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Sockliner

a technology of socks and soles, applied in the field of socks, can solve the problems of limited durability of closed cell foam, inability to provide adequate shock absorption, and inability to absorb shock

Inactive Publication Date: 2011-02-24
NINE WEST DEVMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Over time, injury can result from these forces.
However, closed cell foam has limited durability and degrades over time eventually failing to provide adequate shock absorption.

Method used

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Examples

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Embodiment Construction

[0013]Referring to the drawings and in particular FIG. 1, a sockliner or inner sole is designated in its entirety by the reference number 11. The sockliner has a forward part 13 (generally underlying and supporting toes and metatarsal heads of a wearer), a middle part 15 (generally underlying and supporting an arch of the wearer), and a back part 17 (generally underlying and supporting a heel of the wearer). In some embodiments, the sockliner 11 is sized and shaped to be inserted in footwear (not shown) so it rests on a sole of the footwear. The sockliner 11 attenuates shock imparted on a foot in the footwear during running and walking. Although the illustrated sockliner 11 is sized and shaped to underlie the enter area of the foot, other sizes and shapes may be used without departing from the scope of the invention. For instance, the sockliner 11 may be a “three-quarter length” sockliner sized for extending from a heel of the foot to a position slightly in front of the metatarsal h...

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Abstract

A laminated foam sockliner for use in combination with footwear. The sockliner has a forward part generally underlying and supporting toes and metatarsal heads, a middle part generally underlying and supporting an arch, and a back part generally underlying and supporting a heel of the wearer. The sockliner includes a porous upper layer made from a flexible air permeable material. The upper layer provides support for at least a portion of the foot of the wearer including a heel and an arch of the foot. The sockliner also includes a shockfoam layer positioned generally at the back part of the sockliner below the upper layer. A top surface of the shockfoam layer being permanently bonded to at least a portion of a bottom surface of the upper layer underlying the back part of the sockliner. The forward part of the sockliner substantially lacks the shockfoam layer.

Description

FIELD OF THE INVENTION[0001]The present invention generally relates to footwear and more particularly to footwear having a sockliner for cushioning a foot in the footwear.BACKGROUND OF THE INVENTION[0002]During walking and running, various portions of the foot impact the ground at different times resulting in certain parts of the foot being subjected to repeated impact forces. For instance, an outside portion of the heel experiences high impact forces during the initial heel strike phase of a gait cycle. These forces can transfer to other parts of the leg including the shins and knees. Over time, injury can result from these forces.[0003]Foam sockliners are used to attenuate impact forces applied to the feet during walking and running. These liners are frequently made using a closed cell polyurethane or EVA (ethylene vinyl acetate) foam in a heel portion of the sockliner due to the ability of these types of foam to attenuate shock. Theses sockliners help to reduce the forces transfe...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A43B7/06A43B13/38A43D11/00
CPCA43B3/0057A43B7/144A43B7/149A43B17/14A43B17/02A43B17/08A43B17/006
Inventor LUDEMANN, JOHN F.
Owner NINE WEST DEVMENT
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