Balance-Improving Liquid-Filled Insole for Use in Therapeutics, Rehabilitation, Standing and Walking Work and Sports
AssigneeMEDICOVI ApS
InventorPeter Vindriis
Life of this patent
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Abstract
An insole made of two membrane foils, between which a liquid is provided. The membrane foils have very little elasticity and high stiffness to respond quickly to load by pushing liquid quickly from an area under the foot to another area of the foot, by which the balance response is made faster for a person who uses such insoles. Especially in the field of multiple sclerosis, post-stroke rehabilitation, golf and race have such insoles have proven to be very advantageous.
Claims23
An insole for footwear, wherein said insole comprises a lower membrane foil (3.2) and an upper membrane foil (3.3) mutually joined along a closed path so as to form an enclosure (3.5), which is filled with water;
- wherein only the upper membrane foil, or both the upper membrane foil and the lower membrane foil, is made of a plastic material with a membrane foil stiffness defined by a deflection within a deflection interval in a bending measurement as follows:
- the bending measurement is being made with a piece of 10 mm×25 mm of the plastic material placed centrally resting on two parallel rails (2.2) having a mutual distance of 15 mm, and wherein a force is applied onto the piece at 25° C., the force corresponding to a weight of 25 g midway between the two parallel rails (2.2) so as to cause a deflection after a constant weight impact for 2.5 minutes, the deflection of which is then measured;
- wherein the deflection interval is 0.02 to 1.95 mm.
An insole according to claim 4, wherein the upper membrane foil (3.3) is a laminate (16.3) of a first polymer foil (16.1) that is high-frequency weldable, and a second polymer foil (16.2);
- wherein the stiffness of the second polymer foil (16.2) is higher than the stiffness of the first polymer foil (16.1);
- wherein the first polymer foil (16.1) is oriented towards the enclosure (3.5) with the water;
- wherein the lower membrane foil (3.2) also comprises a high-frequency weldable polymer foil that is oriented towards the enclosure (3.5) and that is joined together by high-frequency welding with the first polymer foil (16.1) of the upper membrane foil (16.3) along the edge (3.4) to form the enclosure (3.5).
An insole according to claim 7, wherein the second polymer foil (16.2) is made of polyethylene vinyl acetate (PEVA), polyethylene (PE), polypropylene (PP), oriented polyamide (OPA) or polyamide (PA) or a mixture thereof.
Dependencies are inferred from the claim text.