EP3267826A1 - Semelles auxétiques dotées de revêtements internes ou externes correspondants - Google Patents
Semelles auxétiques dotées de revêtements internes ou externes correspondantsInfo
- Publication number
- EP3267826A1 EP3267826A1 EP15820997.3A EP15820997A EP3267826A1 EP 3267826 A1 EP3267826 A1 EP 3267826A1 EP 15820997 A EP15820997 A EP 15820997A EP 3267826 A1 EP3267826 A1 EP 3267826A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- auxetic
- liner
- article
- layer
- apertures
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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Classifications
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B13/00—Soles; Sole-and-heel integral units
- A43B13/14—Soles; Sole-and-heel integral units characterised by the constructive form
- A43B13/18—Resilient soles
- A43B13/181—Resiliency achieved by the structure of the sole
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B13/00—Soles; Sole-and-heel integral units
- A43B13/02—Soles; Sole-and-heel integral units characterised by the material
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B13/00—Soles; Sole-and-heel integral units
- A43B13/02—Soles; Sole-and-heel integral units characterised by the material
- A43B13/12—Soles with several layers of different materials
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B13/00—Soles; Sole-and-heel integral units
- A43B13/14—Soles; Sole-and-heel integral units characterised by the constructive form
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B13/00—Soles; Sole-and-heel integral units
- A43B13/14—Soles; Sole-and-heel integral units characterised by the constructive form
- A43B13/18—Resilient soles
- A43B13/187—Resiliency achieved by the features of the material, e.g. foam, non liquid materials
Definitions
- Articles of footwear typically have at least two major components, an upper that provides the enclosure for receiving the wearer's foot, and a sole secured to the upper that is the primary contact to the ground or playing surface.
- the footwear may also use some type of fastening system, for example, laces or straps or a combination of both, to secure the footwear around the wearer's foot.
- the sole may comprise three layers - an inner sole, a midsole and an outer sole.
- the outer sole is the primary contact to the ground or the playing surface. It generally carries a tread pattern and/or cleats or spikes or other protuberances that provide the wearer of the footwear with improved traction suitable to the particular athletic, work or recreational activity, or to a particular ground surface.
- auxetic structure generally refers to a structure that, when it is placed under tension in a first direction, increases its dimensions in a direction that is orthogonal to the first direction.
- the auxetic structures are bi-directional such that they increase in length and width when stretched longitudinally and in width and length when stretched laterally, but do not increase in thickness.
- Such auxetic structures are characterized by having a negative Poisson's ratio.
- Such auxetic structures will generally have at least a monotonic relationship between the applied tension and the increase in the dimension orthogonal to the direction of the tension, that relationship need not be proportional or linear, and in general need only increase in response to increased tension.
- an article of footwear includes an upper and a sole.
- the sole may include an inner sole, a midsole and an outer sole.
- Embodiments of the sole include at least one layer made of an auxetic structure. This layer can be referred to as an "auxetic layer.”
- an activity such as running, turning, leaping or accelerating, that puts the auxetic layer under increased longitudinal or lateral tension
- the auxetic layer increases its length and width and thus provides improved traction, as well as absorbing some of the impact with the playing surface.
- embodiments can be adapted for many sport and recreational activities, including tennis and other racquet sports, walking, jogging, running, hiking, handball, training, running or walking on a treadmill, as well as team sports such as basketball, volleyball, lacrosse, field hockey and soccer.
- an embodiment of an article of footwear has a sole structure with an auxetic layer and a liner.
- the auxetic layer includes a pattern of apertures formed by sole elements surrounding the apertures.
- Each of the sole elements has a number of vertices.
- the sole elements are joined at their vertices, such that the sole elements can rotate with respect to one another about their vertices.
- the auxetic layer is characterized by having a lateral direction, a longitudinal direction and a vertical direction.
- the auxetic layer is configured to expand in the lateral direction and in the longitudinal direction when tension is applied to the auxetic layer in the lateral direction, and to expand in the lateral direction and the longitudinal direction when tension is applied to the auxetic layer in the longitudinal direction.
- the liner is disposed adjacent to and approximately parallel to the auxetic layer. The liner thus inhibits the introduction of debris into the apertures in the auxetic layer.
- an embodiment of an article of footwear has an auxetic layer and an auxetic liner.
- the auxetic layer includes a pattern of apertures formed by geometric features surrounding the apertures, and each of the geometric features has a number of vertices.
