Patent Description:
Sole structures generally include a layered arrangement extending between a ground surface and the upper. One layer of the sole structure includes an outsole that provides abrasion-resistance and traction with the ground surface. The outsole may be formed using materials and geometries that impart durability and wear-resistance, as well as enhance traction with the ground surface. Another layer of the sole structure includes a midsole disposed between the outsole and the upper. The midsole provides cushioning for the foot and may be partially formed from a polymer foam material that compresses resiliently under an applied load to cushion the foot by attenuating ground-reaction forces. The midsole may additionally or alternatively incorporate a fluid-filled bladder to increase durability of the sole structure, as well as to provide cushioning to the foot by compressing resiliently under an applied load to attenuate ground-reaction forces. Sole structures may also include a comfort-enhancing insole or a sockliner located within a void proximate to the bottom portion of the upper and a strobel attached to the upper and disposed between the midsole and the insole or sockliner. For example, <CIT> describes a shoe including an upper and a sole secured to the upper, wherein the sole includes transversely extending tread members and transversely extending grooves, the width of a tread member in a midfoot region is greater than the width of a tread member in a heel region and greater than the width of a tread member in a metatarsal region, and the width of a groove in a ball region is greater than a width of a groove in a toe region and greater than the width of a groove in the metatarsal region.

The claimed invention is defined by the appended set of claims. It will be apparent to those of ordinary skill in the art that specific details need not be employed, that example configurations may be embodied in many different forms.

The sole structure includes a main body formed of a first material and defining a first portion of a ground-engaging surface. The main body includes a first channel defined by a first segment extending along a first axis and a second segment extending along a second axis transverse to the first axis. The sole structure also includes at least one insert formed of a second material and received by the main body. The at least one insert defines a second portion of the ground-engaging surface that is flush with the first region of the ground-engaging surface and has a second channel including a third segment extending along a third axis parallel to the first axis and a fourth segment extending along a fourth axis transverse to the third axis and substantially parallel to the second axis. One of the first channel and the second channel defines an interface between the main body and the insert.

Implementations of the disclosure may include one or more of the following optional features. In some implementations, the at least one insert includes an anterior insert defining at least a portion of a forefoot region of the ground-engaging surface, and a posterior insert defining at least a portion of a heel region of the ground-engaging surface. Here, the anterior insert may include the second channel and the posterior insert may include a third channel having a fifth segment extending along a fifth axis substantially parallel to the first axis and a sixth segment extending along a sixth axis transverse to the fifth axis and substantially parallel to the second axis, the third channel defining an interface between the main body and the posterior insert. Additionally or alternatively, the main body may define at least a portion of a midfoot region of the sole structure and may separate the anterior insert from the posterior insert.

In some examples, the main body is formed of a foam material and the at least one insert is formed of a rubber material. The main body may define at least one side surface of the sole structure, a portion of the first channel of the main body extending onto the side surface. Here, the at least one side surface of the sole structure may include a lateral side surface having a first portion of the first channel formed therein and a medial side surface having a second portion of the second channel formed therein.

In some configurations, the main body includes a socket defined by a recessed surface offset from the ground-engaging surface and a sidewall extending between the ground-engaging surface and the recessed surface and intersecting the at least one side surface to define a notch. In this configuration, the insert is received by the socket, a first portion of a peripheral surface of the insert mating with the sidewall of the socket and a second portion of the peripheral surface of the insert being disposed in the notch and flush with the at least one side surface. In some examples, the first region of the ground-engaging surface is continuous and flush with the second region of the ground-engaging surface.

Another aspect of the disclosure provides a sole structure for an article of footwear. The sole structure includes a main body defining a first region of a ground-engaging surface and at least one side surface extending from the ground-engaging surface. The sole structure also includes at least one insert received by the main body, which defines a second region of the ground-engaging surface. The sole structure further includes a first channel defined by a first plurality of segments including a first segment extending from a first node to a second node along a first axis, a second segment extending from a third node to a fourth node along a second axis transverse to the first axis, and a third segment extending from a fifth node to a sixth node along a third axis transverse to the second axis and substantially parallel to the first axis.

Implementations of the disclosure may include one of more of the following optional features. In some implementations, the first segment is formed along a first side surface, the second segment is formed in the first region of the ground-engaging surface, and the third segment is formed along a second side surface.

In some examples, the sole structure includes a second channel defined by a second plurality of segments including a fourth segment extending from a seventh node to an eighth node along a fourth axis substantially parallel to the first axis and a fifth segment extending from a ninth node to a tenth node along a fifth axis substantially parallel to the second axis. Here, the first channel may be formed only in the main body of the sole structure and the second channel may be formed only in the insert of the sole structure. The insert may include an aperture through at least one of the nodes of the channel, such that the main body is exposed through the aperture. A first portion of the first channel may be formed in the main body and a second portion of the first channel is formed in the insert. At least one of the segments may include an intermediate node. Here, widths of each of the first channel and the second channel may be variable in a direction along at least one of the axes.

In some configurations, the second node and the third node define a first common node and the fourth node and the fifth node define a second common node, such that the first segment, the second segment, and the third segment are serially connected. Alternatively, the second node, the third node, and the fifth node may define a common node such that the second segment and the third segment define first and second sub-channels, respectively.

Referring to <FIG>, an article of footwear <NUM> includes an upper <NUM> and sole structure <NUM>. The article of footwear <NUM> may be divided into one or more regions. The regions may include a forefoot region <NUM>, a mid-foot region <NUM>, and a heel region <NUM>. The forefoot region <NUM> may be subdivided into a toe portion <NUM>T corresponding with phalanges and a ball region <NUM>B associated with metatarsal bones of a foot. The mid-foot region <NUM> may correspond with an arch area of the foot, and the heel region <NUM> may correspond with rear portions of the foot, including a calcaneus bone. The footwear <NUM> may further include an anterior end <NUM> associated with a forward-most point of the forefoot region <NUM>, and a posterior end <NUM> corresponding to a rearward-most point of the heel region <NUM>. A longitudinal axis AF of the footwear <NUM> extends along a length of the footwear <NUM> from the anterior end <NUM> to the posterior end <NUM>, and generally divides the footwear <NUM> into a lateral region <NUM> and a medial region <NUM>. Accordingly, the lateral region <NUM> and the medial region <NUM> respectively correspond with opposite sides of the footwear <NUM> and extend through the regions <NUM>, <NUM>, <NUM>. As shown in <FIG>, <FIG>, and <FIG>, the longitudinal axis AF of the footwear may be arcuate in shape, such that the longitudinal axis AF is substantially centrally located between the lateral side <NUM> and the medial side <NUM> along the length of the footwear <NUM>.

