Patent Grant
9060569
The present invention relates generally to an article of footwear, and in particular to a footwear component for an article of footwear.
Inserts for articles of footwear have been previously proposed. Cort (U.S. Pat. No. 1,697,589) teaches a shoe with an inner sole blank. Cort teaches that the inner sole blank is first split from its heel end to form lower and upper laminations. A cushioning member comprises a soft sponge rubber and is inserted into the split.
Dardinski et al. (U.S. Pat. No. 7,461,470) teaches a shoe footbed system. Dardinski teaches a footbed that can include a stiffening member. The stiffening member can be made from one or more different materials including thermoplastic urethane (TPU), EVA or nylon.
The related art lacks provisions for accommodating the natural bending of the foot, especially near the toes of the foot. There is a need for a design that addresses this problem of the related art.
In one aspect, a footwear component for an article of footwear, comprising: a longitudinal direction extending along a length of the footwear component; a first portion and a second portion, the second portion being disposed rearwardly of the first portion in the longitudinal direction; the footwear component comprising a first material and a second material that is different from the first material; the first portion being constructed of the first material and being substantially monolithic; the second portion comprising an upper layer, an intermediate layer and a lower layer, the intermediate layer being disposed between the upper layer and the lower layer, the intermediate layer being distal to the upper layer and the lower layer being distal to the intermediate layer; the intermediate layer being constructed of the first material and the upper layer and the lower layer being constructed of the second material; and where the first portion is substantially more flexible than the second portion.
In another aspect, the invention provides a method of making a footwear component for an article of footwear, comprising the steps of: reducing the thickness of a portion of a flexible member to form an intermediate layer; forming an upper layer on the intermediate layer and forming a lower layer on the intermediate layer using a second material that is different from a first material used to construct the flexible member; the upper layer, the intermediate layer and the lower layer being associated with a second portion of the footwear component that is disposed rearwardly of a first portion; a first thickness of the first portion being substantially similar to a second thickness of the second portion in a transition zone where the first portion and the second portion are connected; and where the first portion is substantially more flexible than the second portion.
In another aspect, the invention provides a method of making a customized footwear component for an article of footwear, comprising the steps of: receiving information related to user selected transition zone; forming a transition zone on the footwear component corresponding the user selected transition zone, the transition zone separating a first portion of the footwear component from a second portion of the footwear component that is disposed rearwardly of the first portion; and where the first portion has a substantially different rigidity than the second portion.
In one aspect, the invention provides a footwear component for an article of footwear, comprising: a longitudinal direction extending along a length of the footwear component; a first portion and a second portion, the second portion being disposed rearwardly of the first portion in the longitudinal direction; the footwear component comprising a first material and a second material that is different from the first material; the first portion being constructed of the first material and being substantially monolithic; the second portion comprising an upper layer, an intermediate layer and a lower layer, the intermediate layer being disposed between the upper layer and the lower layer, the intermediate layer being distal to the upper layer and the lower layer being distal to the intermediate layer; the intermediate layer being constructed of the second material and the upper layer and the lower layer being constructed of the first material; the second portion comprising a central cavity that extends through the upper layer, the intermediate layer and the lower layer; an insert configured for insertion into the central cavity; and wherein the insert comprises a third material that is substantially different from the first material and the second material.
Other systems, methods, features and advantages of the invention will be, or will become, apparent to one of ordinary skill in the art upon examination of the following figures and detailed description. It is intended that all such additional systems, methods, features and advantages be included within this description and this summary, be within the scope of the invention, and be protected by the following claims.
The invention can be better understood with reference to the following drawings and description. The components in the figures are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the invention. Moreover, in the figures, like reference numerals designate corresponding parts throughout the different views.
For purposes of illustration, footwear component 100 is shown in isolation in the current embodiment. In other embodiments, however, footwear component 100 may be associated with an article of footwear. Generally, footwear component 100 may be used with any type of footwear including, but not limited to: hiking boots, soccer shoes, football shoes, sneakers, rugby shoes, basketball shoes, baseball shoes as well as other kinds of shoes. As shown in the Figures, footwear component 100 is intended to be used with a right article of footwear; however, it should be understood that the following discussion may equally apply to a mirror image of footwear component 100 that is intended for use with a left article of footwear.
