Footwear construction and related method of manufacture
View Patent ↗An article of footwear including a shell that provides stability. The shell can include a heel cup and a wall extending forward of the heel cup and around the periphery of the forefoot, returning to the heel cup. The shell can also define a hole in the forefoot region. A cushion in the form of a midsole can be secured in the shell, with a portion extending at least partially through the shell hole. An upper can be secured to the shell with stitching passing through the upper and the shell wall in at least the forefoot region; and rearward of the stitching, the upper can be secured with cement and/or adhesives to the shell and/or the midsole. The footwear provides comfort and stability, for example toe-to-heel and lateral stability, especially during toe-off, i.e., the propulsion portion of a gait.
1. A footwear construction including a forefoot region and a heel region comprising:
an upper including a peripheral allowance;
a one-piece, unitary, substantially rigid shell including a heel cup, a forefoot portion and a periphery, the heel cup including a base plate extending toward the forefoot portion, the forefoot portion including a wall extending generally upwardly in relation to the base plate, the wall further extending around the periphery in at least the forefoot portion so that the wall and heel cup cooperate to form an upwardly opening recess, the shell defining a hole in the forefoot portion, the hole terminating short of the heel portion;
a cushioning material positioned in the upwardly opening recess of the shell, the cushioning material extending at least partially into the hole; and
an outsole secured to the shell,
wherein the peripheral allowance is joined with stitching to the shell in the forefoot region, the stitching terminating short of the heel region;
wherein the upper is adhered to at least one of the shell and the cushioning material in the heel region.
2. The footwear construction of claim 1 wherein the outsole includes a first outsole component positioned in the heel region and a second outsole component in at least the forefoot region, the second component separated from the first component by a distance.
3. The footwear construction of claim 1 wherein the shell defines at least one recess within which the outsole is secured to the shell.
4. The footwear construction of claim 1 wherein the outsole defines a plurality of apertures.
5. The footwear construction of claim 1 wherein the cushioning material extends through the hole and at least partially into the apertures defined by the outsole.
6. The footwear construction of claim 1 wherein the shell defines a stitching groove in which the stitching is positioned.
7. The footwear construction of claim 1 wherein the cushioning material is positioned in the upwardly opening recess of the shell so that a portion of the wall remains exposed in the forefoot region, wherein the stitching is stitched through the exposed portion of the wall.
8. A footwear construction including a forefoot region, and arch region and a heel region comprising:
an upper including a peripheral allowance;
a shell including a base plate and a wall extending substantially upwardly from the base plate around a periphery having a shape of a wearer's foot, the wall and base plate cooperating to define an upwardly opening recess, the base plate defining a base plate hole in substantially only at least one of the arch region and the forefoot region;
an outsole secured to the shell;
a cushion positioned at least partially within the shell, with at least a portion of the cushion remaining above the base plate hole, adjacent the base plate, and another portion extending through the hole; and
stitching that passes through the peripheral allowance and the shell to secure the shell and the peripheral allowance to one another.
9. The footwear construction of claim 8 wherein the wall and the base plate cooperate to define a heel cup in the heel region.
10. The footwear construction of claim 8 wherein the cushion includes at least one protrusion that extends through the hole.
11. The footwear construction of claim 8 wherein the outsole defines at least one aperture.
12. The footwear construction of claim 8 wherein the cushion extends through the hole and at least partially into an aperture defined by the outsole.
13. The footwear construction of claim 8 wherein the shell is one-piece, substantially rigid and constructed from thermoplastic polyurethane.