- the geometric features are joined at their vertices such that the vertices function as hinges that allow the geometric features to rotate with respect to each other.
- the auxetic layer and the auxetic liner are characterized by having a lateral direction, a longitudinal direction and a vertical direction. When a portion of the auxetic layer is under lateral tension, it expands in both the lateral direction and the longitudinal direction, and when a portion of the auxetic layer is under longitudinal tension it expands in both the longitudinal direction and the lateral direction.
- auxetic liner when a portion of the auxetic liner is under lateral tension, it expands in both the lateral direction and the longitudinal direction, and when a portion of the auxetic liner is under longitudinal tension it expands in both the longitudinal direction and the lateral direction.
- the auxetic liner is disposed on a first surface of the auxetic layer and mates with the auxetic layer.
- an embodiment of an article of footwear has an upper and a sole structure attached to the upper.
- the sole structure has an auxetic layer and a first liner.
- the auxetic layer has a pattern of apertures formed by geometric features surrounding the apertures. The geometric features are joined at their vertices such that they function as hinges thereby allowing the geometric features to rotate with respect to each other.
- the auxetic layer is characterized by having a lateral dimension and a longitudinal dimension.
- the auxetic layer When the auxetic layer is in an unstressed state, the auxetic layer is characterized by having an unstressed configuration with an unstressed longitudinal dimension and an unstressed lateral dimension, and when the auxetic layer is under tension, the auxetic layer has an expanded configuration with an expanded longitudinal dimension and an expanded lateral dimension, wherein the expanded longitudinal dimension is greater than the unstressed longitudinal dimension and wherein the expanded lateral dimension is greater than the unstressed lateral dimension.
- the auxetic layer When the auxetic layer is under tension, the first liner expands
- F!G. 1 is a schematic diagram of a bottom view of an embodiment of an article of footwear with an example of a sole that has an auxetic structure
- FIG. 2 is a schematic diagram illustrating the behavior of auxetic materials when tension is applied in a given direction
- FIG. 3 is an exploded view of the article of footwear of FIG. 1 ;
- FIG. 4 is a schematic diagram of an embodiment of an auxetic liner and an auxetic outsoie
- FIG. 5 is a schematic diagram of an embodiment showing how an auxetic liner fits into an auxetic outsoie
- FIG. 6 is a schematic diagram of a projection of an auxetic liner
- FIG. 7 is a schematic diagram showing a portion of an auxetic liner fitting into a corresponding portion of an auxetic outsoie
- FIG. 8 is a schematic diagram of an embodiment of an auxetic sole structure, showing the auxetic liner and a cross-section of an auxetic outsoie when the outsoie is not under tension;
- FIG. 9 is a schematic diagram of an embodiment of an auxetic sole structure, showing the auxetic liner and a cross-section of an auxetic outsoie when the outsoie is under longitudinal tension;
- FIG. 10 is a schematic diagram of an article of footwear illustrating the geometry of an auxetic structure in the heel region of the outsoie during a foot strike;
- FIG. 1 1 is a schematic diagram of an article of footwear illustrating the response of the auxetic structure in the forefoot region of the outsoie during a foot strike;
- FIG, 12 is a schematic diagram of an article of footwear illustrating the response of the auxetic structure in the midfoot region of the outsole strike;
- FIG. 13 is a schematic diagram showing a lateral cross-section of an embodiment of an article of footwear
- FIG. 14 is a schematic diagram showing a longitudinal cross-section of an embodiment of an article of footwear
- FIG. 15 is a schematic diagram illustrating another embodiment of an article of footwear
- FIG. 16 is a schematic diagram showing an exploded view of the embodiment of FIG. 15;
- FIG. 17 is a schematic diagram showing an exploded view of another embodiment of an article of footwear.
- FIG. 18 is a schematic diagram showing an exploded view of another embodiment of an article of footwear.
- FIG. 19 is a schematic diagram showing an exploded view of another embodiment of an article of footwear.
- footwear in the form of footwear such as running shoes, jogging shoes, tennis, squash or racquetball shoes, basketball shoes, sandals and flippers, the disclosures herein may be applied to a wide range of footwear.
- longitudinal direction refers to a direction extending a length (or longest dimension) of an article of footwear such as a sports or recreational shoe.
- lateral direction refers to a direction extending along a width of an article of footwear. The lateral direction may generally be perpendicular to the longitudinal direction.