For purposes of reference, footwear component 100 may be divided into forefoot portion 10, midfoot portion 12 and heel portion 14. Forefoot portion 10 may be generally associated with the toes and joints connecting the metatarsals with the phalanges. Midfoot portion 12 may be generally associated with the arch of a foot. Likewise, heel portion 14 may be generally associated with the heel of a foot, including the calcaneus bone. In addition, footwear component 100 may include lateral side 16 and medial side 18. In particular, lateral side 16 and medial side 18 may be opposing sides of footwear component 100. Furthermore, both lateral side 16 and medial side 18 may extend through forefoot portion 10, midfoot portion 12 and heel portion 14.
It will be understood that forefoot portion 10, midfoot portion 12 and heel portion 14 are only intended for purposes of description and are not intended to demarcate precise regions of footwear component 100. Likewise, lateral side 16 and medial side 18 are intended to represent generally two sides of a component, rather than precisely demarcating footwear component 100 into two halves. In addition, forefoot portion 10, midfoot portion 12 and heel portion 14, as well as lateral side 16 and medial side 18, can also be applied to individual portions of a footwear component.
For consistency and convenience, directional adjectives are employed throughout this detailed description corresponding to the illustrated embodiments. The term “longitudinal” as used throughout this detailed description and in the claims refers to a direction extending a length of a footwear component. In some cases, the longitudinal direction may extend from a forefoot portion to a heel portion of the footwear component. Also, the term “lateral” as used throughout this detailed description and in the claims refers to a direction extending a width of a footwear component. In other words, the lateral direction may extend between a medial side and a lateral side of a footwear component. Furthermore, the term “vertical” as used throughout this detailed description and in the claims refers to a direction generally perpendicular to a lateral and longitudinal direction. For example, in cases where an article of footwear is planted flat on a ground surface, the vertical direction may extend from the ground surface upward. In addition, the term “proximal” refers to a portion of a footwear component that is closer to a portion of a foot when an article of footwear is worn. Likewise, the term “distal” refers to a portion of a footwear component that is further from a portion of a foot when an article of footwear is worn. It will be understood that each of these directional adjectives may be applied to individual portions of a footwear component.
A footwear component can include provisions for tuning the flexibility of an article of footwear. In some cases, a footwear component can comprise distinct portions having different levels of flexibility. In an exemplary embodiment, a footwear component can comprise two distinct portions that have different flexibility properties.
In the current embodiment, footwear component 100 includes first portion 120 and second portion 122 that is disposed rearwardly of first portion 120 in the longitudinal direction. In some cases, first portion 120 may have a first rigidity and second portion 122 may have a second rigidity. In one embodiment, first portion 120 may be substantially less rigid than second portion 122. In other words, first portion 120 may be substantially more flexible than second portion 122. In other embodiments, however, second portion 122 may be less rigid than first portion 120.
In one embodiment, first portion 120 may comprise a substantially monolithic portion. In contrast, second portion 122 may comprise a substantially layered portion. In some cases, second portion 122 may comprise upper layer 132, lower layer 136 and intermediate layer 134 that is disposed between upper layer 132 and lower layer 136. In some cases, upper layer 132 may be proximal to intermediate layer 134 and lower layer 136. Likewise, intermediate layer 134 may be proximal to lower layer 136. With this arrangement, lower layer 136 may be disposed closer to a ground engaging surface, while upper layer 132 may be disposed closer to a foot.
First portion 120 may be made of a first material. Similarly, intermediate layer 134 of second portion 122 may be made of the first material. In some cases, intermediate layer 134 may be integrally formed with first portion 120. In contrast, second portion 122 may comprise at least two distinct materials. For example, in one embodiment, second portion 122 may comprise the first material and a second material that is substantially different from the first material. In particular, intermediate layer 134 may be made of the first material, while upper layer 132 and lower layer 136 may be made of the second material. In still other embodiments, upper layer 132 and lower layer 136 could be made of substantially different materials from one another. In other words, in other embodiments, second portion 122 could comprise three or more distinct materials. In still another embodiment, upper layer 132, intermediate layer 134 and lower layer 136 could all comprise substantially similar materials.
