Tethered fluid-filled chamber

Abstract

The invention relates to a tethered fluid-filled chamber. An article of footwear may include a chamber having an outer barrier and tether elements. The barrier may be formed from a polymeric material and define an interior cavity, and tether elements may be located within the interior cavity and connected to opposite sides of the barrier. When the chamber is pressurized, the tether element may extend through the interior cavity and be placed in tension by an outward force of a pressurized fluid within the interior cavity. The tether element may have a variety of configurations. For example, the tether elements may have an oblique orientation, or different tether elements may have different lengths. The tether element may also have plates or tethers secured to opposite sides of the chamber such that one or more tethers extend between the plates or tethers. In addition, the tether element may include one or more tabs extending through the interior cavity.

Description

[0001] This application is a divisional application of an application filed on November 4, 2010, with application number 201911269112.6 and invention name “Tethered Fluid-Filled Chamber”.

[0002] The application with the application date of November 4, 2010, the application number of 201911269112.6, and the invention name of “Tethered Fluid-Filled Chamber” is a divisional application of the application with the application date of November 4, 2010, the application number of 201710441672.X, and the invention name of “Tethered Fluid-Filled Chamber”.

[0003] The application with the application date of November 4, 2010, the application number of 201710441672.X, and the invention name of “Tethered Fluid-Filled Chamber” is a divisional application of the application with the application date of November 4, 2010, the application number of 201510341177.2, and the invention name of “Tethered Fluid-Filled Chamber”.

[0004] The application with the application date of November 4, 2010, the application number of 201510341177.2, and the invention name of “Tethered Fluid-Filled Chamber” is a divisional application of the application with the application date of November 4, 2010, the application number of 201080054235.9, and the invention name of “Tethered Fluid-Filled Chamber”. Technical Field

[0005] The present invention relates to articles of footwear. More particularly, the present invention relates to articles of footwear incorporating tethered fluid-filled chambers. Background Art

[0006] Footwear articles generally include two main elements: an upper and a sole structure. The upper is formed by a variety of material elements (such as fabric, foam, leather, and synthetic leather), which are stitched or glued together to form a space for comfortably and firmly accommodating the foot inside the footwear. More specifically, the upper is generally on the instep and toe area of ​​the foot, along the medial and lateral sides of the foot, under the foot and around the heel area of ​​the foot. In some footwear articles, such as basketball shoes and boots, the upper can extend upward and around the ankle to provide support or protection for the ankle. The entrance to the space on the interior of the upper is generally provided by the ankle opening in the heel region of the footwear. The lacing system is generally included in the upper to adjust the fit of the upper, thereby allowing the foot to enter the space in the upper and leave the space in the upper. The lacing system also allows the wearer to change certain dimensions of the upper, especially the circumference, to provide variable dimensions to both feet. Additionally, the upper may include a tongue that extends under the lacing system to enhance the adjustability of the footwear.

[0007] The sole structure is arranged adjacent to the lower portion of the upper and is generally positioned between the foot and the ground. In many articles of footwear, including sports footwear, the sole structure generally includes an insole, a midsole, and an outsole. The insole is a thin, compressible member that is located within and adjacent to the lower surface of the space to increase the comfort of the footwear. The midsole, which may be fixed to the lower surface of the upper and extend downward from the upper, forms the middle layer of the sole structure. In addition to attenuating the reaction force of the ground (i.e., providing cushioning for the foot), for example, the midsole may limit foot movement or impart stability. The outsole, which may be fixed to the lower surface of the midsole, forms the ground contacting portion of the footwear and is generally made of a durable and wear-resistant material that includes a texture to improve traction.

[0008] Conventional midsoles are primarily formed of foamed polymer materials such as polyurethane or ethylene vinyl acetate that extend throughout the length and width of the footwear. In some footwear articles, the midsole may include various additional footwear elements that improve the comfort or performance of the footwear, including a plate, an adjuster, a fluid-filled cavity, a stabilizing element, or a motion control member. In some configurations, any of these additional footwear elements may be located between the midsole and any of the uppers and outsoles, for example, embedded in the midsole, or encapsulated by the foamed polymer material of the midsole. Although many conventional midsoles are primarily formed of foamed polymer materials, fluid-filled cavities or other non-foam structures may form a large portion of certain midsole configurations. Summary of the invention

[0009] An article of footwear having an upper and a sole structure secured to the upper is disclosed below. At least one of the upper and the sole structure includes a chamber having an outer barrier and a tether element. The barrier is formed of a polymer material defining an interior cavity, and the barrier has (a) a first portion forming a first surface of the chamber and (b) a second portion forming an opposing second surface of the chamber. The tether element is located within the interior cavity and connected to the first portion and the second portion. In some configurations, the tether element may extend through the interior cavity and be placed in tension by the outward force of a pressurized fluid within the interior cavity, thereby preventing the barrier from expanding outwardly and maintaining the desired shape of the chamber.

[0010] The tether element may have a variety of configurations. For example, the tether element may be connected to an offset region of a first portion and a second portion of the barrier to impart an oblique orientation. As another example, the first tether element and the second tether element may have different lengths, which may impart a contour to the chamber. The tether element may also have a first plate or tie piece secured to the first portion of the barrier, a second plate or tie piece secured to the second portion of the barrier, and a tether or multiple tethers connected to the first plate and the second plate and extending between the first plate and the second plate (i.e., through the interior cavity). In some configurations, the tether element may include a first sheet or layer secured to the first portion of the barrier, a second sheet or layer secured to the second portion of the barrier, and the first sheet and the second sheet are in contact with each other and bonded to each other.

[0011] One aspect of the present invention provides an article of footwear having an upper and a sole structure secured to the upper, at least one of the upper and the sole structure including a chamber, the chamber comprising: an outer barrier formed of a polymer material and defining an interior cavity, the barrier having (a) a first portion forming a first surface of the chamber and (b) a second portion forming an opposing second surface of the chamber; and

[0012] A tether element is positioned within the interior cavity and is connected to the offset regions of the first portion and the second portion to impart an angled orientation.

[0013] A fluid may be located within the interior cavity, and the fluid may be pressurized to apply an outward force to the barrier and induce tension in the tether element.

[0014] The tether element may include a sheet having a two-dimensional configuration.

[0015] The sheet may be at least one of a fabric or a polymer layer.

[0016] The tether element may have a one-dimensional configuration.

[0017] The tether element may include a first tie that is securable to the first portion of the chamber, a second tie that is securable to the second portion of the chamber, and at least one tether that extends between the first tie and the second tie.

[0018] The tether element may include: (a) a first plate positioned within the interior cavity and secured to the first portion of the chamber, (b) a second plate positioned within the interior cavity and secured to the second portion of the chamber, and (c) a plurality of tethers connected to the first plate and the second plate and extending between the first plate and the second plate.

[0019] The first plate may extend adjacent at least 50% of the first portion of the chamber, and the first plate may be contoured to have a non-planar configuration.

[0020] The tether element may include a first sheet and a second sheet, the first sheet may be secured to the first portion of the barrier, the second sheet may be secured to the second portion of the barrier, and the first sheet and the second sheet may be in contact with and connected to each other.

[0021] Another aspect of the present invention provides an article of footwear having an upper and a sole structure secured to the upper, at least one of the upper and the sole structure comprising a chamber, the chamber comprising:

[0022] an outer barrier formed of a polymeric material and defining an interior cavity, the barrier having (a) a first portion forming a first surface of the chamber and (b) a second portion forming an opposing second surface of the chamber;

[0023] a first tether element located within the interior cavity and extending from the first portion to the second portion, the first tether element having a first length between the first portion and the second portion; and

[0024] A second tether element is positioned within the interior cavity and extends from the first portion to the second portion, the second tether element having a second length between the first portion and the second portion, the first length being greater than the second length.

