GB2314000A

GB2314000A - Shoe having a shaped sole

Info

Publication number: GB2314000A
Application number: GB9712022A
Authority: GB
Inventors: Deterpigny Th R Se Lefebvre
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-06-11
Filing date: 1997-06-11
Publication date: 1997-12-17
Anticipated expiration: 2017-06-11
Also published as: GB9712022D0; FR2749485B1; DE19724205C2; GB2314000B; DE19724205A1; FR2749485A1

Description

1 2314000 The invention relates to a shoe.

Shoes produced nowadays have the effect of constraining the foot owing to the fact that the shoe sole is greatly offset towards the inside of the foot. Thus (see Figure 1), a straight line A-B passing through the axis of the heel of the shoe extends towards the front of the foot, dividing the sole into two unequal surface areas of which one 1, located on the outer side of the sole, is much smaller than the other 2 located on the inner side of the sole.

owing to this shape of the sole resulting from the shape of the shoe which is itself derived from fashion, the foot has to be held in these shoes firmly by stiffeners, by wings and by rigid ends.

However, during walking and owing to the fact that the foot is constrained outside its axis, it is the external posterolateral weight of the heel which is placed on the ground as the step advances and this engagement on the ground by the heel suppresses the natural physiological effects of the foot's spring.

Therefore, in an immobile position, the two feet supported on the ground are spaced from one another by an angle of approximately 302.

This spacing of the points of the feet forces the knees not to be on the axis of the lower limb, the head of the femur can no longer be centred in the acetabulum, the pelvis rocks and is no longer in place, the sacroiliac joints are twisted and the vertebral column has to compensate as best it can for all this structure which is unbalanced at the base.

The foot raised by a heel of a few millimetres to several centimetres therefore substantially changes the position of the centre of gravity.

2 Also, during walking and owing to the construction of the sole and the shoe, the foot tends to slide forwards to such an extent that, in order to brake it, a rigid shank is provided in the shoes, while the upper is provided to fit as tightly as possible on the foot which is already constrained by the wings, the stiffener and the rigid end. In addition, the more or less pointed cone-shaped end of the shoes causes known deformities, such as overlapping hammer toes, hallux valgus, quintus varus and the appearance of corns, calluses, soft corns or the like.

The aim of the present invention is to overcome the disadvantages of these known shoes and, to that end, is relates to a shoe characterised in that it comprises a sole shaped in such a manner that the straight line passing through the axis of the heel extends towards the front end of the sole, bisecting perpendicularly the middle of a straight line which starts from the inner edge of the sole in the area of the base of the big toe or first toe and ends at the outer edge of the sole in the area of the end of the fifth toe.

According to a further feature of the invention, the sole is substantially flat and supple over its entire surface.

The invention is shown by way of non-limiting example in the appended drawings in which:

- Figure 1 is a bottom view of the sole of a right foot of a known shoe, Figure 2 is a bottom view of the sole of a left foot of a shoe according to the invention, - Figure 3 is a side view of an embodiment of a shoe according to the invention, - Figure 4 is a top view of Figure 3, 3 Figure 5 is a side view of another embodiment of a shoe according to the invention, and Figure 6 is a top view of Figure 5.

The present invention therefore aims to provide shoes having soles which facilitate walking by enabling the foot to be placed on the ground in such a manner that its construction and the structure of the human skeleton is respected.

According to Figure 2, the sole of the shoe is thus shaped in such a manner that the line C-X passing through the axis of the heel is extended in a straight line towards the forefoot by a straight line X-D which passes substantially between the second and third metatarsals and the second and third toes 02. 03. The straight line C-D, which therefore bisects perpendicularly the middle of the straight line E-F of the base of the heel, also bisects perpendicularly substantially the middle of the straight line G-H which starts from the inner edge 3 of the sole in the area of the base of the big toe 01 and ends at H at the outer edge 4 of the sole in the area of the end of the fifth toe 05.

This construction of the sole involves the formation of isosceles triangles XGH and CGH of which the apices are arranged, respectively, at X in the middle of the base of the heel and at C at the rear end of the heel. Thus, the whole of the sole is divided by the straight line D-C into two substantially equal surface areas on the axis of the foot from the rear end of the heel to the front end of the sole.' It will be appreciated that, owing to this construction, the sole widens in the area of the forefoot, this widening being substantially towards the outside of the foot in 4 order to ensure that the support of the foot on the ground is well balanced.

The shape of the shoe will of course be adapted to the sole and Figures 3 and 4 show a buckled shoe provided with a sole according to the invention, the upper 5 being widened on the outer side of the foot.

In order to ensure good stability and good balance during walking, it is also provided, according to the invention, to combine this shape of the sole with a substantially constant thickness 6, 7 of the sole, which is therefore not raised, especially in the area of the heel, as can be seen in Figures 3 and 5.

In addition. the sole is preferably produced in such a manner that it is supple over its entire surface.

Figures 5 and 6 show another type of shoe according to the invention having laces.

In order to benefit from the advantages of the shoe according to the invention, therefore, the shoe should not comprise a shank, a heel, a stiffener, a wing, or rigid ends.

Furthermore, it will not comprise a plantar support, while the upper will not comprise a cut in the area of the metatarsophalangeal joint.

Claims

1) Shoe characterised in that it comprises a sole shaped in such a manner that the straight line (C-X) passing through the axis of the heel extends towards the front end of the sole, bisecting perpendicularly the middle (Y) of a straight line (G-H) which starts from the inner edge (3) of the sole in the area of the base of the big toe (01) or f irst toe and ends at the outer edge (4) of the sole in the area of the end of the fifth toe (05).

2) Shoe according to claim 1, characterised in that the sole is substantially flat and supple over its entire surface.

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