Footwear with collar elevator

Abstract

The article of footwear includes a collar elevator that returns the ankle collar from a lowered state for easy donning to an upright state that secures the wearer's foot during donning. The collar elevator includes a lever arm. The lever arm can be deformable and biased toward the upright state. The lever arm can be articulated by a biasing force that urges the lever arm toward the upright state. The lever arm can also have various cross-sections. The lever arm extends from a base, which can be a sole portion of the article of footwear. The lever arm and base can be monolithic, permanently bonded, removably bonded, or otherwise connected.

Description

[Technical field]

[0001] The present disclosure relates to articles of footwear having a collar elevator. [Background technology]

[0002] Some footwear articles include an ankle collar that is operated when the footwear article is worn. For example, the ankle collar may be pushed toward the sole as the wearer's foot slides into the upper. Some such footwear articles also include a collar elevator operable to move the ankle collar from a pushed or lowered position to an upright position. An example of one type of collar elevator is described in U.S. Patent No. 9,820,527, and other examples of collar elevators are described in U.S. Patent Publication No. 2018 / 0110292 and U.S. Patent Publication No. 2018 / 0289109. [Brief description of the drawings]

[0003] Some subject matter described in this disclosure refers to drawings, the entire contents of which are incorporated herein by reference. [Figure 1] FIG. 1 illustrates a side view of an article of footwear according to one aspect of the disclosure. [Diagram 2] 2 illustrates a top view of the article of footwear of FIG. 1 according to one embodiment of the disclosure. [Figure 3A] 1 illustrates another article of footwear having a collar elevator according to an aspect of the present disclosure. [Figure 3B] 1 illustrates another article of footwear having a collar elevator according to an aspect of the present disclosure. [Figure 3C] 1 illustrates another article of footwear having a collar elevator according to an aspect of the present disclosure. [Figure 4A] 1 illustrates another article of footwear having an alternative collar elevator according to an aspect of the present disclosure. [Figure 4B] 1 illustrates another article of footwear having an alternative collar elevator according to an aspect of the present disclosure. [Figure 4C] 1 illustrates another article of footwear having an alternative collar elevator according to an aspect of the present disclosure. [Diagram 5] 1 illustrates another article of footwear having a base and a monolithic bifurcated collar elevator according to one embodiment of the present disclosure. [Figure 6] 1 illustrates another article of footwear having a bifurcated collar elevator coupled with a base according to one aspect of the present disclosure. [Figure 7] 1 illustrates another article of footwear having a bifurcated collar elevator integrated with a base according to one aspect of the present disclosure. [Figure 8] 1 illustrates another article of footwear having a bifurcated collar elevator according to an aspect of the present disclosure. [Figure 9A] 1 illustrates another article of footwear having a bifurcated collar elevator and heel pull according to one embodiment of the present disclosure. [Figure 9B] 1 illustrates another article of footwear having a bifurcated collar elevator and heel pull according to one aspect of the disclosure. [Figure 10A] 1 illustrates another article of footwear having a bifurcated collar elevator overlapping a heel pull according to one aspect of the present disclosure. [Figure 10B] 1 illustrates another article of footwear having a bifurcated collar elevator overlapping a heel pull according to one aspect of the present disclosure. [Figure 10C] 10C shows a cross-section along section line 10C-10C of FIG. 10B according to one embodiment of the present disclosure. [Figure 11] 1 illustrates another article of footwear having a collar elevator and collar slide according to an aspect of the present disclosure. [Figure 12] 1 illustrates another article of footwear having a collar elevator and a low profile ankle collar according to an aspect of the present disclosure. [Figure 13A] 1 illustrates another article of footwear having a bifurcated collar elevator and collar stay according to one embodiment of the present disclosure. [Figure 13B] 1 illustrates another article of footwear having a bifurcated collar elevator and collar stays according to one aspect of the disclosure. [Figure 14A] 1 illustrates another article of footwear having a bifurcated collar elevator that overlaps with a collar stay according to one aspect of the present disclosure. [Figure 14B]1 illustrates another article of footwear having a bifurcated collar elevator that overlaps with a collar stay according to one aspect of the present disclosure. [Figure 14C] 14C shows a cross-section along section line 14C-14C of FIG. 14B according to one embodiment of the present disclosure. [Figure 15] 1 illustrates another article of footwear having a base and an asymmetric collar elevator monolithic according to an aspect of the present disclosure. [Figure 16] 1 illustrates another article of footwear having an asymmetric collar elevator coupled with a base according to an aspect of the present disclosure. [Figure 17] 1 illustrates another article of footwear having an asymmetric collar elevator integrated with a base according to an aspect of the present disclosure. [Figure 18] 1 illustrates another article of footwear having an asymmetric collar elevator according to an aspect of the present disclosure. [Figure 19A] 1 illustrates another article of footwear having a scalloped collar elevator according to an aspect of the present disclosure. [Figure 19B] 1 illustrates another article of footwear having a scalloped collar elevator according to an aspect of the present disclosure. [Figure 20A] 1 illustrates another article of footwear having a scalloped collar elevator according to an aspect of the present disclosure. [Figure 20B] 1 illustrates another article of footwear having a scalloped collar elevator according to an aspect of the present disclosure. [Figure 21] 1 illustrates another article of footwear having a C-shaped bifurcated collar elevator according to one embodiment of the present disclosure. [Figure 22] 1 illustrates another article of footwear having a biased collar elevator according to an aspect of the disclosure. [Diagram 23] 1 illustrates another article of footwear having a continuous collar elevator and a multi-piece base according to an aspect of the present disclosure. [Figure 24] 1 illustrates another article of footwear having a bifurcated collar elevator and a multi-piece base according to an embodiment of the present disclosure. [Figure 25A] 1 illustrates another article of footwear having an adjustable orientation collar elevator at the base according to one aspect of the disclosure. [Figure 25B]25C shows a perspective view of an article of footwear having an adjustable orientation collar elevator at the base of FIG. 25B according to one embodiment of the present disclosure. [Figure 25C] 25B illustrates another article of footwear having a collar elevator with a larger adjustable orientation at the base compared to FIG. 25A according to one embodiment of the present disclosure. [Figure 26A] 1 illustrates another article of footwear having another adjustable orientation of a collar elevator at the base according to an aspect of the present disclosure. [Figure 26B] 26C shows a perspective view of an article of footwear having an adjustable orientation collar elevator at the base of FIG. 26B according to one embodiment of the present disclosure. [Figure 26C] 26B illustrates another article of footwear having a collar elevator with a larger adjustable orientation at the base compared to FIG. 26A according to one embodiment of the present disclosure. [Figure 27A] 1 illustrates another article of footwear having a linear bias configuration for a collar elevator according to an aspect of the present disclosure. [Figure 27B] 1 illustrates another article of footwear having a linear bias configuration for a collar elevator according to an aspect of the present disclosure. [Figure 27C] 1 illustrates another article of footwear having a linear bias configuration for a collar elevator according to an aspect of the present disclosure. [Figure 28A] 1 illustrates another article of footwear having another linear bias configuration for a collar elevator according to an aspect of the present disclosure. [Figure 28B] 1 illustrates another article of footwear having another linear bias configuration for a collar elevator according to an aspect of the present disclosure. [Figure 28C] 1 illustrates another article of footwear having another linear bias configuration for a collar elevator according to an aspect of the present disclosure. [Figure 29A] 1 illustrates another article of footwear having a variable cross-section collar elevator according to an aspect of the present disclosure. [Figure 29B] 29B shows cross sections along the respective cut lines of FIG. 29A according to one embodiment of the present disclosure. [Figure 29C] 29B shows cross sections along the respective cut lines of FIG. 29A according to one embodiment of the present disclosure. [Figure 30A]1 illustrates another article of footwear having another variable cross-section collar elevator according to an aspect of the present disclosure. [Figure 30B] 30B shows cross sections along respective cut lines in FIG. 30A according to one embodiment of the present disclosure. [Figure 30C] 30B shows cross sections along respective cut lines in FIG. 30A according to one embodiment of the present disclosure. [Figure 31A] 1 illustrates another article of footwear having a variable slit collar elevator according to an aspect of the present disclosure. [Figure 31B] 31B illustrates the variable slit collar elevator of FIG. 31A according to one embodiment of the present disclosure. [Figure 32A] 1 illustrates another article of footwear having another variable cross-section collar elevator according to an aspect of the present disclosure. [Figure 32B] 32B shows cross sections along the respective cut lines of FIG. 32A according to one embodiment of the present disclosure. [Figure 32C] 32B shows cross sections along the respective cut lines of FIG. 32A according to one embodiment of the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0004] The subject matter is described with specificity and detail throughout this specification to meet statutory requirements. The embodiments described throughout this specification are for illustration rather than limitation, and the description itself is not necessarily intended to limit the scope of the claims. Rather, the claimed subject matter may be implemented in other ways to include various elements or combinations of elements that are the same as those described herein and involve other current or future technologies. Upon reading this disclosure, alternative embodiments will become apparent to those skilled in the art to which the described embodiments pertain without departing from the scope of this disclosure. It will be understood that certain features and subcombinations are practical and may be employed without reference to other features and subcombinations. This is contemplated by and falls within the scope of the claims.

[0005] Generally, the subject matter described herein relates to articles of footwear, particularly those having a collar elevator.

[0006] The collar elevator aids in donning and / or doffing the article of footwear, as described in detail below. Any combination of the following elements and concepts in this paragraph and throughout this specification is considered to be made from the present disclosure. This specification and the supporting drawings detail various configurations for the collar elevator arm(s), such as bifurcated collar elevator, asymmetric collar elevator, biased collar elevator, and wavy collar elevator. This specification and the supporting drawings also detail various configurations at the proximal end of the arm that forms the collar elevator (e.g., monolithic, mechanically coupled, bonded, variably oriented, slidably coupled, and integrated). This specification and drawings also provide details of various configurations for the base from which the proximal end of the arm that forms the collar elevator extends, such as U-shaped element, bifurcated plate, integrated with the sole, and layered with the sole. This specification and drawings also provide details regarding the cross-sectional shape of the arm that forms the collar elevator. Additionally, the specification and drawings also provide details regarding the construction of various footwear uppers combined with the collar elevator, such as heel loops and collar stays. These various configurations are presented herein to emphasize that any combination of details is contemplated herein. Although specific combinations of collar elevator arms, joints, bases, cross sections and / or upper elements are discussed and shown for illustrative purposes, any combination may be formed from the selection of details provided herein, unless clearly indicated to the contrary.

[0007] To aid in describing and understanding the embodiments herein, elements of a typical article of footwear 10 that may include a tongue reinforcement are described below with reference to Figures 1 and 2. Figure 1 illustrates the exterior of the article of footwear 10, and Figure 2 illustrates the upper end of the article of footwear. When describing the various drawings referred to in this disclosure, like reference numbers refer to like components throughout all of the figures.

[0008] Footwear article 10 includes at least two major elements, including sole structure 12 and upper 14. When footwear article 10 is worn (as intended on the foot), sole structure 12 is typically positioned near the plantar surface of the foot (i.e., the bottom of the foot). Sole structure 12 may protect the bottom of the foot, as well as attenuate ground reaction forces, absorb energy, provide traction, and control foot movements such as pronation and supination. Upper 14 is coupled to sole structure 12 and forms a foot-receiving cavity 16 therewith. That is, sole structure 12 generally surrounds the bottom of the foot, while upper 14 extends over and at least partially covers the dorsal portion of the foot (i.e., the top or top of the foot) to secure footwear article 10 to the foot. Upper 14 includes a foot insertion opening 18 into which the foot is inserted when the foot is positioned within foot-receiving cavity 16 when footwear article 10 is worn.

[0009] As shown in FIG. 1 , the article of footwear 10 may include a forefoot region 20, a midfoot region 22, a heel region 24, and an ankle region 26. The forefoot region 20, the midfoot region 22, and the heel region 24 extend through the sole structure 12 and the upper 14. The ankle region 26 is located in a portion of the upper 14. The forefoot region 20 generally includes the portion of the article of footwear 10 that corresponds to the toes and joints that connect the metatarsals with the phalanges. The midfoot region 22 generally includes the portion of the article of footwear 10 that corresponds to the arch area and instep of the foot. The heel region 24 corresponds to the rear portion of the foot, including the calcaneus. The ankle region 26 corresponds to the ankle. Forefoot region 20, midfoot region 22, heel region 24, and ankle region 26 are not intended to define exact areas of article of footwear 10, but instead are intended to indicate general areas of article of footwear 10 to aid in understanding various aspects herein. Portions of the article of footwear may also be described in relative terms using these general areas. For example, a first structure may be described as being further toward the heel than a second structure, which is in the toe direction and closer to the forefoot.

[0010] The article of footwear 10 also has a medial side 28 (as seen in FIG. 2 and hidden in FIG. 1) and a lateral side 30 (as seen in FIG. 2 and visible in FIG. 1). The medial side 28 and the lateral side 30 extend through each of the forefoot region 20, the midfoot region 22, the heel region 24, and the ankle region 26, and correspond to opposite sides of the article of footwear 10, and each is located on opposite sides of a longitudinal midline reference plane 29 of the article of footwear 10, as would be understood by one of ordinary skill in the art. For example, the longitudinal midline reference plane 29 may pass through a forward-most point of the sole structure and a rearward-most point of the sole structure. Thus, the medial side 29 is considered to be opposite the lateral side 30. Typically, the medial side corresponds to the medial area of ​​the foot (i.e., the surface facing the other foot) and the lateral side corresponds to the lateral area of ​​the foot (i.e., the surface facing away from the other foot). In another embodiment, the article of footwear includes a front portion 33 and a rear portion 35 located on opposite sides of a latitudinal midline reference plane 31 of the article of footwear 10. The latitudinal midline reference plane 31 extends perpendicular to the longitudinal midline reference plane 29 and the ground plane and is equally spaced between a forward-most point of the article of footwear 10 and a rear-most point of the article of footwear 10. These terms may also be used to describe the relative locations of various structures. For example, a first structure closer to a medial portion of the article of footwear may be described as being medial to a second structure (which is closer to the lateral region and more lateral).

[0011] When describing an article of footwear, the relative terms "lower" and "upper" may also be used. For example, an upper portion generally corresponds to an upper end portion that is oriented closer to the direction of a person's head when the person's foot is lying flat on a horizontal ground surface and the person is standing upright, while a lower portion generally corresponds to a lower end portion that is oriented away from the person's head and closer to the ground surface.

[0012] The sole structure 12 may be constructed of a variety of materials and may include a variety of elements. For example, the sole structure 12 may include a midsole 32 and an outsole 34. The midsole 32 may be formed from a compressible polymer foam element (e.g., polyurethane or ethylene vinyl acetate (EVA) foam) that attenuates ground reaction forces (i.e., provides cushioning) when compressed between the foot and the ground during walking, running, or other ambulatory activities. In further embodiments, the midsole 32 may incorporate fluid-filled chambers, plates, adjusters, or other elements that further attenuate forces, improve stability, or affect foot motion. The midsole 32 may be a single, one-piece midsole or may be multiple components integrated as one unit. In some embodiments, the midsole 32 may be integrated with the outsole 34 as a unisole. The outsole 34 may be one piece or may be a component of several outsoles, may be formed from a wear-resistant rubber material that may be textured to provide traction, and / or may include traction elements such as treads or cleats secured to the midsole 32. The outsole 34 may extend the entire length and width of the sole or may extend only partially across the length and / or width.

[0013] The upper 14 may also be constructed of a variety of materials and include a variety of features. For example, the upper 14 may be constructed of leather, fabric, or other synthetic or natural materials. The upper 14 may also be a knit, woven, braided, nonwoven, laminate, or any combination thereof. The upper 14 may have a variety of material properties related to breathability, elongation, flexibility, wicking, water resistance, etc.

[0014] The upper 14 typically includes a portion that overlaps and is connected to the sole structure 12, and the juncture of such connection may be referred to as a biteline. The upper 14 may also include a "strobel" that includes a panel of material that extends from the upper 14 across at least a portion of the foot-facing surface of the sole structure 12, and the strobel may be used to hold the upper 14 to the last when the sole structure 12 is attached to the upper 14. In other words, the sole structure 12 integrated into the article of footwear 10 includes a foot-facing surface, and in some cases, the upper 14 may include a panel (called a strobel) that extends inwardly from near the biteline area to at least partially cover the foot-facing surface. In this case, the strobel is positioned under the foot when the article of footwear is worn. The strobel may be covered with an insole or other layer of material.

[0015] The upper 14 includes other features. For example, the upper 14 includes an ankle collar 36 that forms a perimeter around at least a portion of the foot insertion opening 18. The upper 14 also often includes a throat 38 that extends from the ankle collar 36 and forms a perimeter along at least one or more sides of an elongated opening 40. A tongue 42 is located in the elongated opening 40, the size of which can be adjusted using various closure systems. For example, FIG. 1 illustrates laces 44, other closure systems can include elastic bands, hook-and-loop straps, zippers, buckles, and the like. The location of the tongue 42 and the connections of the closure system can be adjusted to change the size of the foot insertion opening and the elongated opening, for example, by making the opening larger when the footwear article is put on or taken off and making the opening smaller when the footwear article is secured to the foot. Further embodiments contemplate that the elongated aperture 40 (which may also be referred to as a forefoot aperture) may be omitted, and instead the medial and lateral sides of the upper converge and are continuous across the area that would traditionally include the elongated aperture 40. Thus, in some embodiments, the tongue 42 is, for example, integral to the upper and / or continuous with and / or adjacent to the upper.

[0016] Footwear article 10 may include, for example, an athletic shoe that can be worn when running or walking, and the description of footwear article 10, including the elements described with respect to Figures 1 and 2, may also apply to other types of shoes, such as basketball shoes, tennis shoes, American football shoes, soccer shoes, leisure or casual shoes, dress shoes, work shoes, sandals, slippers, boots, hiking shoes, etc.

[0017] Having described Figures 1 and 2, several other aspects of the disclosure are described below with reference to Figures 3A-3C and 4A-4C. Each of Figures 3A, 3B, and 3C shows an article of footwear 310 including an upper 314 coupled to a sole 312, the upper 314 including an ankle region 326 with an ankle collar 336. The ankle collar 336 is movable between a lowered state (shown in Figure 3C) and an upright state (shown in Figures 3A and 3B). In the lowered state, the ankle collar 336 is positioned closer to the sole 312, and in the upright state, the ankle collar 336 is positioned further from the sole 312.