[0025] The chamber may extend from a forefoot region of the sole structure to a heel region, the first tether element may be positioned in the heel region, and the second tether element may be positioned in the forefoot region.

[0026] The chamber may extend from a lateral side to a medial side of the sole structure, the first tether element may be positioned adjacent one of the lateral side and the medial side, and the second tether element may be positioned in a central region of the sole structure between the lateral side and the medial side.

[0027] A fluid may be located within the interior cavity, and the fluid may be pressurized to apply an outward force to the barrier and induce tension in the first tether element and the second tether element.

[0028] Each of the first tether element and the second tether element may include a sheet having a two-dimensional configuration.

[0029] Each of the first tether element and the second tether element may include a tether having a one-dimensional configuration.

[0030] The first tether element may include a first tie that is securable to the first portion of the chamber, a second tie that is securable to the second portion of the chamber, and at least one tether that extends between the first tie and the second tie.

[0031] The first tether element may include: (a) a first plate positioned within the interior cavity and secured to the first portion of the chamber, (b) a second plate positioned within the interior cavity and secured to the second portion of the chamber, and (c) a plurality of tethers connected to the first plate and the second plate and extending between the first plate and the second plate.

[0032] The first plate may extend adjacent at least 50% of the first portion of the chamber, and the first plate may be contoured to have a non-planar configuration.

[0033] The tether element may include a first sheet and a second sheet, the first sheet may be secured to the first portion of the barrier, the second sheet may be secured to the second portion of the barrier, and the first sheet and the second sheet may be in contact with and connected to each other.

[0034] Yet another aspect of the present invention provides an article of footwear having an upper and a sole structure secured to the upper, at least one of the upper and the sole structure comprising a chamber, the chamber comprising:

[0035] an outer barrier formed of a polymeric material and defining an interior cavity, the barrier having (a) a first portion forming a first surface of the chamber and (b) a second portion forming an opposing second surface of the chamber;

[0036] a first plate positioned within the interior cavity and secured to the first portion of the chamber, the first plate extending adjacent at least 50% of the first portion of the chamber;

[0037] a second plate located within the interior cavity and secured to the second portion of the chamber; and

[0038] A plurality of tethers are connected to the first plate and the second plate and extend between the first plate and the second plate.

[0039] A fluid may be located within the interior cavity, and the fluid may be pressurized to apply an outward force to the first plate and the second plate and induce tension in the tether.

[0040] At least a portion of the first plate may be contoured to have a non-planar configuration.

[0041] The portion of the first plate may be located in a heel area of ​​the sole structure.

[0042] The tether may have a one-dimensional configuration.

[0043] The first portion of the tether may have a greater length than the second portion of the tether.

[0044] The first plate and the second plate may be formed from a polymer material having a greater stiffness than the polymer material of the barrier.

[0045] Yet another aspect of the present invention provides an article of footwear having an upper and a sole structure secured to the upper, at least one of the upper and the sole structure comprising a chamber, the chamber comprising:

[0046] an outer barrier formed of a polymeric material and defining an interior cavity, the barrier having (a) a first portion forming a first surface of the chamber and (b) a second portion forming an opposing second surface of the chamber; and

[0047] A tether element is positioned within the interior cavity and has a first tie secured to the first portion of the chamber, a second tie secured to the second portion of the chamber, and at least one tether extending between the first tie and the second tie.

[0048] A fluid may be located within the interior cavity, and the fluid may be pressurized to apply an outward force to the barrier and induce tension in the tether element.

[0049] The first and second ties may be formed from a polymer material which may be bonded to the barrier.

[0050] The article of footwear may also include a plurality of additional tether elements, a first set of the additional tether elements may have a first length, and a second set of the additional tether elements may have a second length, the first length may be greater than the second length.

[0051] The chamber may extend from a forefoot region to a heel region of the sole structure, at least a portion of the first set may be positioned in the heel region, and at least a portion of the second set may be positioned in the forefoot region.

[0052] The chamber may extend from a lateral side to a medial side of the sole structure, at least a portion of the first group may be positioned adjacent to one of the lateral side and the medial side, and at least a portion of the second group may be positioned in a central region of the sole structure between the lateral side and the medial side.

[0053] Yet another aspect of the present invention provides an article of footwear having an upper and a sole structure secured to the upper, at least one of the upper and the sole structure comprising a chamber, the chamber comprising:

[0054] an outer barrier formed of a polymeric material and defining an interior cavity, the barrier having (a) a first portion forming a first surface of the chamber and (b) a second portion forming an opposing second surface of the chamber; and

[0055] A tether element is positioned within the interior cavity and includes a first sheet secured to the first portion of the barrier and a second sheet secured to the second portion of the barrier, the first sheet and the second sheet being in contact with and connected to each other.

[0056] A fluid may be located within the interior cavity, and the fluid may be pressurized to apply an outward force to the barrier and induce tension in the tether element.

[0057] The first sheet and the second sheet may be formed from at least one of a fabric and a polymer layer.

[0058] The periphery of the first sheet may be connected to the periphery of the second sheet, the central region of the first sheet may be secured to the first portion of the barrier, and the central region of the second sheet may be secured to the second portion of the barrier.

[0059] The first sheet and the second sheet may have a circular shape.

[0060] The first sheet and the second sheet may be strips of material, a first end of the first sheet being securable to the first portion of the barrier and a second end of the first sheet being securable to the second sheet.

[0061] The first sheet may include a cutout and a peripheral portion, the cutout may define an overhang portion, the peripheral portion may be secured to the first portion of the barrier, and the overhang may be secured to the second sheet.

[0062] The article of footwear may also include a plurality of additional tether elements, a first set of the additional tether elements may have a first length, and a second set of the additional tether elements may have a second length, the first length may be greater than the second length.

[0063] The chamber may extend from a forefoot region to a heel region of the sole structure, at least a portion of the first set may be positioned in the heel region, and at least a portion of the second set may be positioned in the forefoot region.

[0064] The chamber may extend from a lateral side to a medial side of the sole structure, at least a portion of the first group may be positioned adjacent to one of the lateral side and the medial side, and at least a portion of the second group may be positioned in a central region of the sole structure between the lateral side and the medial side.

[0065] The barrier may be positioned in a midsole of the article of footwear.

[0066] Yet another aspect of the present invention provides a chamber for use in an article of footwear, comprising:

[0067] an outer barrier formed of a polymeric material and having a first surface and a second surface, the second surface opposing the first surface and cooperating with the first surface to define an interior cavity; and

[0068] A tether element is arranged in the internal cavity and extends between the first surface and the second surface and includes a first sheet and a second sheet, wherein the first sheet has a first cutout and a first peripheral portion fixed to the first surface, the first cutout defines a first pendant extending from the first peripheral portion toward the second surface, the second sheet has a second cutout and a second peripheral portion fixed to the second surface, the second cutout defines a second pendant extending from the second peripheral portion toward the first surface and in contact with the first pendant, the first pendant is offset from the second pendant and connected to the second pendant to impart an oblique orientation on the first pendant and the second pendant.

[0069] At least one of the first overhang and the second overhang may include a barrier material that may inhibit bonding between the first overhang and the outer barrier and inhibit bonding between the second overhang and the outer barrier.

[0070] The article of footwear may also include a barrier material disposed between the first overhang and the external barrier to inhibit the first overhang from bonding to the external barrier, and a barrier material disposed between the second overhang and the external barrier to inhibit the second overhang from bonding to the external barrier.

[0071] The first sheet may include a plurality of first overhangs and the second sheet may include a plurality of second overhangs, and the plurality of first overhangs may be attached to respective ones of the plurality of second overhangs.