First portion 120 and second portion 122 may be generally connected at transition zone 150. The term “transition zone” as used throughout this detailed description and in the claims, refers to transition region between first portion 120 and second portion 122. In particular, transition zone 150 is a zone where the flexibility of footwear component 100 changes substantially between first portion 120 and second portion 122. Transition zone 150 generally extends between lateral side 16 and medial side 18 and has small width extending approximately in the longitudinal direction. In other words, the flexibility and/or rigidity characteristics of footwear component 100 may change gradually between first portion 120 and second portion 122 across the width of transition zone 150.
In some embodiments, transition zone 150 may serve as a flexing region, about which first portion 120 may flex with respect to second portion 122. In some cases, transition zone 150 could be aligned with natural bending regions of a foot. For example, in one embodiment, transition zone 150 could be approximately aligned with the region between the proximal phalanges and metatarsals of the foot. With this arrangement, first portion 120 may bend with the toes of the foot about second portion 122 to accommodate the natural bending of the foot during use.
In different embodiments, the thickness of footwear component 100 can vary. In some embodiments, the thickness of footwear component 100 can be substantially constant along the longitudinal direction. In other embodiments, the thickness of footwear component 100 can vary. As an example, the thickness of footwear component 100 may vary between first portion 120 and second portion 122. Moreover, in some cases, the thickness of first portion 120 may remain substantially constant, while the thickness of second portion 122 may increase between midfoot portion 12 and heel portion 14.
In an exemplary embodiment, the thickness of first portion 120 and second portion 122 may remain substantially similar throughout transition zone 150 to facilitate a strong connection between first portion 120 and second portion 122. For example, in the current embodiment, first portion 120 may have thickness T3. In addition, within transition zone 150 footwear component 100 has thickness T4 which is substantially similar to thickness T3. In other cases, however, thickness T4 could be substantially greater than thickness T3. In still other cases, thickness T4 could be substantially less than thickness T3.
Referring to
Flexible member 200 can comprise any substantially flexible material. In some cases, flexible member 200 can be made of a non-woven material. Examples of non-woven materials include non-woven fabrics such as felt. In other cases, flexible member 200 can be made of any other material that can undergo various kinds of deformation including cutting, shearing, compression or any other kind of deformation. In another embodiment, flexible member 200 could be made of a substantially flexible plastic material.
In the exemplary embodiment, the thickness of a portion of flexible member 200 may be reduced to form intermediate layer 134. In this case, intermediate layer 134 may be associated with second portion 122 of flexible member 200, which extends rearwardly from first portion 120. This arrangement provides flexible member 200 with upper recessed portion 210 and lower recessed portion 212. Moreover, in the current embodiment, first portion 120 may retain a thickness T1 which is associated with the original thickness of flexible member 200, while intermediate layer 134 may be associated with a thickness T2 that is substantially less than thickness T1. It will be understood that in different embodiments, thickness T1 and thickness T2 can have any values. In some cases, by modifying the values of thickness T1 and thickness T2, the relative rigidity of first portion 120 and second portion 122 can be varied.
Referring to
As previously discussed, the exemplary embodiment uses a second material for upper layer 132 and lower layer 136 that are substantially different than the first material comprising first portion 120 and intermediate layer 134 of second portion 122. Furthermore, the first material, which comprises flexible member 200, may be made of a substantially flexible material such as a non-woven material or any other substantially flexible material. Generally the second material may be selected to have a greater rigidity than the first material, and thus the second material may be less flexible than the first material. Examples of materials that could be used for the second material include, but are not limited to, polymers, metals, woven and non-woven fabrics, composite materials as well as any other materials. In an exemplary embodiment, the second material may be made of thermoplastic polyurethane (TPU). In other embodiments, however, the second material could be less rigid than the first material or have a substantially similar rigidity to the first material. In cases where the rigidities of the two materials are not substantially different, the rigidities of first portion 120 and second portion 122 can be tuned by varying the layered structure of second portion 122.