- vertical direction refers to the direction that is normal to the plane of the sole of the article of footwear.
- sole structure also referred to simply as “sole”, herein shall refer to any combination of insole, midsole, outsole and/or liners that provides support for a wearer's foot and bears the surface that is in direct contact with the ground or playing surface, such as a single sole; a combination of an outsole and an inner sole; a combination of an outsole, a midsole and an inner sole, and a combination of one or more liners, an outsole, a midsole and/or an inner sole.
- FIG. 1 is a bottom perspective view of an embodiment of an article of footwear 100.
- Article of footwear 100 may include upper 101 and sole structure 200, also referred to hereafter simply as sole 200.
- Upper 101 has a heel region 105, an instep or midfoot region 104 and a forefoot region 103.
- Upper 101 may include an opening or throat 1 10 that allows the wearer to insert his or her foot into the footwear.
- upper 101 may also include laces 1 1 1 , which can be used to tighten or otherwise adjust upper 101 around a foot.
- sole structure 200 includes at least an outsole 230 that may be the primary ground-contacting surface.
- sole structure 200 may also have an inner sole or a midsole, or may have both an inner sole and a midsole.
- outso!e 230 may bear a tread pattern, or may have cleats, spikes or other ground-engaging protuberances.
- sole structure 200 has an outsole 230 that includes a plurality of apertures 231 (also referred to simply as apertures 231 ).
- plurality of apertures 231 could include polygonal apertures.
- each aperture could have any other geometry, including geometries with non-linear edges that connect adjacent vertices.
- apertures 231 appear as three-pointed stars (also referred to herein as triangular stars or as tri-stars), surrounded by plurality of sole elements 232 (also referred to simply as sole elements 232).
- sole elements 232 are triangular.
- the apertures may have other geometries and may be surrounded by sole elements having other geometries.
- the sole elements may be geometric features.
- the triangular features 232 shown in FIG. 1 are one example of such geometric features.
- Other examples of geometric features that might be used as sole elements are quadrilateral features, trapezoidal features, pentagonal features, hexagonal features, octagonal features, oval features and circular features.
- the joints at the vertices 233 function as hinges, allowing the triangular sole elements 232 to rotate as the sole is placed under tension. When a portion of the sole is under tension, this action allows the portion of the sole under tension to expand both in the direction under tension and in the direction in the plane of the sole that is orthogonal to the direction under tension.
- FIG. 2 shows schematically how the geometries of apertures 231 and their surrounding sole elements 232 result in the auxetic behavior of a portion of auxetic material 250 that forms outso!e 230.
- FIG. 2 illustrates the bi-directional expansion of a portion of an auxetic material 250 when it is under tension in one direction.
- the drawing at the top of FIG. 2 shows a portion of an auxetic material 250 that has a width W1 and a length L1 in its initial unstressed state, in its unstressed state, the portion of auxetic material 250 has apertures 231 surrounded by sole elements 232.
- each pair of sole elements 232 are joined at their vertices 233, leaving openings 234.
- the apertures 231 are triangular star-shaped apertures
- the sole elements are triangular features
- openings 234 are the points of triangular star-shaped apertures
- openings 234 may be characterized as having a relatively small acute angle when the portion of auxetic material 250 is not under tension
- FIG. 2 is a comparison of a portion of an embodiment of an auxetic material 250 in its initial unstressed state (shown in the top drawing) to a portion of that embodiment of an auxetic material 250 when it is under tension in a lengthwise direction (as shown in the bottom drawing).
- the application of tension in the direction shown by the arrows in the bottom drawing to auxetic material 250 rotates adjacent sole elements 232, which increases the relative spacing between adjacent sole elements
- the relative spacing between adjoining sole elements 232 increases with the application of tension. Because the increase in relative spacing occurs in all directions (due to the geometry of the original geometric pattern of apertures), this results in an expansion of the auxetic material along both the direction under tension, and along the direction orthogonal to the direction under tension.
- the auxetic material portion 250 in the initial or non-tensioned configuration (seen in the top drawing in FIG. 2), has an initial size L1 along one direction (e.g., the longitudinal direction) and an initial size W1 along a second direction that is orthogonal to the first direction (e.g., the lateral direction).
- L1 along one direction
- W1 an initial size W1 along a second direction that is orthogonal to the first direction (e.g., the lateral direction).