[0072] The plurality of first overhangs and the plurality of second overhangs may include substantially the same length to provide an outer barrier having a substantially constant thickness between the first surface and the second surface.

[0073] The plurality of first overhangs and the plurality of second overhangs may include different lengths along the length of the outer barrier to provide an outer barrier having different thicknesses between the first surface and the second surface.

[0074] The first sheet may include a plurality of first cutouts, and the plurality of first cutouts may respectively form the plurality of first overhangs from the first sheet.

[0075] The second sheet may include a plurality of second cutouts, and the plurality of second cutouts may respectively form the plurality of second overhangs from the second sheet.

[0076] The external barrier may be positioned in a midsole of the article of footwear.

[0077] The first sheet may be attached to the second sheet in a region between the first surface and the second surface.

[0078] The first sheet and the second sheet may each have a circular cross-section along their entire length.

[0079] The first sheet and the second sheet may cooperate to provide a structure having a circular cross-section.

[0080] The first sheet has a central region connected to the first surface and may include a circular cross-section that increases in diameter in a direction extending from the first surface toward the second surface and terminates at a distal end of the first sheet.

[0081] The second sheet has a central area connected to the second surface and may include a circular cross-section that increases in diameter in a direction extending from the second surface toward the first surface and terminates at a distal end of the second sheet.

[0082] The distal end of the first sheet may be attached to the distal end of the second sheet in a region between the first surface and the second surface.

[0083] The first sheet and the second sheet may be one of a fabric sheet and a polymer sheet.

[0084] The external barrier may be positioned in a midsole of the article of footwear.

[0085] The distal end of the first sheet may be attached to the distal end of the second sheet.

[0086] The first sheet and the second sheet may cooperate to provide a structure having a circular cross-section.

[0087] The first sheet may be attached to the first surface and may include a circular configuration.

[0088] The second sheet may be attached to the second surface and may include a rounded configuration.

[0089] The first sheet may be opposite to the second sheet.

[0090] The first sheet and the second sheet may be one of a fabric sheet and a polymer sheet.

[0091] The external barrier may be positioned in a midsole of the article of footwear.

[0092] The article of footwear may also include an upper plate attached to the first surface and a lower plate attached to the second surface, the upper plate and the lower plate being separate from one another.

[0093] The tether may extend between the upper plate and the lower plate.

[0094] The tether may be secured to the upper panel and the lower panel.

[0095] Both the upper plate and the lower plate may be formed of a material having a greater rigidity than a material forming the barrier.

[0096] The barrier may be pressurized to place the tether in tension.

[0097] The barrier may be positioned in a midsole of the article of footwear.

[0098] The tether may be formed of a single strand that is repeatedly passed through the upper plate and the lower plate.

[0099] The chamber includes a plurality of tethers which may be formed from a single strand extending through the upper plate and through the lower plate.

[0100] A portion of the strand may run along a surface of the upper plate between the upper plate and the first surface.

[0101] A portion of the strand may run along the surface of the lower plate between the lower plate and the second surface.

[0102] The article of footwear may also include a restriction disposed between the upper plate and the first surface and a restriction disposed between the lower plate and the second surface.

[0103] The tether may be attached to the restraint disposed between the upper plate and the first surface and may be attached to the restraint disposed between the lower plate and the second surface.

[0104] The restricting member may be a disc.

[0105] Both the upper plate and the lower plate may be formed of a material having a greater rigidity than a material forming the barrier.

[0106] The barrier may be positioned in a midsole of the article of footwear.

[0107] The ends of the tether may include enlarged areas that are received within the upper and lower panels, respectively.

[0108] Both the upper plate and the lower plate may be formed of a material having a greater rigidity than a material forming the barrier.

[0109] The barrier may be positioned in a midsole of the article of footwear.

[0110] The advantages and features of the novel characteristics of the present invention are particularly pointed out in the appended claims. However, in order to obtain an improved understanding of the advantages and features of the novel characteristics, reference may be made to the following description and the descriptive contents and drawings that set forth various configurations and concepts related to the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0111]

[0011] Both the foregoing summary and the following detailed description will be better understood when read in conjunction with the appended drawings.

[0112] Figure 1 is a lateral side view of the article of footwear.

[0113] Figure 2 is a medial side view of the article of footwear.

[0114] Figure 3 Is it Figure 2 A cross-sectional view of the article of footwear defined by section line 3-3.

[0115] Figure 4 is a perspective view of a first compartment of an article of footwear.

[0116] Figure 5 It is an exploded perspective view of the first chamber.

[0117] Figure 6 is a side view of the first chamber.

[0118] Figure 7 is an exploded side view of the first chamber.

[0119] Figures 8A-8B Is it Figure 4 A cross-sectional view of the first chamber defined by section lines 8A and 8B.

[0120] Figures 9A-9D is with Fig. 8A 0 corresponds to a partial cross-sectional view of the enlarged area in FIG. 1 and describes a further configuration of the first chamber.

[0121] Fig. 10A and 10B is with Figure 8B The corresponding cross-sectional view and the forces acting on the first chamber are described.

[0122] Figures 11A-11C is a perspective view illustrating another configuration of the first chamber.

[0123] Figures 12A-12N is with Figure 8B A corresponding cross-sectional view and further configuration of the first chamber are described.

[0124] Fig.13 This is a perspective view of the second room.

[0125] Fig.14 It is an exploded perspective view of the second chamber.

[0126] Fig.15 is a side view of the second chamber.

[0127] Fig.16 is an exploded side view of the second chamber.

[0128] Fig.17A and 17B Is it Fig.13 A cross-sectional view of the second chamber defined by section lines 17A and 17B.

[0129] Figures 18A-18D is with Fig.17A A corresponding cross-sectional view and further configuration of the second chamber are described.

[0130] Fig.19 This is a perspective view of the third room.

[0131] Fig. 20 This is an exploded perspective view of the third room.

[0132] Fig.21 This is a side view of the third chamber.

[0133] Fig. 22 It is an exploded side view of the third chamber.

[0134] Fig.23A and 23B Is it Fig.19 A cross-sectional view of the third chamber defined by section lines 23A and 23B.

[0135] Figures 24A-24D is with Fig.23A The corresponding cross-sectional view and further configuration of the third chamber are described.

[0136] Fig.25 This is a perspective view of the fourth room.

[0137] Fig.26 This is an exploded perspective view of the fourth room.

[0138] Fig. 27 This is a side view of the fourth room.

[0139] Fig.28 It is an exploded side view of the fourth chamber.

[0140] Fig.29A and 29B Is it Fig.25 A cross-sectional view of the fourth chamber defined by section lines 29A and 29B.

[0141] Figures 30A-30C is with Fig.29A A corresponding cross-sectional view and further configuration of the fourth chamber are described. DETAILED DESCRIPTION

[0142] The following discussion and accompanying drawings disclose articles of footwear and a variety of fluid-filled chambers that may be incorporated into footwear. Concepts associated with the chambers are disclosed with reference to footwear suitable for running. However, the chambers are not limited to footwear designed for running, but may be used for a variety of athletic footwear types, including, for example, basketball shoes, cross-training shoes, cycling shoes, football shoes, soccer shoes, tennis shoes, and hiking boots. The chambers may also be used for footwear types that are generally considered non-athletic, including dress shoes, loafers, sandals, and boots. Therefore, in addition to the specific types discussed in the following materials and described in the accompanying drawings, the concepts disclosed herein may also be applied to a variety of footwear types. The chambers may also be used for a variety of other products, such as backpack straps, yoga mats, seat cushions, and protective clothing.

