阅读说明：本技术 具有分阶段压缩刚度的圆顶状鞋底夹层 (Dome midsole with staged compression stiffness ) 是由 帕特里克·卡斯 扎卡里·M·埃尔德 李·D·佩顿 于 2018-05-18 设计创作，主要内容包括：一种用于鞋类物品的鞋底结构,包括鞋底夹层,该鞋底夹层包括第一缓冲层、第二缓冲层和第三缓冲层。第一缓冲层具有中央部分和围绕中央部分的周边部分。第一缓冲层、第二缓冲层和第三缓冲层堆叠,其中第二缓冲层直接叠加在第一缓冲层的周边部分上,并且第三缓冲层叠加在第二缓冲层上并直接叠加在第一缓冲层的中央部分上。第一缓冲层具有圆顶状下表面,该圆顶状下表面远离第二缓冲层和第三缓冲层延伸并且基本上在中央部分下方居中。(A sole structure for an article of footwear includes a midsole including a first cushioning layer, a second cushioning layer, and a third cushioning layer. The first cushioning layer has a central portion and a peripheral portion surrounding the central portion. The first buffer layer, the second buffer layer, and the third buffer layer are stacked, wherein the second buffer layer directly overlies a peripheral portion of the first buffer layer, and the third buffer layer overlies the second buffer layer and directly overlies a central portion of the first buffer layer. The first cushioning layer has a domed lower surface extending away from the second and third cushioning layers and substantially centered under the central portion.)

1. A sole structure for an article of footwear, the sole structure comprising:

a midsole comprising a first cushioning layer, a second cushioning layer, and a third cushioning layer; wherein:

the first buffer layer has a central portion and a peripheral portion surrounding the central portion;

the first buffer layer, the second buffer layer, and the third buffer layer stack, wherein the second buffer layer directly overlies the peripheral portion of the first buffer layer, and the third buffer layer overlies the second buffer layer and directly overlies the central portion of the first buffer layer; and

the first cushioning layer has a domed lower surface extending away from the second and third cushioning layers and substantially centered under the central portion.

2. The sole structure of claim 1, wherein:

the first cushioning layer has a first stiffness, the second cushioning layer has a second stiffness greater than the first stiffness, and the third cushioning layer has a third stiffness, and dynamic compressive loads on the sole structure are absorbed by the first, second, and third cushioning layers in order according to the relative magnitudes of the first, second, and third stiffnesses.

3. The sole structure of claim 1 or claim 2, wherein at least one of the first, second, and third cushioning layers is foam.

4. The sole structure of claim 3, wherein each of the first, second, and third cushioning layers is a foam.

5. The sole structure of claim 1 or claim 2, wherein the first cushioning layer includes a first sealed chamber that maintains a gas at a first predetermined pressure in an unloaded state, and the second cushioning layer includes a second sealed chamber that maintains a gas at a second predetermined pressure that is higher than the first predetermined pressure in the unloaded state.

6. The sole structure of claim 5, wherein:

the midsole includes a first polymer sheet, a second polymer sheet, and a third polymer sheet;

the first sealed chamber is defined by the first polymeric sheet and the second polymeric sheet; and

the second sealed chamber is defined by the second polymeric sheet and the third polymeric sheet.

7. The sole structure of claim 6, wherein:

the second polymer sheet and the third polymer sheet are bonded to each other at a bond having an outer perimeter with a closed shape between the first sealed chamber and the third cushioning layer;

the second sealed chamber abuts the outer perimeter of the joint; and

the domed lower surface is substantially centered below the bond.

8. The sole structure of claim 7, wherein the closed shape is substantially elliptical, substantially circular, or an equilateral polygon.

9. The sole structure of claim 7 or claim 8, wherein the second sealed chamber is substantially annular.

10. The sole structure of any of claims 7-9, wherein the junction is disposed substantially flush with an uppermost extension of the second sealed chamber when the sole structure is in an unloaded condition.