The upper <NUM> includes interior surfaces that define an interior void <NUM> configured to receive and secure a foot for support on sole structure <NUM>. The upper <NUM> may be formed from one or more materials that are stitched or adhesively bonded together to form the interior void <NUM>. Suitable materials of the upper may include, but are not limited to, mesh, textiles, foam, leather, and synthetic leather. The materials may be selected and located to impart properties of durability, air-permeability, wear-resistance, flexibility, and comfort.

In some examples, the upper <NUM> includes a strobel (not shown) having a bottom surface opposing the sole structure <NUM> and an opposing top surface defining a footbed <NUM> of the interior void <NUM>. Stitching or adhesives may secure the strobel to the upper <NUM>. The footbed <NUM> may be contoured to conform to a profile of the bottom surface (e.g., plantar) of the foot. Optionally, the upper <NUM> may also incorporate additional layers such as an insole <NUM> or sockliner that may be disposed upon the strobel and reside within the interior void <NUM> of the upper <NUM> to receive a plantar surface of the foot to enhance the comfort of the article of footwear <NUM>. An ankle opening <NUM> in the heel region <NUM> may provide access to the interior void <NUM>. For example, the ankle opening <NUM> may receive a foot to secure the foot within the void <NUM> and facilitate entry and removal of the foot from and to the interior void <NUM>.

In some examples, one or more fasteners (not shown) extend along the upper <NUM> to adjust a fit of the interior void <NUM> around the foot and to accommodate entry and removal of the foot therefrom. The upper <NUM> may include apertures <NUM> such as eyelets and/or other engagement features such as fabric or mesh loops that receive the fasteners. The fasteners may include laces, straps, cords, hook-and-loop, or any other suitable type of fastener. The upper <NUM> may include a tongue portion <NUM> that extends between the interior void <NUM> and the fasteners.

With reference to <FIG>, several alternative implementations of a sole structure <NUM> according to the instant disclosure are provided. In view of the substantial similarities in structure and function of the components associated with each of the implementations, like reference numerals are used hereinafter and in the drawings to identify common components having the same design. Like reference numerals containing letter extensions are used to identify variations of common components within an implementation of the sole structure <NUM>, while reference numerals containing prime symbols (') are used to identify examples of common components that have been modified between implementations and reference numerals containing subscripts are used to identify sub-components of a parent component. Accordingly, reference to components using numerals not including letter extensions, prime symbols, or subscripts is understood to collectively refer to all variations of a common component including like reference numerals, including those examples having letter extensions, prime symbols, and/or subscripts.

With reference to <FIG>, the sole structure <NUM>, <NUM>'-<NUM>‴ includes a ground-engaging surface <NUM>, <NUM>'-<NUM>‴ configured to interface with a ground surface when the article of footwear <NUM> is worn by a user. The sole structure <NUM> is further defined by an upper surface <NUM>, which is formed on an opposite side of the sole structure <NUM> from the ground-engaging surface <NUM> and is configured to oppose the upper, thereby providing a foot-support surface. A side surface <NUM>, <NUM>'-<NUM>‴ extends between the ground-engaging surface <NUM> and the upper surface <NUM>, and defines an outer periphery of the sole structure <NUM>. Although the illustrated sole structure <NUM> includes a substantially continuous, contoured side surface <NUM> extending around the entire periphery of the sole structure <NUM>, it may be defined as comprising a lateral side surface 206a, 206a'-206a‴ extending substantially along the lateral side <NUM> of the sole structure <NUM>, a medial side surface 206b, 206b'-206b‴ extending substantially along the medial side <NUM> of the sole structure <NUM>, an anterior side surface 206c, <NUM>'-<NUM>‴ extending around the forefoot region <NUM> between the lateral side surface 206a and the medial side surface 206b, and a posterior side surface 206d, 206d'-<NUM>‴ extending around the heel region <NUM> between the lateral side surface 206a and the medial side surface 206b. The anterior side surface 206c may be defined by a toe cap, or tab <NUM>, which protrudes from the upper surface <NUM> and is configured to attach or bond to the upper <NUM> at the anterior end <NUM>.

A transition <NUM> may be formed at the intersection of the ground-engaging surface <NUM> and the side surface <NUM>, and may be defined by a variable radius RT, RT1, RT2 extending around the periphery of the sole structure <NUM>. For example, in the forefoot region <NUM> and the heel region <NUM> the transition <NUM> may be defined by a first radius RT1 providing a relatively pronounced transition <NUM> between the ground-engaging surface <NUM> and the side surface <NUM>. Conversely, the transition <NUM> between the ground-engaging surface <NUM> and the side surface <NUM> in the mid-foot region <NUM> may be defined by a relatively large radius RT2, whereby the ground-engaging surface <NUM> and the side surface <NUM> are substantially continuously formed.

The sole structure <NUM> further includes a plurality of channels <NUM>, <NUM>'-<NUM>‴ formed therein. The channels <NUM> are defined by a recessed surface <NUM> offset from the ground-engaging surface <NUM> by a depth DC, and an opposing pair of sidewalls <NUM> extending from the ground-engaging surface <NUM> to the recessed surface <NUM>. A distance between the sidewalls <NUM> defines a width WC of the channels <NUM>, as shown in <FIG>, <FIG>, and <FIG>. As described in greater detail below, the depths DC and the widths WC of the channels <NUM> may be variable along lengths of the channels <NUM>.