[0018] The article of footwear 310 also includes a collar elevator 350 that is coupled to the upper 314 near the heel region 324 and / or the ankle region 326 and is operable to move the ankle collar 336 from a lowered state to an upright state. More specifically, the collar elevator 350 includes a portion that is positioned in the heel region 324 and extends to the ankle region 326. As previously mentioned, there is not necessarily a precise delineation between the heel region 324 and the ankle region 326, and instead, describing the positioning of the collar elevator 350 relative to these regions is one way of describing the collar elevator 350 extending from a lower portion (closer to the sole) to a higher portion (closer to the ankle collar 336). As long as the collar elevator 350 is coupled to the upper 314 (near the heel region 324 and / or the ankle region 326), the form of such coupling may vary. For example, collar elevator 350 may be coupled to the upper at heel region 324, coupled at ankle region 326, coupled to ankle collar 336, or any and all combinations thereof. Collar elevator 350 is an example of one type of collar elevator operable to move an ankle collar from a lowered state to an upright state, and as described elsewhere in this disclosure, the collar elevator may include one or more alternative structures beyond those shown in FIGS. 3A-3C. For example, FIGS. 4A-4C illustrate an article of footwear 410 with a collar elevator 450 operable to move ankle collar 436 from a lowered state (e.g., FIG. 4C) to an upright state (e.g., FIGS. 4A and 4B) that is structured differently than collar elevator 350. Additionally, FIGS. 5-8 illustrate an example of a bifurcated collar elevator, and FIGS. 15-18 illustrate an example of an asymmetric collar elevator. Further figures and disclosure herein provide further alternative collar elevator configurations, as discussed below.

[0019] For illustrative purposes, upper 314 and upper 414 are shown with phantom dashed lines, and the collar elevator may be located at various points relative to the upper. For example, the collar elevator may be at least partially, and possibly completely, affixed between the exterior layer and the inner lining in the heel region, the ankle region, the ankle collar, or any and all combinations thereof. In another embodiment, the collar elevator may be at least partially exposed and located on the exterior or outer surface of the upper. In a further embodiment, at least a portion of the collar elevator may be located on the interior foot-facing surface of the inner lining. In another embodiment, the collar elevator may be located on the exterior of the article of footwear and attached to the heel portion of the ankle collar by tabs, heat staking, bonding, stitching, or other bonding.

[0020] A collar elevator (e.g., collar elevators 350 and 450) may include a variety of elements. In one embodiment, the collar elevator includes an inner lever arm, an outer lever arm, and (optionally) a central connecting band that connects the inner lever arm to the outer lever arm and is located at the heel portion of the ankle collar. For purposes of this specification, the terms inner lever arm and outer lever arm may be substituted with the terms first lever arm and second lever arm when no relative position relative to the upper is intended. In further embodiments, each lever arm is affixed to a base, which is maintained stationary relative to the lever arm by the lever arm deforming and / or articulating when the ankle collar moves to a lowered state. The base may be a part of the article of footwear, such as a part of the sole or a part of the upper. The base may also be one or more other anchors affixed directly or indirectly to the sole, the sole itself, or any combination thereof. US Patent No. 9,820,527 describes one or more collar elevators, some of which may be referred to as deformable member(s) (with or without a base), the entire disclosure of which is incorporated herein by reference. According to one aspect of the present disclosure, at least some of the deformable members described in US Patent No. 9,820,527 include an inner lever arm, an outer lever arm, and a central connecting band that connects the inner lever arm to the outer lever arm. In another example, US Patent No. 2018 / 0110292 and US Patent No. 2018 / 0289109 each describe multiple other collar elevators, some of which may be referred to as control bars (with or without a base), the entire disclosures of which are incorporated herein by reference. According to one aspect of the present disclosure, at least some of the control bars described in US 2018 / 0110292 and US 2018 / 0289109 include an inner lever arm, an outer lever arm, and a central connecting band connecting the inner lever arm to the outer lever arm.

[0021] Each of the illustrated collar elevators 350 and 450 shows an example of an inner lever arm 352 and 452, respectively. Also, each of the illustrated collar elevators 350 and 450 shows an example of an outer lever arm 354 and 454, respectively, and an example of a central connecting band 356 and 456, respectively. Also, the lever arms 352 and 354 are attached to a base 358, and the lever arms 452 and 454 are attached to a base 458 of a different structure than the base 358. The base 358 is affixed to or near the foot-facing surface of the sole 312, and the base 358 may be a portion of an outsole, a portion of a midsole, a portion of an insole, a portion of a strobel, a plate or sheet of material laminated between any of these sole layers, or any combination thereof. In particular, the base 358 may include a rigid portion or section to which the lever arms 352 and 354 are secured. 4A-4C show a different embodiment, where base 458 may be attached to a portion of the upper (e.g., heel counter), a portion of the midsole sidewall, or any combination thereof, where base 458 wraps around the underside of the article of footwear as opposed to extending through the insole in the manner described for base 358. FIGS. 4A-4C show similar features of the upper as described in FIGS. 3A-3C, such as ankle collar 436, ankle region 426, heel region 424, etc., where a portion 425 of the upper below the central connector band may include one or more fabrics that are more flexible than other portions of the upper.

[0022] The inner lever arm, the outer lever arm, and the central connecting band may be a single continuous piece, and thus there may be no clear boundary between the inner lever arm, the outer lever arm, and the central connecting band (i.e., a monolithic structure). For example, the inner and outer arms and the central connecting band may be molded, cast, 3D printed, or otherwise formed as a single integrally formed unit, such as a monolithic structure. In other embodiments, the inner and outer lever arms may be separate, distinct, and individual elongated members that are connected to the central connecting band by mechanical or chemical bonding, friction fit, coating, or other bonding.

[0023] Having generally described some structural elements of the collar elevator, the following describes some operational aspects of the collar elevator. As briefly described above, the collar elevator moves the ankle collar from a lowered state to an upright state. More specifically, at least a portion of the collar elevator is affixed to a portion of the upper. In one embodiment, the central connection band can be affixed near the heel portion of the ankle collar. For example, the central connection band can be attached to the heel portion of the ankle collar by adhesive, connection tabs, heat staking, stitching, or the like. Thus, as the ankle collar moves closer to the sole to the lowered state, the first lever arm can be deformed to a more compressed or loaded position. In other words, the collar elevator stores potential energy by elastically deforming from a less compressed configuration (e.g., FIGS. 3A and 4A ) to a more compressed configuration (e.g., FIGS. 3C and 4C ) when an applied force moves the ankle collar from an upright state to a lowered state. The potential energy returns the collar elevator to a less compressed configuration upon removal of the applied force, and the ankle collar also moves from the lowered state to the upright state because the collar elevator is affixed to or otherwise physically associated with the upper. The collar elevator may be more compressed as the ankle collar moves to the lowered state (relative to the upright state), but in the upright state the collar elevator may still store potential energy in an at least partially deformed state (i.e., pre-compressed) to allow retention of the rear, i.e., heel portion, of the ankle collar around the heel of the wearer. For example, if the collar elevator is attached to the upper heel region and / or upper ankle region, a portion of the upper may hold or maintain the collar elevator in a pre-compressed configuration when the ankle collar is in the upright state. In other embodiments, the collar elevator may be unloaded when the ankle collar is in the upright state.

[0024] In one embodiment, the portion 325 of the upper below the central connecting band may include one or more fabric walls that are more flexible than other portions of the upper. The more flexible region of the upper may be, for example, at least partially in the heel counter region. In particular, such a more flexible portion 325 of the upper may collapse more easily as the ankle collar moves to a lowered state and may provide less resistance to the collar elevator as it returns to a less compressed state (compared to less flexible uppers in other portions of the article of footwear or in conventional articles of footwear).

[0025] In some embodiments, the combination of the inner lever arm, the outer lever arm, and the central connecting band may be referred to as a deformable element. The term "deformable element" refers to a resiliently flexible member that can be deflected or compressed, but has a bias to move toward a non-deflected or non-compressed state. The deformable element may include a single integrally formed deformable element that extends continuously from the inner lever arm to the outer lever arm. In other embodiments, the inner lever arm and the outer lever arm may be two or more separate individual deformable elements that are connected to the central connecting band, which may also be referred to as a heel piece. As shown herein, the deformable element may be a first lever arm, a second lever arm, an asymmetric collar elevator, a wavy collar elevator, a C-shaped spring, and / or any other element effective to provide a return force to the upper from a first position state for wearing to a second position state for securing the wearer's foot.

[0026] In some embodiments, the deformable element may be directly coupled, attached, or attached to the base. In other embodiments, the base may include one or more anchors that engage and maintain the deformable element in place. For example, the anchors may be located at the junctions (e.g., 359 and 459) between the lever arms and the base. Such anchors may be integrally formed with and / or coupled to and / or located within, between, or outside portions of the sole (e.g., insole, midsole, outsole). For example, the anchors may be located on blocks, plates, or wedges that are stacked between, on top of, or under the sole. In some cases, a portion of the sole (e.g., midsole) may be sculpted or cut to attach to or accommodate the anchors. In another embodiment, the base (e.g., base 358) extending in a medial-lateral orientation includes an anchor-like receiver with which the anchor engages by a resistance fit, compression fit, snap fit, or via an interlocking mechanism / configuration. In other examples, the anchors may be integrally formed with and / or coupled to and / or located within, between or outside portions of the upper. For example, the anchors may be located on the upper, the heel counter, or a combination thereof. A single anchor may extend the entire width of the article of footwear, or two anchors may be positioned on both sides of the article of footwear (e.g., on the medial and lateral sides). The deformable member may be attached at an angle to the base or anchor. For example, the deformable member may be attached at a perpendicular angle to the base and then curve or arc backward. In another embodiment, the deformable member may be attached at an angle that is angled forward (i.e., upward and forward) or backward (i.e., upward and backward) before arcing backward.

[0027] The connection between the deformable member and the base or anchor may be described in various ways. For example, in one embodiment, the deformable element does not pivot (i.e., is non-pivotal) about the base (e.g., about the insole, midsole, or outsole). In other words, the deformable element may be non-rotatably coupled to the base. In various embodiments, the engagement between the deformable element and the base (or anchor) is without play, meaning that there is little or no relative movement between the two components. In yet other embodiments, the deformable element may be adjustably oriented with the base (or anchor), as shown in Figures 25A-26B and discussed below. Additionally, the deformable element may be slidably engaged with the base (e.g., sole), as shown and discussed in connection with Figures 27A-28C.

[0028] The deformable element may include one or more of a tube, a wire, a spring, a shape memory structure or material, and the like. The deformable element may also include one or more materials, such as carbon steel, stainless steel, titanium, nickel titanium (nitinol), and other metals and alloys (shape memory or otherwise), polymers (shape memory or otherwise), composites, foams, graphite, carbon fiber, fiberglass, thermoplastic polyester elastomers ("TPC-ET"), silicone, thermoplastic polyurethanes ("TPU"), and polycarbonates. For example, the deformable element may include titanium or may be a titanium wire. It is noted that one or more of the deformable elements may be made of a first material, such as titanium, and one or more additional deformable elements may be made of a second material, such as graphite. Various combinations of materials may also be used to form the deformable elements. For example, a first material may form a first portion of the deformable element, and a second (different) material may form a second portion of the same deformable element.

[0029] In some embodiments, the deformable element may comprise a single, monolithic piece. For example, a first end of the deformable element (e.g., the end of a first lever arm) may be built into or attached to a medial anchor, a second end of the deformable element (e.g., the end of a second lever arm) may be built into or attached to a lateral anchor, and an intermediate portion of the deformable element (e.g., a central connecting band) may extend around a heel or ankle portion of the upper or may be built into some additional heel piece structure.

[0030] In other embodiments, the deformable element may include multiple separate individual components, such as a bifurcated configuration. For example, the deformable element may include two separate components, with a first component (e.g., a first lever arm) having a first end (i.e., a proximal end) built into or attached to the medial anchor and a second end (distal end) built into, attached to, or otherwise positioned relative to the upper. Thus, the second component (e.g., a second lever arm) may similarly include a first end built into or attached to the lateral anchor and a second end built into, attached to, or otherwise positioned relative to the upper. The multiple separate individual components may be formed of one or more of tape wrap, woven encasing, overmolding (e.g., TPU), heat shrink tubing, and the like, each of which may provide different stability and strength. For example, the deformable element may include one or more wires that are housed separately or together in a cover, sleeve, overmold, or heat shrink tubing, and that may arch, bend, oscillate, and then return to an initial / normal state to facilitate elastic deformation of the deformable element.

[0031] In yet other embodiments, the deformable element may be coupled to, extend from, or otherwise secured to the base at only one location, e.g., an asymmetric configuration. In an asymmetric configuration, the deformable element may include a single component having a first end (i.e., a proximal end) that is built into or attached to a medial, lateral, or midline anchor (e.g., at the Achilles location of the heel end) and a second end (i.e., a distal end) that is built into, attached to, or otherwise positioned relative to the upper. As discussed below in connection with Figures 15-18, an asymmetric deformable member is secured to the base on a first side (e.g., medial) of the base at the proximal end of the deformable member and extends from the proximal end toward a distal end that is not secured to the base. Because the deformable member extends around the heel end of the upper from the opposite side of the upper relative to the proximal end (e.g., the lateral side of the upper) to the distal end.

[0032] The deformable element may have variable mechanical properties along its length and / or at distinct points along its length. Such variation may be provided by the deformable element (e.g., a wire or a bundle of two or more wires), a fixation device surrounding all or part of the deformable element(s), cross-sectional shape / size / orientation, or any combination thereof. For example, the deformable element and / or fixation device may have variable cross-sections, variable densities, variable materials, etc. along its length, as shown, for example, in Figures 29A-32B. Thus, a variable cross-section may be provided by a change in thickness or shape, or, if the thickness or shape of the deformable element is otherwise constant, by twisting the deformable element along its length.

[0033] As briefly mentioned above, the deformable element may include a cover, sleeve, overmold, or other suitable structure that may protect other elements of the deformable element (e.g., wires, springs, etc.) and control and / or guide and / or support and / or otherwise affect the bending or compression of the deformable element. In some embodiments, the cover is configured, based on its manufacturing material, shape, geometry, etc., to promote the distribution of mechanical stress by transferring mechanical bending / deformation forces from the deformable element (e.g., from the wire(s) or springs) to the cover, preventing or at least inhibiting damage or breakage of the deformable element that may otherwise occur due to the concentrated and repeated mechanical stresses to which the deformable element is subjected. For example, the cover may have dimensions that vary along its length (e.g., a funnel-like taper) to promote the distribution of stresses and contribute to the dynamic bending of the deformable element. In the event that the deformable element breaks, the cover may still provide at least some bias to help move the ankle collar from a lowered position to an upright position. The cover may also provide additional padding and / or support to the deformable element and may prevent, or at least inhibit, the wearer from feeling the deformable element.

[0034] As briefly mentioned above, the central connection band may also be referred to as a heel piece when included in a collar elevator configuration. The central connection band may be integrally formed with the medial and lateral lever arms as a single continuous unit. In other aspects, the central connection band may be a separate piece that extends between and bridges the medial and lateral lever arms. In particular, the central connection band may provide a bond to the upper and may provide a frame for the ankle collar to prevent it from folding into the foot-receiving opening when the foot is inserted. The central connection band may be omitted entirely in some aspects contemplated herein (e.g., bifurcated collar elevators).

[0035] When worn by a wearer, a footwear article having a collar elevator (e.g., collar elevators 350 and 450) is a footwear article that the wearer may wear without the wearer using their hands to manipulate the footwear article. For example, the wearer's toes may be inserted through foot insertion opening 318 or 418, while the arch or heel of their foot is used to press ankle collar 336 or 436 downward toward sole 312 or 412. In this manner, the size of foot insertion opening 318 or 418 may be increased by adjusting ankle collar 336 or 436 closer to the sole in a lowered state. As the wearer's foot slides into foot receiving cavity 316 or 416, collar elevator 350 or 450 helps to move ankle collar from a lowered state (i.e., FIGS. 3C and 4C) to an upright state (i.e., FIGS. 3A and 4A) to secure the footwear article to the wearer's foot.

[0036] In particular, the collar elevators 350 and 450 may reduce the likelihood of structural failure of the upper heel and upper ankle regions over time, which may be due to repeated hands-free donning by providing a frame that operates to return to an upright or biased state. The collar elevators 350 and 450 may also allow a user to easily don (i.e., put on) their shoes without using their hands and / or bending down to tie laces, without using a shoehorn, or without using other such adjustments, elements, or mechanisms for fit. Additionally, the footwear articles 310 and 410 may easily receive or guide the wearer's foot within or otherwise accommodate the wearer's foot relative to the foot-receiving opening. Such ease of donning may be due in particular to the collar elevators 350 and 450, which help provide a large foot insertion opening while preventing the top line of the ankle collar from folding inward toward the foot-receiving cavity.

[0037] The operation of the articles of footwear 310 and 410 may be described in various manners. For example, the ankle collar 336 and 436 may be elastic or may include a goring element that allows for expansion of the foot insertion openings 318 and 418, for example, when the ankle collar moves to the down state. In the down state, the foot insertion openings 318 and 418 may expand at least about 5%, or at least about 10%, or at least about 15%. Such measured expansion may be detected in various manners. For example, a first circumference of the foot insertion opening may be measured when the ankle collar is in a first state, and a second circumference may be measured when the ankle collar is in a second state closer to the sole (relative to the first state). The distance from the sole to the ankle collar in the first and second states may be measured in a vertical plane (i.e., perpendicular to a horizontal reference plane, including a flat ground surface on which the ground contact surface sits in an at-rest position), and the distance may be measured from the rearmost point of the ankle collar's top line edge to the sole's top line edge (e.g., where the sole connects to the upper at the bite line). Thus, the distance in the first state is greater than the distance in the second state, and in one embodiment, the second distance is 75% or less of the first distance. Continuing with the previous example, in the second state having a distance of 75% or less of the distance in the first state, the circumference may expand by at least about 5%, at least about 10%, or at least about 15%. In a further example, the circumference of the foot insertion openings 318 and 418 may expand by at least about 1.0 inch (about 2.54 centimeters) when the ankle collar is in the second state having a distance of 75% or less of the distance in the first state. The amount of expansion of the foot insertion openings 318 and 418 may vary depending on the style and size of the shoe. In other embodiments, the height of the ankle collars 336 and 436 above the soles 312 and 412 in the lowered position is approximately 50% lower than the height in the upright position, although this, as well as other parameters, may vary depending on the style and size of the shoe.

