A sole component for footwear combining the desirable response characteristics of a fluid filled chamber and an elastomeric material is disclosed. The chamber can be formed as a single bladder chamber in contact with an elastomeric midsole or as a single chamber by a sealing a void in elastomeric ma
A sole component for footwear combining the desirable response characteristics of a fluid filled chamber and an elastomeric material is disclosed. The chamber can be formed as a single bladder chamber in contact with an elastomeric midsole or as a single chamber by a sealing a void in elastomeric material. Alternately, an insert having the shape of the bladder, and potentially formed from foam, may be positioned within the chamber. The interface between the chamber and elastomeric material is sloped and gradual so that the shape of the chamber and its placement in a midsole determine the combination of response characteristics in the sole component. The chamber has a relatively simple shape with one axis of symmetry with a rounded portion and a narrow portion.
대표청구항▼
The invention claimed is: 1. An article of footwear having a sole that includes at least one insert at least partially encapsulated within the sole, the insert comprising: a first surface having a first perimeter with a pear shape, at least a portion of the first surface being substantially planar;
The invention claimed is: 1. An article of footwear having a sole that includes at least one insert at least partially encapsulated within the sole, the insert comprising: a first surface having a first perimeter with a pear shape, at least a portion of the first surface being substantially planar; a second surface spaced from the first surface, the second surface having a second perimeter with a pear shape, at least a portion of the second surface being substantially planar, and the second surface having fifty percent less area than the first surface; and a sidewall surface extending between the first perimeter and the second perimeter, the sidewall surface tapering inward between the first surface and the second surface, wherein a portion of the sole adjacent to the insert is formed from a first foam material and the insert is formed from a second foam material. 2. The footwear recited in claim 1, wherein the first foam material is less compressible than the second foam material. 3. The footwear recited in claim 1, wherein the sole defines a void that receives the insert. 4. The footwear recited in claim 3, wherein the void is a depression in an upper surface of a midsole portion of the sole, and the first surface of the insert is positioned at an elevation of the upper surface. 5. The footwear recited in claim 1, wherein the void is a depression in a lower surface of a midsole portion of the sole, and the first surface of the insert is positioned at an elevation of the lower surface. 6. The footwear recited in claim 1, wherein a substantial portion of the first surface and a substantial portion of the second surface are planar. 7. The footwear recited in claim 6, wherein the substantial portion of the first surface is substantially parallel to the substantial portion of the second surface. 8. The footwear recited in claim 1, wherein the first surface has a pair of rounded end areas, and one of the rounded end areas of the first surface is larger than another of the rounded end areas of the first surface. 9. The footwear recited in claim 1, wherein the insert is positioned in a removable sockliner of the footwear. 10. The footwear recited in claim 1, wherein the insert is positioned in a heel region of the footwear and at a position that corresponds with a calcaneus of a foot. 11. The footwear recited in claim 1, wherein the insert is positioned to correspond with a joint between phalanges and metatarsals of the foot. 12. The footwear recited in claim 1, wherein the at least one insert is a first insert and a second insert, the first insert being oriented in a medial-lateral direction and positioned to correspond with a joint between phalanges and metatarsals of the foot, and the second insert is positioned forward of the first insert and oriented in a direction of a longitudinal length of the midsole. 13. The footwear recited in claim 1, wherein a cover sheet is secured to the midsole and extends over the insert. 14. The footwear recited in claim 13, wherein the cover sheet contacts one of the first surface and the second surface of the insert. 15. An article of footwear having a sole component comprising: a midsole formed from a first foam material, the midsole having an upper surface and an opposite lower surface, and the midsole defining a void; an insert formed from a second foam material that is less compressible than the first foam material, the insert being at least partially positioned within the void, and the insert having a first surface, an opposite second surface, and a sidewall surface extending between a perimeter of the first surface and a perimeter of the second surface, the first surface having a greater area then the second surface such that the sidewall surface tapers between the first surface and the second surface; and a cover sheet secured to the midsole and extending over the insert, the cover sheet contacting one of the first surface and the second surface of the insert. 