As illustrated, footwear component 100 is configured to bend at transition zone 150, which is approximately aligned with the natural bending region of foot 710 associated with the joints between the proximal phalanges and metatarsals of the foot. In this case, the front of forefoot portion 10 of article 700 remains planted on the ground, with midfoot portion 12 and heel portion 14 raised up as foot 710 undergoes some bending associated with the toes. In other words, transition zone 150 acts in a hinge-like manner to accommodate the bending of foot 710 and provide for a more natural motion during use of article 700.
In some embodiments, the location of transition zone 150 could vary. In some cases, transition zone 150 could be disposed in forefoot portion 10. In other cases, transition zone 150 could be disposed in midfoot portion 12. In still other cases, transition zone 150 could be disposed in heel portion 14. By varying the location of transition zone 150, the flexibility of different regions of footwear component 100 can vary.
In one embodiment, first portion 720 may comprise a substantially monolithic portion. In contrast, second portion 722 may comprise a substantially layered portion. In some cases, second portion 722 may comprise upper layer 732, lower layer 736 and intermediate layer 734 that is disposed between upper layer 732 and lower layer 736. In some cases, upper layer 732 may be proximal to intermediate layer 734 and lower layer 736. Likewise, intermediate layer 734 may be proximal to lower layer 736. With this arrangement, lower layer 736 may be disposed closer to a ground engaging surface, while upper layer 732 may be disposed closer to a foot.
First portion 720 and second portion 722 may be generally connected at transition zone 750. In particular, transition zone 750 is a zone where the flexibility of footwear component 715 changes substantially between first portion 720 and second portion 722. Transition zone 750 generally extends between lateral side 16 and medial side 18 and has small width extending approximately in the longitudinal direction. In other words, the flexibility and/or rigidity characteristics of footwear component 715 may change gradually between first portion 720 and second portion 722 across the width of transition zone 750.
In the exemplary embodiment, transition zone 750 may be disposed at toe portion 760 of footwear component 715. In other words, second portion 722 extends throughout a substantial majority of forefoot portion 10. Moreover, transition zone 750 may be disposed substantially forwards of transition zone 150 of the previous embodiment. Using this arrangement, transition zone 750 may provide for increased flexibility at the forward most portion of footwear component 715.
In still other embodiments, other layered arrangements for one or more portions of a footwear component could be used. For example, in another embodiment, a portion of a footwear component could comprise four or more layers which alternate between layers of a first material and a second material. By varying the number of layers as well as the material properties of each layer, the rigidity and flexibility characteristics of different portions of a footwear component can be fined tuned to accommodate bending of a foot.
A footwear component can include provisions for tuning the flexibility to accommodate variations in the anatomy of a foot. In some embodiments, the configuration of a transition zone can be changed to tune the flexibility properties of a footwear component. Specifically, in some cases, the location, orientation and/or shape of a transition zone can be changed.
Generally, a transition zone can have various configurations. In some embodiments, a transition zone can have a substantially linear configuration. For example, in some cases, a transition zone can be arranged as linear transition zone that is oriented in a substantially lateral direction. In other cases, a transition zone can be oriented in a substantially longitudinal direction or a diagonal direction. In other embodiments, however, a transition zone can be arranged in a substantially nonlinear configuration. For example, in some cases, a transition zone can have a generally wavy shape that extends between the lateral and medial sides of a footwear component. In other cases, a transition zone can be arranged in any other nonlinear configuration.
It will be understood that the term “nonlinear configuration” is not intended to be limited to a particular type of nonlinear shape or arrangement. For example, a nonlinear configuration for a transition zone can include smooth nonlinear shapes such as sinusoidal shapes, wavy shapes, as well as other smooth nonlinear shapes. Also, a nonlinear configuration for a transition zone can include polygonal nonlinear shapes with edges such as zig-zag shapes, triangle wave shapes, square wave shapes, as well as any other types of non-smooth nonlinear shapes. Furthermore, in some cases, a transition zone can be associated with a regular nonlinear configuration that includes repeating patterns. In other cases, however, a transition zone can be associated with an irregular nonlinear configuration that does not include repeating patterns. In still other cases, a transition zone can be associated with a nonlinear configuration that includes some portions with repeating patterns and other portions with non-repeating patterns. Still further, some transition zones can include nonlinear configurations that are symmetric about an axis of a footwear component. For example, in embodiments including a transition zone with a configuration that is sinusoidal, the transition zone may be substantially symmetric about a central longitudinal axis of the footwear component. In contrast, in other embodiments including transition zones with configurations that are irregular wave configurations, the transition zones may not be symmetric about any axis of the footwear component.