[0143] General Footwear Construction

[0144] Footwear 10 in Figure 1-3 1 and 2. The footwear 10 is described as including an upper 20 and a sole structure 30. For reference purposes, footwear 10 can be divided into three basic regions: a forefoot region 11, a midfoot region 12, and a heel region 13, as shown in FIG. Figure 1 and 214 and 15. The footwear 10 also includes a lateral side 14 and a medial side 15. The forefoot region 11 generally includes a portion of the footwear 10 corresponding to the toes and the joints connecting the phalanges and the metatarsals. The midfoot region 12 generally includes a portion of the footwear 10 corresponding to the arch region of the foot, and the heel region 13 corresponds to the rear region of the foot including the calcaneus. The lateral side 14 and the medial side 15 extend through each of the regions 11-13 and correspond to the opposite sides of the footwear 10. The regions 11-13 and the sides 14-15 do not attempt to precisely delimit the regions of the footwear 10. Instead, the regions 11-13 and the sides 14-15 are intended to represent the approximate regions of the footwear 10 to provide assistance in the following discussion. In addition to the footwear 10, the regions 11-13 and the sides 14-15 may also be applied to the upper 20, the sole structure 30 and its individual elements.

[0145] The upper 20 is described as having a fairly conventional structure incorporating a variety of material elements (e.g., fabric, foam, leather, and synthetic leather), which are stitched or glued together to form an interior space for firmly and comfortably accommodating the foot. The material elements can be selected and positioned relative to the upper 20 to selectively impart properties such as durability, breathability, wear resistance, flexibility, and comfort. The ankle opening 21 in the heel region 13 provides an entrance to the interior space. In addition, the upper 20 may include a shoelace 22, which is used in a conventional manner to change the size of the interior space, thereby fixing the foot in the interior space, and facilitating the foot to enter the interior space and move out of the interior space. The shoelace 22 may extend through the hole in the upper 20, and the tongue portion of the upper 20 may extend between the interior space and the shoelace 22. Considering that the various aspects of this discussion are primarily related to the sole structure 30, the upper 20 may present the general structure discussed above or the general structure of any other conventional or unconventional upper in fact. Thus, the structure of upper 20 may vary significantly within the scope of the present invention.

[0146] The sole structure 30 is fixed to the upper 20 and has a structure extending between the upper 20 and the ground. In addition to attenuating ground reaction forces (i.e., providing cushioning for the foot), the sole structure 30 can also provide traction, impart stability, and limit various foot movements such as pronation. The main elements of the sole structure 30 are the midsole element 31, the outsole 32, and the chamber 33. The midsole element 31 is fixed to the lower area of ​​the upper 20 and can be formed by a variety of polymer foam materials (e.g., polyurethane or ethylene vinyl acetate foam) extending through each of the regions 11-13 and between the sides 14 and 15. In addition, the midsole element 31 at least partially encapsulates or accommodates the chamber 33, which will be discussed in more detail below. The outsole 32 is fixed to the lower surface of the midsole element 31 and can be formed by a textured, durable and wear-resistant material (e.g., rubber) that forms the ground contact portion of the footwear 10. In addition to midsole element 31, outsole 32, and chamber 33, sole structure 30 may also incorporate one or more support members, modifiers, or reinforcing structures that, for example, further enhance the ground reaction force attenuation properties of sole structure 30 or the performance properties of footwear 10. Sole structure 30 may also incorporate a sockliner 34, such as in Figure 3 As described in , sockliner 34 is located in a lower portion of the void in upper 20 and is positioned to contact a plantar (ie, lower) surface of the foot to enhance the comfort of footwear 10 .

[0147] When chamber 33 is incorporated into sole structure 30, chamber 33 has a shape that fits within the perimeter of midsole element 31 and extends through heel region 13, into midsole region 12, and also from lateral side 14 to medial side 15. Although chamber 33 is described as being exposed through the polymer foam material of midsole element 31, in some configurations of footwear 10, chamber 33 may be entirely encapsulated within midsole element 31. When the foot is positioned within upper 20, chamber 33 extends under the heel region of the foot to attenuate ground reaction forces generated when sole structure 30 is compressed between the foot and the ground during various ambulatory activities such as running and walking. In some configurations, chamber 33 may protrude outwardly from midsole element 31 or may extend further into midsole region 12 and may also extend forwardly into forefoot region 11. Thus, the shape and size of chamber 33 may vary significantly to extend through multiple regions of footwear 10. Furthermore, any of a variety of other chambers 100 , 200 , and 300 (disclosed in greater detail below) may be used in place of chamber 33 of footwear 10 .

[0148] First room structure

[0149] exist Figure 4-8BThe main components of chamber 33, described separately in FIG. 3 , are barrier 40 and tether element 50. Barrier 40 forms the exterior of chamber 33 and (a) defines an interior cavity containing pressurized fluid and tether element 50 and (b) provides a durable sealed barrier for retaining pressurized fluid within chamber 33. The polymer material of barrier 40 includes a first or upper barrier portion 41, an opposing second or lower barrier portion 42, and a sidewall barrier portion 43 surrounding the periphery of chamber 33 and extending between barrier portions 41 and 42. Tether element 50 is located within the interior cavity and has a configuration that includes a first or upper plate 51, an opposing second or lower plate 52, and a plurality of tethers 53 extending between plates 51 and 52. Whereas upper plate 51 is secured to the inner surface of upper barrier portion 41, lower plate 52 is secured to the inner surface of lower barrier portion 42. For example, adhesive bonding or thermal bonding may be used to secure tether element 50 to barrier 40.

[0150] In manufacturing chamber 33, a pair of polymer sheets may be molded and bonded during a thermoforming process to define barrier portions 41-43. More specifically, the thermoforming process (a) imparts a shape to one of the polymer sheets so as to form upper barrier portion 41, (b) imparts a shape to the other of the polymer sheets so as to form lower barrier portion 42 and sidewall barrier portion 43, and (c) forms a peripheral bond 44 that connects the periphery of the polymer sheets and extends around the upper region of sidewall barrier portion 43. The thermoforming process may also position tether element 50 within chamber 33 and bond tether element 50 to each of barrier portions 41 and 42. Although substantially all of the thermoforming process may be performed through one mold, each of the multiple parts of the process may be performed separately during the formation of chamber 33. Other processes utilizing blow molding, rotational molding, or bonding polymer sheets without thermoforming may also be used to manufacture chamber 33.

[0151] After the thermoforming process, the fluid may be injected into the internal cavity and pressurized. The pressurized fluid applies an outward force to the barrier 40 and the plates 51 and 52, which tends to separate the barrier portions 41 and 42. However, the tether element 50 is fixed to each of the barrier portions 41 and 42 so as to maintain the intended shape of the chamber 33 when the chamber 33 is pressurized. More specifically, the tether 53 extends through the internal cavity and is placed in tension due to the outward force of the pressurized fluid acting on the barrier 40, thereby preventing the barrier 40 from expanding outwardly and maintaining the intended shape of the chamber 33. Whereas the peripheral joint 44 connects the polymer sheets to form a seal that prevents the fluid from escaping, the tether element 50 prevents the chamber 33 from expanding outwardly or otherwise expanding due to the pressure of the fluid. That is, the tether element 50 effectively limits the expansion of the chamber 33, thereby maintaining the intended shape of the surface of the barrier portions 41 and 42.

[0152] The fluid in chamber 33 may be pressurized to between 0 and 350 kilopascals (i.e., about 51 pounds per square inch) or more. In addition to air and nitrogen, the fluid may include any of the gases disclosed in Rudy's U.S. Pat. No. 4,340,626. In some configurations, chamber 33 may incorporate a valve or other structure that allows the wearer or other individual to adjust the pressure of the fluid.