- the auxetic material portion 250 has an increased size L2 in the direction under tension and an increased size W2 in the direction that is orthogonal to the direction under tension.
- the expansion of auxetic material 250 is not limited to expansion in the direction under tension
- the sole structure has an auxetic layer that functions as an outsole because it is the ground-contacting component of the sole structure.
- the auxetic layer in the sole structure functions as a midsole, rather than as an outsole, i.e., the auxetic layer is not the ground-contacting component of the sole structure. Instead, the auxetic layer is the midsole in the sole structure that provides cushioning and absorbs impact forces when the article of footwear strikes the ground.
- an auxetic structure including an outsole or a midsole that includes an auxetic layer, may be tensioned in the longitudinal direction or in the lateral direction.
- an auxetic structure including an outsole or a midsole that includes an auxetic layer
- auxetic structures comprised of geometric apertures surrounded by geometric portions provides a structure that can expand along any first direction along which tension is applied, as well as along a second direction that is orthogonal to the first direction.
- the directions of expansion namely the first direction and the second direction, may generally be tangential to a surface of the auxetic structure.
- the auxetic structures discussed here may generally not expand substantially in a vertical direction that is associated with a thickness of the auxetic structure.
- each aperture in plurality of apertures 231 may have any kind of geometry.
- an aperture may have a polygonal geometry, including a convex and/or concave polygonal geometry.
- the geometry of the aperture may be characterized as a polygon with inwardly-pointing sides.
- the geometry of apertures 231 can be characterized as a triangle with sides that, instead of being straight, have an inwardly-pointing vertex at the midpoint of the side.
- the angles formed by these inwardly-pointing vertices are termed "reentrant" angles.
- the reentrant angle formed at these inwardly-pointing vertices may range from 179° (when the side is almost straight) to, for example, 120° or less.
- apertures 231 include, but are not limited to: regular polygonal shapes (e.g., triangular, rectangular, pentagonal, hexagonal, etc.) as well as irregular polygonal shapes or non-polygonal shapes.
- regular polygonal shapes e.g., triangular, rectangular, pentagonal, hexagonal, etc.
- Other geometries could be described as being quadrilateral, pentagonal, hexagonal, heptagonal, and octagonal or other polygonal shapes with reentrant sides, or may even have inwardly curving sides.
- the sole elements defining the apertures may be geometric features such as triangular features, quadrilateral features, trapezoidal features, hexagonal features, octagonal features, oval features and circular features.
- the embodiments shown in the figures are shown as having apertures with approximately polygonal geometries, including approximately point-like vertices at which adjoining sides or edges connect, in other embodiments some or all of an aperture could be non-polygonal. In particular, in some cases, the outer edges or sides of some or all of an aperture may not be joined at vertices, but may be
- the apertures may have three vertices with three inwardly curved sides joining the three vertices.
- some embodiments can include apertures having a geometry that includes both straight edges connected via vertices as well as curved or non-linear edges without any points or vertices.
- FIG. 3 is an exploded perspective view of an example of the
- FIG. 1 This figure shows each of the major components of an article of footwear 100 including an upper 101 and a sole structure 200.
- sole structure 200 has three major components: an insole 210, an auxetic liner 220 and an auxetic outsole 230.
- auxetic liner 220 is positioned above auxetic outsole 230.
- auxetic liner 220 is positioned between auxetic outsole 230 and upper 101 (or Iikewise between auxetic outsole 230 and insole 210).
- auxetic liner 220 is positioned inwardly of auxetic outsole 230, with the inward direction being directed inwardly towards an interior cavity of article of footwear 100,
- FIG. 4 and FIG, 5 show bow an auxetic liner 400 mates with and fits into auxetic outsole 500.
- a section of auxetic liner 400 has downwardly pointing projections 401 that are dimensioned and positioned to fit into apertures 501 in a corresponding section of auxetic outsole 500.
- Projections 401 are shaped to fit closely into apertures 501 .
- auxetic liner 400 is made of a thin, flexible, resilient and stretchable material that can stretch, flex and bend as outsole 500 flexes and bends.
- Projections 401 may be hollow, such that they can readily close or open up as the auxetic liner bends and flexes.
- auxetic liner 400 has an auxetic structure formed of sole elements 402 that are joined at their vertices 403, which match the corresponding sole elements 502 and vertices 503 in auxetic outsole 500.
