Advanced torque stability footbed
The present invention provides a footbed made of cotton fabric, polyurethane, ethyl vinyl acetate, polyester and thermoplastic gel rubber. The invention also provides footwear which includes a footbed as described herein.
1. A footbed, comprising:
a layered footbed body comprising at least a forefoot region and a heel region, wherein the forefoot region and the heel region each comprise a plurality of layers, with the plurality of layers comprising:
a surface layer positioned for contact with a bottom surface of a user's foot when an article of footwear containing the footbed is worn on the user's foot;
a layer of ethyl vinyl acetate positioned beneath the surface layer and configured to provide cushioning to the user's foot when an article of footwear containing the footbed is worn on the user's foot;
a layer of polyurethane configured to provide shock attenuation and compression resistance when an article of footwear containing the footbed is worn on the user's foot; and
a pad of thermoplastic rubber gel positioned to provide cushioning and rebound to a metatarsal region of the user's foot when an article of footwear containing the footbed is worn on the user's foot; and
wherein the heel region further comprises a heel cup shaped to provide torsional stability and cuboid support to the user's foot when an article of footwear containing the footbed is worn on the user's foot.
2. The footbed of claim 1 , wherein the layer of polyurethane at least partially covers the layer of ethyl vinyl acetate.
3. The footbed of claim 1 , wherein the layer of polyurethane is coextensive with the layer of ethyl vinyl acetate.
4. The footbed of claim 1 , wherein the layer of polyurethane is in contact with the layer of ethyl vinyl acetate.
5. The footbed of claim 1 , wherein the surface layer is a fabric layer.
6. The footbed of claim 5 , wherein the surface layer is formed from cotton.
7. The footbed of claim 1 , wherein the layer of polyurethane and the layer of ethyl vinyl acetate each include a cavity into which the pad extends.
8. The footbed of claim 1 , further comprised of punched perfs extending through the plurality of layers.
9. The footbed of claim 8 , wherein the footbed body includes a shank region between the forefoot region and the heel region, and further wherein the punched perfs are in the shank region of the footbed.
10. The footbed of claim 1 , wherein the layer of polyurethane has a thickness between about 0.5 mm and about 7.5 mm.
11. The footbed of claim 1 , wherein the layer of polyurethane has a hardness of 15-30 C on the Asker C scale.
12. The footbed of claim 1 , wherein the layer of ethyl vinyl acetate has a thickness of between about 1 mm and about 6 mm.
13. The footbed of claim 1 , wherein the layer of ethyl vinyl acetate has a hardness of 25-40 C on the Asker C scale.
14. The footbed of claim 1 , wherein the surface layer has a thickness of between about 0.6 mm and about 1.2 mm.
15. The footbed of claim 1 , wherein the pad of thermoplastic gel has a thickness of between about 2.5 mm and about 3.5 mm.
16. The footbed of claim 1 , wherein the pad of thermoplastic gel has a hardness of 15-30 C on the Asker C scale.
17. The footbed of claim 1 , wherein the heel cup extends beneath the plurality of layers.
18. The footbed of claim 1 , wherein the heel cup has a thickness of about 0.5 mm and about 1.5 mm.
19. The footbed of claim 1 , wherein the heel cup has a hardness of 90-100 A on the Shore A scale.
20. The footbed of claim 1 , wherein the plurality of layers are co-molded layers.
21. An article of footwear comprising the footbed of claim 1 .