[0038] As described elsewhere in this disclosure, the collar elevators 350 and 450 provide a restoring force when moving the ankle collars 336 and 436 from a lowered state to an upright state. In some embodiments, the restoring force is between about 1 lb-force and about 15 lb-force, which may be measured at various locations on the ankle collar. For example, as previously described, the ankle collar may include a first state having a first distance from the sole and a second state having a second distance from the sole (less than the distance in the first state). In one embodiment, the collar elevators 350 and 450 provide a restoring force between about 1 lb-force and about 15 lb-force in the second state having a distance of about 85% or less of the distance in the first state. In further embodiments, the collar elevators 350 and 450 provide a restoring force between about 1 lb-force and about 15 lb-force in the second state having a distance of about 75% or less of the distance in the first state. Additionally, the collar elevators 350 and 450 may provide a return force of about 1 lbf to about 15 lbf in a second state having a distance of about 50% or less than the distance in the first state. The return force may be strong enough to cause the rear of the ankle collar to spring back from the second state and fit snugly around the heel of the wearer. For example, the ankle collars 336 and 436 may rise from the lowered state to the upright state in less than about 1 second if the distance between the ankle collar and the sole in the lowered state is less than 85%, or less than 75%, or less than 50% of the distance in the upright state. In other embodiments, the ankle collars 336 and 436 may rise from the lowered state to the upright state in less than about 0.5 seconds if the distance between the ankle collar and the sole in the lowered state is less than 85%, or less than 75%, or less than 50% of the distance in the upright state. And, in further embodiments, the ankle collar 336 and 436 may rise from the lowered state to the upright state in less than about 0.2 seconds when the distance between the ankle collar and the sole in the lowered state is less than 85%, or less than 75%, or less than 50% of the distance in the upright state. The bounce back time is measured without any counterbalance from external forces (e.g., friction that may be exerted by the heel of the wearer).

[0039] The collar elevator example of Figures 3A-4C is generally referred to as a continuous collar elevator. As provided in connection with Figures 3A-4C, it is contemplated that a continuous collar elevator may be formed from separate parts joined as a common element. For example, a separate inner lever arm and a separate outer lever arm are described as being joined by a connecting band. In this example, three separate elements are provided that are joined as a common element or otherwise physically combined to represent a continuous collar elevator. This is in contrast to a bifurcated collar elevator or an asymmetric collar elevator provided below. A bifurcated collar elevator has a first lever arm and a second lever arm, where the first lever arm and the second lever arm are not adjacent to each other. In other words, the connecting band of Figures 3A-4C is omitted, and thus the distal end of the first lever arm and the distal end of the second lever arm are independently movable from each other, as will be discussed in more detail below. Additionally, an asymmetric collar elevator lacks symmetry between a first side (e.g., medial) of the article of footwear and a second side (e.g., lateral) of the article of footwear. For example, an asymmetric collar elevator may extend from a base on the first side of the article of footwear to a distal end that is free from the base and on the second side of the article of footwear, as discussed in more detail below. The functions, responses, structures, assemblies, and configurations for each of the continuous collar elevators, bifurcated collar elevators, and asymmetric collar elevators are varied and offer alternative advantages.

[0040] Turning to FIG. 5, an article of footwear 510 having a collar elevator 550 is shown according to an embodiment of the present disclosure. Specifically, the collar elevator is an example of a bifurcated collar elevator comprised of a first lever arm 552 having a proximal end 502 and a distal end 504, and a second lever arm 554 having a proximal end 506 and a distal end 508. The bifurcated collar elevator is distinguished from collar elevator 350 of FIG. 3A because the distal end 504 of the first lever arm and the distal end 508 of the second lever arm are not adjacent. Non-adjacent lever arms are lever arms that are gapped, spaced, disconnected, interrupted, not adjacent in space, not in contact or adjacent, disconnected, separated, or otherwise prevented from continuous physical connection therebetween. For example, central connecting band 356 of FIG. 3A provides a bridge between the first and second lever arms. The omission of center connecting band 356 in FIG. 3A is an example of a bifurcated collar elevator.

[0041] The bifurcated collar elevator provides advantages to footwear assembly in some examples. Instead of forming a footwear upper around a continuous collar elevator or threading a continuous collar elevator through a channel in the footwear upper from a first side to a second side of the footwear during assembly, in one example, the bifurcated collar elevator may be more easily incorporated with a non-adjacent feature around the curve of the heel end. Further advantages of the bifurcated collar elevator may include a reduction in material and associated mass in the non-adjacent portions in examples where the bifurcations include removal of collar elevator material. Yet other potential advantages of the bifurcated collar elevator compared to the continuous collar elevator include variable response, such that in some examples, the first lever arm can respond independently of the second lever arm. Thus, the bifurcated collar elevator provides various advantages from a continuous collar elevator in some examples, such as the one illustrated in FIG. 3A.

[0042] The lever arm of the bifurcated collar elevator, in one example, may extend around the heel end of the article of footwear. The lever arm of the bifurcated collar elevator, in another example, may terminate (e.g., at a distal end) before wrapping a portion of the heel end. It is further contemplated that the first lever arm may have a different length than the second lever arm, resulting in an asymmetric configuration in which there is at least one connection to the base by each of the lever arms. It is further contemplated that the first lever arm may extend from a first location on the base at a first location along the longitudinal length of the article of footwear, and the second lever arm extends from the base at a second location along the longitudinal length of the article of footwear that is different from the first location.

[0043] The article of footwear 510 includes an upper 514 coupled to a sole 512, the upper 514 including an ankle region 526 with an ankle collar 536. The ankle collar 536 is movable between a lowered state and an upright state. In the lowered state, the ankle collar 536 is positioned closer to the sole 512 and in the upright state, the ankle collar 536 is positioned farther from the sole 512.

[0044] The article of footwear 510 also includes a collar elevator 550 coupled to the upper 514 near the heel region 524 and / or the ankle region 526 and operable to move the ankle collar 536 from a lowered state to an upright state. The form of such coupling can vary, so long as the collar elevator 550 is coupled to the upper 514 (near the heel region 524 and / or the ankle region 526). For example, the collar elevator 550 can be coupled generally to the upper 514, the heel region 524, the ankle region 526, coupled to the ankle collar 336, or any and all combinations thereof.

[0045] For illustrative purposes, the upper 514 is shown with phantom dashed lines, and the collar elevator may be located at various points relative to the upper. For example, the collar elevator may be at least partially, and possibly completely, affixed between the exterior layer and the medial lining in the heel region, the ankle region, the ankle collar, or any and all combinations thereof. In another embodiment, the collar elevator may be at least partially exposed and located on the exterior or outer surface of the upper. In a further embodiment, at least a portion of the collar elevator may be located on the interior, foot-facing surface of the medial lining. In another embodiment, the collar elevator may be located on the exterior of the article of footwear and attached to the heel portion of the ankle collar by tabs, heat staking, bonding, stitching, or other bonding.

[0046] The first lever arm 552 and the second lever arm 554 are monolithic to the base 558. A monolithic construction refers to one that is formed or constructed of a material that has no joints or seams. Thus, at the junction 559 between the second lever arm 554 and the base 558, there is no joint, seam, or other connection at the junction 559, or at any other junction between the collar lift and the base. Instead, the material that forms the base 558 extends continuously to the second lever arm 554. For example, the lever arms and the base may, in one example, be formed as a common part in a common operation, such as by a molding operation.

[0047] Base 558 is affixed to or near the foot-facing surface of sole 512, and may be part of an outsole, part of a midsole, part of an insole, part of a strobel, a plate or sheet of material laminated between any of these sole layers, or any combination thereof. In particular, base 558 may include a rigid portion or section to which lever arms 552 and 554 are secured.

[0048] 6 illustrates an alternative article of footwear 610 having a collar elevator 650 according to embodiments herein. Specifically, the collar elevator is an example of a bifurcated collar elevator comprised of a first lever arm 652 having a proximal end 602 and a distal end 604, and a second lever arm 654 having a proximal end 606 and a distal end 608.

[0049] The lever arm of the bifurcated collar elevator, in one example, may extend around the heel end of the article of footwear. The lever arm of the bifurcated collar elevator, in another example, may terminate (e.g., at a distal end) before wrapping a portion of the heel end. It is further contemplated that the first lever arm may have a different length than the second lever arm, resulting in an asymmetric configuration in which there is at least one connection to the base by each of the lever arms. It is further contemplated that the first lever arm may extend from a first location on the base at a first location along the longitudinal length of the article of footwear, and the second lever arm extends from the base at a second location along the longitudinal length of the article of footwear that is different from the first location.

[0050] The article of footwear 610 includes an upper 614 coupled to a sole 612, the upper 614 including an ankle region 626 with an ankle collar 636. The ankle collar 636 is movable between a lowered state and an upright state. In the lowered state, the ankle collar 636 is positioned closer to the sole 612 and in the upright state, the ankle collar 636 is positioned farther from the sole 612.

[0051] The article of footwear 610 also includes a collar elevator 650 coupled to the upper 614 near the heel region 624 and / or the ankle region 626 and operable to move the ankle collar 636 from a lowered state to an upright state. The form of such coupling can vary, so long as the collar elevator 650 is coupled to the upper 614 (near the heel region 624 and / or the ankle region 626). For example, the collar elevator 650 can be coupled generally to the upper 614, the heel region 624, the ankle region 626, coupled to the ankle collar 336, or any and all combinations thereof.

[0052] For illustrative purposes, the upper 614 is shown with phantom dashed lines, and the collar elevator may be located at various points relative to the upper. For example, the collar elevator may be at least partially, and possibly completely, affixed between the exterior layer and the medial lining in the heel region, the ankle region, the ankle collar, or any and all combinations thereof. In another embodiment, the collar elevator may be at least partially exposed and located on the exterior or outer surface of the upper. In a further embodiment, at least a portion of the collar elevator may be located on the interior, foot-facing surface of the medial lining. In another embodiment, the collar elevator may be located on the exterior of the article of footwear and attached to the heel portion of the ankle collar by tabs, heat staking, bonding, stitching, or other bonding.

[0053] The first lever arm 652 and the second lever arm 654 are separate from and coupled to the base 658. The coupling arrangement may be reversibly coupled or permanently coupled. A permanent joint may occur by adhesive bonding, welding, or other methods that result in an irreversible chemical or physical connection between the elements. A reversible coupling between the components may be achieved by a mechanical interlock that creates a joint. For example, FIG. 6 shows a base 658 having a slot 616 through which a latch 618 extends from a proximal end 606. When inserted into the slot 616, the latch 618 mechanically couples the base 658 and the second lever arm 654. The mechanical coupling may be through interference of the materials that form the latch and the slot, by friction, snap, ratchet, compression, and other techniques. By having a joint between the base 658 and the lever arm, assembly of the article of footwear may be simplified because the lever arm may be incorporated into the upper before it is coupled with the base. Thus, base 658, which may be sole 612 or may be integral with sole 612, may be assembled in a traditional manner for an article of footwear, and upper 614 may be assembled in a more traditional manner incorporating a lever arm, then sole 612, and upper 614 having a lever arm. For example, sole 612 may be joined to upper 614, whereby the lever arm may be joined simultaneously with the base.

[0054] Base 658 is affixed to or near the foot-facing surface of sole 612, and may be part of an outsole, part of a midsole, part of an insole, part of a strobel, a plate or sheet of material laminated between any of these sole layers, or any combination thereof. In particular, base 658 may include a rigid portion or section to which lever arms 652 and 654 are secured.

[0055] 7 illustrates an alternative article of footwear 710 having a collar elevator 750 according to embodiments herein. Specifically, the collar elevator is an example of a bifurcated collar elevator comprised of a first lever arm 752 having a proximal end 702 and a distal end 704, and a second lever arm 754 having a proximal end 707 and a distal end 708.

[0056] The lever arm of the bifurcated collar elevator, in one example, may extend around the heel end of the article of footwear. The lever arm of the bifurcated collar elevator, in another example, may terminate (e.g., at a distal end) before wrapping a portion of the heel end. It is further contemplated that the first lever arm may have a different length than the second lever arm, resulting in an asymmetric configuration in which there is at least one connection to the base by each of the lever arms. It is further contemplated that the first lever arm may extend from a first location on the base at a first location along the longitudinal length of the article of footwear, and the second lever arm extends from the base at a second location along the longitudinal length of the article of footwear that is different from the first location.

[0057] The article of footwear 710 includes an upper 714 coupled to a sole 712, the upper 714 including an ankle region 726 with an ankle collar 736. The ankle collar 736 is movable between a lowered state and an upright state. In the lowered state, the ankle collar 736 is positioned closer to the sole 712, and in the upright state, the ankle collar 736 is positioned farther from the sole 712. As provided herein, the sole can be an outsole, a midsole, and an insole, or any combination thereof.

[0058] The article of footwear 710 also includes a collar elevator 750 coupled to the upper 714 near the heel region 724 and / or the ankle region 726 and operable to move the ankle collar 736 from a lowered state to an upright state. The form of such coupling can vary, so long as the collar elevator 750 is coupled to the upper 714 (near the heel region 724 and / or the ankle region 726). For example, the collar elevator 750 can be coupled generally to the upper 714, the heel region 724, the ankle region 726, coupled to the ankle collar 337, or any and all combinations thereof.

[0059] For illustrative purposes, the upper 714 is shown with phantom dashed lines, and the collar elevator may be located at various points relative to the upper. For example, the collar elevator may be at least partially, and possibly completely, affixed between the exterior layer and the medial lining in the heel region, the ankle region, the ankle collar, or any and all combinations thereof. In another embodiment, the collar elevator may be at least partially exposed and located on the exterior or outer surface of the upper. In a further embodiment, at least a portion of the collar elevator may be located on the interior, foot-facing surface of the medial lining. In another embodiment, the collar elevator may be located on the exterior of the article of footwear and attached to the heel portion of the ankle collar by tabs, heat staking, bonding, stitching, or other bonding.

[0060] The first lever arm 752 and the second lever arm 754 are separate from and incorporated into a base such as the sole 712. Incorporation of components includes forming one component followed by forming another component. For example, the first lever arm 752 and the second lever arm 754 can be positioned in a tool used to shape the sole 712 (or a portion of the sole such as an outsole, midsole, insole, or portion of the sole) before or by forming the sole. For example, each of the lever arms can be positioned in a mold into which a polymer composition is introduced (e.g., injected or poured). Upon introduction of the polymer composition, the polymer composition surrounds the anchor portions 716, 718 built into the sole 712, and the portions of the lever arms extending from the proximal end to the distal end remain exposed. In additional examples, cavities, openings, or other volumes may be maintained during the initial formation of the sole 712 or as a result of post-forming operations, so that the anchors 716, 718 may be inserted into those spaces and then incorporated therein by a secondary process, such as filling the volumes that maintain the anchors with material. In this example, the lever arm may be introduced after the initial formation of both the sole and the secondary process incorporates the sole and lever arm, such as by curing a polymeric material complementary to the material from which the sole was formed.

[0061] The anchors 716, 718 may have any size or shape. In the embodiment shown, the anchors 716, 718 extend in a heel direction and have a cross-sectional shape that resists withdrawal through openings created in the sole 712 at each of the proximal ends of the lever arms. In alternative embodiments, it is contemplated that the anchors may extend in a toe direction from an incorporation point on the foot-facing surface of the sole. In yet other examples, it is contemplated that the anchors may extend in reverse directions (e.g., heel and toe directions) from an incorporation point on the foot-facing surface of the sole. Any further combination of sizes, orientations, and shapes are contemplated for the anchors.

[0062] 8 illustrates an alternative article of footwear 810 having a collar elevator 850 according to embodiments herein. Specifically, collar elevator 850 is an example of a bifurcated collar elevator comprised of a first lever arm 852 having a proximal end 802 and a distal end 804, and a second lever arm 854 having a proximal end 806 and a distal end 808.

[0063] The lever arm of the bifurcated collar elevator, in one example, may extend around the heel end of the article of footwear. The lever arm of the bifurcated collar elevator, in another example, may terminate (e.g., at a distal end) before wrapping a portion of the heel end. It is further contemplated that the first lever arm may have a different length than the second lever arm, resulting in an asymmetric configuration in which there is at least one connection to the base by each of the lever arms. It is further contemplated that the first lever arm may extend from a first location on the base at a first location along the longitudinal length of the article of footwear, and the second lever arm extends from the base at a second location along the longitudinal length of the article of footwear that is different from the first location.

[0064] Article of footwear 810 includes an upper 814 coupled to a sole 812, the upper 814 including an ankle region 826 with an ankle collar 836. The ankle collar 836 is movable between a lowered state and an upright state. In the lowered state, the ankle collar 836 is positioned closer to the sole 812 and in the upright state, the ankle collar 836 is positioned farther from the sole 812.

[0065] Article of footwear 810 also includes a collar elevator 850 coupled to upper 814 near heel region 824 and / or ankle region 826 and operable to move ankle collar 836 from a lowered state to an upright state. As long as collar elevator 850 is coupled to upper 814 (near heel region 824 and / or ankle region 826), the form of such coupling may vary. For example, collar elevator 850 may be coupled generally to upper 814, heel region 824, ankle region 826, coupled to ankle collar 338, or any and all combinations thereof.

[0066] For illustrative purposes, the upper 814 is shown with phantom dashed lines, and the collar elevator may be located at various points relative to the upper. For example, the collar elevator may be at least partially, and possibly completely, affixed between the exterior layer and the medial lining in the heel region, the ankle region, the ankle collar, or any and all combinations thereof. In another embodiment, the collar elevator may be at least partially exposed and located on the exterior or outer surface of the upper. In a further embodiment, at least a portion of the collar elevator may be located on the interior, foot-facing surface of the medial lining. In another embodiment, the collar elevator may be located on the exterior of the article of footwear and attached to the heel portion of the ankle collar by tabs, heat staking, bonding, stitching, or other bonding.

[0067] FIG. 8 illustrates a different embodiment of a base, where the base 816 may be attached to a portion of the upper (e.g., heel counter), a portion of the midsole sidewall, or any combination thereof, where the base 816 wraps around the underside of the article of footwear, as opposed to extending through the insole in the manner described for the base 558 of FIG. 5. This is a similar configuration to FIGS. 4A-4C provided previously, but with a bifurcated collar elevator. The base 816, like the other bases discussed herein, may be monolithic, coupled, or otherwise formed with one or more of the lever arms. Also, while shown having an upper edge that is above the foot-facing surface of the sole 812, it is contemplated that in alternative embodiments the base 816 may be recessed or incorporated into the sole 812.

[0068] As shown in Figures 5-8, the collar elevator may be bifurcated, and thus the distal ends of the first and second lever arms are considered to be independent of each other without a central connecting band. Although some embodiments are considered to have each of the bifurcated lever arms secured with a material forming at least a portion of the upper, even this common material indirectly connecting the bifurcated lever arms is still considered to be independent of each other and therefore bifurcated. It is also considered that any gap (shown in Figures 9B and 9C below) may be formed between the distal ends of the bifurcated lever arms. For example, the gap may be less than 1 mm, or in other instances may be more than 100 cm. The gap may be measured along the surface of the upper from between the distal ends in the upright position.