Each of the channels <NUM> includes a plurality of elongate segments <NUM>. Each of the segments <NUM> includes two or more nodes <NUM> connected to each other by intermediate necked regions <NUM>, and extends from a first end node 224a to a second end node 224a along a longitudinal segment axis As, as shown in <FIG>. One or more of the segments <NUM> may further include intermediate nodes 224b disposed between the end nodes 224a along the segment axis AS, and interconnected to each other by the necked regions <NUM>. Accordingly, the end nodes 224a, the intermediate nodes 224b, and the necked regions <NUM> of a respective segment <NUM> are all aligned along a common segment axis AS. With reference to <FIG>, <FIG>, and <FIG>, the segment axes AS1-n of each of the segments <NUM> may be arranged at oblique angles with respect to the longitudinal axis AF of the footwear <NUM>.

As discussed above, the width WC of each of the channels <NUM> is variable along a length of the channels <NUM>. More specifically, the width WC is variable along each segment <NUM>, whereby a first width WC1 of the segment <NUM> at the nodes <NUM> is greater than a second width WC2 of the segment <NUM> at each of the necked regions <NUM>, as shown in <FIG>, <FIG>, and <FIG>. Alternatively, the sidewalls <NUM> may be described as having an undulated shape, whereby the sidewalls <NUM> of each segment <NUM> converge with each other through the necked regions <NUM> and diverge through the nodes <NUM>.

The segments <NUM> of each channel <NUM> are serially arranged at alternating oblique or right angles to each other. Accordingly the segment axes AS1-n of connected ones of the segments <NUM> are transverse to each other and define a waveform or chevron shape, as shown in <FIG>, <FIG>, and <FIG>. One or more of the channels <NUM> defines a single, continuous path, whereby the segments <NUM> are serially arranged in an end-to-end arrangement. For example, a first segment <NUM> extends from a first end node 224a to a second end node 224a along a first segment axis AS1, and a second segment <NUM> extends from the second end node 224a to a third end node 224a along a second segment axis AS2 at an oblique or right angle with respect to the first segment axis Asi. Further, a third segment <NUM> extends from the third end node 224a to a fourth end node 224a along a third segment axis AS3 at an oblique or right angle to the second segment axis AS2 and substantially parallel (e.g. within approximately <NUM> degrees) to the first segment axis AS1. In addition or alternative to serially-arranged channels <NUM>, the sole structure <NUM> may include branched channels <NUM>, whereby three or more sub-channels <NUM> diverge from a common end node 224a defining a junction <NUM>. In some examples, one or more channels <NUM> may include serpentine portions, wherein one or more segments <NUM> of a channel is disposed between two or more other segments of a channel <NUM>, as described below.

In some implementations, the sole structure <NUM> may be compositely formed of a main body <NUM>, <NUM>'-<NUM>‴ and one or more inserts <NUM>, <NUM>'-<NUM>‴, which cooperate to define the ground-engaging surface <NUM> of the sole structure <NUM>. As discussed in greater detail below, the main body <NUM> includes one or more sockets <NUM>, <NUM>'-<NUM>‴ each configured to receive a corresponding one of the inserts <NUM>, thereby allowing regions of the ground-engaging surface <NUM> and side surfaces <NUM> defined by the inserts <NUM> to be flush with regions of the ground-engaging surface <NUM> and side surfaces <NUM> defined by the main body <NUM>. Interfaces between the inserts <NUM> and the main body <NUM> may be defined by the channels <NUM>, such that an interface between an insert <NUM> and the main body <NUM> has a profile substantially similar to a profile of the one of the channels <NUM>. Additionally or alternatively, the main body <NUM> and the inserts <NUM> may cooperate to define the channels <NUM> of the sole structure <NUM>, whereby one or more of the channels <NUM> may extend substantially uninterrupted between the main body <NUM> and the one or more inserts <NUM>.

With reference to <FIG>, <FIG>, and <FIG>, each of the sockets <NUM> is defined by a recessed surface <NUM>, <NUM>'-<NUM>‴ (hidden) offset from the ground-engaging surface <NUM> of the main body by a depth DS. At least a portion of an outer periphery of each of the sockets <NUM> is defined by one or more sidewalls <NUM>, <NUM>'-<NUM>‴ extending between the recessed surface <NUM> and the ground-engaging surface <NUM>. The sidewall <NUM> of the socket <NUM> may intersect one or more of the side surfaces <NUM> of the sole structure <NUM>, thereby defining an opening (not shown) or notch through the side surface(s) <NUM>.

The inserts <NUM> are configured to be received within the sockets <NUM> of the main body <NUM>. Accordingly, the inserts <NUM> are defined by an inner surface <NUM>, <NUM>'-<NUM>‴ (hidden) opposing the ground-engaging surface <NUM> and a peripheral surface <NUM>, <NUM>'-<NUM>‴ extending between the inner surface <NUM> and the ground-engaging surface <NUM>. A distance between the ground-engaging surface <NUM> and the inner surface <NUM> defines a thickness TI of each of the inserts <NUM>, which is substantially similar to the depth DS of the corresponding socket <NUM>, such that the region of the ground-engaging surface <NUM> defined by the insert <NUM> is substantially aligned or coplanar with the regions of the ground-engaging surface <NUM> defined by the main body <NUM>.

A profile of the peripheral surface <NUM> of each insert <NUM> corresponds to a profile defined by the sidewalls <NUM> and opening of the corresponding socket <NUM>. Accordingly, the peripheral surface <NUM> of the insert <NUM> mates with the sidewall <NUM> of the socket <NUM> to provide a continuous and uninterrupted transition between the main body <NUM> and the insert <NUM> along the ground-engaging surface <NUM>. Further the portions of the peripheral surface <NUM> extending along the opening of the socket <NUM> are substantially flush with the corresponding side surfaces <NUM> defined by the main body <NUM> to provide a continuous and uninterrupted transition between the main body <NUM> and the insert <NUM> along the side surfaces <NUM>.

As shown, the main body <NUM> defines the upper surface <NUM> and the side surfaces <NUM> of the sole structure <NUM>, and further defines one or more regions of the ground-engaging surface <NUM>. Accordingly, the main body <NUM> is configured to provide the functions of both a traditional midsole as well as an outsole, and may be formed of a molded foam material providing a range of desirable properties, including durability, energy return, cushioning, traction, and support. Examples of suitable materials are disclosed in <CIT>, <CIT>, <CIT>, <CIT>, <CIT>, and <CIT>.

