuation), and the contracted state can be defined by providing a second pressure within the internal cavity 204 (such as a pressure defined by at least a partial vacuum). It is generally contemplated that the first pressure of the internal cavity 204 can be greater than the second pressure. For example, the first pressure can be greater than or equal to the ambient pressure, and the second pressure of the internal cavity 204 can be less than the ambient pressure. Each of the first pressure and the second pressure can be dictated by the pressure source 130 to cause the compressible component 300 and the adjustable element 200 to expand and contract. The adjustable element 200 also includes a locking assembly 400 described below, which is integrated with the compressible component 300. The locking assembly 400 cooperates with the compressible component 300 to generally maintain the adjustable element 200 in the contracted state ( Figure 2B ), and the locking assembly 400 can be released to allow the adjustable element 200 to return to the relaxed state ( Figure 2A ).

[0064] In the illustrated example, adjustable element 200 includes a pair of side portions that extend from toe cap 106 to heel region 24 along medial side 16 and lateral side 18 on opposite sides of throat 110. Figure 1A As generally shown in , the side portions of adjustable element 200 each terminate along a respective medial side 16 and lateral side 18 of heel counter 114 .

[0065] refer to Figure 3A and Figure 3B , illustrates an adjustable element 200 with a locking assembly 400 disposed within a bladder 202. As described in more detail below, the locking assembly 400 includes a locking strip 402 and a locking element 404. The locking strip 402 is coupled to the bladder 202 via an elastic tether 405, which is configured to be in a relaxed state ( Figure 3A ) and the narrowed state ( Figure 3B ) between the upper 100 and the bladder 202. For example, when the upper 100 is in the narrowed state, the elastic tether 405 contracts and pulls the locking strip 402 through the locking element 404 to at least partially maintain the narrowed state of the upper 100. The adjustable element 200 includes an inner barrier layer 206a attached to the outer surface of the lining 120 and an outer barrier layer 206b that defines at least a portion of the outer surface of the upper 100. The inner surfaces of the barrier layers 206a, 206b are opposite to each other and are coupled to each other at discrete locations to form a peripheral seam 208 surrounding the interior cavity 204, thereby defining a chamber 210 of the bladder 202.

[0066] As used herein, the term "barrier layer" (e.g., barrier layers 206a, 206b) encompasses both monolayer films and multilayer films. In some embodiments, one or both of the barrier layers 206a, 206b are each produced (e.g., thermoforming or blow molding) from a monolayer film (monolayer). In other embodiments, one or both of the barrier layers 206a, 206b are each produced (e.g., thermoforming or blow molding) from a multilayer film (multiple sublayers). In either aspect, each layer or sublayer may have a film thickness ranging from about 0.2 microns to about 1 millimeter. In further embodiments, the film thickness of each layer or sublayer may range from about 0.5 microns to about 500 microns. In yet further embodiments, the film thickness of each layer or sublayer may range from about 1 micron to about 100 microns.

[0067] One or both of the barrier layers 206a, 206b may be independently transparent, translucent and / or opaque. As used herein, the term "transparent" for the barrier layer and / or chamber means that light passes through the barrier layer substantially in a straight line and an observer can see through the barrier layer. In contrast, for an opaque barrier layer, light does not pass through the barrier layer and cannot be clearly seen through the barrier layer at all. A translucent barrier layer falls between a transparent barrier layer and an opaque barrier layer because light passes through the translucent layer, but some of the light is scattered, making it impossible for an observer to see clearly through the layer.

[0068] Barrier layers 206a, 206b can each be produced from an elastomeric material including one or more thermoplastic polymers and / or one or more cross-linkable polymers. In one aspect, the elastomeric material can include one or more thermoplastic elastomeric materials, such as one or more thermoplastic polyurethane (TPU) copolymers, one or more ethylene-vinyl alcohol (EVOH) copolymers, and the like.

[0069] As used herein, "polyurethane" refers to copolymers (including oligomers) containing urethane groups (-N(C=O)O-). In addition to urethane groups, these polyurethanes can contain additional groups such as esters, ethers, ureas, allophanates, biuret, carbodiimide, oxazolidinyl, isocyanurate, uretdione, carbonate, and the like. In one aspect, one or more of the polyurethanes can be produced by polymerizing one or more isocyanates with one or more polyols to produce copolymer chains having (-N(C=O)O-) bonds.

[0070] Examples of suitable isocyanates for producing polyurethane copolymer chains include diisocyanates, such as aromatic diisocyanates, aliphatic diisocyanates, and combinations thereof. Examples of suitable aromatic diisocyanates include toluene diisocyanate (TDI), adducts of TDI and trimethylolpropane (TMP), methylene diphenyl diisocyanate (MDI), xylene diisocyanate (XDI), tetramethyl xylylene diisocyanate (TMXDI), hydrogenated xylene diisocyanate (HXDI), naphthalene 1,5-diisocyanate (NDI), 1,5-tetrahydronaphthalene diisocyanate, p-phenylene diisocyanate (PPDI), 3,3'-dimethyldiphenyl-4,4'-diisocyanate (DDDI), 4,4'-dibenzyl diisocyanate (DBDI), 4-chloro-1,3-phenylene diisocyanate, and combinations thereof. In some embodiments, the copolymer chain is substantially free of aromatic groups.