[0153] A wide variety of polymeric materials may be used for barrier 40. In selecting a material for barrier 40, the material's engineering properties (e.g., tensile strength, stretch performance, fatigue characteristics, dynamic modulus, and loss tangent) and the material's ability to prevent diffusion of a fluid contained in barrier 40 may be considered. When barrier 40 is formed, for example, of thermoplastic urethane, barrier 40 may have a thickness of about 1.0 millimeters, but the thickness may range from, for example, 0.25 to 4.0 millimeters or more. Examples of polymeric materials that may be suitable for barrier 40 include polyurethanes, polyesters, polyester polyurethanes, and polyether polyurethanes, in addition to thermoplastic urethanes. Barrier 40 may also be formed of a material including alternating layers of thermoplastic polyurethane and ethylene-vinyl alcohol copolymer, as disclosed in U.S. Pat. Nos. 5,713,141 and 5,952,065 to Mitchell et al. A variation of this material may also be used in which a center layer is formed of ethylene-vinyl alcohol copolymer, layers adjacent to the center layer are formed of thermoplastic polyurethane, and outer layers are formed of regrind material of thermoplastic polyurethane and ethylene-vinyl alcohol copolymer. Another suitable material for barrier 40 is a flexible microlayer film comprising alternating layers of a gas barrier material and an elastomeric material, as disclosed in U.S. Pat. Nos. 6,082,025 and 6,127,026 to Bonk et al. Additional suitable materials are disclosed in U.S. Pat. Nos. 4,183,156 and 4,219,945 to Rudy. Further suitable materials include thermoplastic films containing crystalline materials as disclosed in U.S. Pat. Nos. 4,936,029 and 5,042,176 to Rudy and polyurethanes comprising polyester polyols as disclosed in U.S. Pat. Nos. 6,013,340, 6,203,868 and 6,321,465 to Bonk et al.

[0154] As discussed above, the tether element 50 includes an upper plate 51, an opposing lower plate 52, and a plurality of tethers 53 extending between the plates 51 and 52. Each of the plates 51 and 52 has a generally continuous and planar configuration. The tethers 53 are fixed to each of the plates 51 and 52 and space the plates 51 and 52 apart from each other. More specifically, the outward force of the pressurized fluid places the tethers 53 in tension and limits further outward movement of the plates 51 and 52 and the barrier portions 41 and 42.

[0155] Plates 51 and 52 impart a specific shape and contour to the upper and lower surfaces of chamber 33. Given that plates 51 and 52 present a planar configuration, the upper and lower surfaces of chamber 33 present a corresponding planar configuration. However, as discussed in more detail below, one or both of plates 51 and 52 may be contoured to impart a contoured configuration to the surfaces of chamber 33. While plates 51 and 52 may extend across substantially all of the length and width of chamber 33, in Fig. 8A and Figure 8B Middle panels 51 and 52 are described as being spaced inwardly from sidewall barrier portion 43. That is, panels 51 and 52 are described as extending across only a portion of the length and width of chamber 33. In this configuration, upper panel 51 extends adjacent to at least 50% of upper barrier portion 41, while lower panel 52 extends adjacent to at least 50% of lower barrier portion 42. Without tether element 50, chamber 33 would effectively bulge or otherwise expand into a generally circular shape. However, panels 51 and 52 would maintain the shape intended in barrier portions 41 and 42, and tether 53 limits the extent to which panels 51 and 52 can be separated. Extending panels 51 and 52 adjacent to at least 50% of barrier portions 41 and 42 ensures that the central area of ​​barrier portions 41 and 42 remains properly shaped, given that areas where panels 51 and 52 are not present may bulge or expand outwardly. Although peripheral areas of barrier portions 41 and 42 may bulge outwardly due to the absence of plates 51 and 52 , extending plates 51 and 52 adjacent at least 50% of barrier portions 41 and 42 to form chamber 33 will ensure that chamber 33 remains properly formed when used in footwear 10 .

[0156] A variety of structures may be used to secure the tether 53 to each of the plates 51 and 52. For example, as in Fig. 8A As depicted in the enlarged area of ​​FIG. 5 , the tether 53 is only secured to the upper plate 51 , and a similar configuration may be used to connect the tether 53 to the lower plate 52 . A variety of securing structures may also be used. Fig. 9A , the end of the tether 53 includes an enlarged area that can help anchor the tether 53 within the upper plate 51. Fig. 9B A configuration is described in which each tether 53 is fixed to a restraint 54 located on the upper surface of the upper plate 51 (i.e., between the upper plate 51 and the upper barrier portion 41). Each of the restraints 54 may have a disc configuration connected to the end of one of the tethers 53. Fig. 9C In another configuration described, a single tether 53 extends through the upper plate 51 at two locations and runs along the upper surface of the upper plate 51. Thus, multiple tethers 53 may be formed from a single strand or other element that repeatedly passes through the plates 51 and 52. As another example, each tether 53 may be secured to the lower surface of the upper plate 51 by adhesive or heat bonding, such as in Fig.9DThus, the tether 53 may be secured to the plates 51 and 52 in a variety of ways.

[0157] Plates 51 and 52 may be formed of a variety of materials, including a variety of polymer materials, composite materials, and metals. More specifically, plates 51 and 52 may be formed of polyethylene, polypropylene, thermoplastic polyurethane, polyether block amide, nylon, and blends of these materials. Composite materials may also be formed by incorporating glass fiber or carbon fiber into the polymer material disclosed above to enhance the overall strength of tether element 50. In some configurations of chamber 33, plates 51 and 52 may also be formed of aluminum, titanium, or steel. Although plates 51 and 52 may be formed of the same material (e.g., a composite material of polyurethane and carbon fiber), plates 51 and 52 may be formed of different materials (e.g., a composite material and aluminum, or polyurethane and polyethylene). As a related matter, the material forming barrier 40 typically has a smaller stiffness than plates 51 and 52. Given that the foot may compress barrier 40 during walking, running, or other walking activities, plates 51 and 52 may maintain greater rigidity and lower flexibility when the material forming plates 51 and 52 typically has a greater stiffness than the material forming barrier 40.

[0158] Tether 53 can be formed by any generally one-dimensional material. As used in the present invention, the term "one-dimensional material" or its variants are intended to include generally elongated materials presenting a length significantly greater than width and thickness. Therefore, the suitable material of tether 53 includes a variety of twisted wires, filaments, fibers, yarns, threads, cables or ropes formed by rayon, nylon, polyester, polyacrylic acid, silk products, cotton, carbon, glass, aramid (such as para-aramid fiber and meta-aramid fiber), ultra-high molecular weight polyethylene, liquid crystal polymers, copper, aluminum and steel. In view of the fact that the filament has an uncertain length and can be used as tether 53 individually, the fiber has a relatively short length and is usually subjected to a spinning or twisting process to produce a strand of appropriate length. The individual filaments for tether 53 can be formed by a material (that is, a single component filament) or multiple materials (that is, a bicomponent filament). Similarly, different filaments can be formed by different materials. As an example, the yarn used as tether 53 can include each kind of multiple filaments formed by the same material, can include each kind of multiple filaments formed by two or more different materials, or can include each kind of multiple filaments formed by two or more different materials.Similar conception is also applicable to clues, cables or ropes.The thickness of tether 53 can also change significantly, for example, from 0.03 millimeter to greater than 5 millimeters.Although one-dimensional material will usually have a cross section (for example, circular or square cross section) that is substantially the same as width and thickness, some one-dimensional material can have a width (for example, rectangular, elliptical or other elongated cross section) greater than thickness.Although larger width, if the length of material is significantly greater than the width and thickness of material, then material can be considered as one-dimensional.

