Article of footwear
US5893219A · kind A · utility
100Cited by
41References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 6, 1997 |
| Grant date | Apr 13, 1999 |
| Priority date | — |
| Expiry date | Aug 6, 2017 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA43B23/029
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
The present invention is directed to an article of footwear including an upper, a sole and a pumping chamber for producing a continuous supply of fluid. The sole includes a midsole and an outsole. The pumping chamber is formed between the bottom surface of the midsole and the upper surface of the outsole and includes at least one inlet and at least one outlet. Movement of the wearer's foot causes fluid to be drawn into and expelled from the pumping chamber. The fluid produced by the pumping chamber may be used to inflate an expandable bladder or to provide ventilation to the wearer's foot.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.