[0071] In a particular aspect, the polyurethane polymer chain is produced from diisocyanates including HMDI, TDI, MDI, H12 aliphatic compounds, and combinations thereof. In one aspect, the thermoplastic TPU may include polyester-based TPU, polyether-based TPU, polycaprolactone-based TPU, polycarbonate-based TPU, polysiloxane-based TPU, or combinations thereof.

[0072] On the other hand, the polymer layer can be formed from one or more of the following: EVOH copolymers, poly(vinyl chloride), polyvinylidene polymers and copolymers (e.g., polyvinylidene chloride), polyamides (e.g., amorphous polyamides), amide-based copolymers, acrylonitrile polymers (e.g., acrylonitrile-methyl acrylate copolymers), polyethylene terephthalate, polyetherimides, polyacrylimides, and other polymer materials known to have relatively low gas permeabilities. Blends of these materials and blends with the TPU copolymers described herein, and optionally including combinations of polyimides and crystalline polymers, are also suitable.

[0073] The barrier layers 206a, 206b may include two or more sublayers (multilayer films), such as those shown in U.S. Pat. Nos. 5,713,141 to Mitchell et al. and 5,952,065 to Mitchell et al., the disclosures of which are incorporated by reference in their entirety. In embodiments where the barrier layers 206a, 206b include two or more sublayers, examples of suitable multilayer films include microlayer films, such as those disclosed in U.S. Pat. No. 6,582,786 to Bonk et al., which is incorporated by reference in its entirety. In further embodiments, the barrier layers 206a, 206b may each independently include alternating sublayers of one or more TPU copolymer materials and one or more EVOH copolymer materials, wherein the total number of sublayers in each of the barrier layers 206a, 206b includes at least four (4) sublayers, at least ten (10) sublayers, at least twenty (20) sublayers, at least forty (40) sublayers, and / or at least sixty (60) sublayers.

[0074] The chamber 210 can be produced from the barrier layers 206a, 206b using any suitable technique, such as thermoforming (e.g., vacuum thermoforming), blow molding, extrusion, injection molding, vacuum molding, rotational molding, transfer molding, pressure molding, heat sealing, casting, low pressure casting, spin casting, reaction injection molding, radio frequency (RF) welding, etc. In one aspect, the barrier layers 206a, 206b can be produced by co-extrusion followed by vacuum thermoforming to produce the inflatable chamber 210, which can optionally include one or more valves (e.g., one-way valves) that allow the chamber 210 to be filled with a fluid (e.g., a gas).

[0075] Chamber 210 may be provided in a fluid-filled state (e.g., as provided in footwear 10) or in an unfilled state. Chamber 210 may be filled to include any suitable fluid, such as a gas or a liquid. In one aspect, the gas may include air, nitrogen (N2), or any other suitable gas. The fluid provided to chamber 210 may cause chamber 210 to be pressurized. Alternatively, the fluid provided to chamber 210 may be at atmospheric pressure, such that chamber 210 is not pressurized, but simply contains a volume of fluid at atmospheric pressure.

[0076] Chamber 210 desirably has a low gas permeability to maintain the gas pressure it maintains. In some embodiments, chamber 210 has a gas permeability to nitrogen that is at least about ten (10) times lower than the nitrogen permeability of a butyl rubber layer of substantially the same size. In one aspect, for an average film thickness of 500 microns (based on the thickness of barrier layers 206a, 206b), chamber 208 has a gas permeability of 15 cubic centimeters per square meter·atmosphere·day (cm 3 / m 2·atm·day) or less. In another aspect, the nitrogen permeability is 10cm 3 / m 2 ·atm·day or less, 5cm 3 / m 2 ·atm·day or less, or 1cm 3 / m 2 ·atm·day or less.

[0077] In some embodiments, the inner barrier layer 206a and the outer barrier layer 206b cooperate to define the geometry (e.g., thickness, width, and length) of the chamber 210. A perimeter seam 208 can extend around the chamber 210 to seal a fluid (e.g., air) within the chamber 210. Thus, the chamber 210 is associated with an area of ​​the bladder 202 where the interior surfaces of the upper barrier layer 206a and the lower barrier layer 206b are not joined together and are, therefore, separated from one another.

[0078] In some examples, the barrier layers 206a, 206b may include the same material to provide the chamber 210 with a uniform barrier configuration, such that when the pressure within the chamber 210 is adjusted, both sides of the adjustable element 200 will contract and relax at the same rate. Alternatively, a first barrier layer of the barrier layers 206a, 206b may be at least partially composed of a different barrier material and / or configuration than the other barrier layer of the barrier layers 206a, 206b to selectively impart a profile when the adjustable element 200 transitions between a relaxed state and a contracted state. For example, one of the barrier layers 206a, 206b may be at least partially formed to have a different elastic modulus and / or stiffness than the other barrier layer 206a, 206b, such that when the adjustable element 200 transitions from a relaxed state to a contracted state, the first barrier layer of the barrier layers 206a, 206b contracts at a different rate than the other barrier layer 206a, 206b to cause the adjustable element 200 to curl.