The inserts <NUM> are generally located in regions of the ground-engaging surface <NUM> that are more likely to be subjected to increased point loads relative to the regions of the ground-engaging surface <NUM> defined by the foam material of the main body <NUM>. Accordingly, the inserts <NUM> are formed of a material having a greater coefficient of friction, durability, and abrasion resistance than the material of the main body <NUM>.

As discussed above, the channels <NUM> of the sole structure <NUM> may extend continuously along the ground-engaging surface <NUM>. Accordingly, one or more of the channels <NUM> may traverse both the main body <NUM> and one or more of the inserts <NUM> in a substantially continuous, and uninterrupted manner. For example, a first one of the segments <NUM> may be formed in one of the inserts <NUM>, and may connect to a second one of the segments <NUM> formed in the main body <NUM>. Additionally or alternatively, a single one of the segments <NUM> may extend from the main body <NUM> to the insert <NUM>, or vice versa.

As shown in <FIG>, <FIG>, and <FIG>, the portions of the channels <NUM> defined by the main body <NUM> may be formed with "softer" edges than the portions of the channels <NUM> defined by the inserts. For example, the edges formed by the intersection of the recessed surface <NUM> and the sidewalls <NUM> of the channels <NUM> may have a greater radius in the main body <NUM> than in the inserts <NUM>. In some examples, the recessed surface <NUM> and the sidewalls <NUM> defining the channels <NUM> formed in the main body <NUM> may be substantially continuous and define channels <NUM> having semi-ellipsoidal cross sections. Conversely, the recessed surface <NUM> and the sidewalls <NUM> defining the channels formed in the inserts may intersect to define channels <NUM> having polygonal (e.g. rectangular) cross sections.

The distinction in channel definition between the main body <NUM> and the inserts <NUM> is configured to maximize traction and to minimize abrasion of the ground-engaging surface <NUM>. For example, although the main body <NUM> is formed of a durable foam material, it may exhibit lower resistance to abrasion than the material forming the inserts <NUM>. By providing "softened" edges, the channels <NUM> are less likely to be subjected to concentrations of high load and abrasion, thereby improving durability. Conversely, the inserts <NUM> are formed of a material having a relatively higher abrasion resistance. Accordingly, the channels <NUM> of the inserts <NUM> may be formed with "harder" edges to provide improved traction, especially on soft ground surfaces.

With reference to <FIG>, an example of the sole structure <NUM>, <NUM>' is provided, and includes a main body <NUM>, <NUM>' and a plurality of the inserts <NUM>, <NUM>' cooperating to define the ground-engaging surface <NUM>, <NUM>' having a plurality of the channels <NUM>, <NUM>' formed therein. As discussed hereinabove, the main body <NUM>' is formed of a first, foam material while the inserts <NUM>' are formed of one or more rubber materials.

As shown in <FIG> and <FIG>, the main body <NUM>' defines a first region of the ground-engaging surface <NUM>' and the one or more side surfaces <NUM>' extending between the ground-engaging surface <NUM>' and an upper surface <NUM> of the sole structure <NUM>'.

In the illustrated example, the inserts <NUM>' of the sole structure <NUM>' include an anterior insert 260a' disposed within an anterior socket 252a' of the main body <NUM>', and a posterior insert 260b' disposed within a posterior socket 252b' of the main body. As shown in <FIG>, the anterior insert 260a' extends from the anterior end <NUM> to the ball region 12b, and from the lateral side <NUM> to the medial side <NUM>. Accordingly, the anterior insert 260a' substantially defines the ground-engaging surface <NUM>' in the toe portion <NUM>T of the forefoot region <NUM>. The posterior insert 260b' extends from the posterior end <NUM> to an intermediate portion of the heel region <NUM>, and extends from the lateral side <NUM> to the medial side. The intermediate portion of the heel region <NUM> may be defined by a transition between a convex portion of the ground-engaging surface <NUM>', which extends forward from the posterior end <NUM>, and a substantially flat portion of the ground-engaging surface <NUM>', as illustrated in <FIG>. Accordingly, the main body <NUM>' defines the ground-engaging surface <NUM>' extending from the toe portion <NUM>T to the intermediate portion of the heel region <NUM>, and interfaces with the anterior insert 260a' and the posterior insert 260b' at opposing ends, respectively.

The sole structure <NUM>' includes a plurality of the channels <NUM>, <NUM>', 210a'-210j' formed therein. As shown in <FIG>, a first end channels <NUM>', 210a' substantially defines a first end of the first region of the ground-engaging surface <NUM>' and a second end channel 210b' substantially defines a second end of the first region of the ground-engaging surface <NUM>', whereby sidewalls 256a', 256b' defining the respective sockets 252a', 252b' correspond with a profile of the respective end channels 210a', 210b'. Each of the first end channel 210a' and the second end channel 210b' include a plurality of serially-arranged segments <NUM> and extend along the lateral side surface 206a', the ground-engaging surface <NUM>', and the medial side surface 206b'.

The main body <NUM>' of the sole structure <NUM>' further includes a plurality of third channels 210c' formed adjacent to the first end channel 210a'. The third channels 210c' include serially-arranged segments <NUM> extending from the lateral side surface 206a' to the medial side surface 206b'. The segments <NUM> are arranged at alternating angles to each other to define a waveform or chevron pattern corresponding substantially to the shape of the first end channel 210a' such that the channels 210a', 210c' define a repeating chevron pattern extending in a direction along the longitudinal axis AF towards the posterior end <NUM>. Similarly, a plurality of fourth channels 210d' are formed adjacent the second channel 210b' and are spaced in the direction along the longitudinal axis AF towards the anterior end <NUM>.