- Vertices 403 and vertices 503 function as hinges, allowing adjoining sole elements 402 in auxetic liner 400 and sole elements 502 in auxetic outsole 500 to rotate with respect to each other, and thus allow some expansion of the material in a direction that is orthogonal to the direction under tension.
- projections 401 have a substantially three-pointed star cross-sectional shape over their entire height, culminating in an apex 416 (identified in FIG. 6, discussed below).
- FIG. 5 is a schematic diagram showing how a hollow projection 401 of the section of an auxetic liner 400 (shown in FIG. 4) fits into a corresponding aperture 501 in a section of the auxetic outsole 500 (also shown in FIG. 4).
- Auxetic liner 400 may be formed from a sheet of an elastic and resilient material, for example, by molding, embossing or other means.
- FIG. 6 show two views of a single hollow projection 401 .
- the top diagram is a view of the exterior of hollow projection 401
- the bottom diagram is a view of the interior of hollow projection 401 .
- projection 401 has a substantially three-pointed star cross-sectional shape in a substantially horizontal plane over the entire height of projection 401 .
- Projection 401 can also be characterized as having three pyramidal sections (section 413, section 414 and section 415 as shown in FIG. 6) that are joined along edges (e.g., exterior edge 412 between section 413 and section 414), The top peak of all three pyramidal sections forms the apex 416 of projection 401 ,
- each pyramidal section, or arm, of projection 401 is further comprised of two faces.
- pyramidal section 413 is seen to have a first face 421 and a second face 422, which are joined along an upper edge 423.
- FIG. 8 The bottom diagram of FIG. 8 is an interior view of hollow projection 401 , showing its three pyramidal section of arms (section 413, section 414 and section 415) which join at apex 416.
- This diagram shows that section 413 has a first interior surface 441 and a second interior surface 442 which meet at interior edge 443.
- First interior surface 441 and second interior surface 442 are the interior surfaces that correspond to first face 421 and second face 422 described above with respect to the top diagram.
- Interior surface 441 of section 413 joins interior surface 434 of pyramidal section 414 at interior edge 432.
- Interior surface 442 of section 413 joins interior surface 445 of section 415 at interior edge 444.
- auxetic liner 400 may be molded from a sheet of an elastic and resilient material, the angle between any two adjacent pyramidal sections, such as the angle A1 identified in FIG. 6 between pyramidal section 413 and pyramidal section 414, may adjust so that auxetic liner 400 can conform readily to auxetic outsole 500, as auxetic outsole 500 responds to imposed stresses.
- the edges between adjacent sections for example, edge 412) and the edges between adjacent faces in each section (for example, edge 423) may all operate as hinge-like portions such that geometry of projection 401 can change. For example, as tension is applied across projection 401 in a horizontal direction (for example, lateral or longitudinal), adjacent faces comprising projection 401 may move so that projection 401 decreases in height and expands horizontally both laterally and longitudinally.
- FIG, 7 is a side perspective view of a section of auxetic outsole 500 and a section of auxetic liner 400, showing how the projections 401 of auxetic liner 400 fit into apertures 501 in auxetic outsole 500.
- Apex 416 of a pyramidal downwardly- pointing projection 401 has faces such as face 421 and face 422 that slide into apertures 501 of auxetic outsole 500.
- auxetic liner 400 In operation, the projections 401 of auxetic liner 400 fill up most if not all of apertures 501 , such that water, dirt, pebbles or other debris cannot enter and remain in apertures 501 . Because auxetic liner 400 is made from a sheet of a thin, flexible and elastic material and because its auxetic structure matches the auxetic structure of auxetic outsole 500, it can readily stretch and bend to
- auxetic liner 400 both protects auxetic outsole 500 and complements the performance of auxetic outsole 500.
- projections 401 may protrude through apertures 501 .
- the projections could then engage a playing surface such as a grass field, a track or a running trail, and thus provide additional traction for outsole 500.
- projections 401 could be made of or coated with a relatively tough, abrasion-resistant material, such as PEEK (polyether ether ketone) or other abrasion resistant polymer.
- FIG. 8 is a schematic diagram showing an auxetic liner 400 with its projections 401 in an auxetic outsole 500.
- auxetic liner 400 and auxetic outsole 500 are not under stress.
- FIG. 8 also shows a cross-section 520 of auxetic outsole 500, taken as indicated in FIG. 8, with apertures 521 in their unstressed geometry.