[0079] Still refer to FIG. 2A to FIG. 3B The transition between the relaxed state and the contracted state of the adjustable element 200 occurs when the pressure source 130 is activated to change the internal pressure of the adjustable element 200. For example, the pressure source 130 may draw a vacuum within the chamber 210 of the bladder 202 to transition the compressible member 300 to the contracted state ( Figure 2B ). It is generally contemplated that the compressible member 300 may be in an expanded state ( Figure 2A ) and contraction state ( Figure 2B ) between the expansion state and the contraction state, respectively corresponding to the relaxation state ( Figure 3A ) and contraction state ( Figure 3BAs described in more detail below, the adjustable element 200 includes one or more locking assemblies 400 disposed between the first barrier layer 206a and the second barrier layer 206b within the bladder 202. The locking assembly 400 is coupled to or otherwise integrated with the compressible member 300 within the interior cavity 204 of the bladder 202 and is operable between an unlocked state and a locked state. Figure 2A As illustrated, compressible component 300 includes lattice structure 302 and may have a defined geometric shape including relief 304. In other words, lattice structure 302 may include different geometric configurations to impart different narrowed profiles in different areas of upper 100.

[0080] like Figure 2B , and when the pressure in the internal cavity 204 is reduced, the lattice structure 302 collapses in the width direction of the relief 304, and the upper 100 narrows around the foot, so that the compressible component 300 is in a contracted state. Conversely, the pressure within the internal cavity 204 increases to allow the compressible component 300 to move to an expanded state, so that the adjustable element 200 and the upper 100 are in a relaxed state. Here, the elastic material and / or geometry of the lattice structure 302 of the compressible component 300 can bias the adjustable element 200 and the upper 100 toward a relaxed or expanded state. Similarly, Figure 4 The adjustable element 200 is an elastic structure that returns to a relaxed state when pressure increases, and when the internal cavity 204 ( Figure 3B ) can be compressed when the pressure inside is reduced.

[0081] Reference now Figure 4 and Figure 5 , showing a general example of an adjustable element 200a according to the principles of the present disclosure. One or more features of the adjustable element 200a may be incorporated into an article of footwear 10, such as those shown in FIGS. 1 to 3. Figure 3B As shown in . One or more locking assemblies 400 in the adjustable element 200a are associated with or attached to the compressible member 300. For example, the locking assembly 400 can be attached to one side of the compressible member 300a or integrated within the compressible member 300a. It is also contemplated that the adjustable element 200a can be configured with a single locking assembly 400. Figure 4 The adjustable element 200a illustrated in FIG. 2 includes tapered ends 224 on either end of the compressible member 300a.

[0082] refer to Figures 4 to 6, the compressible component 300a of the adjustable element 200a has one or more first portions or adjustment members 306a and second portions or docks 308a. Each locking assembly 400a can be positioned within a corresponding receiving portion 310 defined by the dock 308a of the compressible component 300a to fix the position of the locking assemblies 400a relative to each other and relative to the adjustable element 200a. The lattice structure 302 generally defines the adjustment members 306a of the compressible component 300a. It is also contemplated that the lattice structure 302 can define a slot 303 through which a locking strip 402a of each locking assembly 400a can pass, as described in more detail below.

[0083] like Figure 4 As illustrated, the locking strips 402a can be staggered on opposite sides of the abutment 308b of the compressible component 300a, whereby a first locking strip of the locking strips 402a includes an anchored first end 403a attached to the first tapered end 224 and a free second end 403b that abuts with the first locking assembly of the locking assembly 400a, while an adjacent second locking strip of the locking strips 402a includes an anchored first end attached to the opposite second tapered end 224 and a free second end that abuts with the second locking assembly of the locking assembly 400a. Additionally or alternatively, the locking strips 402a can be disposed on the same side relative to the abutment 308b. Each locking strip 402a can include a first end coupled to one of the tapered ends 224 of the adjustable element 200a, such that the locking strip 402a is disposed at the adjustment member 306a of the compressible component 300a. It is also contemplated that the second end of the locking strip 402a may be coupled to the opposite tapered end 224 via an elastic tether 405 to maintain the second end of the locking strip 402a along the curvature of the upper 100 ( Figure 3A In other words, the insertion of the locking strip 402a through the second end of the locking assembly is performed by the tether 405 along the upper 100 ( Figure 3A ) is maintained to follow the general curvature of the upper 100. It is contemplated that the elastic tether 405 is stretched in the relaxed state of the upper 100 and is compressed or otherwise shortened under the applied vacuum in the narrowed state of the upper 100. The compressible member 300a can expand and contract around the locking assembly 400a, so that the locking strip 402a of the locking assembly 400a is translated through the locking assembly 400a at least in part by the movement of the compressible member 300a. Although with respect to Figures 4 to 6 Although described, it is contemplated that the configuration of locking assembly 400a and its components relative to compressible member 300a may be incorporated into additional or alternative configurations discussed herein.

[0084] refer to Figure 7, the locking assembly 400a includes a locking element 404a and a biasing member 408a disposed in a housing 406a. The biasing member 408a can have an extended state corresponding to a first configuration of the locking element 404a and a compressed state corresponding to a second configuration of the locking element 404a. The locking element 404a is attached to the housing 406a via a pin 410, and the housing 406a defines a slot 412 through which the locking strip 402a is accommodated and extends. It is contemplated that the locking element 404a is disposed at the docking portion 308a of the compressible component 300a and can operate between a first configuration and a second configuration. The first configuration of the locking element 404a generally corresponds to an expanded state of the compressible component 300a and / or a relaxed state of the adjustable element 200a, and the second configuration of the locking element 404a generally corresponds to a contracted state of the compressible component 300a and / or the adjustable element 200a. The locking element 404 has an engagement feature 414 that extends from a body 416 of the locking element 404a and engages an interface surface 418a of the locking strip 402a when the locking element 404a is in the second configuration.