16. The footwear recited in claim 15, wherein the void forms a depression in the midsole, and the first surface of the insert is positioned at an elevation of the upper surface of the midsole. 17. The footwear recited in claim 15, wherein the void forms a depression in the midsole, and the depression has a shape that corresponds with the second surface and the sidewall surface. 18. The footwear recited in claim 15, wherein a substantial portion of the first surface and a substantial portion of the second surface are planar. 19. The footwear recited in claim 18, wherein the substantial portion of the first surface is substantially parallel to the substantial portion of the second surface. 20. The footwear recited in claim 15, wherein the first surface has a pair of rounded end areas, one of the rounded end areas being larger than another of the rounded end areas. 21. The footwear recited in claim 20, wherein the first surface is symmetrical about an axis extending between the rounded end areas and otherwise asymmetrical. 22. The footwear recited in claim 15, wherein at least one of the first surface and the second surface have a pear shape. 23. The footwear recited in claim 15, wherein a portion of the first surface is substantially parallel to a portion of the second surface. 24. An article of footwear having a sole component comprising: a midsole formed from a first foam material, the midsole having an upper surface, a lower surface positioned opposite the upper surface, and a void surface extending downward from the upper surface and defining a void in the upper surface; and an insert formed from a second foam material that is different than the first foam material, the insert having a first surface, an opposite second surface, and a sidewall surface extending between a perimeter of the first surface and a perimeter of the second surface, the first surface having a pair of rounded end areas, one of the rounded end areas being larger than another of the rounded end areas, and the first surface having a greater area than the second surface such that the sidewall surface tapers between the first surface and the second surface, wherein the insert is positioned within the void such that the sidewall surface and the second surface of the insert contact the void surface of the midsole. 25. The article of footwear recited in claim 24, wherein a cover sheet is secured to the upper surface of the midsole and extends over the insert. 26. The article of footwear recited in claim 24, wherein the first foam material is less compressible than the second foam material. 27. The article of footwear recited in claim 24, wherein a substantial portion of the first surface of the insert and a substantial portion of the second surface of the insert are planar. 28. The article of footwear recited in claim 27, wherein the first surface is substantially parallel to the second surface. 29. The article of footwear recited in claim 24, wherein the insert is positioned in a heel region of the footwear and at a position that corresponds with a calcaneus of a foot. 30. An article of footwear having a sole component comprising: a midsole formed from a foam material, the midsole having an upper surface and an opposite lower surface, the upper surface defining a first void and a second void extending toward the lower surface; and a first insert and a second insert formed from foam materials that are different than the foam material of the midsole, the first insert being positioned within the first void and the second insert being positioned within the second void, each of the inserts having a first surface, an opposite second surface, and a sidewall surface extending between a perimeter of the first surface and a perimeter of the second surface, the first surface having a pair of rounded end areas, one of the rounded end areas being larger than another of the rounded end areas, and the first surface having a greater area than the second surface such that the sidewall surface tapers between the first surface and the second surface, each of the inserts also having an axis extending between the rounded end areas, the axis of the first insert being orthogonal to the axis of the second insert. 31. The article of footwear recited in claim 30, wherein a cover sheet is secured to the upper surface of the midsole and extends over the first insert and the second insert. 32. The article of footwear recited in claim 30, wherein the foam material of the midsole is less compressible than the foam materials of the inserts. 33. The article of footwear recited in claim 30, wherein a substantial portion of the first surface and a substantial portion of the second surface are planar. 34. The article of footwear recited in claim 33, wherein the first surface is substantially parallel to the second surface. 35. The article of footwear recited in claim 30, wherein the inserts are positioned in a forefoot region of the midsole, and another insert is positioned in a heel region of the midsole.
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