[0159] The tethers 53 are arranged in columns extending longitudinally along the length of the panels 51 and 52. Figure 8B , nine tethers 53 extend across the width of chamber 33, and each of the nine tethers is in one of the longitudinally extending columns. Whereas the tethers 53 in the center column are oriented to have a generally vertical orientation, the tethers 53 in the more peripheral columns are oriented to be inclined. That is, tethers 53 may be secured to offset regions of plates 51 and 52 to produce an inclined orientation. The advantage of the inclined orientation of tethers 53 relates to the stability of footwear 10. Reference Fig. 10A , showing force 16 compressing sole structure 30 and pushing toward lateral side 14, which may be consistent with a cutting motion used in many athletic activities to move an individual from side to side. When force 16 deforms chamber 33 in this manner, tethers 53 adjacent medial side 15 are placed in tension due to their slope or angled orientation, as represented by multiple arrows 17. The tension in tethers 53 adjacent medial side 15 resists deformation of chamber 33, thereby resisting collapse of lateral side 14. Similarly, with reference to Fig. 10B , showing force 16 compressing sole structure 30 and pushing toward medial side 15, which may also be consistent with a sharp turn. When force 16 deforms chamber 33 in this manner, tethers 53 adjacent to lateral side 14 are placed in tension due to their slope or oblique orientation, as represented by multiple arrows 17. The tension in tethers 53 adjacent to lateral side 14 resists deformation of chamber 33, thereby resisting collapse of medial side 15. Thus, the oblique orientation of tethers 53 resists deformation of chamber 33, thereby enhancing the overall stability of footwear 10 during walking, running, or other ambulatory activities.

[0160] The overall shape of chamber 33 and the area of ​​footwear 10 in which chamber 33 is located may vary significantly. Fig.11A , chamber 33 has a generally circular configuration, such as may be located only within heel region 13. Fig. 11B , in which chamber 33 has a configuration extending through heel region 13 and midsole region 12. In this configuration, chamber 33 may replace midsole element 31, such that chamber 33 extends from lateral side 14 to medial side 15 and from upper 20 to outsole 32. Fig. 11C , chamber 33 has a shape that is mounted within the perimeter of sole structure 30 and extends under substantially the entire foot to correspond to the general contour of the foot. In this configuration, chamber 33 may also replace midsole element 31, such that chamber 33 extends from lateral side 14 to medial side 15, from heel area 13 to forefoot area 11, and from upper 20 to outsole 32.

[0161] While the structures of chamber 33 discussed above and illustrated in the accompanying figures provide suitable examples of configurations that may be used in footwear 10, a variety of other configurations may also be used. Fig. 12A , chamber 33 presents a tapered configuration. One way to impart the tapered configuration involves the relative length of tether 53. Whereas tether 53 is relatively long in areas of chamber 33 that present a greater thickness, tether 53 is relatively short in areas of chamber 33 that present a lesser thickness. Thus, by varying the length of tether 53, a taper or other feature can be incorporated into chamber 33. Fig. 12A The taper in FIG. 1 extends from the outer side 14 to the inner side 15. Fig. 11C In the configuration of chamber 33 described in , the taper may also extend from heel region 13 to forefoot region 11. Fig. 12B Another configuration of chamber 33 is described in , wherein a central region of chamber 33 is concave relative to the peripheral region. More specifically, upper plate 51 is contoured to have a non-planar configuration, thereby forming a recess in the central region. When incorporated into footwear 10, the recess can correspond to the location of the wearer's heel, thereby providing an area to securely accommodate the heel. Fig. 11C Similar recesses are also formed in the configuration of the chamber 33 described. In other configurations, the upper plate 51 may be contoured to form, for example, a convex arcuate support area. As a related matter, the relative length of the tether 53 extending through the Fig. 12B More specifically, the tethers 53 in the peripheral region have a longer length than the tethers 53 in the central region.

[0162] Various aspects related to the tether 53 may also be varied. Fig. 12C , each tether 53 is oriented obliquely. In some configurations, the tethers 53 may cross each other to form an x-shaped structure with opposite oblique orientations, such as in Fig.12D In addition, the spacing between adjacent tethers 53 can vary significantly, such as in Fig.12E , and tether 53 may not be present in some areas of chamber 33. Although tether 53 may be formed of any generally one-dimensional material, a variety of other materials or structures may be located between plates 51 and 52 to prevent barrier 40 from expanding outwardly and maintain the desired shape of chamber 33. For example, referring to Fig.12F, a variety of other tethers are located between plates 51 and 52. More specifically, fluid-filled members 55 and foam members 56 are bonded to plates 51 and 52, and both fluid-filled members 55 and foam members 56 can resist tension and compression. Fabric member 57 can also be used and can have the structure of a woven or knitted fabric. In some configurations, fabric member 57 can be a spacer knitted fabric. Truss member 58 can also be used in chamber 33 and has a semi-rigid polymer element structure extending between plates 51 and 52. In addition, a retractable member (telescoping member) 59 that collapses freely but also resists tension can also be used. Therefore, a variety of other materials or structures can be used with or in place of tether 53.

[0163] Although a single plate 51 and a single plate 52 may be used in chamber 33, some configurations may include multiple plates 51 and 52. Figure 12G , two plates 51 and two plates 52 are located within the interior cavity of barrier 40. An advantage of this construction is that each plate 51 can deflect independently when compressed by the foot. Fig.12H , wherein a central joint 45 connects barrier portions 41 and 42 in a central region of chamber 33. For example, joint 45 may form separate subchambers within chamber 33 that may be pressurized differently, thereby affecting the compressibility of different regions of chamber 33. As an additional aspect, each of plates 51 or each of plates 52 may be formed of different materials to impart different properties to various regions of chamber 33.

[0164] exist Fig.12I , includes a tether element 60 having an upper tie 61, a lower tie 62, and a tether 63. Whereas the upper tie 61 is fixed, bonded, or otherwise connected to the upper barrier portion 41, the lower tie 62 is fixed, bonded, or otherwise connected to the lower barrier portion 42. In addition, a tether 63 is connected to each of the ties 61 and 62 and extends through the interior cavity. In this construction, the tether 63 is placed in tension by the outward force of the pressurized fluid within the chamber 33. The ties 61 and 62 are similar to the plates 51 and 52, but are typically connected to a single tether 63 or a relatively small number of tethers 63, rather than to multiple tethers. Although the ties 61 and 62 can be circular disks having the same diameter, the ties 61 and 62 can have any shape or size. By varying the length of the tether 63, different contours can be imparted to the chamber 33. For example, Fig.12J The chamber 33 is described as having a conical configuration, while Figure 12K The chamber 33 is depicted as having a central recess. In other configurations, the tethers 61 and 62 may be offset from one another to impart an inclined configuration to the tether 63, such as in Figure 12L Described in .

[0165] Some configurations of chamber 33 may have a tether element 50 and one or more tether elements 60, such as in Figure 12M . That is, chamber 33 may have (a) a first region including tether element 50 and (b) a second region including a plurality of tether elements 60. If the tether element 50 and the single tether element 60 are of different sizes, the compression characteristics of chamber 33 are different in the region where tether element 50 is present and in the region where tether element 60 is present. More specifically, when a force is applied to a particular region, the deflection of chamber 33 may be different, depending on the type of tether element used. Therefore, both tether element 50 and tether element 60 may be used in chamber 33 to impart different compression characteristics to different regions of chamber 33.

[0166] As discussed above, chamber 33 may have (a) a first area including tether elements 50 and (b) a second area including multiple tether elements 60 to impart different compression characteristics to the first area and the second area of ​​chamber 33. As an example, multiple tether elements 60 may be used in lateral side 14 to impart greater deflection when the heel compresses sole structure 30, while tether elements 50 may be used in medial side 15 to impart more difficult deflection when the foot rolls or pronates toward medial side 15. As another example, multiple tether elements 60 may be used in heel area 13 to impart greater deflection when the heel compresses sole structure 30, while tether elements 50 may be used in forefoot area 11 to impart more difficult deflection. In other constructions, multiple tether elements 60 may be used in forefoot area 11 and tether elements 60 may be used in heel area 13. However, in any construction, tether elements 50 and multiple tether elements 60 may be used in combination to impart different compression characteristics to different areas of footwear 10. In addition, in Fig.12F Any of the additional tether element configurations shown in may be used in combination with one or more of tether elements 60 and tether element 50 to alter the compression characteristics of different regions of chamber 33 or other chambers.