[0085] The engagement features 414 of the locking element 404a each have a biasing surface 422 formed at an oblique angle such that the engagement features 414 are angled to engage the interface surface 418a of the locking strip 402a. It is contemplated that the engagement features 414 may generally define a plurality of teeth 414 having a stepped configuration, wherein the angled biasing surface 422 partially defines an engagement edge 424 of each engagement feature 414. While the biasing surface 422 facilitates movement of the locking strip 402a in a first direction D1 relative to the locking element 404a, the engagement edge 424 is configured to abut or otherwise engage the interface surface 418a to prevent the locking strip 402a from moving in an opposite, second direction relative to the locking element 404a. Figure 8 As illustrated, the biasing member 408a is disposed between the locking element 404a and the locking bar 402a and has a compressed state corresponding to the contracted state of the compressible component 300a, as described below.

[0086] Reference now Figures 5 to 10B, the operation of the locking assembly 400a will be described in detail. The locking assembly 400a includes a locking element 404a attached to and disposed within the housing 406a, wherein the locking bar 402a is at least partially disposed within the housing 406a. The locking bar 402a has an interface surface 418a that defines a plurality of positioning grooves or spaces 420, and the engagement features 414 of the locking element 404a can be selectively disposed in the positioning grooves or spaces 420. For example, the locking element 404a can be transformed from a first configuration to a second configuration such that the engagement features 414a engage with the plurality of spaces 420 defined along the interface surface 418a. When the compressible component 300a moves from an expanded state to a contracted state, the locking element 404a changes from a first configuration ( Fig. 10A ) to the second configuration ( Fig. 10B ) transition. That is, when the pressure source 130 ( Figure 2B )Change capsule 202( Figure 3B )'s internal cavity 204 ( Figure 3B ), the locking element 404a engages the interface surface 418a of the locking strip 402a due to the pressure exerted on the locking element 404a by one of the barrier layers 206a, 206b when the bladder 202 is placed under vacuum. The engagement feature 414 locks or otherwise holds the locking strip 402a relative to the housing 406a such that the locking strip 402a is prevented from making additional lateral movement in at least one direction. For example, when the compressible member 300a is further moved into the compressed state, the locking strip 402a can translate in a first direction D1 toward the housing 406a and is prevented from translating in an opposite second direction D2 away from the housing 406a by the engagement feature 414 of the locking element 404a.

[0087] The locking bar 402a is maintained in the locked state via the engagement feature 414 for the duration that the compressible member 300 and / or the adjustable element 200a is in the contracted state. Although the locking bar 402a may be prevented from moving away from the housing 406a in the opposite second direction, it is contemplated that the locking bar 402a may be further extended toward the housing 406a even when the engagement feature 414 is engaged with the interface surface 418a. For example, the pressure source 130( Figure 2B ) can further reduce the internal cavity 204 ( Figure 3B ) which can further compress the compressible member 300 and pull the locking strip 402a toward the housing 406a. In this further evacuated configuration, the locking strip 402a can pass along the biasing surface 422 of the engagement feature 414 and be locked in place by the engagement edge 424 of the engagement feature 414. In other words, when the locking element 404a is in the bladder 202 ( Figure 3B )'s internal cavity 204 ( Figure 3B ) is in a second configuration ( Fig. 10B ), the engagement feature 414 engages the interface surface 418a. When the vacuum pressure is removed, the locking element 404a is biased by the biasing member 408a to the first configuration so that the internal cavity 204 ( Figure 3A ) has a first pressure corresponding to an expanded state of the compressible component 300a, as described in more detail below.

[0088] like Figures 8 to 9 As shown, the locking element 404a includes a protrusion 430 that extends into an opening 432 defined by the housing 406a. The biasing member 408a is disposed within the opening 432 around the protrusion 430 of the locking element 404a. The biasing member 408a is depicted as a coil spring ( Figure 7 ). It is also contemplated that the biasing member 408a may have alternative configurations, including but not limited to a leaf spring and / or a living hinge. When the biasing member 408a transforms the locking element 404a from the second configuration back to the first configuration, the locking element 404a rotates around the pin 410 within the housing 406a. Figure 8 As shown, the locking element 404a includes a first end 433 and an opposite second end 433. The first end 433 includes a hinge element 435, which is configured to receive the pin 410. The second end 434 of the locking element 404a can be elevated or otherwise at least partially disposed above the housing 406a. Figure 3B )'s internal cavity 204 ( Figure 3B ) is passed through the pressure source 130 ( Figure 2B ) is reduced, the second end 434 of the locking element 404a can be pressed into the housing 406a.