[0069] As contemplated throughout and as previously described, any combination of the base, the joint / connection / extension between the base and the lever arm, the size of the lever arm, the shape of the lever arm, the cross section of the lever arm, the angle between the base and the lever arm, the location of the base and / or the lever arm, and the orientation of the lever arm are contemplated in connection with the bifurcated collar elevator, and any of the materials provided herein in connection with the collar elevator and base are contemplated as applicable to the bifurcated collar elevator configuration.

[0070] 9A and 9B show another article of footwear 910 having a bifurcated collar elevator 950 and a heel pull 916 according to one embodiment of the disclosure. Of initial note in FIGS. 9A and 9B is the lack of overlap between the distal ends 904, 908 of the bifurcated collar elevator 950 and the heel pull 916. As will be discussed in more detail below, the heel pull 916 is effective to position the ankle collar 936 in an upright position relative to the bifurcated collar elevator 950. Additionally, the heel pull 916 is effective to move the upper 914 in the ankle region 926 back from a toe-oriented location between the lever arms of the bifurcated collar elevator 950 to a heel-oriented location, as may occur during the wearing process, as will be discussed below.

[0071] The article of footwear 910 includes an upper 914 coupled to a sole 912, the upper 914 including an ankle region 926 with an ankle collar 936. The ankle collar 936 is movable between a lowered state and an upright state. In the lowered state, the ankle collar 936 is positioned closer to the sole 912 and in the upright state, the ankle collar 936 is positioned farther from the sole 912.

[0072] The article of footwear 910 also includes a collar elevator 950 coupled to the upper 914 near the heel region 924 and / or the ankle region 926 and operable to move the ankle collar 936 from a lowered state to an upright state. As long as the collar elevator 950 is coupled to the upper 914 (near the heel region 924 and / or the ankle region 926), the form of such coupling may vary. For example, the collar elevator 950 may be coupled generally to the upper 914, the heel region 924, the ankle region 926, coupled to the ankle collar 339, or any and all combinations thereof.

[0073] The disclosure of FIGS. 5-8 is applicable to and thus incorporated into the heel pull configuration of FIGS. 9A and 9B. For example, any base structure may be implemented (e.g., monolithic, jointed, integrated and / or U-shaped). The bifurcated collar elevator 950 includes a first lever arm 952 and a second lever arm 954. The first lever arm 952 has a distal end 904 and the second lever arm 954 has a distal end 908. A distance 922 extends between the distal ends 904 and 908. The distance 922 is measured as a straight line between the distal-most points of each distal end. In this example, the straight line measurement does not take into account the curvature of the upper 914 about the heel end. In alternative examples, it is contemplated that the distance may be measured along the upper between the distal ends (e.g., along the curvature of the heel).

[0074] Although the heel pull 916 is shown as a loop, it is contemplated that the heel pull 916 may be replaced with a tab or other material having any thickness or number of layers. The heel pull may be integrally formed with the upper 914 or may be bonded to the upper 914. The heel pull 916 extends from the upper 914 in the ankle region 926 at a bond point 918. The bond point 918 may be a mechanical fastening point (e.g., stitch, rivet, snap) or a bond point (e.g., welded, glued) in one example. The bond point 918 may also be an opening in an outer layer of the upper 914 where the heel pull 916 extends from a more interior point to the exterior in another example. The bond point may be a lowest point of the heel pull 916 on the upper 914 (e.g., closest to the sole 912). The heel pull 916 has a width 920 at the bond point 918. In one example, the width 920 is a linear measurement. In an alternative example, width 920 is measured across the surface of upper 914 when in its intended configuration.

[0075] 9A and 9B show that the width 920 is less than the distance 922. Thus, in this example, the heel pull 916 does not overlap the distal end 904 or the distal end 908. Thus, in this example, the heel pull 916 can be used to recapture the ankle region 926 between the first lever arm 952 and the second lever arm 954 if the ankle region 926 is jagged (e.g., concave at the heel end as opposed to an intended convex shape at the heel end). The expansion of the distance 922 based on the change in the elevator collar configuration increases, in one example, the likelihood of a depression forming during wear of the article of footwear. Thus, the heel pull works in cooperation with the collar elevator 950 to resist the ankle region 926 and return it to its intended convex configuration (as viewed from the outside).

[0076] 10A and 10B show another article of footwear 1010 having a bifurcated collar elevator 1050 and a heel pull 1016 according to one embodiment of the disclosure. Of initial note in FIGS. 10A and 10B is the overlap between the distal ends 1004, 1008 of the bifurcated collar elevator 1050 and the heel pull 1016. As will be discussed in more detail below, the heel pull 1016 is effective to raise the ankle collar 1036 in an upright position relative to the bifurcated collar elevator 1050. Additionally, the heel pull 1016 is effective to return the upper 1014 in the ankle region 1026 from a toe-oriented location between the lever arms of the bifurcated collar elevator 1050 to a heel-oriented location, as may occur during the wearing process, as will be discussed below.

[0077] The article of footwear 1010 includes an upper 1014 coupled to a sole 1012, the upper 1014 including an ankle region 1026 with an ankle collar 1036. The ankle collar 1036 is movable between a lowered state and an upright state. In the lowered state, the ankle collar 1036 is positioned closer to the sole 1012 and in the upright state, the ankle collar 1036 is positioned farther from the sole 1012.

[0078] The article of footwear 1010 also includes a collar elevator 1050 coupled to the upper 1014 near the heel region 1024 and / or the ankle region 1026 and operable to move the ankle collar 1036 from a lowered state to an upright state. The form of such coupling can vary, so long as the collar elevator 1050 is coupled to the upper 1014 (near the heel region 1024 and / or the ankle region 1026). For example, the collar elevator 1050 can be coupled generally to the upper 1014, the heel region 1024, the ankle region 1026, coupled to the ankle collar 3310, or any and all combinations thereof.

[0079] The disclosure of FIGS. 5-8 is applicable to and thus incorporated into the heel pull configuration of FIGS. 10A and 10B. For example, any base structure may be implemented (e.g., monolithic, jointed, integrated and / or U-shaped). The bifurcated collar elevator 1050 includes a first lever arm 1052 and a second lever arm 1054. The first lever arm 1052 has a distal end 1004 and the second lever arm 1054 has a distal end 1008. A distance 1022 extends between the distal ends 1004 and 1008. The distance 1022 is measured as a straight line between the distal-most points of each distal end. In this example, the straight line measurement does not take into account the curvature of the upper 1014 around the heel end. In alternative examples, it is contemplated that the distance may be measured along the upper between the distal ends (e.g., along the curvature of the heel).

[0080] Although the heel pull 1016 is shown as a loop, it is contemplated that the heel pull 1016 may be replaced with a tab or other material having any thickness or number of layers. The heel pull may be integrally formed or may be bonded to the upper 1014. The heel pull 1016 extends from the upper 1014 in the ankle region 1026 at a bond point 1018. The bond point 1018 may be a mechanical fastening point (e.g., stitch, rivet, snap) or a bond point (e.g., welded, glued) in one example. The bond point 1018 may also be an opening in an outer layer of the upper 1014 where the heel pull 1016 extends from a more interior point to the exterior in another example. The bond point may be the lowest point of the heel pull 1016 on the upper 1014 (e.g., closest to the sole 1012). The heel pull 1016 has a width 920 at the bond point 1018. In one example, the width 920 is a linear measurement. In an alternative example, width 920 is measured across the surface of upper 1014 when in its intended configuration.

[0081] 10A and 10B show that the width 920 is greater than the distance 1022. Thus, in this example, the heel pull 1016 overlaps both the distal end 1004 and the distal end 1008. Thus, in this example, the heel pull 1016 helps add an indirectly connected bridge between the distal ends to resist concave deformation of the ankle region 926 during the donning process. For example, the heel pull 1016 not only helps the collar elevator 1050 return the ankle collar 1036 to an upright position, but the heel pull 1016 also helps the upper 1014 resist concave deformation between the distal ends 1004 and 1008 by increasing the thickness of material in the gap formed between them.

[0082] FIG. 10C provides a cross-sectional view of an article of footwear along section line 10C-10C of FIG. 10B according to an embodiment herein. As shown in this exemplary configuration, an inner material 1021 (e.g., a liner) is on the inner side of the first lever arm 1052, and an outer material 1019 is on the outer surface of the first lever arm 1052. The heel pull is shown overlapping a portion of the first lever arm 1052. The outer material 1019 is also positioned between the first lever arm 1052 and the heel pull 1016 such that the heel pull is indirectly coupled with the bifurcated collar elevator. Thus, the heel pull 1016 is part of the upper 1014 in this example, and the collar elevator is maintained in a bifurcated (e.g., non-continuous) state. By interposing the outer material (or any material) between the heel pull 1016 and the first lever arm 1052, the first and second lever arms can move independently.

[0083] Although a bifurcated collar elevator is shown in Figures 9A-10C, it is contemplated that the heel pull can be used in conjunction with alternative collar elevators. For example, a continuous collar elevator, an asymmetric collar elevator, or a wavy collar elevator can all be used in conjunction with the heel pulls provided herein.

[0084] 11 illustrates another article of footwear 1110 having a collar elevator 1150 and a collar slide 1116 according to one embodiment of the disclosure. The collar slide 1116 provides good foot entry for the wearer during the donning motion. For example, the collar slide extends heelward from a heel end point 1118 of the upper 1114 at an angle that aids in the donning motion.

[0085] The article of footwear 1110 includes an upper 1114 coupled to a sole 1112, the upper 1114 including an ankle region 1126 with an ankle collar 1136. The ankle collar 1136 is movable between a lowered state and an upright state. In the lowered state, the ankle collar 1136 is positioned closer to the sole 1112 and in the upright state, the ankle collar 1136 is positioned farther from the sole 1112.

[0086] The article of footwear 1110 also includes a collar elevator 1150 coupled to the upper 1114 near the heel region 1124 and / or ankle region 1126 and operable to move the ankle collar 1136 from a lowered state to an upright state. The form of such coupling can vary, so long as the collar elevator 1150 is coupled to the upper 1114 (near the heel region 1124 and / or ankle region 1126). For example, the collar elevator 1150 can be coupled generally to the upper 1114, the heel region 1124, the ankle region 1126, coupled to the ankle collar 3311, or any and all combinations thereof.

[0087] The disclosure of Figures 5-8 is applicable to and thus incorporated into the collar slide configurations of Figures 11 and 12. For example, any base structure may be implemented (e.g., monolithic, jointed, built-in and / or U-shaped). The bifurcated collar elevator 1150 includes a first lever arm and a second lever arm 1154. The first lever arm has a distal end and the second lever arm 1154 has a distal end 1108.

[0088] A horizontal line 1103 is shown to represent the ground contact plane of the article of footwear 1110 in its normal orientation and location. Line 1103 is tangent to the ground contacting surface 1101 of the sole 1112. A number of reference lines are shown extending from line 1103. The first is line 1105. Line 1105 represents a tangent extending from the collar slide 1116 proximate the heel end 1118. As previously mentioned, the heel end 1118 is a forward location (e.g., heelward) of the upper 1114 before transitioning to the collar slide 1116. Reference line 1113 extends between a heelward location on the sole 1112 and a heel-most location on the upper 1114 to help determine the heel end 1118 at the transition to the collar slide 1116. Line 1105 forms an angle 1107 with line 1103.

[0089] Second line 1109 is a reference line that extends tangentially to proximal end 1106 of second lever arm 1154. Second line 1109 forms angle 1111 with line 1103. In one example, it is contemplated that angle 1107 is less than angle 1111 so that the collar slide effectively aids in donning article of footwear 1110. In some examples, angle 1111 is 60 degrees or less. In other embodiments, angle 1111 is 45 degrees or less. In some examples, angle 1107 is 45 degrees or less. In additional examples, angle 1107 is 35 degrees or less. In some embodiments, the angles provided provide an effective collar slide 1116.

[0090] The collar slide has a proximal end at 1118, i.e., the uppermost heel end of the ankle collar 1136. The collar slide can be monolithic with the upper 1114 at the ankle collar 1136. In other embodiments, the ankle collar 1136 can be a separate component that is coupled with the upper 1114 at the ankle collar 1136. In some embodiments, the collar slide 1116 is at least partially resistant to deformation such that the collar slide 1115 maintains an inclined interface to the ankle collar 1136 even when a force is applied to the collar slide 1115 during a donning motion. Also, as shown, the distal end of the lever arm 1154 is considered to be inferior (e.g., below) to the collar slide 1116. Such relative positioning allows a downward force applied by the wearer's foot during a donning motion to begin to move the ankle collar 1136 into a lowered state against the collar elevator 1150.

[0091] 12 illustrates another article of footwear 1210 having a collar elevator 1250 and a collar slide 1216 according to one embodiment of the disclosure. The collar slide 1216 provides for good ingress of the wearer's foot during donning. For example, the collar slide extends heelward from a heel end location 1218 of the upper 1214 at an angle that aids in the donning motion. FIG. 12 provides an alternative ankle collar configuration with a lower profile heel end than the article of footwear 1110 of FIG. 11.

[0092] The article of footwear 1210 includes an upper 1214 coupled to a sole 1212, the upper 1214 including an ankle region 1226 with an ankle collar. The ankle collar is movable between a lowered state and an upright state. In the lowered state, the ankle collar is positioned closer to the sole 1212 and in the upright state, the ankle collar is positioned farther from the sole 1212.

[0093] The article of footwear 1210 also includes a collar elevator 1250 coupled to the upper 1214 near the heel region 1224 and / or ankle region 1226 and operable to move the ankle collar from a lowered state to an upright state. The form of such coupling can vary so long as the collar elevator 1250 is coupled to the upper 1214 (near the heel region 1224 and / or ankle region 1226). For example, the collar elevator 1250 can be coupled generally to the upper 1214, the heel region 1224, the ankle region 1226, coupled to the ankle collar 3312, or any and all combinations thereof. The bifurcated collar elevator 1250 includes a first lever arm and a second lever arm 1254. The first lever arm has a distal end and the second lever arm 1254 has a distal end 1208.

[0094] A horizontal line 1203 is shown to represent the ground contact plane of the article of footwear 1210 in its normal orientation and location. Line 1203 is tangent to the ground contacting surface 1201 of the sole 1212. A number of reference lines are shown extending from line 1203. The first is line 1205. Line 1205 represents a tangent extending from the collar slide 1216 proximate the heel end 1218. As previously mentioned, the heel end 1218 is the forward location (e.g., heelward) of the upper 1214 before transitioning to the collar slide 1216. Reference line 1213 extends between a heelward location on the sole 1212 and a heel-most location on the upper 1214 to help determine the heel end 1218 at the transition to the collar slide 1216. Line 1205 forms an angle 1207 with line 1203.

[0095] Second line 1209 is a reference line that extends tangentially to proximal end 1206 of second lever arm 1254. Second line 1209 forms angle 1211 with line 1203. In one example, it is contemplated that angle 1207 is less than angle 1211 so that the collar slide effectively aids in donning article of footwear 1210. In some examples, angle 1211 is 60 degrees or less. In other embodiments, angle 1211 is 45 degrees or less. In some examples, angle 1207 is 45 degrees or less. In additional examples, angle 1207 is 35 degrees or less. In some embodiments, the angles provided provide an effective collar slide 1216.

[0096] The collar slide has a proximal end at 1218, i.e., the uppermost heel end of the ankle collar. The collar slide can be monolithic with the upper 1214 at the ankle collar. In other embodiments, the ankle collar can be a separate component that is coupled with the upper 1214 at the ankle collar. In some embodiments, the collar slide 1216 is at least partially resistant to deformation such that the collar slide 1215 maintains an inclined interface to the ankle collar even when a force is applied to the collar slide 1215 during a donning motion. Also, as shown, the distal end of the lever arm 1254 is considered to be inferior (e.g., below) to the collar slide 1216. Such relative positioning allows a downward force applied by the wearer's foot during a donning motion to begin to move the ankle collar against the collar elevator 1250 to a lowered state.

[0097] Although a bifurcated collar elevator is shown in Figures 9A-10C, it is contemplated that the heel pull can be used in conjunction with alternative collar elevators. For example, a continuous collar elevator, an asymmetric collar elevator, or a wavy collar elevator can all be used in conjunction with the heel pulls provided herein.

[0098] 13A and 13B show another article of footwear 1310 having a bifurcated collar elevator 1350 and a collar stay 1316 according to one embodiment of the disclosure. FIG. 13A provides a side perspective view of the article of footwear 1310, while FIG. 13B provides a view of the heel end of the article of footwear 1310.

[0099] 13A and 13B is the lack of overlap between the distal ends 1304, 1308 of the bifurcated collar elevator 1350 and the collar stay 1316. As will be discussed in more detail below, the collar stay 1316 is effective to return the upper 1314 in the ankle region 1326 and resist the formation of a recess in the ankle collar 1336 during the donning motion.

[0100] The article of footwear 1310 includes an upper 1314 coupled to a sole 1312, the upper 1314 including an ankle region 1326 with an ankle collar 1336. The ankle collar 1336 is movable between a lowered state and an upright state. In the lowered state, the ankle collar 1336 is positioned closer to the sole 1312 and in the upright state, the ankle collar 1336 is positioned farther from the sole 1312.

[0101] The article of footwear 1310 also includes a collar elevator 1350 coupled to the upper 1314 near the heel region 1324 and / or the ankle region 1326 and operable to move the ankle collar 1336 from a lowered state to an upright state. As long as the collar elevator 1350 is coupled to the upper 1314 (near the heel region 1324 and / or the ankle region 1326), the form of such coupling may vary. For example, the collar elevator 1350 may be coupled generally to the upper 1314, the heel region 1324, the ankle region 1326, coupled to the ankle collar 3313, or any and all combinations thereof.

[0102] The disclosure of Figures 5-8 is applicable to and thus incorporated in the collar stay configuration of Figures 13A and 13B. For example, any base structure may be implemented (e.g., monolithic, jointed, integrated and / or U-shaped). The bifurcated collar elevator 1350 includes a first lever arm 1352 and a second lever arm 1354. The first lever arm 1352 has a distal end 1304 and the second lever arm 1354 has a distal end 1308. A distance 1320 extends between the distal end 1308 and the second end 1318 of the collar stay 1316. A distance 1321 extends between the distal end 1304 and the first end 1319 of the collar stay 1316. Thus, in this example, there is no overlap between the collar stay 1316 and the lever arms of the bifurcated collar elevator 1350.