- auxetic liner 400 and auxetic outsole 500 show how the geometry of auxetic liner 400 and auxetic outsole 500 changes when the sole structure is under longitudinal tension, as indicated by the arrows 530, Because the sole structure is under longitudinal tension, the pyramidal sections in auxetic liner 400 and the corresponding sections of apertures 501 adjust cooperatively, increasing the dimensions of the apertures and the projections, as shown in FIG, 9, Specifically, as auxetic outsole 500 expands both longitudinally and laterally in response to a longitudinal tension, auxetic liner 400 expands in a similar manner so that the expansion of auxetic liner 400 is compatible with the expansion of auxetic outsole 500, such that auxetic liner 400 may provide full coverage of auxetic outsole 500.
- FIG. 10, FIG.1 1 and FIG. 12 show how different regions of an auxetic outsole 630 respond to the stresses imposed on the auxetic outsole when, for example, a person wearing the article of footwear is running.
- article of footwear 600 is shown as the runner is pressing down on his forefoot and lifting his heel up in the air.
- the portion of the outsole in the heel region 605 of the auxetic outsole is not under either tension or compression
- the forefoot region 603 is under vertical compression
- midfoot region 604 is under longitudinal tension.
- heel region 605 is not under tension or compression
- the apertures 631 and sole elements 632 in the heel region are in their initial relaxed state, which is shown in the blow-up in FIG. 10.
- auxetic structures made of resilient materials may contract under vertical impact, in the embodiment shown in FIGS. 10-12, when forefoot region 603 is under vertical compression, sole elements 632 around apertures 631 move in towards the centers of the apertures, thus closing down apertures 631 to some extent, as shown in the blow-up of FIG. 1 1 .
- This action absorbs some of the impact force and increases the amount of material under the forefoot, thus cushioning the impact of the foot strike against the ground.
- midfoot region 604 is under tension
- sole elements 632 around apertures 631 in the auxetic outsole rotate, thus opening up apertures 631 as discussed above with reference to FIG. 4 and FIG. 5, and as shown in the blow-up of FIG. 12. This action allows the outsole to conform to the configuration of the runner's foot as it bends up at the heel and down at the forefoot.
- FIG. 13 and FIG. 14 are schematic illustrations of the structure of the embodiment shown in FIG, 1 , an embodiment in which the article of footwear has an auxetic liner positioned above its auxetic outsole.
- FIG. 13 is a perspective view of this embodiment with a cutaway view of a lateral cross-section of the article of footwear 600
- FIG. 14 is similar to FIG. 13, but in this case the cutaway view is a view of a longitudinal cross section of article of footwear 600.
- article of footwear 600 has an upper 601 for enclosing the wearer's foot attached to a sole structure 602.
- Sole structure 602 has an insole 610, an auxetic liner 620 and an auxetic outso!e 630.
- Hollow projections 621 extend down from auxetic liner 620 into apertures 631 . As shown in FIG. 13 and FIG. 14, in some embodiments projections 621 have a hollow interior 622. Projections 621 fill up much of the volume of apertures 631 , thus preventing debris or moisture from entering apertures 631 and interfering with the operation of auxetic outsole 630. Moreover, because auxetic liner 620 has an auxetic structure that matches the auxetic structure of auxetic outsole 630, auxetic liner 620 complements the performance of auxetic outsole 630, rather than interfering with the performance of auxetic outsole 630.
- the liner may be a flat liner rather than a liner with an auxetic structure, as in the embodiment of FIGS, 1 -14,
- the article of footwear 700 has an upper 701 attached to a sole structure 702.
- the auxetic layer 730 functions as a midsole.
- Sole structure 702 has a flat outsole liner 740 attached to the bottom of auxetic midsole 730, as well as an insole 710 positioned between the upper 701 and the auxetic midsole 730.
- Outsole liner 740 may be made of a resilient, elastic and flexible material such as an elastomeric polymer that
- auxetic midsole 730 accommodates and conforms to the shape of auxetic midsole 730 as auxetic midsole 730 bends and curves when the wearer of the footwear is running, leaping or cutting while engaging in an athletic or recreational activity.
- flat outsole liner 740 is the immediate ground-contacting surface in this embodiment, it could be made of a tough and abrasion-resistant material.
- Flat outsole liner 740 protects auxetic midsole 730 by preventing debris or moisture from entering into the apertures 731 in auxetic midsole 730.