[0089] refer to Fig. 10A and Fig. 10B , locking element 404a is depicted in a first configuration ( Fig. 10A ) and the second configuration ( Fig. 10B When the locking element 404a is in the first configuration, the second end 434 of the locking element 404a is raised relative to the housing 406a so that the locking bar 402a can move freely within the housing 406a. Fig. 10B), as the compressible member 300a enters the retracted state, the locking strip 402a can move along the angled surface 422 of the engagement feature 414. As described above, in the second configuration of the locking element 404a, the locking strip 402a is prevented from translating in the second, opposite direction by the engagement edge 424 of the engagement feature 414 abutting the interface surface 418a of the locking strip 402a. For example, when the locking element 404a is compressed within the housing 406a or otherwise translated toward the locking strip 402a, the engagement edge 424 is disposed within the space 420 defined by the interface surface 418a of the locking strip 402a ( Fig. 10B ). When the adjustable element 200 is under vacuum, the second end 434 of the locking element 404a has a greater torque applied to compress the biasing member 408a and generally lock the locking bar 402a via the engagement feature 414. For example, the torque is Fig. 10B 4. An arrow is depicted in FIG. 4 as being applied downwardly on the second end 434 of the locking element 404a.

[0090] Special References Figures 11 to 14 , another example of an adjustable element 200b incorporating the principles of the present disclosure is provided. In view of the substantial similarity in structure and function of the components associated with adjustable element 200b relative to adjustable element 200a, the same reference numerals are used hereinafter and in the drawings to identify the same components, while the same reference numerals with a letter extension are used to identify those components that have been modified.

[0091] Reference now Figures 11 to 14 , an adjustment element 200b is illustrated having a locking assembly 400b integrated within a docking portion 308b of a compressible member 300b. In this example, the docking portion 308b is substantially flush with respect to the lattice structure 302 of the compressible member 300b. The locking assembly 400b is depicted as having a locking strip 402b disposed within a first portion 306b of the compressible member 300b and a locking element 404b housed within a housing 406b. The locking element 404b includes a biasing member 408b integrally formed with the locking element 404b, as described below. The locking strip 402b is illustrated as having a plurality of teeth 440 defining an interface surface 418b of the locking strip 402b. As described below, the engagement feature 414 of the locking element 404b engages the teeth 440b along the interface surface 418b to substantially limit movement of the locking strip 402b in at least one direction.

[0092] The engagement feature 414 is positioned on the locking element 404b at an end opposite the biasing member 408b (ie, the second end 434b). The housing 406b may define a pair of flanges 442b ( Fig.14). As described above, the locking element 404b is attached to the housing 406b via the pin 410 and rotates relative to and within the housing 406b about the pin 410. In this example, the biasing member 408b includes a first arm 444b and a second arm 446b that rest on a pair of flanges 442b of the housing 406b, respectively.

[0093] like Fig.15A and Fig. 15B As shown, the body 416 of the locking element 404b is in a state of being ... Fig. 15B 402b and in response to the vacuum applied to the capsule 202) is pressed toward the locking strip 402b, and the biasing member 408b is compressed. In other words, when the locking element 404b is transformed from the first configuration to the second configuration, the distal ends of the arms 444b, 446b of the biasing member 408b travel along the flange 442 of the housing 406b. The biasing member 408b of this example is configured as a living hinge, so that the biasing member 408b is integrally formed with the body 416 of the locking element 404b or otherwise formed as a single body. It is conceivable that the biasing member 408b can be formed via injection molding of the locking element 404b, so that each of the biasing member 408b, the body 416 and the engagement feature 414 can be integrally formed by the same material. Alternatively, the engagement feature 414 can be separately attached or connected to the body 416, for example, via welding or other attachment methods.

[0094] refer to Fig.15A and Fig. 15B The engagement feature 414 of the locking element 404b is aligned with the above Fig. 10A and Fig. 10B 4. The engagement feature 414 is configured to engage the teeth 440 of the locking strip 402b in a similar manner as described above. The engagement edge 424 of the engagement feature 414 is disposed between the teeth 440 and engages the teeth 440 of the locking strip 402b. As similarly discussed above, the engagement feature 414 prevents the locking strip 402b from moving in at least one direction, such that when the locking strip 402b is urged away from the housing 406b toward the expanded state in response to an external force, the engagement feature 414 engages the teeth 440 of the interface surface 418. For example, during use, the foot may be positioned between the lining 120 ( Figure 2B ) so that a force is applied to the locking strip 402b. In this case, the locking element 404b maintains the contracted state of the compressible component 300 by engaging the teeth 440 of the locking strip 402b. When the adjustable element 200b is under vacuum, the second end 434b of the locking element 404b has a greater torque that is applied to compress the biasing member 408b and generally lock the locking strip 402b via the engagement feature 414. For example, the torque is Fig. 15B4. An arrow is depicted in FIG. 4 as being applied downwardly on the second end 434b of the locking element 404b.

[0095] Special References Figures 16 to 20B , another example of a locking assembly 400c incorporating the principles of the present disclosure is provided. In view of the substantial similarity in structure and function of the components associated with locking assembly 400c relative to locking assembly 400a, the same reference numerals are used hereinafter and in the drawings to identify the same components, while the same reference numerals with a letter extension are used to identify those components that have been modified.

[0096] The locking assembly 400c is depicted as having a locking bar 402c and a locking element 404c housed within a housing 406c. The locking bar 402c includes a plurality of teeth 440 to define an interface surface 418c. A biasing member 408c is disposed between the locking element 404c and the housing 406c. The biasing member 408c is illustrated as a torsion spring disposed about the pin 410. Fig.18 and Fig.19 As illustrated, the body 416 of the locking element 404c and the housing 406c each define an arcuate recess 460c in which the attachment portion 462c of the biasing member 408c is positioned. In other words, the attachment portion 462c of the biasing member 408c is disposed about the pin 410 and is positioned within the arcuate recess 460c of each of the locking element 404c and the housing 406c. The housing 406c also defines a groove 464c in which at least one leg 466c of the biasing member 408c is positioned proximate to the locking element 404c.