First portion 1020 and second portion 1022 are connected at transition zone 1050. In this case, transition zone 1050 has a substantially nonlinear configuration. In particular, transition zone 1050 has a smooth wavy pattern that extends from lateral side 1016 to medial side 1018 of footwear component 1000. By using a nonlinear configuration the flexibility of transition zone 1050 can be modified from a transition zone having a substantially linear configuration.
Referring to
In this embodiment, transition zone 1150 has a nonlinear configuration. In particular, transition zone 1150 has a jagged irregular nonlinear configuration. In addition, the orientation and location of transition zone 1150 has been modified from the previous embodiments. In particular, transition zone 1150 has a substantially diagonal orientation from lateral side 1116 to medial side 1118 that is angled with respect to the lateral direction. This arrangement may be useful for accommodating bending in a foot with a bending region that is oriented in a substantially similar diagonal manner.
In some embodiments, a proprietor can provide a customization system that allows for the manufacturing of footwear components with customized transition zones that are tuned to accommodate the unique foot anatomies of various different users. In some cases, the customization system can include provisions that allow a user to design or select a transition zone. In an exemplary embodiment a customer may use a customization system to select the size, orientation and shape of a transition zone that best approximates the natural bending region of the foot of the user.
Graphical interface system 1300 may include a footwear component representation 1320 that is a graphical representation of a footwear component. In addition, graphical interface system 1300 can include pointer 1322 and various menus for altering various characteristics of footwear component representation 1320. In addition, in some embodiments, graphical interface system 1300 can include other features for modifying footwear component representation 1320. Examples of various features that may be associated with a graphical interface system are discussed in U.S. patent application Ser. No. 11/612,320, which was filed on Dec. 18, 2006, the entirety of which is hereby incorporated by reference.
Referring to
A user may obtain information related to the size, shape and orientation of a bending region of a foot in any manner. In some cases, a proprietor may provide methods and/or specific measuring devices that provide bending region information. For example, in some cases the shape and geometry of the foot of a user can be measured at a retail store using footwear scanning technology. In other cases, a proprietor can provide instructions for taking measurements of a foot to obtain the necessary information for selecting a corresponding transition zone. Furthermore, while the current embodiment illustrates steps of manually selecting the shape, location and orientation of transition zones for a footwear component, other embodiments can include provisions for automatically selecting customized transition zones for a user according to various measurements of the foot or other anatomical properties of the foot of the user. Still further, in other cases, the transition zone configuration for a footwear component could be automatically selected according to the intended use of an article of footwear.
Referring to
At this point, flexible member 1620 may be cut at second portion 1632 from heel portion 1614 to transition zone 1650. In particular, the cut may be made in a plane that extends through the longitudinal and lateral directions. This cutting acts to separate second portion 1632 of flexible member 1620 into upper layer 1622 and lower layer 1624. It will be understood that flexible member 1620 may be cut using any known methods including knives, laser cutting, saws, any types of blades as well as any other methods known in the art for cutting or separating a portion into distinct layers or laminates.
Next, as illustrated in
In one embodiment, the second material may be substantially more rigid than the first material. In an exemplary embodiment, for example, the first material may be a non-woven fabric and the second material may be TPU. This arrangement allows for different flexibility characteristics between first portion 1630 and second portion 1632.
As previously discussed, the location of a transition zone can be varied in different embodiments. Transition zone 2050 may be disposed between first portion 1630 and second portion 1632. In the current embodiment, transition zone 2050 is disposed in toe portion 1660 of footwear component 2000. In other words, transition zone 2050 is disposed substantially close to a forward most portion of footwear component 2000. Moreover, transition zone 2050 is disposed substantially forwards of the location of transition zone 1650 of the previous embodiment. With this arrangement, transition zone 2050 may provide for increased flexibility at toe portion 1660.