[0167] Some conventional chambers utilize a bond between opposing surfaces to prevent the barrier from expanding outwardly and maintain the desired shape of the chamber. Typically, the bond forms an indentation or recess in the upper and lower surfaces of the chamber and has different compression characteristics than other areas of the chamber (i.e., areas without the bond). Fig.12N, chamber 33 has a configuration in which the area with multiple tether elements 60 forms an indentation in barrier portions 41 and 42. That is, barrier portions 41 and 42 form recesses in the area where ties 61 and 62 are secured to barrier 40. In some configurations, these recesses may be molded or otherwise formed in barrier portions 41 and 42, or barrier 40 may assume this shape due to the pressure of the fluid within barrier 40. In other configurations, a variety of other tensile members (e.g., foam members, spacer fabrics) may be used in place of tether elements 60.

[0168] Second room structure

[0169] The various configurations of chamber 33 discussed above provide examples of fluid-filled chambers that may be incorporated into footwear 10 or other articles of footwear. A variety of other fluid-filled chambers, including chamber 100, may also be incorporated into footwear 10 or other articles of footwear. Figure 13-17B , chamber 100 has a barrier 110 and a plurality of tether elements 120. Barrier 110 forms the exterior of chamber 100 and defines an interior cavity for containing a pressurized fluid and tether elements 120. Barrier 110 includes a first or upper barrier portion 111, an opposing second or lower barrier portion 112, and a sidewall barrier portion 113 that extends around the periphery of chamber 100 and between barrier portions 111 and 112. In addition, barrier 110 includes a peripheral bond 114, which may not be present in some configurations. Tether elements 120 are located within the interior cavity and have a configuration such as a fabric or polymer sheet. For example, adhesive bonding or thermal bonding may be used to secure tether elements 120 to barrier 110. Any of the manufacturing processes, materials, fluids, fluid pressures, and other features of barrier 40 discussed above may also be used for barrier 110.

[0170] Tether element 120 is secured to each of barrier portions 111 and 112 to maintain the intended shape of chamber 100 when chamber 100 is pressurized. More specifically, tether element 120 extends through the interior cavity and is placed in tension by the outward force of the pressurized fluid acting on barrier 110, thereby preventing barrier 110 from expanding outwardly and maintaining the intended shape of chamber 100. That is, tether element 120 prevents chamber 100 from expanding outwardly or otherwise expanding due to the pressure of the fluid.

[0171] Although a variety of materials can be used, the tether element 120 can be formed by any generally two-dimensional material. As used in the present invention, the term "two-dimensional material" or its variants are intended to include generally flat materials that present a length and width that are significantly greater than the thickness. Therefore, suitable materials for the tether element 120 include, for example, various fabrics, polymer sheets, or a combination of fabrics and polymer sheets. Fabrics are usually made of fibers, filaments, or yarns, which (a) are directly produced by a fiber web to construct nonwovens and felts or (b) are formed by mechanically manipulating yarns to produce braided or knitted fabrics by combining, fusing, or interlocking. Fabrics can be incorporated into fibers arranged to impart unidirectional stretch or multidirectional stretch. Polymer sheets can be extruded, rolled, or otherwise formed by polymer materials to present a generally flat appearance. Two-dimensional materials can also include laminated or otherwise layered materials, which laminated or otherwise layered materials include two or more layers of fabrics, polymer sheets, or a combination of fabrics and polymer sheets. In addition to fabrics and polymer sheets, other two-dimensional materials can also be used for the tether element 120. In some configurations, mesh materials or perforated materials may also be used for tether element 120 .

[0172] Each of the tether elements 120 is formed from a single two-dimensional material element (e.g., a fabric or polymer sheet). In addition, each of the tether elements 120 has an upper end region 121, a lower end region 122, and a central region 123. Whereas the upper end region 121 is fixed, bonded, or otherwise connected to the upper barrier portion 111, the lower end region 122 is fixed, bonded, or otherwise connected to the lower barrier portion 112. In this configuration, the central region 123 extends through the interior cavity and is placed in tension by the outward force of the pressurized fluid within the chamber 100.

[0173] While the structure of chamber 100 discussed above and illustrated in the accompanying figures provides a suitable example of a configuration that may be used for footwear 10, a variety of other configurations may also be used. Fig.18A , tether element 120 is secured to the offset regions of barrier portions 111 and 112 to impart an oblique orientation to central region 123. More specifically, end regions 121 and 122 are secured to the offset positions to create a diagonal or oblique orientation in central region 123. As discussed above, the oblique orientation resists deformation in chamber 100, thereby improving the overall stability of footwear 100 during walking, running, or other ambulatory activities. Fig.18B , a single tether element 120 is connected to barrier portions 111 and 112 at multiple locations and has a zigzag configuration within chamber 100. By varying the length of tether element 120, a variety of profiles can be imparted to chamber 100. For example, Fig.18C A chamber 100 is described as having a tapered configuration, and Fig.18DA chamber 100 is depicted having a central recess. Each of these profiles is formed by selectively using tether elements 120 having different lengths.

[0174] The third room structure

[0175] In the various configurations of chamber 100 discussed above, each of tether elements 120 is formed from a single two-dimensional material element. In some configurations, two or more two-dimensional material elements may be used to form the tether elements. Figure 19-23B , describes a chamber 200 having a barrier 210 and a plurality of tether elements 220. The barrier 210 forms the exterior of the chamber 200 and defines an interior cavity for containing a pressurized fluid and the tether elements 220. The barrier 210 includes a first or upper barrier portion 211, an opposing second or lower barrier portion 212, and a sidewall barrier portion 213 that extends around the periphery of the chamber 200 and between the barrier portions 211 and 212. In addition, the barrier 210 includes a peripheral bond 214, which may not be present in some configurations. The tether elements 220 are located within the interior cavity and are formed of at least two two-dimensional material elements, such as fabrics or polymer sheets. For example, adhesive bonding or thermal bonding may be used to secure the tether elements 220 to the barrier 210.

[0176] Tether element 220 is fixed to each of barrier portions 211 and 212 to maintain the intended shape of chamber 200 when chamber 200 is pressurized. More specifically, tether element 220 extends through the interior cavity and is placed in tension by the outward force of the pressurized fluid acting on barrier 210, thereby preventing barrier 210 from expanding outward and maintaining the intended shape of chamber 200. That is, tether element 220 prevents chamber 200 from expanding outward or otherwise expanding due to the pressure of the fluid. Each of tether elements 220 is formed by an upper sheet 221 connected to upper barrier portion 211 and a lower sheet 222 connected to lower barrier portion 212. Each of sheets 221 and 222 has an incision or cut that forms a central tab 223. Given that the peripheral areas of sheets 221 and 222 are connected to barrier 210, tab 223 is not fixed and extends into the interior cavity. The end regions of the two overhangs 223 contact and connect to each other, thereby fixing the sheets 221 and 222 together. When the chamber 200 is pressurized, the overhangs 223 are placed in tension and extend through the interior cavity, thereby preventing the chamber 200 from expanding outward or otherwise expanding due to the pressure of the fluid.