[0097] like Fig. 20A and Fig. 20B As shown, the body 416 of the locking element 404c may be similar to that described above with respect to Fig. 10A , Fig. 10B , Fig.15A and Fig. 15B When the locking element 404c is compressed into the second configuration, the legs 466c of the biasing member 408c move toward each other. As described above, when the internal cavity 204 ( Figure 3A ) increases, the biasing member 408c biases the locking element 404c back to the first configuration ( Fig. 20A). Thus, locking assembly 400c operates in a similar manner as described above with respect to locking assemblies 400a and 400b. In any of these configurations, engagement feature 414 engages locking strips 402a, 402b, 402c to hold compressible members 300a, 300b, 300c, respectively, in a contracted state. When adjustable element 200c is under vacuum, second end 434 of locking element 404c moves toward housing 406c and resists the bias applied by biasing member 408c on locking element 404c to lock locking strip 402c via engagement feature 414. The applied force is Fig. 20B 4. The force applied is caused by the barrier layers 206a, 206b of the bladder 202 constricting and engaging the locking element 404c, thereby moving the locking element 404c to the locked state, as shown in FIG. Fig. 20B shown.

[0098] Special References Figures 21 to 23B , another example of a locking assembly 400e for an adjustable element 200e is provided. In this configuration, the locking assembly 400e includes a locking strip 402e and at least one compression element 430e disposed between locking elements 404e, and the locking element 404e includes a first engagement feature 414e1 and a second engagement feature 414e2. It is generally conceivable that the elastic element described herein can form a portion or all of the locking strip 402e. The locking element 404e is connected to the locking strip 402e via a tether 405e, and the tether 405e is coupled to the housing 406e of the locking element 404e. The engagement features 414e1, 414e2 can be coupled to the housing 406e via an adhesive 407e and / or other attachment features to fix the locking elements 414e1, 414e2 relative to the housing 406e in the locked state of the locking assembly 400e. The locking bar 402e extends through the housing 406e between the locking elements 414e1, 414e2 and is free to translate within the housing 406e when the locking elements 404e are in the unlocked state. Fig.22A and Fig.23A 4, the locking strip 402e is provided with a plurality of locking elements 402e, wherein the locking element 402e is provided with a plurality of locking elements 402e, wherein the plurality of locking elements ...F , so that the locking strip 402e is prevented from making additional movement within the housing 406e of the locking assembly 400e. When the second pressure is defined, the locking strip 402e translates to shrink or otherwise shrink the bladder 202 around the wearer until the predetermined minimum pressure is met. When the interior cavity 204 of the bladder 202 reaches the predetermined minimum pressure, the friction force F exerted by the engagement features 414e1, 414e2 on the locking strip 402e F Any further movement or translation of the locking bar 402e relative to the housing 406e is prevented.

[0099] In one example, if Fig.24A and Fig. 24B As shown, the locking element 404f includes a first compression element 430f1 and a second compression element 430f2, the first compression element and the second compression element are located in the inner cavity 204 ( Fig.21 ) within the housing 406f. In this configuration, the engagement features 414f1, 414f2 are centrally disposed between the compression elements 430f1, 430f2 within the housing 406f. The first compression element 430f1 and the second compression element 430f2 can help provide uniform compression on the locking element 404f. For example, utilizing multiple compression elements 430f1, 430f2 can help follow the contours of the wearer's body, such as a foot structure and / or a torso structure, so that the first compression element 430f1 and the second compression element 430f2 can be compressed at a variable rate. In this example, the locking element 404f can be aligned along the wearer's body in a manner that presents an uneven alignment of the first compression element 430f1 and the second compression element 430f2, and utilizing the first compression element 430f1 and the second compression element 430f2 can maximize the compression and stability of the locking element 404f relative to the wearer. Fig. 24B As illustrated, the first compression element 430f1 and the second compression element 430f2 are substantially equally compressed and define a locked condition in which the engagement features 414f1 , 414f2 surround the locking strip 402f.

[0100] Special References Fig.25 , another example of an adjustable element 200d incorporating the principles of the present disclosure is provided. In view of the substantial similarity in structure and function of the components associated with adjustable element 200d relative to adjustable element 200a, the same reference numerals are used hereinafter and in the drawings to identify the same components, while the same reference numerals with a letter extension are used to identify those components that have been modified.

[0101] The compressible member 300d may be configured to have a corrugated profile including a plurality of waves or ridges 320, such as Fig.25 As shown. Fig.25The adjustable element 200d illustrated in FIG. 4 may be integrated with the spine 320 such that the locking assembly 400a may be positioned at various locations along the compressible member 300d.