A footwear component can include provisions for modifying the flexibility and/or strength of different portions. In some cases, a footwear component could include an insert. In an exemplary embodiment, a footwear component may include an insert that is disposed in a layered portion of the footwear component.
Footwear component 2100 may include insert 2200. Insert 2200 may include first portion 2210 and second portion 2212. Insert 2200 may also include intermediate portion 2214 that is disposed between first portion 2210 and second portion 2212. In some cases, first portion 2210 may extend into forefoot portion 10 and second portion 2212 may extend into heel portion 14. Furthermore, intermediate portion 2214 may extend through midfoot portion 12.
In different embodiments, the geometry of insert 2200 can vary. In the current embodiment, insert 2200 may have a geometry that is contoured to the shape of footwear component 2100. In particular, the width of insert 2200 may vary from first portion 2210 to second portion 2212 in a manner that corresponds to the varying width of footwear component 2100 between forefoot portion 10 and heel portion 14.
Insert 2200 can include base portion 2220 and top portion 2222. In some cases, top portion 2222 may be exposed on top surface 2190 of footwear component 2100. Base portion 2220 may extend downwardly from top portion 2222. In some cases, peripheral portion 2224 of top portion 2222 may extend outwardly from base portion 2220.
In some cases, second portion 2132 of footwear component 2100 may be configured with central cavity 2180 for receiving insert 2200. In some cases, base portion 2220 may be configured to insert into central cavity 2180, while top portion 2222 may be exposed on top surface 2190. In an exemplary embodiment, central cavity 2180 may be extend throughout the entire thickness of footwear component 2100 so that base portion 2220 of insert 2200 may be exposed on lower surface 2192 of footwear component 2100.
In an exemplary embodiment, central cavity 2180 may include peripheral ledge portion 2182 that is recessed with respect to top surface 2190. This arrangement allows top portion 2222 to fit down into peripheral ledge portion 2182 so that top portion 2222 may be approximately flush with top surface 2190. In other embodiments, however, top portion 2222 may extend upwardly from top surface 2190. In still other embodiments, top portion 2222 may be recessed with respect to top surface 2190.
In different embodiments, the materials used for insert 2200 could vary. In some cases, insert 2200 could be made of a relatively stiff material. For example, in some cases, insert 2200 could be made of a material with a rigidity that is substantially greater than the rigidity of second portion 2232 of footwear component 2100. In other cases, insert 2200 could be made of a relatively flexible material. For example, in some cases, insert 2200 could be made of a material that is substantially less rigid than second portion 2232 of footwear component 2100. In still another embodiment, insert 2200 could be made of a material having a substantially similar rigidity to the rigidity of second portion 2232. In other words, by varying the materials used for insert 2200 as well as the materials used for flexible portion 2120 and intermediate layer 2202, the relative rigidity of insert 2200 and second portion 2232 can be varied.
In one embodiment, upper layer 2122 and lower layer 2124 may be made of a first material, intermediate layer 2202 may be made of a second material and insert 2200 may be made of a third material. In some cases, the first material, the second material and the third material may all be substantially different materials. In one embodiment, the third material may be more rigid than the first material and the second material. This arrangement may help to increase the stiffness of second portion 2232. In another embodiment, the third material may be more rigid than the first material but less rigid than the second material. This arrangement may be used to increase the flexibility of second portion 2232. In still another embodiment, the third material could be less rigid than both the first material and the second material. It will be understood that an insert could also be used to vary other material characteristics of a footwear component.
In some embodiments, insert 2200 may include channel 2250. In some cases, channel 2250 may be a hollow channel that extends through top portion 2222 of insert 2200. Furthermore, in some cases, channel 2250 may extend through base portion 2220 of insert 2200 as well. In the current embodiment, channel 2250 may extend from first portion 2210 to intermediate portion 2214 of insert 2200. In addition, in the exemplary embodiment, channel 2250 may be connected to circular recess 2260 that is disposed in intermediate portion 2214. By varying the size, depth and shape of channel 2250, the flexibility and/or strength of insert 2200 can be further tuned to enhance the corresponding strength and/or flexibility of footwear component 2100. Furthermore, while the current embodiment includes a single channel, in other embodiments additional channels could also be used.