The main body <NUM>' of the sole structure <NUM>' may further include a branched fifth channel 210e' extending from the lateral side surface 206a' to the medial side surface 206b'. The branched fifth channel 210e' includes a first sub-channel 210e<NUM>' including of a series of segments <NUM> serially arranged at alternating angles to each other and extending from the lateral side surface 206a' to a junction <NUM> at an intermediate portion of the ground-engaging surface <NUM>'. The branched channel 210e' is further defined by a pair of sub-channels 210e<NUM>', 210e<NUM>' diverging from the first sub-channel 210e<NUM>'at the intermediate portion of the ground-engaging surface <NUM>' and each extending onto the medial side surface 206b'.

With continued reference to <FIG>, the sole structure <NUM>' includes a serpentine sixth channel 210f' disposed adjacent to the branched channel 210e' and extending from the lateral side surface 206a' to the medial side surface 206b', and including sub-channel 210f<NUM>' having a plurality of segments <NUM> arranged in a serpentine configuration disposed in a central region of the ground-engaging surface <NUM>'. The serpentine configuration of the sixth channel 210f' is defined by a first segment <NUM> extending from a first end node 224a to a second end node 224a at a first angle, a second segment <NUM> extending from the second end node 224a to a third end node 224a at a second angle substantially perpendicular to the first angle, a third segment <NUM> extending from the third end node 224a to a fourth end node 224a at the first angle, a fourth segment <NUM> extending from the fourth end node 224a to a fifth end node 224a at the second angle, a fifth segment <NUM> extending from the fifth end node 224a to a sixth end node 224a at the first angle, and a sixth segment <NUM> extending from the sixth end node 224a to a seventh end node 224a at the second angle, whereby the first, third, and fifth segments <NUM> are parallel to each other, with the fifth segment <NUM> being disposed intermediate the first segment <NUM> and the third segment <NUM>. Likewise, the second, fourth, and sixth segments <NUM> are parallel to each other, with the fourth segment <NUM> being disposed between the second segment <NUM> and the sixth segment <NUM>.

The main body <NUM>' of the sole structure <NUM>' may further include a seventh channel <NUM>' having a horseshoe-like shape, whereby a first end and a second end of the seventh channel <NUM>' are both formed on the same side surface, and an intermediate portion of the channel extends onto the ground-engaging surface <NUM>'.

With continued reference to <FIG>, the anterior insert 260a' includes a plurality of eighth channels 210i' that are substantially complementary in shape to the first end channel 210a' of the main body <NUM>'. Likewise, the posterior insert 260b' includes a plurality of ninth channels 210j' that are substantially complementary to the second end channel 210b'. Accordingly, the eighth and ninth channels 210i', 210j' cooperate with the respective end channels 210a', 210b' to define a waveform-shaped interface between the sidewalls 256a' of the main body <NUM>' and the peripheral surfaces 264a', 264b' of the inserts 260a', 260b'.

The widths Wc of the channels 210i', 210j' may taper from one side <NUM>, <NUM> of the sole-structure <NUM>' to the other side <NUM>, <NUM>. For example, in the anterior insert 260a', the widths WC1 of the nodes <NUM> may progressively decrease in a direction from the lateral side <NUM> to the medial side <NUM>. Conversely, in the posterior insert 260b', the widths WC1 of the nodes <NUM> may progressively increase in a direction from the lateral side <NUM> to the medial side <NUM>. The channels 210i', 210j' of each of the inserts 260a', 260b' may include apertures <NUM> formed therethrough, which expose the underlying recessed surfaces 254a', 254b' of the main body <NUM>'. In the illustrated example, the apertures <NUM> are formed through the nodes <NUM> of the channels 210i', 210j' and progressively decrease or increase in width (i.e. diameter) from one side <NUM>, <NUM> to the other side <NUM>, <NUM>, similar to the nodes <NUM>.

As discussed above, the inserts <NUM>' of the sole structure <NUM>' are configured to provide regions of the ground-engaging surface <NUM>' with increased traction and abrasion resistance relative to the main body <NUM>'. However, because the material forming the inserts <NUM>' has a greater density than the material forming the main body <NUM>' it is desirable to provide the inserts <NUM>' only in regions of the ground-engaging surface <NUM>' that are subjected to relatively high concentrations of force in order to provide a balance between the overall weight and desired performance of the sole structure <NUM>'. For example, in the example of the sole structure <NUM>' shown in <FIG> the anterior insert 260a' and the posterior insert 260b' are configured to absorb greater forces associated with forward motion, while the main body <NUM>' is configured to define the ground-engaging surface <NUM>' in regions that are subjected to lesser forces than the inserts <NUM>'.

With reference to <FIG>, another example of the sole structure <NUM>, <NUM>" is provided, and includes a main body <NUM>, <NUM>" and a plurality of the inserts <NUM>, <NUM>" cooperating to define the ground-engaging surface <NUM>, <NUM>" having a plurality of the channels <NUM>, <NUM>" formed therein. As discussed hereinabove, the main body <NUM>" is formed of a first, foam material, while the inserts <NUM>" are formed of one or more rubber materials.

As shown in <FIG> and <FIG>, the main body <NUM>" defines a first region of the ground-engaging surface <NUM>", and the one or more side surfaces <NUM>" extending between the ground-engaging surface <NUM>" and an upper surface <NUM> of the sole structure <NUM>". In the illustrated example, the sole structure <NUM>" includes an anterior insert 260a" disposed within an anterior socket 252a" of the main body <NUM>" and a posterior insert 260b" disposed within a posterior socket 252b" of the main body <NUM>". As shown in <FIG>, the anterior insert 260a" extends from the anterior end <NUM> to the midfoot region <NUM>, and from the lateral side <NUM> to the medial side <NUM>. Accordingly, the anterior insert 260a" substantially defines the ground-engaging surface <NUM>" in the forefoot region <NUM> of the sole structure <NUM>". The posterior insert 260b" extends from the posterior end <NUM> to the midfoot region <NUM>, and extends from the lateral side <NUM> to the medial side <NUM>. Accordingly, the posterior insert 260b" substantially defines the ground-engaging surface <NUM>" in the heel region <NUM> of the sole structure <NUM>". Thus, the main body <NUM>" defines the ground-engaging surface <NUM>" extending through the midfoot region <NUM>, and interfaces with the anterior insert 260a" and the posterior insert 260b" at opposing ends, respectively.