- the article of footwear 800 may include both an auxetic liner 820 positioned above (i.e., inwardly of) auxetic midsole 830 and a flat outsole liner 840 positioned below (i.e., outwardly of) auxetic midsole 830.
- upper 801 is attached to sole structure 802, which includes an insole 810, an auxetic liner 820, an auxetic midsole 830 and an outsole liner 840.
- auxetic liner 820 has tri-star shaped projections 821 that mate with similarly-shaped apertures 831 in auxetic midsoie 830.
- auxetic liner 820 may be made of a flexible and resilient material such that it may conform to the changing shape of auxetic midsoie 830, as the wearer is engaging in various athletic or recreational activities.
- outsole liner 840 prevents entry of debris into apertures 831 of auxetic midsoie 830.
- the two auxetic components - the auxetic liner and the auxetic midsoie - may have different material characteristics, so that the choice of materials in the combined structure can be used to tailor the characteristics of the article of footwear to match the requirements of a specific athletic or recreational activity.
- the auxetic liner 820 may also have the function of preventing moisture that might diffuse through insole 810 from entering into apertures 831 in auxetic midsoie 830.
- the article of footwear 900 has an upper 901 attached to a sole structure 902.
- Sole structure 902 may have a flat insole liner 920 positioned between an insole 910 and the auxetic midsoie 930 (i.e., inwardly of midsoie 930), as well as a flat outsole liner 940 positioned below (i.e., outwardly of midsoie 930) and attached to auxetic midsoie 930.
- the insole liner may function as a "tie layer" that adheres well to both the insole 910 of the article of footwear and to the auxetic midsoie 930 to promote the integrity of the sole structure 902. It may also function as a barrier preventing moisture that might diffuse through insole 910 from entering the apertures 931 in auxetic midsoie 930.
- Flat outsole liner 940 prevents debris and moisture from entering into the apertures 931 in auxetic midsoie 930.
- Fiat outsole liner may be made of an abrasion-resistant elastomer, since it is the ground-engaging component of the sole structure.
- the article of footwear 1000 has an upper 1001 attached to a sole structure 1002.
- Sole structure 1002 may have an insole 1010, and an auxetic outsole liner 1040 positioned below auxetic midsoie 930.
- the projections 1041 in auxetic outsole liner 1040 are configured to match and mate with apertures 1031 in auxetic midsoie 1030.
- Auxetic outsole liner 1040 may be fabricated from an abrasion-resistant elasiomeric polymer. Such a polymer may be used to protect auxetic midsole 1030 when auxetic midsole 1030 is made from a material that is not as abrasion-resistant,
- the auxetic structures used for the auxetic outsoles or auxetic midsoles shown in these figures can be manufactured by molding a conventional polymer foam (such as EVA, rubber, polyurethane or thermoplastic polyurethane) to have the pattern of joined triangles, other polygons or other geometries with triangular, polygonal or other shape apertures as described herein.
- the structures could also be manufactured by casting a solid polymer sheet and cutting the desired patterns into the sheet.
- the auxetic structures may be produced by molding a polymer to have the desired pattern, or may be produced by cutting the patterns into a polymer sheet.
- auxetic liners, outsole liners and insole liners may be
- the insole liner may also be fabricated from a material that is not necessarily abrasion-resistant, such as
- auxetic structures using geometric patterns formed of hinged triangles that have openings that increase in both length and width when under longitudinal tension and also increase in both width and length when under lateral tension.
- auxetic foam material which is a material with a negative Poisson's ratio, such that the resulting structure expands in the direction orthogonal to an applied tension both because of its structural properties and because the material itself is intrinsically auxetic.
- the present embodiments depict auxetic structures that have a substantial thickness in comparison to some other kinds of auxetic materials.
- an auxetic structure such as an outsole or a midsole comprising an auxetic structure
- an auxetic structure forming part of a sole structure may have a thickness in the range of one to five millimeters, in some embodiments, an auxetic structure can have a thickness greater than five millimeters and less than ten millimeters. In some embodiments, an auxetic structure can have a thickness greater than ten millimeters.