11. The sole structure of any of claims 6-10, further comprising:

an outsole secured to the domed lower surface of the first polymeric sheet;

wherein the outsole comprises a central lug substantially centered under the domed lower surface of the first polymeric sheet and providing a ground-contacting surface of the midsole; and

wherein the width of the center ear is less than the width of the domed lower surface of the first polymeric sheet such that the center ear compresses the center of the domed lower surface of the first polymeric sheet under a compressive load.

12. The sole structure of claim 11, wherein the outsole further comprises side lugs disposed adjacent the central lug;

wherein, under a first compressive load, the central lug is lower than the side lugs, and under a second compressive load greater than the first compressive load, the first cushioning layer compresses moving the side lugs flush with the central lug, thereby increasing the ground contact area of the outsole.

13. The sole structure of any of claims 6-12, wherein the first polymeric sheet and the second polymeric sheet are bonded to each other along an outer perimeter portion of an underside of the second sealed chamber such that the first sealed chamber underlies the second sealed chamber only inboard of the outer perimeter portion.

14. The sole structure of any of claims 6-13, wherein the third cushioning layer is foam.

15. The sole structure of any of claims 5-14, wherein:

the first buffer layer absorbs the dynamic compressive load in series with the second buffer layer at the peripheral portion of the first sealed chamber, and the first buffer layer absorbs the dynamic compressive load in parallel with the second buffer layer at the central portion of the first sealed chamber and in series with the third buffer layer.

16. The sole structure of any of claims 5-16, further comprising:

a tether element disposed in the second sealed chamber;

wherein the tether element comprises a first panel bonded to an inner surface of the third polymer sheet, a second panel bonded to an inner surface of the second polymer sheet, and a plurality of tensile elements connecting the first panel to the second panel and suspended across the second sealed chamber.

17. The sole structure of claim 1, wherein:

the first cushioning layer and the second cushioning layer defining a ground-facing outer surface of the midsole;

the third cushioning layer is completely displaced from the ground-facing outer surface of the midsole by the first cushioning layer and the second cushioning layer;

the second and third cushioning layers defining a foot-facing outer surface of the midsole; and

the first cushioning layer is completely displaced from the foot-facing outer surface of the midsole by the second cushioning layer and the third cushioning layer.

18. A sole structure for an article of footwear, the sole structure comprising:

a midsole having:

a first cushioning layer having a dome-shaped lower surface;

a second cushioning layer overlying the first cushioning layer and disposed at least partially in series with the first cushioning layer relative to dynamic compressive loads exerted on the midsole; and

a third cushioning layer overlying the first and second cushioning layers and disposed at least partially in series with the first cushioning layer and at least partially in series with the second cushioning layer relative to the dynamic compressive load;

wherein the first buffer layer has a first stiffness, the second buffer layer has a second stiffness greater than the first stiffness, and the third buffer layer has a third stiffness less than the second stiffness.

19. The sole structure of claim 18, wherein:

the midsole includes a first polymer sheet, a second polymer sheet, and a third polymer sheet;

the first buffer layer comprises a first sealed chamber defined by the first and second polymeric sheets and maintaining a gas at a first predetermined pressure in an unloaded state;

the second buffer layer comprises a second sealed chamber defined by the second and third polymer sheets and holding a gas at a second predetermined pressure in the unloaded state; and

the second predetermined pressure is higher than the first predetermined pressure.

20. The sole structure of claim 19, wherein:

the second polymer sheet and the third polymer sheet are bonded to each other at a bond having a substantially circular outer perimeter between the first sealed chamber and the third cushioning layer;

the second seal chamber abuts the outer periphery of the joint and is substantially annular;

the first sealed chamber is located directly below the junction; and

the first and second polymeric sheets are bonded to each other along an outer peripheral portion of the underside of the second sealed compartment such that the first sealed compartment underlies the second sealed compartment only inboard of the outer peripheral portion.

Technical Field

The present teachings generally include a sole structure for an article of footwear that includes a midsole.

Background

An article of footwear generally includes a sole structure configured to be positioned under a foot of a wearer to space the foot from a ground surface. Sole structures in athletic footwear are generally configured to provide cushioning, motion control, and/or rebound.