[0103] The collar stay 1316 is a polymeric composition having a greater stiffness (i.e., stiffness is the degree to which an object resists deformation in response to an applied force) than the upper 1314 at the ankle region 1326. The supplemental stiffness provided by the collar stay 1316 resists deformation into a concave shape during donning. Additionally, by preventing overlap between the collar stay 1316 and the distal end of the collar elevator 1350, the collar elevator 1350 provides greater independent movement between the first lever arm 1352 and the second lever arm 1354, which may aid in the operation of the collar elevator 1350 in some instances.

[0104] 14A and 14B show another article of footwear 1410 having a bifurcated collar elevator 1450 and collar stays 1416 according to one embodiment of the disclosure. Of initial note in FIGS. 14A and 14B is the overlap between the distal ends 1404, 1408 of the bifurcated collar elevator 1450 and the collar stays 1416. As will be discussed in more detail below, the collar stays 1416, in conjunction with the bifurcated collar elevator 1450, are effective to prevent the upper 1414 in the ankle region 1426 from deforming into a concave configuration between the lever arms of the bifurcated collar elevator 1450 during the donning process, as will be described below.

[0105] The article of footwear 1410 includes an upper 1414 coupled to a sole 1412, the upper 1414 including an ankle region 1426 with an ankle collar 1436. The ankle collar 1436 is movable between a lowered state and an upright state. In the lowered state, the ankle collar 1436 is positioned closer to the sole 1412 and in the upright state, the ankle collar 1436 is positioned farther from the sole 1412.

[0106] The article of footwear 1410 also includes a collar elevator 1450 coupled to the upper 1414 near the heel region 1424 and / or the ankle region 1426 and operable to move the ankle collar 1436 from a lowered state to an upright state. As long as the collar elevator 1450 is coupled to the upper 1414 (near the heel region 1424 and / or the ankle region 1426), the form of such coupling may vary. For example, the collar elevator 1450 may be coupled generally to the upper 1414, the heel region 1424, the ankle region 1426, coupled to the ankle collar 3314, or any and all combinations thereof.

[0107] The disclosure of Figures 5-8 is applicable to and thus incorporated into the collar stay configurations of Figures 14A-14C. For example, any base structure may be implemented (e.g., monolithic, jointed, built-in and / or U-shaped). The bifurcated collar elevator 1450 includes a first lever arm 1452 and a second lever arm 1454. The first lever arm 1452 has a distal end 1404 and the second lever arm 1454 has a distal end 1408. The collar stay 1416 overlaps both the distal ends 1404 and 1408.

[0108] The overlap of the collar stay 1416 and the bifurcated collar elevator 1350 allows for the transmission of toe-directed forces generated by the wearer's foot being inserted into the article of footwear 1410 during the donning motion. The increased stiffness of the collar stay 1416 relative to the upper 1414 in the ankle region 1426 is effective in transmitting the toe-directed forces to the collar elevator 1350. Such force transmission allows the ankle collar 1436 to resist deformation into a concave shape. In other words, the collar stay 1416 is effective in converting the toe-directed forces into lateral forces as a bridge, which are then transmitted through the first lever arm 1452 and the second lever arm 1454, preventing the ankle collar from deforming inwardly toward the toe end.

[0109] FIG. 14C provides a cross-sectional view of an article of footwear along section line 14C-14C of FIG. 14B according to an embodiment herein. As shown in this exemplary configuration, an inner material 1421 (e.g., a liner) is on an inner side of a first lever arm 1452 and an outer material 1419 is on an outer surface of the first lever arm 1452. A collar stay 1416 is shown overlapping a portion of the first lever arm 1452. Additionally, the outer material 1419 is positioned between the first lever arm 1452 and the collar stay 1416 such that the collar stay 1416 is indirectly coupled with a bifurcated collar elevator. Thus, the collar stay 1416 is part of the upper 1414 in this example, and the collar elevator is maintained in a bifurcated (e.g., non-continuous) state. Interposing an outer material 1419 (or any material) between the collar stay 1416 and the first lever arm 1452 allows the first and second lever arms to move independently.

[0110] Although a bifurcated collar elevator is shown in Figures 14A-14C, it is contemplated that the collar stays may be used in conjunction with alternative collar elevators. For example, continuous collar elevators, asymmetric collar elevators, or wavy collar elevators may all be used in conjunction with the collar stays provided herein.

[0111] Turning to FIG. 15, an article of footwear 1510 having a collar elevator 1550 is shown according to an embodiment herein. Specifically, the collar elevator is an example of an asymmetric collar elevator comprised of a first lever arm 1552 having a proximal end 1502 and a distal end 1504. The asymmetric collar elevator is distinguished from collar elevator 350 of FIG. 3A because the distal end 1504 of the first lever arm is non-continuous with a base, such as a sole, while the proximal end 1502 is continuous with, joined, incorporated or otherwise connected to a base.

[0112] The asymmetric collar elevator provides advantages to footwear assembly in some examples. Instead of forming a footwear upper around a continuous collar elevator or threading a continuous collar elevator through a channel in the footwear upper from a first side to a second side of the footwear during assembly, in one example, the asymmetric collar elevator may be more easily incorporated due to the discontinuous nature of the lever arm relative to the base on both ends of the lever arm. Further advantages of the asymmetric collar elevator may include a reduction in material and associated weight at the distal end 1504. Still other potential advantages of the asymmetric collar elevator over a continuous collar elevator include variable response, such that in one example, a first lever arm has a different response on a first side of the footwear article compared to other sides of the footwear article. Thus, the asymmetric collar elevator provides various advantages from a continuous collar elevator, such as the one illustrated in FIG. 3A, in some examples.

[0113] The lever arm of the asymmetric collar elevator, in one example, can extend around the heel end of the article of footwear. The lever arm of the asymmetric collar elevator, in another example, can terminate (e.g., at the distal end) before wrapping around a portion of the heel end.

[0114] The article of footwear 1510 includes an upper 1514 coupled to a sole 1512, the upper 1514 including an ankle region 1526 with an ankle collar 1536. The ankle collar 1536 is movable between a lowered state and an upright state. In the lowered state, the ankle collar 1536 is positioned closer to the sole 1512 and in the upright state, the ankle collar 1536 is positioned farther from the sole 1512.

[0115] The article of footwear 1510 also includes a collar elevator 1550 coupled to the upper 1514 near the heel region 1524 and / or the ankle region 1526 and operable to move the ankle collar 1536 from a lowered state to an upright state. The form of such coupling can vary, so long as the collar elevator 1550 is coupled to the upper 1514 (near the heel region 1524 and / or the ankle region 1526). For example, the collar elevator 1550 can be coupled generally to the upper 1514, the heel region 1524, the ankle region 1526, coupled to the ankle collar 3316, or any and all combinations thereof.

[0116] For illustrative purposes, the upper 1514 is shown with phantom dashed lines, and the collar elevator may be located at various points relative to the upper. For example, the collar elevator may be at least partially, and possibly completely, affixed between the exterior layer and the medial lining in the heel region, the ankle region, the ankle collar, or any and all combinations thereof. In another embodiment, the collar elevator may be at least partially exposed and located on the exterior or outer surface of the upper. In a further embodiment, at least a portion of the collar elevator may be located on the interior, foot-facing surface of the medial lining. In another embodiment, the collar elevator may be located on the exterior of the article of footwear and attached to the heel portion of the ankle collar by tabs, heat staking, bonding, stitching, or other bonding.

[0117] The first lever arm 1552 is monolithic to the base 1558. A monolithic construction refers to one that is formed or constructed of a material without joints or seams. Thus, at the junction between the first lever arm 1552 and the base 1558, there is no joint, seam, or other connection at the junction. Instead, the material forming the base 1558 extends continuously to the second lever arm 1554. For example, the lever arm and the base may, in one example, be formed as a common part in a common operation, such as by a molding operation.

[0118] Base 1558 is affixed to or near the foot-facing surface of sole 1512, and may be part of an outsole, part of a midsole, part of an insole, part of a strobel, a plate or sheet of material laminated between any of these sole layers, or any combination thereof. In particular, base 1558 may include a rigid portion or section to which lever arms 1552 and 1554 are secured.

[0119] 16 illustrates an alternative article of footwear 1610 having a collar elevator 1650, according to embodiments herein. Specifically, the collar elevator is an example of an asymmetric collar elevator comprised of a first lever arm 1652 having a proximal end 1602 and a distal end 1604.

[0120] The lever arm of the asymmetric collar elevator, in one example, can extend around the heel end of the article of footwear. The lever arm of the asymmetric collar elevator, in another example, can terminate (e.g., at the distal end) before wrapping around a portion of the heel end.

[0121] The article of footwear 1610 includes an upper 1614 coupled to a sole 1612, the upper 1614 including an ankle region 1626 with an ankle collar 1636. The ankle collar 1636 is movable between a lowered state and an upright state. In the lowered state, the ankle collar 1636 is positioned closer to the sole 1612 and in the upright state, the ankle collar 1636 is positioned farther from the sole 1612.

[0122] The article of footwear 1610 also includes a collar elevator 1650 coupled to the upper 1614 near the heel region 1624 and / or the ankle region 1626 and operable to move the ankle collar 1636 from a lowered state to an upright state. The form of such coupling can vary, so long as the collar elevator 1650 is coupled to the upper 1614 (near the heel region 1624 and / or the ankle region 1626). For example, the collar elevator 1650 can be coupled generally to the upper 1614, the heel region 1624, the ankle region 1626, coupled to the ankle collar 3316, or any and all combinations thereof.

[0123] For illustrative purposes, the upper 1614 is shown with phantom dashed lines, and the collar elevator may be located at various points relative to the upper. For example, the collar elevator may be at least partially, and possibly completely, affixed between the exterior layer and the medial lining in the heel region, the ankle region, the ankle collar, or any and all combinations thereof. In another embodiment, the collar elevator may be at least partially exposed and located on the exterior or outer surface of the upper. In a further embodiment, at least a portion of the collar elevator may be located on the interior, foot-facing surface of the medial lining. In another embodiment, the collar elevator may be located on the exterior of the article of footwear and attached to the heel portion of the ankle collar by tabs, heat staking, bonding, stitching, or other bonding.

[0124] The first lever arm 1652 is separate from and coupled to the base 1658. The coupling arrangement may be reversibly coupled or permanently coupled. A permanent joint may occur by adhesive bonding, welding, or other methods that result in an irreversible chemical or physical connection between the elements. A reversible coupling between the components may be achieved by a mechanical interlock that creates a joint. For example, FIG. 16 shows a base 1658 having a slot 1616 through which a latch 1618 extends from a distal end 1606. When inserted into the slot 1616, the latch 1618 mechanically couples the base 1658 and the first lever arm 1652. The mechanical coupling may be through interference of the materials that form the latch and the slot, by friction, snap, ratchet, compression, and other techniques. By having a joint between the base 1658 and the lever arm, assembly of the article of footwear may be simplified because the lever arm may be incorporated into the upper before it is coupled with the base. Thus, the base 1658, which may be the sole 1612 or may be integral with the sole 1612, may be assembled in a traditional manner for an article of footwear, and the upper 1614 may be assembled in a more traditional manner, incorporating a lever arm and then the sole 1612 and the upper 1614 having a lever arm. For example, the lever arm may be joined simultaneously with the base, by the sole 1612 being joined with the upper 1614.

[0125] Base 1658 is affixed to or near the foot-facing surface of sole 1612, and may be part of an outsole, part of a midsole, part of an insole, part of a strobel, a plate or sheet of material laminated between any of these sole layers, or any combination thereof. In particular, base 1658 may include a rigid portion or section to which lever arm 1652 is secured.

[0126] 17 illustrates an alternative article of footwear 1710 having a collar elevator 1750, according to embodiments herein. Specifically, the collar elevator is an example of an asymmetric collar elevator comprised of a first lever arm 1752 having a proximal end 1702 and a distal end 1704.

[0127] The lever arm of the asymmetric collar elevator, in one example, can extend around the heel end of the article of footwear. The lever arm of the asymmetric collar elevator, in another example, can terminate (e.g., at the distal end) before wrapping around a portion of the heel end.

[0128] The article of footwear 1710 includes an upper 1714 coupled to a sole 1712, the upper 1714 including an ankle region 17216 with an ankle collar 17316. The ankle collar 1736 is movable between a lowered state and an upright state. In the lowered state, the ankle collar 1736 is positioned closer to the sole 1712 and in the upright state, the ankle collar 1736 is positioned farther from the sole 1712.

[0129] The article of footwear 1710 also includes a collar elevator 1750 coupled to the upper 1714 near the heel region 1724 and / or the ankle region 1726 and operable to move the ankle collar 1736 from a lowered state to an upright state. As long as the collar elevator 1750 is coupled to the upper 1714 (near the heel region 1724 and / or the ankle region 1726), the form of such coupling may vary. For example, the collar elevator 1750 may be coupled generally to the upper 1714, the heel region 1724, the ankle region 1726, coupled to the ankle collar 1736, or any and all combinations thereof.

[0130] For illustrative purposes, the upper 1714 is shown with phantom dashed lines, and the collar elevator may be located at various points relative to the upper. For example, the collar elevator may be at least partially, and possibly completely, affixed between the exterior layer and the medial lining in the heel region, the ankle region, the ankle collar, or any and all combinations thereof. In another embodiment, the collar elevator may be at least partially exposed and located on the exterior or outer surface of the upper. In a further embodiment, at least a portion of the collar elevator may be located on the interior, foot-facing surface of the medial lining. In another embodiment, the collar elevator may be located on the exterior of the article of footwear and attached to the heel portion of the ankle collar by tabs, heat staking, bonding, stitching, or other bonding.

[0131] The first lever arm 1752 is separate from and incorporated into a base, such as the sole 1712. Incorporation of a component includes forming one component followed by forming another component. For example, the first lever arm 1752 may be positioned in a tool used to mold the sole 1712 (or a portion of the sole) before or by forming the sole. For example, the lever arm may be positioned in a mold into which the polymer composition is introduced (e.g., injected or poured). Upon introduction of the polymer composition, the polymer composition surrounds the anchor portion 1716 incorporated into the sole 1712, and the portion of the lever arm extending from the proximal end to the distal end remains exposed. In additional examples, cavities, openings, or other volumes may be maintained during the initial formation of the sole 1712, such that the anchors 1716 may be inserted into those spaces and then incorporated therein by a secondary process, such as filling the volume that maintains the anchors with material. In this example, the lever arm may be introduced after the initial formation of both the sole and the secondary process incorporates the sole and lever arm, such as by curing a polymeric material complementary to the material from which the sole was formed.

[0132] The anchor 1716 may have any size or shape. In the embodiment shown, the anchor 1716 extends in a heel direction and has a cross-sectional shape that resists withdrawal through an opening created in the sole 1712 at the proximal end of the lever arm. In alternative embodiments, it is contemplated that the anchor may extend in a toe direction from an incorporation point on the foot-facing surface of the sole. In yet other examples, it is contemplated that the anchor may extend in reverse directions (e.g., heel and toe directions) from an incorporation point on the foot-facing surface of the sole. Any further combination of sizes, orientations, and shapes are contemplated for the anchor.

[0133] 18 illustrates an alternative article of footwear 1810 having a collar elevator 1850, according to embodiments herein. Specifically, collar elevator 1850 is an example of an asymmetric collar elevator comprised of a first lever arm 1852 having a proximal end 1802 and a distal end 1804.

[0134] The lever arm of the asymmetric collar elevator, in one example, can extend around the heel end of the article of footwear. The lever arm of the asymmetric collar elevator, in another example, can terminate (e.g., at the distal end) before wrapping around a portion of the heel end.

[0135] The article of footwear 1810 includes an upper 1814 coupled to a sole 1812, the upper 1814 including an ankle region 1826 with an ankle collar 1836. The ankle collar 1836 is movable between a lowered state and an upright state. In the lowered state, the ankle collar 1836 is positioned closer to the sole 1812 and in the upright state, the ankle collar 1836 is positioned farther from the sole 1812.

[0136] The article of footwear 1810 also includes a collar elevator 1850 coupled to the upper 1814 near the heel region 1824 and / or the ankle region 1826 and operable to move the ankle collar 1836 from a lowered state to an upright state. As long as the collar elevator 1850 is coupled to the upper 1814 (near the heel region 1824 and / or the ankle region 1826), the form of such coupling may vary. For example, the collar elevator 1850 may be coupled generally to the upper 1814, the heel region 1824, the ankle region 1826, coupled to the ankle collar 1836, or any and all combinations thereof.

[0137] For illustrative purposes, the upper 1814 is shown with phantom dashed lines, and the collar elevator may be located at various points relative to the upper. For example, the collar elevator may be at least partially, and possibly completely, affixed between the exterior layer and the medial lining in the heel region, the ankle region, the ankle collar, or any and all combinations thereof. In another embodiment, the collar elevator may be at least partially exposed and located on the exterior or outer surface of the upper. In a further embodiment, at least a portion of the collar elevator may be located on the interior, foot-facing surface of the medial lining. In another embodiment, the collar elevator may be located on the exterior of the article of footwear and attached to the heel portion of the ankle collar by tabs, heat staking, bonding, stitching, or other bonding.

[0138] FIG. 18 illustrates a different embodiment of a base, where the base 1816 may be attached to a portion of the upper (e.g., heel counter), a portion of the midsole sidewall, or any combination thereof, where the base 1816 wraps around the underside of the article of footwear as opposed to extending through the insole in the manner described for the base 1558 of FIG. 15. This is a similar configuration to FIGS. 4A-4C provided previously, but with an asymmetric collar elevator. The base 1816 may be monolithic, coupled, or otherwise formed with a lever arm, as with the other bases discussed herein. Also, while shown having an upper edge that overlies the foot-facing surface of the sole 1812, it is contemplated that in alternative embodiments the base 1816 may be recessed or incorporated into the sole 1812.

[0139] As contemplated throughout and as previously described, any combination of the base, the joint / connection / extension between the base and the lever arm, the size of the lever arm, the shape of the lever arm, the cross section of the lever arm, the angle between the base and the lever arm, the location of the base and / or the lever arm, and the orientation of the lever arm are contemplated in connection with an asymmetric collar elevator, and any of the materials provided herein in connection with the collar elevator and base are contemplated as applicable to an asymmetric collar elevator configuration.

[0140] 19A and 19B show another article of footwear 1910 having a scalloped collar elevator 1950 according to one embodiment of the disclosure. FIG. 19A shows the article of footwear 1910 in an upright position, and FIG. 19B shows the article of footwear 1910 in a lowered position.

[0141] The article of footwear 1910 includes an upper 1914 coupled to a sole 1912, the upper 1914 including an ankle region 1926 with an ankle collar 1936. The ankle collar 1936 is movable between a lowered state ( FIG. 19B ) and an upright state ( FIG. 19A ). In the lowered state, the ankle collar 1936 is positioned closer to the sole 1912 and in the upright state, the ankle collar 1936 is positioned farther from the sole 1912.