[0177] Any of the manufacturing processes, materials, fluids, fluid pressures, and other features of barrier 40 discussed above may also be used for barrier 210. In order to prevent overhang 223 from bonding to barrier 210, a blocker material may be used. More specifically, a material that inhibits bonding between overhang 223 and barrier 210 (e.g., polyethylene terephthalate, silicone, polytetrafluoroethylene) may be used to ensure that overhang 223 remains free to extend through the interior cavity between barrier portions 211 and 212. In many configurations, the blocker material may be located on overhang 223, but may also be located on the surface of barrier 210 or may be, for example, a film extending between overhang 223 and the surface of barrier 210.

[0178] While the structure of chamber 200 discussed above and illustrated in the accompanying figures provides a suitable example of a configuration that may be used for footwear 10, a variety of other configurations may also be used. Fig.24A , the tether element 220 is secured to the offset regions of the barrier portions 211 and 212 to impart an oblique orientation. Fig. 24B , a single sheet 221 and a single sheet 222 define a plurality of overhangs 223. Although each of sheets 221 and 222 may form a single overhang 223, sheets 221 and 222 may also form a plurality of overhangs 223. By varying the length of overhangs 223, a variety of contours may be imparted to chamber 200. For example, Fig.24C A chamber 200 is described as having a tapered configuration, and Fig.24D A chamber 200 is depicted having a central recess. Each of these profiles is formed by selectively using overhangs 223 having different lengths.

[0179] The fourth room structure

[0180] exist Figure 25-29B , wherein two or more two-dimensional material elements are used to form tether elements. Chamber 300 has a barrier 310 and a plurality of tether elements 320. Barrier 310 forms the exterior of chamber 300 and defines an interior cavity for containing a pressurized fluid and tether elements 320. Barrier 310 includes a first or upper barrier portion 311, an opposing second or lower barrier portion 312, and a sidewall barrier portion 313 that extends around the periphery of chamber 300 and between barrier portions 311 and 312. In addition, barrier 310 includes a peripheral bond 314, which may not be present in some configurations. Tether elements 320 are located within the interior cavity and are formed by at least two two-dimensional material elements (e.g., fabrics or polymer sheets). For example, adhesive bonding or thermal bonding may be used to secure tether elements 320 to barrier 310.

[0181] Tether element 320 is fixed to each of barrier portions 311 and 212 to maintain the intended shape of chamber 300 when chamber 300 is pressurized. More specifically, tether element 320 extends through the internal cavity and is placed in tension by the outward force of the pressurized fluid acting on barrier 310, thereby preventing barrier 310 from expanding outward and maintaining the intended shape of chamber 300. That is, tether element 320 prevents chamber 300 from expanding outward or otherwise expanding due to the pressure of the fluid. Each of tether elements 320 is formed by an upper sheet 321 connected to upper barrier portion 311 and a lower sheet 322 connected to lower barrier portion 312. Each of sheets 321 and 322 has a circular or disc-shaped configuration. Whereas the peripheral areas of sheets 321 and 322 are connected to each other, the central areas are connected to barrier portions 311 and 312. When placed in tension, sheets 321 and 322 can expand to form the shapes seen in the respective figures. When chamber 300 is pressurized, sheets 321 and 322 are placed in tension and extend across the interior cavity, thereby preventing chamber 300 from expanding outwardly or otherwise expanding due to the pressure of the fluid.

[0182] Any of the manufacturing processes, materials, fluids, fluid pressures, and other features of barrier 40 discussed above may also be used for barrier 310. In order to prevent the peripheral regions of sheets 321 and 322 from being bonded to barrier 310, a barrier material may be used. More specifically, a material that inhibits bonding between the peripheral regions of sheets 321 and 322 and barrier 310 may be used to ensure that sheets 321 and 322 remain free to extend through the interior cavity.

[0183] While the structure of chamber 300 discussed above and illustrated in the accompanying figures provides a suitable example of a configuration that may be used for footwear 10, a variety of other configurations may also be used. Fig. 30A , the peripheral regions of sheets 321 and 322 are bonded to barrier 310, whereas the central regions of sheets 321 and 322 are bonded to each other. By varying the diameter or other dimensions of sheets 321 and 322, a variety of profiles can be imparted to chamber 300. For example, Fig. 30B Chamber 300 is described as having a tapered configuration, but a central recess or other contours may also be formed by selectively varying the dimensions of sheets 321 and 322 .

[0184] in conclusion

[0185] The above discussion and various figures disclose a variety of fluid-filled chambers that can be used in footwear 10 or other articles of footwear, as well as a variety of other products, such as straps, yoga mats, seat cushions, and protective clothing. Although many of the concepts related to barrier and tensile elements are discussed separately, fluid-filled chambers can benefit from a combination of these concepts. That is, multiple types of tether elements can be used in a single chamber to provide different properties to different areas of the chamber. For example, Fig. 30CA configuration is described in which chamber 300 includes each of tensile elements 60, 120, 220, and 320 as well as fluid-filled members 55, foam members 56, and truss members 58. While tensile elements 60, 120, 220, and 320 may have a configuration that collapses when chamber 300 is compressed, members 55, 56, and 58 may form a more rigid structure that resists collapse. Thus, such a configuration may be used to impart compressibility to one area of ​​chamber 300 while limiting compressibility in other areas. Thus, multiple types of tensile elements may be used to impart different properties to a fluid-filled chamber.

[0186] The present invention is disclosed above and in the accompanying drawings by reference to a variety of configurations. However, the purpose of this disclosure is to provide examples of various features and concepts related to the present invention, but not to limit the scope of the invention. Those skilled in the relevant art will appreciate that various changes and modifications may be made to the above configurations without departing from the scope of the invention as defined in the appended claims.

Claims

1. A chamber for use in an article of footwear, the chamber comprising: an outer barrier formed of a polymer material and having a first surface and a second surface spaced apart from and opposite the first surface to define an interior cavity; and A tether element is arranged in the internal cavity and extends between the first surface and the second surface and includes a first piece and a second piece, the first piece has a circular structure and the central area of ​​the first piece is fixed to the first surface, the second piece has a circular structure and the central area of ​​the second piece is fixed to the second surface, and the outer peripheries of the respective first and second pieces are connected together. 2 . The chamber of claim 1 , wherein the first sheet is attached to the second sheet in a region between the first surface and the second surface.

3. The chamber of claim 2, wherein the first sheet and the second sheet each have a circular cross-section along their entire length.

4. The chamber of claim 2, wherein the first sheet and the second sheet cooperate to provide a structure having a circular cross-section.

5. The chamber of claim 1, wherein the first sheet comprises a circular cross-section that increases in diameter in a direction extending from the first surface toward the second surface and terminates at a distal end of the first sheet.

6. The chamber of claim 5, wherein the second sheet comprises a circular cross-section that increases in diameter in a direction extending from the second surface toward the first surface and terminates at a distal end of the second sheet.

7. The chamber of claim 6, wherein the distal end of the first sheet is attached to the distal end of the second sheet in a region between the first surface and the second surface.

8. The chamber of claim 1, wherein the first sheet and the second sheet are one of fabric sheets and polymer sheets.

9. The chamber of claim 1, wherein the exterior barrier is positioned in a midsole of the article of footwear.

10. A chamber for use in an article of footwear, the chamber comprising: an outer barrier formed of a polymer material and having a first surface and a second surface spaced apart from and opposite the first surface to define an interior cavity; and A tether element is arranged in the internal cavity and extends between the first surface and the second surface and includes a first sheet and a second sheet, the first sheet having a central area connected to the first surface and having a circular cross-section that increases in diameter in a direction extending from the first surface toward the second surface and terminates at a distal end of the first sheet, the second sheet having a central area connected to the second surface and having a circular cross-section that increases in diameter in a direction extending from the second surface toward the first surface and terminates at a distal end of the second sheet, the outer peripheries of the respective first and second sheets being connected together.

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