The sole structure <NUM>' includes a plurality of the channels <NUM>, <NUM>", 210a"-210j" formed therein. As shown in <FIG>, a first end channel 210a" substantially defines a first end region of the ground-engaging surface <NUM>" defined by the main body <NUM>", and a second end channel 210b" substantially defines a second end of the region of the ground-engaging surface <NUM>" defined by the main body <NUM>", whereby sidewalls 256a", 256b" defining the respective sockets 252a", 252b" correspond with a profile of the respective end channels 210a", 210b".

With reference to <FIG>, the first end channel 210a" is branched and comprises a plurality of sub-channels 210a<NUM>-<NUM>". A first sub-channel 210a<NUM>" and a second sub-channel 210a<NUM>" are joined at a first junction <NUM> defined by a first end node 224a, and cooperate to define a profile of the sidewall 256a" of the anterior socket 252a". A third sub-channel 210a<NUM>" extends from the first junction <NUM> and is arranged in a serpentine configuration disposed in a central portion of the ground-engaging surface <NUM>". The serpentine configuration is defined by a first segment <NUM> extending from a first end node 224a at the first junction <NUM> to a second end node 224a at a first angle with respect to the longitudinal axis AF, a second segment <NUM> extending from the second end node 224a to a third end node 224a at a second angle substantially perpendicular to the first angle, a third segment <NUM> extending from third end node 224a to a fourth end node 224a at the first angle, a fourth segment <NUM> extending from the fourth end node 224a to a fifth end node 224a at the second angle, and a fifth segment <NUM> extending from the sixth end node 224a to a seventh end node <NUM> at the first angle, whereby the third segment <NUM> is disposed between and parallel to the first segment <NUM> and the fifth segment <NUM>. The seventh end node <NUM> of the third sub-channel 210a<NUM> defines a second junction <NUM> from which each of the fourth sub-channel 210a<NUM>" and the fifth sub-channel 210a<NUM>" diverge and extend onto medial side surface 206b".

The second end channel 210b" includes a plurality of serially-arranged segments <NUM> and extends from the lateral side surface 206a", along the ground-engaging surface <NUM>", and onto the medial side surface 206b".

The main body <NUM>" of the sole structure <NUM>" further includes a third channel 210c" formed adjacent to the first end channel 210a". The third channel 210c" includes serially-arranged segments <NUM> extending from the lateral side surface 206a" to the medial side surface 206b". The segments <NUM> are arranged at alternating angles to each other to define a waveform or chevron pattern corresponding substantially to the profile of the first end channel 210a".

The main body <NUM>" of the sole structure <NUM>" may further include a branched fourth channel <NUM>'', 210d" extending from the lateral side surface 206a" to the medial side surface 206b". The branched fourth channel 210d" includes a first sub-channel 210d<NUM>" including of a series of segments <NUM> serially arranged at alternating angles to each other and extending from the medial side surface 206b" to an intermediate portion of the ground-engaging surface <NUM>". The branched fourth channel 210d" is further defined by a pair of sub-channels 210d<NUM>", 210d<NUM>" diverging from the first sub-channel 210d<NUM>" at the intermediate portion of the ground-engaging surface <NUM>" and each extending onto the lateral side surface 206a".

With continued reference to <FIG>, the anterior insert 260a" includes a plurality of fifth channels 210e" extending between the lateral side <NUM> and the medial side <NUM> of the anterior insert 260a". A branched sixth channel 210f" is disposed adjacent to the plurality of the fifth channels 210e" and extends continuously between the lateral side <NUM> and the medial side <NUM>. The branched sixth channel 210f" includes a first sub-channel 210f<NUM>" extending from the lateral side <NUM> to a junction <NUM> in an intermediate portion of the ground-engaging-surface <NUM>", and a pair of sub-channels 210f<NUM>", 210f<NUM>" diverging from the junction <NUM> and extending to the medial side <NUM> of the anterior insert 260a". The anterior insert 260a" further includes a seventh channel <NUM>" disposed intermediate the branched sixth channel 210f" and the first end channel 210a" of the main body <NUM>". The seventh channel 210f" extends from the lateral side <NUM> of the anterior insert 260a" and intersects the first end channel 210a" formed in the main body <NUM>".

The posterior insert 260b' includes a plurality of eighth channels <NUM>" extending between the lateral side <NUM> and the medial side <NUM> of the posterior insert 260b'. A pair of ninth channels 210i" extend from the lateral side <NUM> of the posterior insert 260b" to terminal ends intermediate the longitudinal axis AF and the medial side <NUM>. Similarly, a tenth channel 210j" extends from the medial side <NUM> to a terminal end intermediate the longitudinal axis AF and the medial side <NUM>.

The widths Wc of the channels 210a"-210j" may taper from one side <NUM>, <NUM> of the sole-structure <NUM>" to the other <NUM>, <NUM>. For example, in the anterior insert 260a", the widths WC1 of the nodes <NUM> may progressively decrease in a direction from the lateral side <NUM> to the medial side <NUM>. Conversely, in the posterior insert 260b", the widths WC1 of the nodes <NUM> may progressively increase in a direction from the lateral side <NUM> to the medial side <NUM>. The channels 210i"-210j" of each of the inserts 260a", 260b" may include apertures <NUM> formed therethrough, which expose the underlying recessed surfaces 254a", 254b" of the main body <NUM>". In the illustrated example, the apertures <NUM> are formed through the nodes <NUM> of the channels 210e"-210j" and progressively decrease or increase in width (i.e. diameter) from one side <NUM>, <NUM> to the other side <NUM>, <NUM>, similar to the nodes <NUM>.

As discussed above, the inserts <NUM>" of the sole structure <NUM>" are configured to provide areas of the ground-engaging surface <NUM>" with increased traction and abrasion resistance. However, because the material forming the inserts <NUM>" has a greater density than the material forming the main body <NUM>" it is desirable to provide the inserts <NUM>" only in regions of the ground-engaging surface <NUM>" that are subjected to relatively high concentrations of force in order to minimize overall weight of the sole structure <NUM>". For example, in the example of the sole structure <NUM>" shown in <FIG> the anterior insert 260a" and the posterior insert 260b" are configured to absorb greater forces associated with forward and side-to-side motion, while the main body is configured to define regions of the ground-engaging surface <NUM>" that are subjected to lesser forces than the regions defined by the inserts <NUM>".