[0142] The article of footwear 1910 also includes a collar elevator 1950 coupled to the upper 1914 near the heel region 1924 and / or the ankle region 1926 and operable to move the ankle collar 1936 from a lowered state to an upright state. As long as the collar elevator 1950 is coupled to the upper 1914 (near the heel region 1924 and / or the ankle region 1926), the form of such coupling may vary. For example, the collar elevator 1950 may be coupled generally to the upper 1914, the heel region 1924, the ankle region 1926, coupled to the ankle collar 1936, or any and all combinations thereof.

[0143] For illustrative purposes, the upper 1914 is shown with phantom dashed lines, and the collar elevator may be located at various points relative to the upper. For example, the collar elevator may be at least partially, and possibly completely, affixed between the exterior layer and the medial lining in the heel region, the ankle region, the ankle collar, or any and all combinations thereof. In another embodiment, the collar elevator may be at least partially exposed and located on the exterior or outer surface of the upper. In a further embodiment, at least a portion of the collar elevator may be located on the interior, foot-facing surface of the medial lining. In another embodiment, the collar elevator may be located on the exterior of the article of footwear and attached to the heel portion of the ankle collar by tabs, heat staking, bonding, stitching, or other bonding.

[0144] The wavy collar elevator 1950 is comprised of a first lever arm 1952 having a proximal end 1902 and a distal end 1904, and a second lever arm 1954 having a proximal end 1906 and a distal end 1908. In this example, the lever arms are essentially wavy. A wavy lever arm is a level arm having a continuous curve that may be wavy, curved or sharp in alternating directions for at least a portion of the length between the proximal and distal ends of the lever arm. The wavy structure is effective for dynamic change in at least two ways. The first way of change or movement is an extension along the longitudinal length, much like a spring that is tensioned (e.g., Figs. 19A and 19B) or compressed (e.g., Figs. 20A and 20B). The second way of change or movement is within a plane defined by the wavy structure (e.g., a plane in which a continuous change of direction occurs) by the structure curving or flexing to change the shape or form of one or more wavy portions of the structure. Thus, the exemplary corrugated structure is effective to elastically accommodate stretching and bending, as in Figures 19A and 19B, to create a wider opening for wearing and then return to its original position to secure the article of footwear around the wearer's foot.

[0145] In the upright state, FIG. 19A shows a first lever arm 1952 having a length 1916 between the proximal end 1902 and the distal end 1904. Additionally, an exemplary angle 1917 is shown between the corrugations on the upper side of the first lever arm 1952. In the lowered state of FIG. 19B, the length of the first lever arm 1952 is shown as length 1918, and an angle 1919 is shown between the corrugations on the upper side of the first lever arm 1952. As discussed above, the corrugated structure is effective to elastically stretch and flex to aid in donning. Thus, the length 1918 is longer than the length 1916 that corresponds to its extension in the lowered state. Similarly, the angle 1919 is greater than the angle 1917 to represent the flexing or articulation that occurs to achieve the lowered state. As the corrugated lever arm is considered to be formed due to the elastic materials provided herein, the corrugated structure is effective to be biased against stretching and flexing to return to the upright state.

[0146] The first lever arm 1952 and the second lever arm 1954 may be monolithic, separate, bonded, incorporated, or otherwise coupled to a base 1958. The base 1958 is affixed to or near the foot-facing surface of the sole 1912, and the base 1958 may be part of an outsole, part of a midsole, part of an insole, part of a strobel, a plate or sheet of material laminated between any of these sole layers, or any combination thereof. In particular, the base 1958 may include a rigid portion or section to which the lever arms 1952 and 1954 are secured. Any base configuration is contemplated in connection with one or more corrugated lever arms.

[0147] 20A and 20B show another article of footwear 2010 having a scalloped collar elevator 2050 according to one embodiment of the disclosure. FIG. 20A shows the article of footwear 2010 in an upright position, while FIG. 20B shows the article of footwear 2010 in a lowered position.

[0148] The article of footwear 2010 includes an upper 2014 coupled to a sole 2012, the upper 2014 including an ankle region 2026 with an ankle collar 2036. The ankle collar 2036 is movable between a lowered state (FIG. 20B) and an upright state (FIG. 20A). In the lowered state, the ankle collar 2036 is positioned closer to the sole 2012 and in the upright state, the ankle collar 2036 is positioned farther from the sole 2012.

[0149] The article of footwear 2010 also includes a collar elevator 2050 coupled to the upper 2014 near the heel region 2024 and / or the ankle region 2026 and operable to move the ankle collar 2036 from a lowered state to an upright state. The form of such coupling can vary, so long as the collar elevator 2050 is coupled to the upper 2014 (near the heel region 2024 and / or the ankle region 2026). For example, the collar elevator 2050 can be coupled generally to the upper 2014, the heel region 2024, the ankle region 2026, coupled to the ankle collar 2036, or any and all combinations thereof.

[0150] For illustrative purposes, the upper 2014 is shown with phantom dashed lines, and the collar elevator may be located at various points relative to the upper. For example, the collar elevator may be at least partially, and possibly completely, affixed between the exterior layer and the medial lining in the heel region, the ankle region, the ankle collar, or any and all combinations thereof. In another embodiment, the collar elevator may be at least partially exposed and located on the exterior or outer surface of the upper. In a further embodiment, at least a portion of the collar elevator may be located on the interior, foot-facing surface of the medial lining. In another embodiment, the collar elevator may be located on the exterior of the article of footwear and attached to the heel portion of the ankle collar by tabs, heat staking, bonding, stitching, or other bonding.

[0151] The scalloped collar elevator 2050 is comprised of a first lever arm 2052 having a proximal end 2002 and a distal end 2004. The first lever arm 2052 is positioned at the heel end, which may be referred to as the Achilles region of the article in this example. Such a configuration may sometimes be referred to as a spine structure or shoehorn structure, as it is more vertically oriented and centrally located between the medial and lateral sides. The first lever arm 1952 is inherently resilient and will naturally prefer the upright position of FIG. 20A. However, during wear of the article of footwear 2010, the collar elevator 2050 is compressible and may flex in the longitudinal direction of the article of footwear (toward the heel in the example of FIG. 20B). Such compressibility is evidenced by the difference between the length 2016 in FIG. 20A and the length 2018 in FIG. 20B, which extends between the proximal end 2002 and the distal end 2004. The length 2018 is less than the length 2016. Compressibility may also be evidenced by the angle change of the corrugations of the first lever arm 2052. The angle 2017 of the corrugations in the upright state of Figure 20A is greater than the angle 2019 of the corrugations in the lowered state of Figure 20B.

[0152] The first lever arm 2052 may be monolithic, separate, bonded, incorporated, or otherwise connected to a base 2058. The base 2058 is affixed to or near the foot-facing surface of the sole 2012, and the base 2058 may be part of an outsole, part of a midsole, part of an insole, part of a strobel, a plate or sheet of material laminated between any of these sole layers, or any combination thereof. In particular, the base 2058 may include a rigid portion or section to which the lever arm 2052 is secured. Any base configuration is contemplated in connection with the wavy lever arm.

[0153] FIG. 21 illustrates another article of footwear 2110 having a C-shaped bifurcated collar elevator 2150 according to one embodiment of the disclosure.

[0154] The article of footwear 2110 includes an upper 2114 coupled to a sole 2112, the upper 2114 including an ankle region 2126 with an ankle collar 2136. The ankle collar 2136 is movable between a lowered state and an upright state. In the lowered state, the ankle collar 2136 is positioned closer to the sole 2112 and in the upright state, the ankle collar 2136 is positioned farther from the sole 2112.

[0155] The article of footwear 2110 also includes a collar elevator 2150 coupled to the upper 2114 near the heel region 2124 and / or the ankle region 2126 and operable to move the ankle collar 2136 from a lowered state to an upright state. The form of such coupling can vary, so long as the collar elevator 2150 is coupled to the upper 2114 (near the heel region 2124 and / or the ankle region 2126). For example, the collar elevator 2150 can be coupled generally to the upper 2114, the heel region 2124, the ankle region 2126, coupled to the ankle collar 2136, or any and all combinations thereof.

[0156] For illustrative purposes, the upper 2114 is shown with phantom dashed lines, and the collar elevator may be located at various points relative to the upper. For example, the collar elevator may be at least partially, and possibly completely, affixed between the exterior layer and the medial lining in the heel region, the ankle region, the ankle collar, or any and all combinations thereof. In another embodiment, the collar elevator may be at least partially exposed and located on the exterior or outer surface of the upper. In a further embodiment, at least a portion of the collar elevator may be located on the interior, foot-facing surface of the medial lining. In another embodiment, the collar elevator may be located on the exterior of the article of footwear and attached to the heel portion of the ankle collar by tabs, heat staking, bonding, stitching, or other bonding.

[0157] The C-shaped collar elevator 2150 is comprised of a first lever arm 2152 having a proximal end 2102 and a distal end 2104, and a second lever arm 2154 having a proximal end 2106 and a distal end 2108. In this example, the lever arm has a "C" profile, with the proximal and distal ends in a heel-direction of a curved central portion. It is contemplated that the "C" profile may alternatively be positioned in the opposite orientation (with the proximal and distal ends in a toe-direction) for some embodiments herein. The C-shaped structure is effective for elastic compression in the vertical direction. Additionally, it is contemplated that the C-shape may roll or otherwise move in a heel-direction during the donning motion to further permit access for foot entry into the article of footwear.

[0158] The first lever arm 2152 and the second lever arm 2154 may be monolithic, separate, bonded, incorporated, or otherwise coupled to a base 2158. The base 2158 is affixed to or near the foot-facing surface of the sole 2112, and the base 2158 may be part of an outsole, part of a midsole, part of an insole, part of a strobel, a plate or sheet of material laminated between any of these sole layers, or any combination thereof. In particular, the base 2158 may include a rigid portion or section to which the lever arms 2152 and 2154 are secured. Any base configuration is contemplated in connection with one or more C-shaped lever arms.

[0159] FIG. 22 illustrates another article of footwear 2210 having a biased collar elevator 2250 according to one embodiment of the disclosure.

[0160] The article of footwear 2210 includes an upper 2214 coupled to a sole 2212, the upper 2214 including an ankle region 2226 with an ankle collar 2236. The ankle collar 2236 is movable between a lowered state and an upright state. In the lowered state, the ankle collar 2236 is positioned closer to the sole 2212 and in the upright state, the ankle collar 2236 is positioned farther from the sole 2212.

[0161] The article of footwear 2210 also includes a collar elevator 2250 coupled to the upper 2214 near the heel region 2224 and / or the ankle region 2226 and operable to move the ankle collar 2236 from a lowered state to an upright state. The form of such coupling can vary, so long as the collar elevator 2250 is coupled to the upper 2214 (near the heel region 2224 and / or the ankle region 2226). For example, the collar elevator 2250 can be coupled generally to the upper 2214, the heel region 2224, the ankle region 2226, coupled to the ankle collar 2236, or any and all combinations thereof.

[0162] For illustrative purposes, the upper 2214 is shown with phantom dashed lines, and the collar elevator may be located at various points relative to the upper. For example, the collar elevator may be at least partially, and possibly completely, affixed between the exterior layer and the medial lining in the heel region, the ankle region, the ankle collar, or any and all combinations thereof. In another embodiment, the collar elevator may be at least partially exposed and located on the exterior or outer surface of the upper. In a further embodiment, at least a portion of the collar elevator may be located on the interior, foot-facing surface of the medial lining. In another embodiment, the collar elevator may be located on the exterior of the article of footwear and attached to the heel portion of the ankle collar by tabs, heat staking, bonding, stitching, or other bonding.

[0163] The collar elevator 2250 is formed from a heel structure 2201 that is flexibly coupled to the base 2258 at point 2207. The heel structure extends superiorly to an upper edge 2209 near the ankle collar 2236. The heel structure 2201 can be any material, but in embodiments, the heel structure 2201 is formed of a material that has greater stiffness than the upper 2214 in the heel region 2224. The heel structure 2201 may also be referred to herein as a lever arm or first lever arm. The heel structure 2201 is shown as having a curve that extends from the medial to lateral direction. In one example, this curve improves resistance to bending of the heel structure 2201 (e.g., moving from the upright position shown to a lowered position). For example, during a donning motion, the upper edge 2209 may move toward the heel and toward the sole 2212 to provide greater access into the article of footwear. This directional movement of the heel region 2224 may be biased in several ways.

[0164] The first biasing manner is the aforementioned curvature from medial to lateral direction by the heel region 2224. The curvature provides a natural resistance to bending by causing a curvilinear deformation causing the heel structure 2201 to bend to the lowered state. The second biasing manner is the elastic properties of the material forming the heel structure 2201. By forming at least a portion of the heel structure 2201 that is deformed to achieve the lowered state from an elastic material as provided herein, a return force to the upright state is provided. The third biasing manner is provided by the first elastic member 2203 and the second elastic member 2205. The elastic members may be inherently elastic, for example having a lower Young's modulus than the heel structure 2201. Each of the elastic members extends between the sole 2212 (e.g., base 2258) and the heel structure 2201 in an orientation effective to resist a transition from the upright state to the lowered state. In an exemplary embodiment, the elastic members may be formed from an elastomeric composition such as spandex or other elastic material. Each of the elastic members may be incorporated into, bonded to, mechanically attached to, or otherwise connected to the sole 2212, the base 2258, and / or the heel structure 2201.

[0165] The heel structure 2201 may be monolithic, separate, bonded, incorporated, or otherwise coupled to the base 2258. The base 2258 is affixed to or near the foot-facing surface of the sole 2212, and the base 2258 may be a portion of an outsole, a portion of a midsole, a portion of an insole, a portion of a strobel, a plate or sheet of material laminated between any of these sole layers, or any combination thereof. In particular, the base 2258 may include a rigid portion or section to which the heel structure 2201 is secured. Any base configuration is contemplated in connection with the heel structure 2201.

[0166] FIG. 23 illustrates another article of footwear 2310 having a continuous collar elevator 2350 and a multi-piece base 2358 according to one embodiment of the disclosure. The multi-piece base 2358 is another example of a base structure that may provide many advantages in some examples. In a first example, configuring the multi-piece base 2358 with a first anchor 2301 and a second anchor 2303 from which the collar elevator components extend increases the flexibility of the article of footwear 2310. For example, the anchors may limit some of the functionality of the sole 2312 if they are formed from a harder material than the sole 2312 to which they are coupled. For example, flexibility and ability to conform as a foot support surface may be hindered by a continuous base structure under the foot, but having a multi-piece base allows independent movement of the base elements to counteract changes in forces. This ability to better counteract changes in forces may also translate to responsive characteristics of the sole 2312 in one example due to the coupling between the sole 2312 and the anchors.

[0167] Another example of the advantages of the multi-piece base 2358 can be seen from an assembly standpoint. Having a multi-piece base allows for alternative assembly of the footwear article since positioning smaller pieces can provide more flexibility during assembly as compared to positioning and fastening a single base unit of similar size or dimensions to multiple pieces forming the base. Additionally, it is contemplated that in some instances material cost savings and weight reduction can be achieved with a multi-piece base as compared to a monolithic base.

[0168] The continuous collar elevator 2350 may be monolithic, separate, bonded, incorporated, or otherwise connected to a base 2358. The base 2358 is affixed to or near the foot-facing surface of the sole 2312, and the base 2358 may be part of an outsole, part of a midsole, part of an insole, part of a strobel, a plate or sheet of material incorporated / embedded in the sole provided above and laminated between any of these sole layers, or any combination thereof. In particular, the base 2358 may include a rigid portion or section to which the collar elevator 2350 is secured.

[0169] 24 illustrates another article of footwear 2410 having an upper 2414, a bifurcated collar elevator 2450, and a multi-piece base 2458, according to one embodiment of the disclosure. The multi-piece base 2458 is comprised of a first anchor 2401 and a second anchor 2403.

[0170] The bifurcated collar elevator 2450 may be monolithic, separate, bonded, incorporated, or otherwise coupled to a base 2458. The base 2458 is affixed to or near the foot-facing surface of the sole 2412, and the base 2458 may be part of an outsole, part of a midsole, part of an insole, part of a strobel, a plate or sheet of material incorporated / built into the sole, laminated between any of these sole layers, or any combination thereof. In particular, the base 2458 may include a rigid portion or section to which the collar elevator 2450 is secured.

[0171] 25A-26C illustrate various examples of connecting a base and a collar elevator in an adjustable orientation according to embodiments herein. The adjustable orientation allows a common base, such as a sole and / or a common collar elevator, to be used in connection with various styles of footwear, various sizes of footwear, and various bias characteristics between the upright and lowered positions of the footwear. It is further contemplated that the common base may accommodate different collar elevators by being connected in an adjustable orientation. Similarly, it is contemplated that the common collar elevator may be coupled with different bases by being connected in an adjustable orientation.

[0172] FIG. 25A illustrates an article of footwear 2510 having an upper 2514, a sole 2512, and a variable connection 2559. The sole 2512 serves as the base in this example. Two different collar elevator configurations are shown. A first collar elevator 2550A is shown extending from a multi-faceted opening 2503, as best seen in the exploded view of FIG. 25B. Continuing to refer to FIG. 25B, the multi-faceted opening 2503 includes many separate facets that are effective to engage with a corresponding faceted structure 2501 at the proximal end 2502 of the collar elevator 2550A. In this example, there is structure (e.g., an inverted structural shape) associated with both the multi-faceted opening 2503 and the faceted structure 2501, which allows for a variable orientation engagement between the two elements. For example, returning to FIG. 25A , a first collar elevator 2550A may be oriented at an angle 2505 relative to a horizontal reference 2517, and an alternate collar elevator 2550B may be oriented at an angle 2507 relative to the horizontal reference 2517. Because both collar elevators 2550A and 2550B have different lengths, but are shown in relation to a common sole 2512 and a common upper 2514, they are oriented at different angles into the multi-faceted opening to provide a proper fit with the upper 2514. By selecting one of the two collar elevators, a desired bias force, angle, style, etc. may be achieved.

[0173] 25B shows a female-male configuration, with a male portion extending from the collar elevator, however, in one example, it is contemplated that the female-male configuration may be reversed, such that the male element extends from the base and the collar elevator provides a female connection point. It is also contemplated that the connection between the faceted structure 2501 and the faceted opening 2503 may be permanently bonded (e.g., adhesive, chemical bonding) or removably bonded (e.g., compression fit). In one example, the orientation between the faceted structure 2501 and the faceted opening 2503 may be adjusted by the wearer to achieve a variable fit and collar elevator functionality.

