Shoe insert construction
First Claim
Patent Images
1. A shoe insert comprising:
- a base layer of a relatively resilient material, a foam layer disposed over the base layer, a fabric disposed over the foam layer, means integrally forming the base layer, foam layer and fabric into a sheet tri-laminate, a support layer disposed only at the heel area of the insert and of a rigid material of higher density than that of the tri-laminate, and means attaching and forming the tri-laminate with the support layer, said support layer being disposed under said base layer, said base and foam layers each being of comparable thickness and each substantially thicker than the fabric layer, said base layer and support layer both constructed of polyurethane foam material, said base layer and foam layer having substantially comparable densities, and said foam layer having a density substantially less than the density of the support layer, said support layer being formed of a compressed polyurethane foam to obtain greater density and thus greater rigidity in comparison to that of the foam layer.
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Abstract
A shoe insert for use with a shoe or sneaker to reduce impact to the foot and to absorb shock and attenuate shock to the foot. The insert is comprised of a base layer of a relatively resilient material, a foam layer disposed over the base layer, a fabric disposed over the foam layer and means integrally forming the base layer, foam layer and fabric into a sheet tri-laminate. A support layer is disposed only at the heel area and is constructed of a rigid material of higher density than that of the tri-laminate. Means are provided for attaching and forming the tri-laminate with the support layer.
57 Citations
9 Claims
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1. A shoe insert comprising:
- a base layer of a relatively resilient material, a foam layer disposed over the base layer, a fabric disposed over the foam layer, means integrally forming the base layer, foam layer and fabric into a sheet tri-laminate, a support layer disposed only at the heel area of the insert and of a rigid material of higher density than that of the tri-laminate, and means attaching and forming the tri-laminate with the support layer, said support layer being disposed under said base layer, said base and foam layers each being of comparable thickness and each substantially thicker than the fabric layer, said base layer and support layer both constructed of polyurethane foam material, said base layer and foam layer having substantially comparable densities, and said foam layer having a density substantially less than the density of the support layer, said support layer being formed of a compressed polyurethane foam to obtain greater density and thus greater rigidity in comparison to that of the foam layer.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
Specification