With reference to <FIG>, another example of the sole structure <NUM>, <NUM>‴ is provided, and includes a main body <NUM>, <NUM>‴ and a plurality of the inserts <NUM>, <NUM>‴ cooperating to define the ground-engaging surface <NUM>, <NUM>‴ having a plurality of the channels <NUM>, <NUM>‴ formed therein. As discussed hereinabove, the main body <NUM>‴ is formed of a first, foam material while the inserts <NUM>‴ are formed of one or more rubber materials.

As shown in <FIG> and <FIG>, the main body <NUM>‴ defines a first region of the ground-engaging surface <NUM>"', and the one or more side surfaces <NUM>‴ extending between the ground-engaging surface <NUM>‴ and an upper surface <NUM> of the sole structure <NUM>"'. In the illustrated example, the sole structure <NUM>‴ includes an anterior insert 260a‴ received within an anterior socket 252a‴ of the main body <NUM>"', a posterior insert 260b‴ received within a posterior socket 252b‴ of the main body <NUM>"', a lateral insert 252c‴ disposed within a lateral socket 252c‴ of the main body <NUM>"', and a medial insert 260d‴ disposed within a medial socket 252d"'.

As shown in <FIG>, the anterior insert 260a" extends from the anterior end <NUM> to an intermediate portion of the forefoot region <NUM>, and from the lateral side <NUM> to the medial side <NUM>. Accordingly, the anterior insert 260a‴ substantially defines the ground-engaging surface <NUM>‴ in the forefoot region <NUM> of the sole structure <NUM>‴. The posterior insert 260b‴ extends from the posterior end <NUM> to an intermediate portion of the heel region <NUM>, and extends from the lateral side <NUM> to the medial side <NUM>. Accordingly, the posterior insert 260b‴ substantially defines the ground-engaging surface <NUM>‴ in the heel region of the sole structure <NUM>". The lateral insert 206c‴ extends from a first side adjacent the lateral side <NUM> of the sole structure to a second side intermediate the lateral side <NUM> and the longitudinal axis AF, and from a first end opposing the anterior insert 260a‴ to a second end at the midfoot region <NUM>. Likewise, the medial insert 206d‴ extends from a first side adjacent the medial side <NUM> to a second side intermediate the medial side <NUM> and the longitudinal axis AF, and from a first end opposing the anterior insert 260a‴ to a second end at the midfoot region <NUM>. The inserts <NUM>‴ are all spaced apart from each other by the main body <NUM>‴.

The sole structure <NUM>' includes a plurality of the channels <NUM>, <NUM>‴, 210a‴-210j‴ formed therein. As shown in <FIG>, a first end channel <NUM>‴, 210a‴ substantially defines a first end of the first region of the ground-engaging surface <NUM>"', thereby defining a profile of the interface between the peripheral surface 264a‴ of the anterior insert 260a‴ and the sidewall 256a‴ of the anterior socket 252a"'. The first end channel 210a‴ extends continuously from the lateral side surface 206a‴ to the medial side surface 206b‴ along the main body <NUM>‴.

A second end channel 210b‴ substantially defines a second end of the first region of the ground-engaging surface <NUM>‴ defined by the main body <NUM>‴ and includes a first sub-channel 210b<NUM>‴ and a second sub-channel 210b<NUM>‴. The first sub-channel 210b<NUM>‴ extends from the lateral side surface 206a‴ to a terminal end on the ground-engaging surface <NUM>"', intermediate the longitudinal axis AF and the medial side <NUM>. The second sub-channel 210b<NUM>‴ extends from the medial side surface 202b‴ to a terminal end on the ground-engaging surface <NUM>"', intermediate the longitudinal axis AF and the medial side <NUM>. Accordingly, the second channel 210b‴ may be described as including an interruption between the first sub-channel 210b<NUM>‴ and the second sub-channel 210b<NUM>‴.

A third channel 210c‴ is disposed adjacent to the first end channel 210a‴ and extends continuously from the lateral side surface 206a‴ to the medial side surface 206b‴ along the ground-engaging surface <NUM>‴ and within the main body <NUM>"'. Accordingly, the third channel 210c‴ substantially defines a profile of the interfaces between the peripheral surfaces 264c‴, 264d‴ of the lateral and medial inserts 260c"', 260d‴ and the sidewalls 256c‴, 256d‴ of the lateral and medial sockets 252c"', 252d"'. Particularly, the third channel 210c‴ defines the interfaces at the first ends of the lateral and medial inserts 260c"', 260d"'. As shown, the interfaces have a substantially chevron-shaped profile corresponding a profile of the third channel 210c"'.

The sole structure <NUM>‴ includes a plurality of fourth channels 210d‴ each extending continuously from the lateral side <NUM> to the medial side <NUM> and traversing the main body <NUM>‴ and at least one of the lateral insert 260c‴ and the medial insert 260d"'. As shown in <FIG>, at least one of the fourth channels 210d‴ extends from the lateral side <NUM> along ground-engaging surface of the lateral insert 260c"', traverses a portion of the main body <NUM>‴ that separates the lateral insert 260c‴ and the medial insert 260d"', and continues across the medial inert 260d‴ to the medial side <NUM>. Additional channels 210d‴ may extend from the lateral side <NUM> along the lateral insert 260c‴ and continue to the medial side <NUM> along the main body <NUM>"', adjacent to the second end of the medial insert 260d"'.