[0174] FIG. 25C illustrates another article of footwear 2513 having a different style upper 2515 than the upper 2514 of FIG. 25A while maintaining a common sole 2512, according to embodiments herein. FIG. 25C is effective in demonstrating how a common base (e.g., sole 2512) can be paired with different uppers, and how the variable orientation connection between the collar elevator and the base provides freedom in assembly. In other words, by utilizing the variable orientation connection between the common base and the collar elevator(s), the common base can be used for different upper configurations. This may reduce the need for inventors and tooling for the footwear manufacturer while still allowing the footwear to be equipped with a collar elevator.

[0175] 25C is also effective to demonstrate the flexibility of different collar elevator configurations for a common base. A first collar elevator 2550C forms an angle 2509 from a horizontal reference 2517. A second collar elevator 2550D forms a second angle 2511 from the horizontal reference 2517. Thus, variable configurations can be achieved with the variable orientation linkage.

[0176] 26A-C provide an alternative variable interlocking configuration. Specifically, instead of having corresponding male and female structures with relative shapes as shown in FIG. 25B, the variable interlocking configuration of FIGS. 26A-C provides male and female structures with non-complementary shapes. Specifically, as best seen in FIG. 26B, the male structure 2601 has a straight cross section and the multi-faceted opening 2603 has a non-straight cross section (e.g., star-shaped, internal sprocket-shaped). Such non-complementary shapes, in one example, allow the collar elevator to have an interaction surface of the male component (e.g., the main surface of a straight male protrusion) without enlarging the proximal end of the collar elevator to accommodate a symmetrical male protrusion with sufficient interaction surface.

[0177] 26A and 26B provide another article of footwear 2610 having an upper 2614, a sole 2612, and a variable linkage 2659. Article of footwear 2610 shows alternative collar elevators, a first collar elevator 2650A, and a second collar elevator 2650B, to highlight the design, tooling, and inventory flexibility provided by the variable linkage. First collar elevator 2650A forms an angle 2605 from a horizontal reference 2617, and second collar elevator 2650B forms a second angle 2607 from the horizontal reference 2617.

[0178] 26B provides an exploded perspective view of the article of footwear 2610. A male structure 2601 extends from a distal end 2602 of the collar elevator 2650A. It is shown as a structure having a straight cross-section, although any cross-sectional shape is contemplated. A multi-faceted opening 2603 is also shown as having many facets adapted to receive and secure the male structure 2601 at various angles.

[0179] FIG. 26C illustrates another article of footwear 2613 having a different style upper 2615 than the upper 2614 of FIG. 26A while maintaining a common sole 2612, according to embodiments herein. FIG. 26C is effective in demonstrating how a common base (e.g., sole 2612) can be paired with different uppers, and how the variable orientation connection between the collar elevator and the base provides freedom in assembly. In other words, by utilizing the variable orientation connection between the common base and the collar elevator(s), the common base can be used for different upper configurations. This may reduce the need for inventors and tooling for the footwear manufacturer while still allowing the footwear to be equipped with a collar elevator.

[0180] 26C is also effective to demonstrate the flexibility of different collar elevator configurations for a common base. A first collar elevator 2650C forms an angle 2609 from a horizontal reference 2617. A second collar elevator 2650D forms a second angle 2611 from the horizontal reference 2617. Thus, variable configurations can be achieved with the variable orientation linkage.

[0181] 27A-28C show variations of a sliding collar elevator according to embodiments herein. FIGS. 27-27C show a first example of a sliding collar elevator 2750 having a protrusion 2705 at a proximal end 2702. The protrusion 2705 extends into a slot 2701 that accommodates a biasing element / material. The slot 2701 is formed in a base, such as a sole 2712. The slot 2701 provides a channel in which the protrusion 2705 is slidably secured. The motion path is restricted based on the shape of the slot 2701. As shown, the motion path is linear, but it is contemplated that other motion paths can be utilized to achieve various collar elevator actions. The slot has a first end in a toe direction and a second end in a heel direction. Thus, in one example, when the ankle collar is in the upright position, the proximal end of the first lever arm is more proximal to the second end of the slot (e.g., the heelward end of the slot), and when the ankle collar is in the down position, the proximal end of the first lever arm is distal to the second end of the slot (e.g., closer to the toeward end of the slot).

[0182] The collar elevator 2750 is considered to be secured to the upper 2714 in any manner provided herein. Thus, when a force is applied to the ankle collar 2736 to don the article of footwear, the force is diverted from the ankle collar 2736, which causes the upper 2714 to drop (e.g., crush) to open the footwear for foot insertion. The force is further diverted through the collar elevator 2750 and converted to motion directed by the slot 2701. The projection 2705 slides and pivots within the slot 2701 as the collar elevator transmits a force load during the donning motion. The slot 2701 includes a biasing mechanism, such as a spring 2703. Although the spring 2703 is shown as a spring that resists compressive forces to bias the collar elevator 2750 to an upright position, it is considered that a spring resisting tension may be used on the opposite side of the projection 2705 within the slot 2701 to achieve a similar response. The spring 2703 can be adjusted to provide different levels of bias force, and the size of the slot 2701 can be adjusted to change the length and course of the motion path to tune the response of the collar elevator.

[0183] Figure 27B shows an exploded perspective view from Figure 27A. Figure 27C shows the article of footwear of Figure 27A in a lowered state. Specifically, collar elevator 2750 pushes projection 2705 forward within slot 2701, compressing spring 2703. Compression of spring 2703 exerts a restoring force on projection 2705, biasing collar elevator 2750 to an upright state.

[0184] 28-28C show a second example of a sliding collar elevator 2850 having a protrusion 2805 at a proximal end 2802. The protrusion 2805 extends into a slot 2801 that houses a biasing element. The slot 2801 is formed in a base, such as a sole 2812. The slot 2801 provides a channel in which the protrusion 2805 is slidably secured. The motion path is restricted based on the shape of the slot 2801. As shown, the motion path is linear, however, it is contemplated that other motion paths can be utilized to achieve various collar elevator actions.

[0185] The collar elevator 2850 is considered to be secured to the upper 2814 in any manner provided herein. Thus, when a force is applied to the ankle collar 2836 to don the footwear article, the force is diverted from the ankle collar 2836, which causes the upper 2814 to descend (e.g., crush) to open the footwear for foot insertion. The force is further diverted through the collar elevator 2850 and converted to motion directed by the slot 2801. The projection 2805 slides and pivots within the slot 2801 as the collar elevator transmits the force load during the donning motion. The slot 2801 includes a biasing mechanism, such as a resilient material 2803. A resilient material is a compressible material that returns to a less compressed state. Examples of resilient materials include, but are not limited to, polymeric compositions, such as foam compositions. Examples also include materials referenced in connection with sole materials, such as EVA.

[0186] In certain embodiments, it is contemplated that the slots 2801 are formed from a framework inserted into a mold tool for the sole 2812. The framework allows the inclusion of the sole-forming material in the slots during the sole-forming operation. The framework then provides a barrier between the sole material and the elastic material in the slots, so that the elastic material in the slots is independently movable relative to the material forming the sole. In other words, it is contemplated that during the formation of the sole, the slots may also be filled with the same elastic material as the sole-forming material. The framework also provides a track to guide the repeated movement of the projections biased by the elastic material.

[0187] Figure 28B shows an exploded perspective view from Figure 28A. Figure 28C shows the article of footwear of Figure 28A in a lowered state. Specifically, collar elevator 2850 pushes projection 2805 forward within slot 2801, compressing elastic material 2803. Compression of elastic material 2803 exerts a restoring force on projection 2805, biasing collar elevator 2850 to an upright state.

[0188] 27A-28C and related disclosures are contemplated for use in connection with the various embodiments provided herein. For example, different collar elevators having various sizes and shapes may be used in connection with the slide concept.

[0189] 29A-32C provide variations in lever arm configurations according to embodiments of the present disclosure, and it is contemplated that any lever arm variation may be used, particularly in connection with the various embodiments contemplated throughout this disclosure.

[0190] FIG. 29A illustrates another article of footwear 2910 having a variable cross-section collar elevator 2950 extending from a base 2958 according to one embodiment of the disclosure. As illustrated in FIGS. 29B and 29C along each cut line in FIG. 29A, the collar elevator has a transitional geometry having a first orientation at a first location and then transitioning to a second orientation at a second location. For example, the cross-section in FIG. 29B is near the proximal end of the collar elevator 2950 and has an elliptical cross-section with its major axis aligned with the longitudinal axis of the article of footwear 2910. As the collar elevator extends superiorly away from the base 2958, the cross-section transitions to that shown in FIG. 29C (which is still an eye-shaped cross-section), but the major axis does not point from the medial to the lateral direction of the article of footwear 2910.

[0191] Because some forces applied to the ankle collar, such as when a wearer compresses the ankle collar with their foot to don the footwear, are directional in nature, variable orientation of the cross-sectional shape may be effective to manipulate where along the length of the collar elevator deformation may occur and how deformation occurs. For example, the collar elevator 2950 may be prone to deformation along the minor axis of the cross section (i.e., perpendicular to the major axis). In this example, the application of force to the collar elevator 2950 during the donning motion may cause the collar elevator to deflect outward (e.g., away from the interior of the footwear) at cross section 29B and the collar elevator may deflect toward the longitudinal axis of the footwear at cross section 29C. Such variable deformation direction may allow expansion of the ankle collar in a medial-to-lateral direction based on deformation at cross section 29B and expansion in a toe-to-heel direction based on deformation at cross section 29C. Thus, the variable cross section may be effective to manipulate deformations that are useful in the use of the collar elevator, in one example.

[0192] FIG. 30A illustrates another article of footwear 3010 having another variable cross-section collar elevator 3050 according to one embodiment of the disclosure. In this example, the angled cross-section allows for variable deformation along the length of the collar elevator 3050 as it extends away from the base 3058. As seen in FIG. 30B, a first cross-section is provided that has a larger surface area than the cross-section shown in FIG. 30C. Cross-section 30B is closer to the base 3058 than cross-section 30C. Thus, the collar elevator 3050 tapers as it extends away from the base. This variable cross-section manipulates the deformation such that initial deformation occurs higher (e.g., closer to the distal end of the collar elevator) and as further deformation occurs, such as with the application of additional force, such as by inserting the foot into the footwear, deformation (e.g., flexion) occurs closer to the base 3058, in one example. Although straight cross sections are shown in Figures 30A-30C, it is contemplated that angled cross sections may be formed from any cross-sectional shape.

[0193] FIG. 31A illustrates another article of footwear 3110 having an upper 3114, a sole 31112, and a variable slit collar elevator 3150 extending from a base 3158 according to one embodiment of the disclosure. A number of slits are shown extending into the collar elevator 3150. The slits provide engineered fatigue points where deformation is likely to occur. In this example, the slits are located on the toe-end facing surface to promote heel-end directional deformation to aid in the transition from upright to down position. Also, in FIG. 31B, an enlarged side perspective view of the collar elevator 3150 of FIG. 31A, the slanting of the slits is noted. It can be seen that there is a higher concentration of slits per length at the distal end compared to the proximal end. Such slanting encourages deformation to occur initially at the distal end, and as additional force is applied, deformation migrates toward the proximal end. The slits also encourage deformation in a specific direction. For example, to promote longitudinal deformation rather than inside-out deformation, slits extending in the promoted direction may be utilized.

[0194] FIG 32A illustrates another article of footwear 3210 having an upper 3214, a sole 3212, and another variable cross-section collar elevator 3250 extending from a base 3258 according to one embodiment of the disclosure. The collar elevator 3250 has a variable cross-sectional shape along its length. In cross-section 32B, the collar elevator has an elliptical cross-sectional shape with its major axis in the longitudinal direction of the footwear, as shown in FIG 32B. Cross-section 32C, closer to the distal end of the collar elevator 3250, has a different cross-section that is circular, as seen in FIG 32C.

[0195] By having a variable cross-section, the location where the initial deformation occurs can be manipulated. Also, the variable cross-section can reduce the amount of material used in some cases and provide a comfortable fit. Although a transition from an oval to a circular cross-section is shown, it is understood that any combination of shapes in any order and any number can be utilized by the embodiments herein. Furthermore, a smooth transition between two or more cross-sectional shapes does not occur in all embodiments. Instead, when operating the collar elevator, an abrupt transition between two cross-sectional shapes can occur.

[0196] The singular forms "a", "an", "the", "at least one" and "one or more" may be used interchangeably to indicate the presence of at least one of an item. When these terms are used, there may be a plurality of such items unless the context clearly indicates otherwise. In this specification, all numerical values ​​of parameters (e.g., amounts or conditions) are understood to be modified in all cases by "about", regardless of whether the term "about" actually precedes the numerical value, unless otherwise expressly or clearly indicated in light of the context, including the appended claims. "About" indicates that the stated numerical value allows for some imprecision (some proximity to the precision of the value, approximately or reasonably close to the value, approximately). Unless the imprecision provided by "about" is otherwise understood in the art as such a general meaning, "about" as used herein indicates minimal variation that may occur in the ordinary manner of measuring and using such parameters. Also, the disclosure of a range is understood to specifically disclose all values ​​and subranges within that range. All references cited are incorporated herein in their entirety.

[0197] The terms "comprising," "including," and "having" are inclusive and thus specify the presence of a stated feature, step, operation, element, or component, but do not preclude the presence or addition of one or more other features, steps, operations, elements, or components. The sequence of steps, processes, and operations may be modified where possible, and additional or alternative steps may be employed. The term "or" as used herein includes any one and all combinations of the associated items listed. The term "any of" is understood to include any possible combination of the referenced items, including "any one of" the referenced items. The term "any of" is understood to include any possible combination of the referenced claims of the appended claims, including "any one of" the referenced claims.

[0198] For consistency and convenience, directional adjectives may be employed throughout this detailed description that correspond to the illustrated examples. Those skilled in the art will recognize that terms such as "top," "bottom," "upper," "lower," "top," "bottom," and the like may be used as descriptions of the drawings without expressing a limitation on the scope of the invention as defined by the claims.

[0199] The term "longitudinal" as used throughout this detailed description and in the claims refers to the direction in which a component extends in length. For example, the longitudinal direction of a shoe extends between the forefoot and heel regions of the shoe. The terms "forward" or "front" are used to refer to the general direction from the heel region to the forefoot region, and the terms "rearward" or "rear" are used to refer to the opposite direction, i.e., from the forefoot region to the heel region. In some cases, components may be identified as longitudinal along a longitudinal axis as well as longitudinally along the axis, both front and rear. The longitudinal direction or longitudinal axis may be referred to as the anterior-posterior direction or anterior-posterior axis.

[0200] The term "lateral," as used throughout this detailed description and in the claims, refers to the direction extending across the width of a component. For example, the lateral direction of a shoe extends between the lateral and medial sides of the shoe. The lateral direction or lateral axis may also be referred to as the side-to-side direction or side-to-side axis, or the medial-lateral direction or medial-lateral axis.

[0201] The term "vertical", as used throughout this detailed description and in the claims, generally refers to a direction perpendicular to both the side-to-side and longitudinal directions. For example, the vertical direction may extend upward from the ground surface when the sole is placed flat on the ground surface. It will be understood that each of these directional adjectives may apply to individual components of the sole. The term "upper" or "upwardly" refers to a vertical direction toward the top of the component and may include the upper, fastening area, and / or throat of the upper. The term "lower" or "downwardly" refers to a vertical direction opposite to the upward direction toward the bottom of the component and may generally refer to the bottom of the sole structure of the footwear article.

[0202] The "interior" of a footwear product, such as a shoe, refers to the portion of the space that a wearer's foot occupies when the shoe is worn. The "inner" of a component refers to the side or surface of the component that is oriented (or will be oriented) toward the interior of the component or footwear product in an assembled footwear product. The "outer" or "exterior" of a component refers to the side or surface of the component that is oriented (or will be oriented) away from the interior of the shoe in an assembled shoe. In some cases, other components may be between the inner side of the component and the interior in the assembled footwear product. Similarly, other components may be between the outer side of the component and the space outside the assembled footwear product. Additionally, the terms "inward" and "inwardly" refer to the direction toward the interior of the footwear product or component, such as a shoe, and the terms "outward" and "outwardly" refer to the direction toward the exterior of the footwear product or component, such as a shoe. Additionally, the term "proximal" refers to a direction closer to the center of the footwear component or closer toward the foot when the foot is inserted into the footwear product by a user wearing the footwear product. Similarly, the term "distal" refers to a relative location that is further away from the center of a footwear component, or a direction that is farther away from the foot when the foot is inserted into the article of footwear by a user wearing the article of footwear. Thus, it will be understood that the terms proximal and distal are intended to provide general opposite terms to describe relative spatial locations.

[0203] The following clauses represent aspects contemplated herein. The list is merely specific examples and does not limit the scope of the present specification. Instead, the following clauses are intended to provide guidelines regarding some of the aspects contemplated herein. The phrase "footwear article according to clause x-y" as used below should be interpreted as any one or combination of footwear articles x-y, where x and y are numeric clauses.

[0204] Clause 1. An article of footwear comprising: an upper having an ankle collar coupled to a sole and movable between a lowered state positioned closer to the sole and an upright state positioned farther from the sole; and a collar elevator operable to return the ankle collar from the lowered state to the upright state, the collar elevator being comprised of a first lever arm having a proximal end and a distal end and a second lever arm having a proximal end and a distal end, the distal end of the first lever arm and the distal end of the second lever arm being non-adjacent.

[0205] Clause 2. The article of footwear described in clause 1, wherein the proximal end of the first lever arm is continuous with the base.

[0206] Clause 3. The article of footwear of clause 2, wherein the base is layered beneath the insole and above the midsole.

[0207] Clause 4. The article of footwear of clause 2, wherein the base extends to a proximal end of the second lever arm.

[0208] Clause 5. The article of footwear of clause 2, wherein the base is a U-shaped element extending around the heel end of the sole between the proximal end of the first lever and the distal end of the second level.

[0209] Clause 6. The article of footwear described in clauses 1-5, wherein the proximal end of the first lever arm is separate from and coupled to the base.

[0210] Clause 7. The article of footwear of clause 6, wherein the base is layered beneath the insole and above the midsole.

[0211] Clause 8. The article of footwear of clause 6, wherein the base extends to a proximal end of the second lever arm.

[0212] Clause 9. The article of footwear of clause 6, wherein the base is a U-shaped element extending around the heel end of the sole between the proximal end of the first lever and the distal end of the second level.

[0213] Clause 10. The article of footwear of clause 6, wherein the first lever arm and the base are releasably coupled or permanently coupled.

