ES1062588U - Sole for footwear - Google Patents

Abstract

Sole for footwear, of the type that materialize in a single-piece body obtained by injection molding based on synthetic materials, characterized in that said single-piece body is made, at the level of the heel area, by micro-particles of polyurethane high density that constitute a compact and essentially solid body that absorbs the small impacts that occur when walking, especially on the heel, while the sector of the same corresponding to the plant, of considerably less thickness than the heel sector, presents In the lower part, a plurality of longitudinal and transverse grooves determine a high degree of flexibility for said sole and configure gripping blocks on the ground. (Machine-translation by Google Translate, not legally binding)

Description

Sole for footwear.

Object of the invention

The present invention relates to a sole for footwear, specifically a sole of the type obtained by injection molding based on plastic materials, such as polyurethane.

The object of the invention is to achieve a sole rigid at the heel level and extraordinarily flexible at the level of the plant, despite being obtained with a single piece and at the expense of a single material, that is to say in a manufacturing process of maximum simplification

Background of the invention

Soles are known for footwear based on synthetic materials such as those mentioned above, in depending on the type of material used, they are more or less flexible, so that there are "soft" soles that result flexible and comfortable at plant level, but resulting too weak at heel level, transmitting to the foot the small impacts that occur when walking, and hard soles that eliminate the problem just cited at the heel level, but which however are uncomfortable because of the limited flexibility that They offer at plant level.

The soles of the first type end up generating microlesiones in the plant of the foot, whereas those of the second type, that is to say those with little flexibility in the plant, just generating weakening in the muscles and ligaments of the foot, to the point that atrophy can occur in certain muscles

Description of the invention

The sole proposed by the invention resolves fully satisfactory way the problem above exposed, in the different aspects commented, offering a optimum degree of hardness at heel level and resulting highly flexible at the plant level, with the particularity in addition to the lines of tendency to the flexion of the floor correspond to the flexion planes of the foot when walking.

To do this and more specifically said sole It is structured at the level of its posterior area, specifically the heel and of the enfranque, by means of micro-particles of high density polyurethane, so that this material absorbs easily the small impacts that occur on the foot when walk, especially on the heel.

Complementarily the previous part, the corresponding to the plant, is markedly under-sized in thickness with respect to the back, that is to the heel, and it is affected by deep grooves, which affect more than 50% of its thickness and that are arranged both longitudinally and transversely, determining on the one hand tacos that ensure a perfect grip of footwear on the floor, and that confer on said sole the high degree of flexibility mentioned previously.

Longitudinal grooves describe trajectories sharply arched, with concavity facing the edge inside of the sole and that are gradually phased out and back to forward in this regard, while the transverse grooves, also of arched trajectory and posterior concavity, diverge progressively from its inner edge to its outer edge, so which in their back half are tilted back and in their anterior area inclined forward.

The special arrangement of these slots and the considerable depth of them, make not only the floor be extremely flexible in this area, but also that there is a correct and permanent parallelism between the deformations of the foot when walking and deformations of the sole of the footwear, which It makes the comfort of the sole optimal.

Description of the drawings

To complement the description that is being performing and in order to help a better understanding of the characteristics of the invention, according to a preferred example of practical realization of it, is accompanied as part member of that description, a set of drawings where with illustrative and non-limiting nature, what has been represented next:

Figure 1.- Shows a plan view bottom of a sole for footwear made in accordance with the object of the present invention.

Figure 2.- Shows a profile of it sole.

Preferred Embodiment of the Invention

In view of the figures outlined you can be observed as the sole for footwear that is recommended is constituted by a single piece body, which as previously said it is obtained by the classic injection molding, but with the peculiarity that said body is constituted by high density polyurethane micro particles, with a remarkable thickness at the level of the heel (1) and the chunk (2), where said thickness is progressively reduced towards the plant (3), which is of substantially reduced thickness, such as equal to or less than 1 centimeter against a thickness greater than 2 centimeters in the heel.

The heel is substantially solid, although may have lightening material open towards its base upper, while in the plant area they are established deep longitudinal grooves (4) that intersect with grooves cross sections (5) determining a plurality of blocks (6) Binoculars that enhance the grip of the sole when walking.

As previously mentioned the slots Longitudinal (4) are curves, with concavity oriented towards the inner edge (7) of the sole and progressively offset from back to front in this regard, as seen in figure 1, while the transverse grooves (5) are also curved, in this case with its backward-facing concavity, and divergent from the inner edge (7) of the plant to the outer edge of it.

As shown in Figure 2, the slots (4) and (5) they are of very considerable depth, especially those of the middle area of the plant, which is where the largest must occur deformation of the sole when walking, getting this way, is say by profusion, arrangement and size of said slots (4-5), a high degree of flexibility for the sole, which also allows it to accompany everyone in their deformations foot movements with what in turn causes exercise to walk more homogeneous, participating in it all and each of the muscles of the foot that must do so, so avoid weakening in some of them, which in the long term they can generate motor abnormalities in the extremities lower.

Claims (3)

1. Sole for footwear, of the type that materialize in a single piece body obtained by injection molding based on synthetic materials, characterized in that said single piece body is constituted, at the level of the heel area, by polyurethane micro-particles of high density that constitute a compact and essentially solid body that absorbs the small impacts that occur when walking, especially in the heel, while the sector of the same corresponding to the plant, of thickness considerably smaller than the heel sector, presents inferiorly a plurality of longitudinal and transverse grooves that determine for said sole a high degree of flexibility and configure grippers on the ground. 2. Sole for footwear, according to claim 1, characterized in that said grooves of the lower face of the plant affect more than half of the thickness thereof. 3. Sole for footwear, according to previous claims, characterized in that the longitudinal grooves are of curved path, of concavity oriented towards the inner edge of the sole and progressively offset inwards from the approach to the toe, while the transverse grooves, also curves, have their concavity oriented backwards and are divergent from the inner edge to the outer edge of the sole, so that in the rear half of the floor they are inclined outward and backward, and in the anterior half inclined outward and forward .