A footwear component can include provisions for reducing weight. In some embodiments, a footwear component can include one or more hollowed out portions. In some cases, hollowed out portions could be provided in a forefoot portion of a footwear component. In other cases, hollowed out portions could be provided in a midfoot portion of a footwear component. In an exemplary embodiment, hollowed out portions could be provided in a heel portion of a footwear component.
Referring now to
It will be understood that hollowed out portion 2300 is optional and may not be included in all embodiments. Furthermore, the number and location of hollowed out portions can vary from one embodiment to another. Although the current embodiment includes hollowed out portion 2300 disposed in heel portion 14 of footwear component 2100, other embodiments could include one or more hollowed out portions in any other locations of footwear component 2100. Also, while hollowed out portion 2300 is visible through hole 2320 in the current embodiment, in other embodiments, hollowed out portion 2300 may not be visible.
An insert can be formed in any manner. In some cases, an insert could be formed using a molding process. In particular, a cavity may be formed within a portion of a footwear component and the insert could be molded to fit into the cavity. In other cases, an insert could be a stock fit component that is configured to fit into a pre-formed cavity of the footwear component. In still other cases, an insert could be formed in any other manner.
In one embodiment, first portion 2620 may comprise a substantially monolithic portion. In contrast, second portion 2622 may comprise a substantially layered portion. In some cases, second portion 2622 may comprise upper layer 2632, lower layer 2636 and intermediate layer 2634 that is disposed between upper layer 2632 and lower layer 2636. In some cases, upper layer 2632 may be proximal to intermediate layer 2634 and lower layer 2636. Likewise, intermediate layer 2634 may be proximal to lower layer 2636. With this arrangement, lower layer 2636 may be disposed closer to a ground engaging surface, while upper layer 2632 may be disposed closer to a foot.
First portion 2620 and second portion 2622 may be generally connected at transition zone 2650. In particular, transition zone 2650 is a zone where the flexibility of footwear component 2600 changes substantially between first portion 2620 and second portion 2622. Transition zone 2650 generally extends between lateral side 16 and medial side 18 and has small width extending approximately in the longitudinal direction. In other words, the flexibility and/or rigidity characteristics of footwear component 2600 may change gradually between first portion 2620 and second portion 2622 across the width of transition zone 2650.
Insert 2700 may be substantially similar to insert 2200 of the previous embodiment. In particular, insert 2700 may comprise base portion 2720 and top portion 2722. In addition, in some cases, insert 2700 may include channel 2760 that extends through top portion 2222, as well as circular recess 2762. Furthermore, second portion 2622 of footwear component 2600 may include central cavity 2680 for receiving insert 2700. With this arrangement, insert 2700 may used to fine tune the flexibility and/or strength of second portion 2622 of footwear component 2600.
In some embodiments, an insert could be removable by a user of an article of footwear. In some cases, a user may be provided with two or more different inserts having different material characteristics. A user could then interchange one insert with another insert in order to vary the properties of a footwear component.
While various embodiments of the invention have been described, the description is intended to be exemplary, rather than limiting and it will be apparent to those of ordinary skill in the art that many more embodiments and implementations are possible that are within the scope of the invention. Accordingly, the invention is not to be restricted except in light of the attached claims and their equivalents. Also, various modifications and changes may be made within the scope of the attached claims.
This application is a Division of U.S. application Ser. No. 12/702,980 entitled “Footwear Component For An Article Of Footwear,” filed on Feb. 9, 2010, allowed Mar. 8, 2013, and now U.S. Pat. No. 8,479,416, the disclosure of which is hereby incorporated by reference in its entirety.
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| Number | Date | Country | |
|---|---|---|---|
| 20130333241 A1 | Dec 2013 | US |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 12702980 | Feb 2010 | US |
| Child | 13911432 | US |