[0214] Clause 11. The article of footwear described in clauses 1-10, wherein the first lever arm extends in a heel-direction from a proximal end to a distal end.

[0215] Clause 12. An article of footwear comprising: an upper having an ankle collar coupled to a sole and movable between a lowered state positioned closer to the sole and an upright state positioned farther from the sole; a collar elevator operable to return the ankle collar from the lowered state to the upright state, the collar elevator being comprised of a first lever arm having a proximal end and a distal end, the distal end of the first lever arm being independently movable relative to the sole; and a heel pull at a heel end of the upper.

[0216] Clause 13. The article of footwear described in clause 12, wherein the collar elevator further comprises a second lever arm having a proximal end and a distal end, the distal end of the first lever arm and the distal end of the second lever arm being non-adjacent, and at least one of the distal end of the first lever arm and the distal end of the second arm overlapping a portion of the heel pull.

[0217] Clause 14. The article of footwear described in clause 12, wherein the collar elevator further comprises a second lever arm having a proximal end and a distal end, wherein the distal end of the first lever arm and the distal end of the second lever arm are not adjacent and neither the distal end of the first lever arm nor the distal end of the second arm overlaps with the heel pull, such that a first distance between the distal end of the first lever arm and the distal end of the second arm is greater than a width of the heel pull from the first direction to the second direction.

[0218] Clause 15. An article of footwear according to clauses 12-14, wherein the heel pull is monolithic with the upper.

[0219] Clause 16. An article of footwear according to clauses 12-14, wherein the heel pull is separate from the upper and is joined to the upper.

[0220] Clause 17. The article of footwear according to clauses 12-14, wherein the heel pull extends in the heel direction to a greater extent than the upper, which also extends in the heel direction.

[0221] Clause 18. Footwear as described in clauses 12-17, wherein at least one material is positioned between the heel loop and the first lever arm.

[0222] Clause 19. The article of footwear of clauses 12-18, wherein at a distal end, the first lever arm is below an uppermost junction of the heel pull and the upper.

[0223] Clause 20. An article of footwear according to clauses 12-19, wherein the heel pull is coupled to the upper on an exterior surface of the upper.

[0224] Clause 21. A footwear article as described in clauses 12-20, wherein the first lever arm extends from one of the medial or lateral sides of the footwear article to the other of the medial or lateral sides of the footwear article.

[0225] Clause 22. An article of footwear comprising: an upper including an ankle collar coupled to a sole and movable between a lowered state positioned closer to the sole and an upright state positioned farther from the sole; a collar slide having a proximal end and a distal end, the proximal end of the collar slide extending from the ankle collar at a top heel end of the ankle collar; and a collar elevator operable to return the ankle collar from the lowered state to the upright state, the collar elevator being comprised of a first lever arm having a proximal end and a distal end, the distal end of the first lever arm being independently movable relative to the sole, the first lever arm extending from the sole toward the ankle collar at a first angle in the upright position, the first angle being greater than a second angle defined by the collar slide relative to the sole also in the upright position.

[0226] Clause 23. The article of footwear described in clause 22, wherein the collar elevator further comprises a second lever arm having a proximal end and a distal end, the distal end of the first lever arm and the distal end of the second lever arm being non-adjacent, and at least one of the distal end of the first lever arm and the distal end of the second arm overlapping at least a portion of a width including the collar slide.

[0227] Clause 24. The article of footwear described in clause 22, wherein the collar elevator further comprises a second lever arm having a proximal end and a distal end, wherein the distal end of the first lever arm and the distal end of the second lever arm are not adjacent and neither the distal end of the first lever arm nor the distal end of the second arm overlap a width including the collar slide, such that a first distance between the distal end of the first lever arm and the distal end of the second arm is greater than the width of the collar slide.

[0228] Clause 25. The article of footwear according to clauses 22-24, wherein the collar slide is monolithic with the upper.

[0229] Clause 26. An article of footwear according to clauses 22-24, wherein the collar slide is separate from the upper and is joined to the upper.

[0230] Clause 27. The article of footwear according to clauses 22-24, wherein the collar slide extends in a heel-direction greater than the upper extends in a heel-direction.

[0231] Clause 28. Footwear as described in clauses 22-27, wherein at least one material is positioned between the collar slide and the first lever arm.

[0232] Clause 29. An article of footwear as described in clauses 22-28, wherein the first lever arm at a distal end is below a proximal end of the collar slide.

[0233] Clause 30. Footwear as described in clauses 22-29, wherein the first lever arm extends from one of the medial or lateral sides of the footwear to the other of the medial or lateral sides of the footwear.

[0234] Clause 31. An article of footwear comprising: an upper with an ankle collar coupled to a sole and movable between a lowered state positioned closer to the sole and an upright state positioned farther from the sole; a collar stay having a first end on an inner side of the upper and a second end on an outer side of the upper, the collar stay extending around a heel end of the upper at the ankle collar; and a collar elevator operable to return the ankle collar from the lowered state to the upright state, the collar elevator being comprised of a first lever arm having a proximal end and a distal end and a second lever arm having a proximal end and a distal end, the distal end of the first lever arm and the distal end of the second lever arm being non-adjacent.

[0235] Clause 32. The article of footwear of clause 31, wherein at least one of the distal end of the first lever arm and the distal end of the second arm overlaps at least a portion of a width including the collar stay.

[0236] Clause 33. The article of footwear described in clause 31, wherein neither the distal end of the first lever arm nor the distal end of the second arm overlaps a width including the collar stay, and thus a first distance between the distal end of the first lever arm and the distal end of the second arm is greater than the width of the collar stay.

[0237] Clause 34. The article of footwear according to clauses 31-33, wherein the collar stay is a polymeric composition having a stiffness greater than the stiffness of the adjacent materials forming the upper.

[0238] Clause 35. An article of footwear according to clauses 31 to 34, wherein the collar stay is separate from the upper and is joined to the upper.

[0239] Clause 36. Footwear according to clauses 31-34, wherein the collar stay is attached to the outer layer of the upper or between the outer layer of the upper and the inner lining of the footwear.

[0240] Clause 37. Footwear as described in clauses 31-36, wherein at least one material is positioned between the collar stay and the first lever arm.

[0241] Clause 38. An article of footwear as described in clauses 31 to 37, wherein the first lever arm at its distal end is located below the collar stay in the upright position.

[0242] Clause 39. An article of footwear comprising: an upper having an ankle collar coupled to a sole and movable between an open position and a closed position; and a collar elevator operable to return the ankle collar from a lowered position to an upright position, the collar elevator being comprised of a first lever arm having a proximal end and a distal end, at least a portion of the first lever arm having a corrugation between the proximal end and the distal end.

[0243] Clause 40. The article of footwear described in clause 39, wherein the collar elevator further comprises a second lever arm having a proximal end and a distal end, and a corrugation between the proximal end and the distal end, wherein the distal end of the first lever arm and the distal end of the second lever arm are not adjacent.

[0244] Clause 41. The article of footwear according to clauses 39 and 40, wherein the first lever arm extends from the sole towards the ankle collar at the heel end of the sole.

[0245] Article 42. An article of footwear as described in articles 39 and 40, wherein the first lever arm extends from the sole in a heel direction toward the ankle collar.

[0246] Clause 43. The article of footwear described in clause 39, wherein the collar elevator further comprises a second lever arm having a proximal end and a distal end, and a corrugation between the proximal end and the distal end, and wherein the distal end of the first lever arm and the distal end of the second lever arm are continuous.

[0247] Clause 44. An article of footwear comprising: an upper having an ankle collar coupled to a sole and movable between an open position and a closed position; and a collar elevator operable to return the ankle collar from a lowered position to an upright position, the collar elevator comprising: a first lever arm having a proximal end at the sole and a distal end toward the ankle collar, a first resilient member extending from the first lever arm in a toe direction toward the sole on an inner side, and a second resilient member extending from the first lever arm in a toe direction toward the sole on an outer side.

[0248] Clause 45. The article of footwear described in clause 44, wherein the first elastic member has a first length between the first lever arm and the sole in the closed state, and the first elastic member has a second length between the first lever arm and the sole in the open state, the second length being greater than the first length.

[0249] Clause 46. The article of footwear described in clause 45, wherein the second elastic member has a first length between the first lever arm and the sole in the closed state, and the second elastic member has a second length between the first lever arm and the sole in the open state, the second length being greater than the first length.

[0250] Clause 47. The article of footwear of any one of clauses 44-46, wherein the first elastic member has a lower Young's modulus than the first lever arm.

[0251] Clause 48. An article of footwear as described in clauses 44-47, wherein the first lever arm is articulated in a vertical to rearward direction at the sole when transitioning from the closed state position to the open state position.

[0252] Clause 49. An article of footwear comprising: an upper coupled to a sole and having an ankle collar movable between a lowered state positioned closer to the sole and an upright state positioned farther from the sole, the sole being configured with a multi-faceted opening; and a collar elevator operable to return the ankle collar from the lowered state to the upright state, the collar elevator configured with a first lever arm having a proximal end and a distal end, the proximal end of the first lever arm being positioned within the multi-faceted opening in a first orientation providing a first angle between the first lever arm and the sole or a second orientation providing a second angle between the first lever arm and the sole.

[0253] Clause 50. The article of footwear described in clause 49, wherein the proximal end of the first lever arm is configured with a male shape having a complementary shape to the multi-faceted opening.

[0254] Clause 51. The article of footwear described in clause 49, wherein the proximal end of the first lever arm is configured with a male mold having a shape that is non-complementary to the multi-faceted opening.

[0255] Clause 52. The article of footwear described in clauses 49-51, wherein the collar elevator further comprises a second lever arm having a proximal end and a distal end, the proximal end of the second lever arm being positioned within a second multi-faceted opening in the sole in a first orientation providing a first angle between the first lever arm and the sole or a second orientation providing a second angle between the first lever arm and the sole.

[0256] Clause 53. The article of footwear described in clause 52, wherein the first angle of the first lever arm and the first angle of the second lever arm are a common angle, and the second angle of the first lever arm and the second angle of the second lever arm are a common angle.

[0257] Clause 54. The article of footwear described in clause 52, wherein the proximal end of the second lever arm is configured with a male mold having a shape that is non-complementary to the multi-faceted opening.

[0258] Clause 55. An article of footwear comprising: an upper with an ankle collar coupled to a sole and movable between a lowered state positioned closer to the sole and an upright state positioned farther from the sole, the sole configured with a slot on a first side; and a collar elevator operable to return the ankle collar from the lowered state to the upright state, the collar elevator configured with a first lever arm having a proximal end and a distal end, the first lever arm extending away from the first lever arm toward the sole and including a protrusion that engages the sole at the slot, the resilient material being in the slot on the first side of the protrusion.

[0259] Clause 56. An article of footwear according to clause 55, wherein the elastic material is a spring.

[0260] Clause 57. An article of footwear according to clause 56, wherein the spring is a compression spring.

[0261] Clause 58. The article of footwear according to clause 55, wherein the elastic material is a polymer composition.

[0262] Clause 59. The article of footwear according to clause 58, wherein the polymer composition is a foamed polymer composition.

[0263] Clause 60. The article of footwear according to clause 59, wherein the foamed polymer composition is ethylene vinyl acetate.

[0264] Clause 61. The article of footwear according to clause 55, wherein the elastic material is a polymeric material and the sole also comprises a polymeric material.

[0265] Clause 62. The article of footwear according to clause 55, wherein the sole is configured with a second slot on a second side, the first side being an inner sidewall of the sole and the second side being an outer sidewall of the sole.

[0266] Clause 63. The article of footwear described in clause 62, wherein the collar elevator is further comprised of a second lever arm having a proximal end and a distal end, the second lever arm including a protrusion extending toward the sole and engaging the sole at a second slot, and the elastic material is in the second slot on a first side of the protrusion.

[0267] Clause 64. The article of footwear of clause 63, wherein the first side of the protrusion in the second slot is a toe end side of the slot.

[0268] Clause 65. An article of footwear comprising: an upper including an ankle collar coupled to a sole and movable between a lowered state positioned closer to the sole and an upright state positioned farther from the sole, the sole including a slot having a first end and a second end and a resilient material in the slot between the first end and the second end; and a collar elevator operable to return the ankle collar from the lowered state to the upright state, the collar elevator including a first lever arm having a proximal end and a distal end, the proximal end of the first lever arm being proximal to the second end of the slot when the ankle collar is in the upright state and the proximal end of the first lever arm being distal from the second end of the slot when the ankle collar is in the lowered state.

[0269] Clause 66. The article of footwear according to clause 65, wherein the elastic material is a spring.

[0270] Clause 67. An article of footwear according to clause 66, wherein the spring is a compression spring.

[0271] Clause 68. The article of footwear according to clause 65, wherein the elastic material is a polymer composition.

[0272] Clause 69. The article of footwear according to clause 68, wherein the polymer composition is a foamed polymer composition.

[0273] Clause 70. The article of footwear according to clause 69, wherein the foamed polymer composition is ethylene vinyl acetate.

[0274] Clause 71. The article of footwear according to clause 65, wherein the elastic material is a polymeric material and the sole also comprises a polymeric material.

[0275] Clause 72. The article of footwear of clauses 65-71, wherein the sole is configured with a second slot on a second side, the slot being on an inner sidewall of the sole and the second slot being on an outer sidewall of the sole.

[0276] Clause 73. The article of footwear described in clause 72, wherein the collar elevator is further comprised of a second lever arm having a proximal end and a distal end, the proximal end of the second lever arm being proximal to the second end of the second slot when the ankle collar is in the upright position and the proximal end of the first lever arm being distal from the second end of the second slot when the ankle collar is in the lowered position.

[0277] Clause 74. An article of footwear as described in clauses 65-73, wherein the elastic material is disposed between the proximal end of the first lever and the first end of the slot.

[0278] Clause 75. The article of footwear according to clause 74, wherein the resilient material is not present between the proximal end of the first lever and the second end of the slot.

[0279] Clause 76. The article of footwear according to clause 74, wherein the elastic material is under a first compression when the ankle collar is in the upright position, and the elastic material is under a second compression, greater than the first compression, when the ankle collar is in the down position.

[0280] Clause 77. The article of footwear of clauses 65-76, wherein the first lever arm is configured with a protrusion that extends into the slot and engages the resilient material in the slot.

[0281] From the foregoing, it will be seen that this invention is well adapted to attain all the ends and objectives set forth above, together with other advantages which are inherent in the construction and which can be realized by those skilled in the art.

[0282] It will be understood that certain features and subcombinations are practical and may be employed without reference to other features and subcombinations, which are contemplated by and within the scope of the claims.

[0283] Since many possible embodiments can be made of the present invention without departing from the scope of the present invention, it is to be understood that all matters set forth in this specification or shown in the accompanying drawings are to be interpreted as illustrative and not in a limiting sense.

Claims

1. A footwear article, comprising: an upper coupled to the sole and including an ankle collar movable between a lowered state positioned closer to the sole and an upright state positioned farther from the sole; a collar elevator operable to return the ankle collar from the lowered position to the upright position; The collar elevator is a first lever arm having a proximal end and a distal end; and a second lever arm having a proximal end and a distal end; the distal end of the first lever arm and the distal end of the second lever arm are non-adjacent, bifurcated collar elevators; Footwear products.

2. The article of footwear of claim 1 , wherein a proximal end of the first lever arm is contiguous with a base.

3. The article of footwear of claim 2 , wherein the base is positioned beneath an insole and above a midsole.

4. The article of footwear of claim 2 , wherein the base extends to a proximal end of the second lever arm.

5. 3. The article of footwear of claim 2, wherein the base is a U-shaped element extending around a heel end of the sole between a proximal end of the first lever arm and a proximal end of the second lever arm.

6. The article of footwear of claim 1 , wherein a proximal end of the first lever arm is separate from and coupled to a base.

7. The article of footwear of claim 6 , wherein the base is positioned beneath an insole and above a midsole.

8. The article of footwear of claim 6 , wherein the base extends to a proximal end of the second lever arm.

9. 7. The article of footwear of claim 6, wherein the base is a U-shaped element extending around a heel end of the sole between a proximal end of the first lever arm and a proximal end of the second lever arm.

10. The article of footwear of claim 6 , wherein the first lever arm and the base are releasably coupled or permanently coupled.

11. The article of footwear of claim 1 , wherein the first lever arm extends in a heel direction from the proximal end to the distal end.

12. The article of footwear of claim 1 , further comprising a heel pull at a heel end of the upper.

13. 2. The article of footwear of claim 1, further comprising a collar slide having a proximal end and a distal end, the proximal end of the collar slide extending from the ankle collar at a top heel end of the ankle collar, the first lever arm extending from the sole toward the ankle collar at a first angle in an upright position, the first angle being greater than a second angle defined by the collar slide relative to the sole also in the upright position.

14. 10. The article of footwear of claim 1, further comprising a collar stay having a first end on a medial side of the upper and a second end on a lateral side of the upper, the collar stay extending around a heel end of the upper at the ankle collar.

15. The article of footwear of claim 1 , wherein the sole includes a slot that receives a resilient member, and a proximal end of the first lever arm includes a projection that extends into the slot.

16. 2. The article of footwear of claim 1, further comprising a multi-faceted opening in the sole, wherein a proximal end of the first lever arm is positioned within the multi-faceted opening in a first orientation that provides a first angle between the first lever arm and the sole or a second orientation that provides a second angle between the first lever arm and the sole.

17. A footwear article, comprising: an upper including an ankle collar coupled to the sole and movable between a lowered state positioned closer to the sole and an upright state positioned further from the sole; a collar elevator operable to return said ankle collar from said lowered position to said upright position; a first lever arm having a proximal end and a distal end; and a second lever arm having a proximal end and a distal end; the distal end of the first lever arm and the distal end of the second lever arm are non-adjacent, bifurcated collar elevators; The distal end of the first lever arm is independently movable relative to the sole. Collar elevator, A heel pull at a heel end of the upper; A footwear product comprising:

18. A footwear article, comprising: an upper including an ankle collar coupled to the sole and movable between a lowered state positioned closer to the sole and an upright state positioned further from the sole; a collar slide having a proximal end and a distal end, the proximal end of the collar slide extending from the ankle collar at a top heel end of the ankle collar; a collar elevator operable to return the ankle collar from the lowered position to the upright position; The collar elevator is a first lever arm having a proximal end and a distal end, and a second lever arm having a proximal end and a distal end; the distal end of the first lever arm and the distal end of the second lever arm are non-adjacent, bifurcated collar elevators; a distal end of the first lever arm is independently movable relative to the sole; the first lever arm extends at a first angle from the sole toward the ankle collar in the upright position; the first angle being a collar elevator that is also greater than a second angle defined by the collar slide relative to the sole in the upright position; Footwear products.

Images