- the thickness of the auxetic structure can be selected in order to achieve desired properties such as cushioning and support,
Abstract
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/643,254 US9554620B2 (en) | 2013-09-18 | 2015-03-10 | Auxetic soles with corresponding inner or outer liners |
PCT/US2015/066883 WO2016144406A1 (fr) | 2015-03-10 | 2015-12-18 | Semelles auxétiques dotées de revêtements internes ou externes correspondants |
Publications (2)
Publication Number | Publication Date |
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EP3267826A1 true EP3267826A1 (fr) | 2018-01-17 |
EP3267826B1 EP3267826B1 (fr) | 2021-05-26 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP15820997.3A Active EP3267826B1 (fr) | 2015-03-10 | 2015-12-18 | Semelles auxétiques dotées de revêtements internes ou externes correspondants |
Country Status (4)
Country | Link |
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EP (1) | EP3267826B1 (fr) |
CN (1) | CN107427103B (fr) |
TW (1) | TWI619441B (fr) |
WO (1) | WO2016144406A1 (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11744322B2 (en) | 2018-05-08 | 2023-09-05 | Puma SE | Sole of a shoe, particularly an athletic shoe |
US11926115B2 (en) | 2018-05-08 | 2024-03-12 | Puma SE | Method for producing a sole of a shoe, in particular of a sports shoe |
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US2580840A (en) * | 1948-10-19 | 1952-01-01 | Rogndal Rikard | Lightweight, flexible, resilient, and nonskid sole for footwear |
CN2473947Y (zh) * | 2001-05-15 | 2002-01-30 | 张聪霖 | 具隐藏式透气结构的鞋底 |
GB0522560D0 (en) * | 2005-11-04 | 2005-12-14 | Auxetic Technologies Ltd | A process for the preparation of auxetic foams |
US8084117B2 (en) * | 2005-11-29 | 2011-12-27 | Haresh Lalvani | Multi-directional and variably expanded sheet material surfaces |
KR20120111841A (ko) * | 2011-04-03 | 2012-10-11 | 김지나 | 수축과 팽창이 용이한 신발 |
GB201109949D0 (en) * | 2011-06-14 | 2011-07-27 | Dow Corning | Pressure material |
CN102302244B (zh) * | 2011-09-07 | 2013-04-24 | 茂泰(福建)鞋材有限公司 | 一种防滑鞋底及采用该鞋底的防滑鞋 |
US9629397B2 (en) * | 2012-08-31 | 2017-04-25 | Under Armour, Inc. | Articles of apparel including auxetic materials |
DE102013208170B4 (de) * | 2013-05-03 | 2019-10-24 | Adidas Ag | Sohle für einen Schuh und Schuh mit einer solchen Sohle |
WO2015011524A1 (fr) * | 2013-07-23 | 2015-01-29 | Anomaly Action Sports S.R.L. | Élément composite pour des dispositifs de protection de parties du corps humain |
US9402439B2 (en) * | 2013-09-18 | 2016-08-02 | Nike, Inc. | Auxetic structures and footwear with soles having auxetic structures |
US10064448B2 (en) * | 2014-08-27 | 2018-09-04 | Nike, Inc. | Auxetic sole with upper cabling |
-
2015
- 2015-12-18 WO PCT/US2015/066883 patent/WO2016144406A1/fr active Application Filing
- 2015-12-18 EP EP15820997.3A patent/EP3267826B1/fr active Active
- 2015-12-18 CN CN201580077277.7A patent/CN107427103B/zh active Active
-
2016
- 2016-01-20 TW TW105101766A patent/TWI619441B/zh active
Non-Patent Citations (2)
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See also references of WO2016144406A1 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11744322B2 (en) | 2018-05-08 | 2023-09-05 | Puma SE | Sole of a shoe, particularly an athletic shoe |
US11926115B2 (en) | 2018-05-08 | 2024-03-12 | Puma SE | Method for producing a sole of a shoe, in particular of a sports shoe |
Also Published As
Publication number | Publication date |
---|---|
TWI619441B (zh) | 2018-04-01 |
TW201637588A (zh) | 2016-11-01 |
WO2016144406A1 (fr) | 2016-09-15 |
CN107427103B (zh) | 2020-09-22 |
CN107427103A (zh) | 2017-12-01 |
EP3267826B1 (fr) | 2021-05-26 |
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EP3250072B1 (fr) | Article chaussant présentant une structure auxétique | |
US9781969B2 (en) | Article of footwear having an integrally formed auxetic structure | |
EP3267826B1 (fr) | Semelles auxétiques dotées de revêtements internes ou externes correspondants |
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