The main body <NUM>‴ includes a branched fifth channel 210e‴ including a serpentine sub-channel 210e<NUM>‴. A first sub-channel 210e<NUM>‴ and a second sub-channel 210a<NUM>‴ are joined at a first junction <NUM> defined by a first end node 224a and cooperate to extend continuously from the lateral side surface 206a‴ to the medial side surface 206b‴. A third sub-channel 210e<NUM>‴ extends from the first junction <NUM> and is arranged in a serpentine configuration disposed in a central portion of the ground-engaging surface <NUM>‴. The serpentine configuration is defined by a first segment <NUM> extending from the first end node 224a at the first junction <NUM> to a second end node 224a at a first angle with respect to the longitudinal axis AF, a second segment <NUM> extending from the second end node 224a to a third end node 224a at a second angle substantially perpendicular to the first angle, a third segment <NUM> extending from the third end node 224a to a fourth end node 224a at the first angle, and a fourth segment extending from the fourth end node 224a, towards the first segment <NUM> at the second angle, and terminating at a fifth end node 224a intermediate the second segment <NUM> and the second sub-channel 210a<NUM>‴.

The main body <NUM>‴ further includes a pair of sixth channels 210f‴ disposed intermediate the second channel 210b‴ and the branched fifth channel 210e"', and extending from the lateral side surface 206a‴ to the medial side surface 206b"'. A seventh channel <NUM>‴ is disposed between the sixth channels 210f‴ at the lateral side <NUM> of the sole structure <NUM>‴ and extends from a first end on the lateral side surface 206a"', onto the ground-engaging surface <NUM>"', and back to a second end on the lateral side surface 206a"'. An eighth channel <NUM>‴ is disposed between the second end channel 210b‴ and the pair of the sixth channels 210f‴, and extends from the lateral side surface 206a‴ to a terminal end on the ground-engaging surface <NUM>"', intermediate the longitudinal axis AF and the medial side <NUM> of the sole structure <NUM>‴.

The anterior insert 260a‴ includes a plurality of ninth channels 210i‴ formed therein and extending continuously from the lateral side <NUM> to the medial side <NUM>. Profiles of the ninth channels 210i‴ of the anterior insert 260a‴ are complementary to a profile of the first end channel 210a‴ and form a repeating chevron pattern along the anterior insert 260a"'. Likewise, the posterior insert 260b‴ includes a plurality of tenth channels 210j‴ formed therein and extending continuously from the lateral side <NUM> to the medial side <NUM>. Profiles of the tenth channels 210j‴ are complementary to a profile of the second end channel 210b‴ and form a repeating chevron pattern along the posterior insert 260b‴.

The widths Wc of the channels 210a‴-210j‴ may taper from one side <NUM>, <NUM> of the sole-structure <NUM>‴ to the other <NUM>, <NUM>. For example, in the anterior insert 260a"', the widths WC1 of the nodes <NUM> may progressively decrease in a direction from the lateral side <NUM> to the medial side <NUM>. Conversely, in the posterior insert 260b‴, the widths WC1 of the nodes <NUM> may progressively increase in a direction from the lateral side <NUM> to the medial side <NUM>.

The channels 210i"-210n" of each of the inserts 260a‴, 260b‴, and 260d‴ may include apertures <NUM> formed therethrough, which expose the underlying recessed surfaces 254a'", 254b"', and 254d‴ of the main body <NUM>"'. In the illustrated example, the anterior insert 260a‴ includes apertures formed through the nodes <NUM> disposed substantially on the lateral side <NUM> of the sole structure, while the posterior insert 260b‴ includes apertures formed through the nodes <NUM> disposed substantially on the medial side <NUM> of the sole structure <NUM>"'. As shown, all nodes <NUM> of the lateral insert 260c‴ include apertures formed therethrough, while none of the nodes <NUM> of the medial insert 260d‴ include apertures. Additionally or alternatively, all of the inserts <NUM>‴ may include apertures <NUM> formed through all of their nodes <NUM>, or none of the inserts <NUM>‴ may include apertures <NUM>.

As discussed above, the inserts <NUM>‴ of the sole structure <NUM>‴ are configured to provide areas of the ground-engaging surface <NUM>‴ with increased traction and abrasion resistance. However, because the material forming the inserts <NUM>‴ has a greater density than the material forming the main body <NUM>‴ it is desirable to provide the inserts <NUM>‴ only in regions of the ground-engaging surface <NUM>‴ that are subjected to relatively high concentrations of force. For example, in the example of the sole structure <NUM>‴ shown in <FIG> the anterior insert 260a‴ and the posterior insert 260b‴ are configured to absorb relatively high forces associated with forward running, the lateral insert 260c‴ and the medial insert 260d‴ are configured to absorb relatively-high forces associated with side-to-side movements, and the main body <NUM>‴ is configured to define regions of the ground-engaging surface <NUM>‴ that are subjected to lesser forces than the regions defined by the inserts <NUM>‴.

Claim 1:
A sole structure (<NUM>, <NUM>') for an article of footwear, the sole structure (<NUM>, <NUM>') comprising:
a main body (<NUM>, <NUM>') formed of a first material and defining a first region of a ground-engaging surface including a first channel (<NUM>), the first channel (<NUM>) including a plurality of segments (<NUM>), wherein each of the segments (<NUM>) includes two or more nodes (<NUM>) connected to each other by intermediate necked regions (<NUM>), and extends from a first end node (224a) to a second end node (224a) along a longitudinal segment axis (As), and at least one insert (<NUM>, <NUM>') formed of a second material and received by the main body (<NUM>, <NUM>'), the plurality of segments (<NUM>) (i) extending between a lateral side (<NUM>) and a medial side (<NUM>) of the sole structure (<NUM>, <NUM>'), (ii) being serially end-to-end arranged, (iii) being arranged at alternating angles to each other to define a waveform pattern, and (iv) including at least one segment (<NUM>) having sidewalls (<NUM>) that provide the at least one segment (<NUM>) with a variable width along a length of the at least one segment (<NUM>), wherein the plurality of segments (<NUM>) includes a first segment (<NUM>) extending from a first end node (224a) to a second end node (224a) along a first segment axis (AS1), a second segment (<NUM>) extending from the second end node (224a) to a third end node (224a) along a second segment axis (AS2) disposed at an oblique angle with respect to the first segment axis (AS1), and a third segment (<NUM>) extending from the third end node (224a) to a forth end node (224a) along a third segment axis (AS3) that is substantially parallel to the first segment axis (AS1) and oblique to the second segment axis (AS2).