[0102] Reference now FIG. 26A to FIG. 27B , a general example of an adjustable element is provided according to the principles of the present disclosure. FIG. 26A to FIG. 27B The adjustable element 200 illustrated in FIG. 1 may incorporate any of the adjustable elements 200a to 200c, the compressible components 300a to 300f2, and / or the locking assemblies 400a to 400f, as described herein in any combination. The adjustable element 200 may be in a relaxed or expanded state ( Fig.26A ) and contraction state ( Fig.26B ) is shown. The pressure source 130 can be activated to define at least a partial vacuum within the interior cavity 204 of the bladder 202. The at least partial vacuum causes the pressure within the interior cavity 204 to decrease, which causes the compressible member 300 to narrow or otherwise contract. For example, the illustrated compressible member 300 includes a lattice structure 302 that can contract, thereby causing the size of the relief 304 to decrease. The locking strip 402 of the locking assembly 400 is disposed within the lattice structure 302 of the compressible member 300 and is coupled to at least one end 224 of the adjustable element 200. As shown in FIG. Fig. 23B As shown, the locking element 404 is pressed downwardly due to the limited reduced pressure defined by the pressure source 130, and the engagement feature 414 engages the interface surface 418 of the locking bar 402 ( Fig. 10B , Fig. 15B and Fig. 20B ).

[0103] The engagement edge 424 of the locking element 404 holds the locking strip 402, and thus the compressible member 300, in the retracted state ( Fig.26B and Fig.27B). It is contemplated that additional vacuum may be applied to the interior cavity 204 of the capsule 202 to further reduce the pressure, as generally mentioned above. In this state, the compressible member 300 may be further compressed so that the locking strip 402 may translate a greater distance within the housing 406. The interface surface 418 may pass along the angled surface 422 of the locking element 404 below the engagement feature 414 in the first direction D1, and the locking strip 402 may be restrained by the engagement edge 424 of the locking element 404 from moving again in the opposite direction. Once the pressure within the interior cavity 204 increases, the end 434 of the locking element 404 may be released, and the biasing member 408 will bias the engagement feature 414 away from the interface surface 418 of the locking strip. In other words, the locking element 404 is biased from the second configuration in which the engagement feature 414 engages with the interface surface 418 of the locking strip 402 to the first configuration in which the engagement feature 414 disengages from the interface surface 418 of the locking strip 402.

[0104] The adjustable element 200 provides a compressive force that helps the upper 100 conform to the wearer's foot. The compression fit of the upper 100 against the wearer's foot advantageously provides additional support during wear and helps stabilize the movement of the foot and / or ankle. For example, the foot and / or ankle are stabilized by the adjustable element 200 and the upper 100 during lateral movement. In addition, the variable pressure pump 130 can continue to draw at least a partial vacuum during wear until a threshold pressure is reached. Therefore, as the wearer's activity increases, the upper 100 becomes more stable due to the compressive force. Once the wearer is ready to take off the footwear 10, the user can release the pressure of the adjustable element to take off the footwear 10.

[0105] The following clauses provide exemplary configurations of adjustable elements for use in the above-described articles of footwear.

[0106] Item 1. An adjustable element comprises: a bladder defining an internal cavity; a compressible member disposed within the internal cavity and operable between an expanded state and a contracted state; a locking strip comprising a first end anchored at a first position within the bladder and a second end disposed at an end of the locking strip opposite to the first end; and a lock accommodating the locking strip and operable between a locked state restricting movement of the locking strip relative to the bladder and an unlocked state allowing movement of the locking strip relative to the bladder.

[0107] Clause 2. The adjustable element of Clause 1, wherein the compressible member includes a channel extending therethrough, the locking strip being slidably received by the channel.

[0108] Clause 3. The adjustable element of any one of Clause 1 or Clause 2, wherein the compressible member is formed of foam.

[0109] Clause 4. An adjustable element according to any of the preceding clauses, wherein the locking strip includes a longitudinal axis extending between the first end and the second end, and the compressible member moves along the longitudinal axis when moving between the expanded state and the contracted state.

[0110] Clause 5. An adjustable element according to any one of the preceding clauses, wherein the locking strip comprises a first side and a second side, the second side being formed on a side of the locking strip opposite to the first side, the first side comprising a first series of engagement features, the first series of engagement features being operable to engage the lock in the locked state.

[0111] Clause 6. The adjustable element of Clause 5, wherein the lock comprises a second series of engagement features operable to engage the first series of engagement features in the locked state and / or the lock is biased to the locked state by a biasing member.

[0112] Clause 7. The adjustable element of any of the preceding clauses, wherein the compressible member is moved from the expanded state to the contracted state by removing fluid from the interior cavity.

[0113] Clause 8. The adjustable element of any of the preceding clauses, wherein the lock is secured relative to the bladder in a second position spaced from the first position.

[0114] Clause 9. The adjustable element of Clause 8, wherein an effective length of the locking strip decreases between the first position and the second position when the compressible member moves from the expanded state to the contracted state.

[0115] Clause 10. An article of footwear incorporating an adjustable element according to any of the preceding clauses.

[0116] Item 11. An adjustable element, comprising: a bladder defining an internal cavity; a compressible member disposed within the internal cavity and operable between an expanded state and a contracted state; a locking strip comprising a first end anchored at a first position within the bladder and a second end disposed at an end of the locking strip opposite to the first end; and a lock fixed relative to the bladder at a second position spaced apart from the first position and accommodating the locking strip, wherein the lock is operable to selectively fix the position of the locking strip relative to the bladder in a locked state when the compressible member moves to the contracted state.

[0117] Clause 12. The adjustable element of Clause 11, wherein the compressible member includes a channel extending therethrough, the locking strip being slidably received by the channel.

