Boots – shoes – and leggings – Boots and shoes – Overshoes
Patent
1988-01-04
1990-02-06
Schroeder, Werner H.
Boots, shoes, and leggings
Boots and shoes
Overshoes
36 75, 36 76, A43B 318
Patent
active
048979350
DESCRIPTION:
BRIEF SUMMARY
The present invention is concerned with the safety of persons at risk of sliding on sloping and/or slippery ground and it relates to a general non-slip means and to its use on soles, pads or non-slip snowshoes.
According to the present invention, a non-slip device fastenable to a shoe by means of straps, the said device comprising essentially a non-slip surface integral with a pad, is defined in general terms in that the non-slip surface is composed of at least one layer of elastic cellular material with open cells and of low density.
Advantageously, the said elastic cellular material will be from the group comprising natural rubber foams, synthetic rubber foams and polyurethane, polyether and polyester foams; by a low density is meant a density comprised within the range of 30 to 40 kg/m.sup.3.
The surface of this layer of material which shall be in contact with the ground shall have been cut in such a way that the orifices of the cells are opposite that on which the device will be used; for example, an outer skin of this layer, usually present when the foam is formed, would do away with the non-slip property; the lower so-called contact layer shall therefore have a spongy structure.
According to a particular embodiment, the non-slip or contact surface is laid against a second layer of cellular material of high elasticity, located between the lower face of the pad and the so-called first layer of material with open cells.
Advantageously, at least one sheet of stretchable cloth, such as nylon fabric, is bonded between the two foam layers, the adhesion of the said sheet at least being greater on the second layer than on the first, as a result of which the cloth sheet both prevents the tearing of the foam layers and allows the first layer to be exchanged.
The above-defined arrangements being applied to a pad of the type in which the non-slip surface is fastened to a rigid pad itself fastenable to the shoe, the pad has a rigid shell shape comprising a recess in the form of the imprint of a shoe; preferably, the pad is fastened to the shoe by means of a pair of components called plates, having an axle through-hole and two elongate slots substantially in the extension of one another and oriented at approximately 130.degree. relative to one another, the axle hole being contained in the angle of the slots and intended for the passage of a screw screwable into inserts arranged in the fore part of the wall of the said imprint and on each side of the latter; also preferably, the location of each plate is defined by a recessed chamber in the wall of the imprint; preferably yet again, the imprint opens onto the outside of the shell in its rear part, the opening being spanned by a bar functioning as a handle.
According to an advantageous embodiment of the strapping, the said strap is a continuous strap, the length of which is such that it allows it to pass over the shoe four times from one side of the foot to the other, passing through each of the slots in the buckles, and behind the heel twice, two buckles respectively ensuring the closing of the strap on itself and its guidance.
According to another embodiment or manner of use of the invention, a non-slip device in the form of a flexible sole fastenable to the shoe is defined, in general terms, in that it is composed of at least one "foam" panel and of means of fastening to a shoe which are integral with the said panel; the said fastening means preferably consist of ties, and the said ties are fixed to the said panel by means of a woven cloth of the gauze type.
According to a more particular embodiment, a sole of the invention incorporates the following elements stacked in succession: a first foam panel, a projecting pair of ties forming loops, each located towards the middle of the sides of the device, the gauze and a second foam layer; the stacked elements can be joined together by sewing as well as by adhesive bonding.
According to other embodiments, the fastening means can consist of self-gripping elements of the type marketed under the trademark of VELCRO, some
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Biefeld Diana L.
Schroeder Werner H.
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