Shoe system with a resilient shoe insert

a technology of resilient shoes and springs, which is applied in the field of resilient shoe spring systems, can solve the problems of reducing the biomechanical effect, affecting the effect of foot movement, so as to shorten the effective length of legs

Inactive Publication Date: 2006-03-09
LINDQVIST WILHELM OVE +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0002] Users and developers of elastic shoes and shoe soles are confronted with the problem of back injury and releasing the stored energy in the shoe sole in a manner which improves walking and running economy while at the same time achieving adequate bio-mechanical shoe stability and cushioning. Many shoe manufacturers have concentrated their effort on chock absorption by permanently increasing the thickness of the shoe sole. This has resulted in a slight change of the angle between the ankle and the foot that may weaken the tendons of the foot. This change of the angle may also lead to instability and reduced bio-mechanical effect.
[0005] The method and shoe system of the present invention provide a solution to the above-mentioned problems. More particularly, the method is for using a shoe system having a resilient shoe insert. A shoe has a shoe insert disposed inside the shoe. The insert has an upper leg and a lower leg connected by a front end with a curvature. The upper and lower legs 506 have a concave segments and end points. A load is put on the insert to compress the end points towards one another. This shortens the effective length of the legs because the legs are in contact at a contact segment. This makes the insert stiffer the more it is compressed. The effective length of the legs is shorter at the outside compared to the inside so that the outside is stiffer than the inside.

Problems solved by technology

This has resulted in a slight change of the angle between the ankle and the foot that may weaken the tendons of the foot.
This change of the angle may also lead to instability and reduced bio-mechanical effect.
However, the earlier proposed spring designs for shoe soles have not been entirely satisfactory.
Despite many elaborate shoe sole solutions, back injuries and other injuries are still common due to poorly designed shoes.
Injuries due to poor shoe designs are particularly common in sports and heavy duty work activities.
If the shoe is unstable and has high heel elevation when the athlete is moving from one side to another the likelihood is great the athlete may suffer an ankle sprain.
The majority of conventional shoes are not well designed.
This shortens the effective length of the legs because the legs are in contact at a contact segment.

Method used

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  • Shoe system with a resilient shoe insert
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  • Shoe system with a resilient shoe insert

Examples

Experimental program
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fifth embodiment

[0039]FIGS. 13 and 14 show the present invention. A shoe 300 has a shoe sole 302 including an upper layer 303 with a shoe insert 304 integrated with or built into the sole 302. The shoe 300 has a toe portion 330 and a heel portion 332 and shoe sole 302 has a bottom side 305. The insert 304 has a relatively stiff upper segment 306 and a bendable lower segment 308 that is attached to a lower side 310 of the segment 306 at a mid-section 312 of the upper segment 306. The segment 306 is, preferably, attached to a back piece 301 that is disposed at the upper segment 303 adjacent to a backside 309 of the shoe 300. The upper segment 306 and the lower segment 308 have a space 307 defined therebetween. The space 307 may be filled with air or a very compressible and expandable material. The space 307 may be completely or partially filled with a material. For example, the material may include segments of an elastomeric material to change the spring characteristics of the insert 304. Stiffer ela...

sixth embodiment

[0046]FIG. 16 shows a resilient shoe insert 500 of the present invention. The insert 500 may also be placed inside the shoe 300, as shown in FIGS. 13-14, and replace the insert 304 placed inside the shoe 300. The insert 500 has a slanted straight front-end 502, a rounded back end 504 and a narrow mid-section 506. The insert 500 may be made of a composite material such as continuous fibers that extend from the back end 504, such as from the outer end 520, around the front end 502 and back to the back end 504, such as to the outer end 522. The fibers may also merely extend from the back end to the front end.

[0047] With reference to FIGS. 17a-c, the shoe insert 500 has an upper leg 506 with a straight upper leg segment 508 that terminates in a concave upper segment 510. The leg segments 508, 516 may also be slightly concave. Preferably, the segments 508, 516 are less concave than the segment 510. The segment 510 extends to the front-end 502 that is an attachment segment 512. The segmen...

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Abstract

The method is for using a shoe system having a resilient shoe insert. A shoe (300) has a shoe insert (500) disposed inside the shoe. The insert has an upper leg (506) and a lower leg (514) connected by a front end (502) with a curvature (512). The legs (506, 514) have a concave segments (510, 518) and end points (520, 522), respectively; A load is put on the insert to compress the end points towards one another. This shortens the effective length of the legs (506, 514) because the legs are in contact at a contact segment (524). This makes the insert stiffer the more it is compressed. The effective length of the legs is shorter at the outside (530) compared to the inside (532) so that the outside is stiffer than the inside.

Description

TECHNICAL FIELD [0001] The present invention relates to a resilient shoe spring system that is intergrated with a shoe system. BACKGROUND AND SUMMARY OF THE INVENTION [0002] Users and developers of elastic shoes and shoe soles are confronted with the problem of back injury and releasing the stored energy in the shoe sole in a manner which improves walking and running economy while at the same time achieving adequate bio-mechanical shoe stability and cushioning. Many shoe manufacturers have concentrated their effort on chock absorption by permanently increasing the thickness of the shoe sole. This has resulted in a slight change of the angle between the ankle and the foot that may weaken the tendons of the foot. This change of the angle may also lead to instability and reduced bio-mechanical effect. [0003] Many efforts have been made to develop an effective spring mechanism for shoes or shoe soles. However, the earlier proposed spring designs for shoe soles have not been entirely sat...

Claims

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Application Information

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IPC IPC(8): A43B13/28A43B13/12A43B13/18A43B13/20A43B21/26A43B21/28A43B21/30
CPCA43B13/026A43B13/12A43B13/183A43B21/30A43B13/203A43B21/26A43B21/285A43B13/187
InventorLINDQVIST, WILHELM OVELARSSON, HANSLINDH, LEIFLINDH, KJELL
OwnerLINDQVIST WILHELM OVE