[0118] Clause 13. The adjustable element of any of Clauses 11 or 12, wherein the compressible member is formed of foam.

[0119] Clause 14. The adjustable element of any of the preceding clauses, wherein the locking strip includes a longitudinal axis extending between the first end and the second end, the compressible member moving along the longitudinal axis when moving between the expanded state and the contracted state.

[0120] Clause 15. An adjustable element according to any of the preceding clauses, wherein the locking strip comprises a first side and a second side, the second side being formed on a side of the locking strip opposite to the first side, the first side comprising a first series of engagement features, the first series of engagement features being operable to engage the lock in the locked state.

[0121] Clause 16. The adjustable element of Clause 15, wherein the lock comprises a second series of engagement features operable to engage the first series of engagement features in the locked state and / or the lock is biased to the locked state by a biasing member.

[0122] Clause 17. The adjustable element of any of the preceding clauses, wherein the lock is rotatable relative to the bladder.

[0123] Clause 18. The adjustable element of any of the preceding clauses, wherein the compressible member is moved from the expanded state to the contracted state by removing fluid from the interior cavity.

[0124] Clause 19. The adjustable element of any of the preceding clauses, wherein an effective length of the locking strip decreases between the first position and the second position when the compressible member moves from the expanded state to the contracted state.

[0125] Clause 20. An article of footwear incorporating an adjustable element according to any of the preceding clauses.

[0126] The foregoing description has been provided for the purpose of illustration and description. The foregoing description is not intended to be exhaustive or to limit the present disclosure. Individual elements or features of a particular configuration are generally not limited to that particular configuration, but where applicable, individual elements or features are interchangeable and can be used in a selected configuration, even if not specifically shown or described. Individual elements or features of a particular configuration may also be varied in a variety of ways. Such variations should not be considered as departing from the present disclosure, and all such modifications are intended to be included within the scope of the present disclosure.

Claims

1. An adjustable element for an article of footwear, the adjustable element comprising: a bladder defining an interior cavity; a compressible member disposed within the interior cavity and operable between an expanded state and a contracted state; a locking strip including a first end anchored at a first location within the bladder and a second end disposed at an end of the locking strip opposite the first end; as well as A lock receives the locking strip and is operable between a locked condition restricting movement of the locking strip relative to the bladder and an unlocked condition permitting movement of the locking strip relative to the bladder.

2. The adjustable element of claim 1, wherein the compressible member includes a channel extending therethrough, the locking bar being slidably received by the channel.

3. The adjustable element of claim 1, wherein the compressible component is formed of foam.

4. The adjustable element of claim 1, wherein the locking bar includes a longitudinal axis extending between the first end and the second end, the compressible member moving along the longitudinal axis when moving between the expanded state and the contracted state.

5. The adjustable element of claim 1 , wherein the locking bar includes a first side and a second side, the second side being formed on a side of the locking bar opposite the first side, the first side including a first series of engagement features operable to engage the lock in the locked state.

6. An adjustable element according to claim 5, wherein the lock comprises a second series of engagement features operable to engage the first series of engagement features in the locked state and / or the lock is biased into the locked state by a biasing member.

7. The adjustable element of claim 1, wherein the compressible member moves from the expanded state to the contracted state by removing fluid from the interior cavity.

8. The adjustable member of claim 1, wherein the lock is secured relative to the bladder in a second position spaced from the first position.

9. The adjustable element of claim 8, wherein the effective length of the locking strip decreases between the first position and the second position when the compressible member moves from the expanded state to the contracted state.

10. An article of footwear incorporating the adjustable element of claim 1.

11. An adjustable element for an article of footwear, the adjustable element comprising: a bladder defining an interior cavity; a compressible member disposed within the interior cavity and operable between an expanded state and a contracted state; a locking strip including a first end anchored at a first location within the bladder and a second end disposed at an end of the locking strip opposite the first end; as well as A lock is secured relative to the bladder at a second position spaced from the first position and receives the locking strip, the lock being operable to selectively secure the position of the locking strip relative to the bladder in a locked state when the compressible member is moved to the contracted state.

12. The adjustable element of claim 11, wherein the compressible member includes a channel extending therethrough, the locking bar being slidably received by the channel.

13. The adjustable element of claim 11, wherein the compressible member is formed of foam.

14. The adjustable element of claim 11, wherein the locking bar includes a longitudinal axis extending between the first end and the second end, the compressible member moving along the longitudinal axis when moving between the expanded state and the contracted state.

15. The adjustable element of claim 11, wherein the locking bar includes a first side and a second side, the second side being formed on a side of the locking bar opposite the first side, the first side including a first series of engagement features operable to engage the lock in the locked state.

16. An adjustable element according to claim 15, wherein the lock comprises a second series of engagement features operable to engage the first series of engagement features in the locked state and / or the lock is biased into the locked state by a biasing member.

17. The adjustable element of claim 11, wherein the lock is rotatable relative to the bladder.

18. The adjustable element of claim 11, wherein the compressible member moves from the expanded state to the contracted state by removing fluid from the interior cavity.

19. The adjustable member of claim 11, wherein an effective length of the locking strip decreases between the first position and the second position when the compressible member moves from the expanded state to the contracted state.

20. An article of footwear incorporating the adjustable element of claim 11.

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