Kinetic energy returning shoe
US4858338A · kind A · utility
31Cited by
7References
24Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 18, 1988 |
| Grant date | Aug 22, 1989 |
| Priority date | — |
| Expiry date | May 18, 2008 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA43B13/187
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
An insert for a shoe sole is provided which includes a strip made of an elastic material disposed between an outer sole portion and an upper sole portion of the sole of a shoe. The strip extends from the outer heel area of the shoe to the border of the large toe area of the shoe. The strip forms a rocker bottom which cradles the first metatarsal head of the foot of the wearer. The roll point of the rocker bottom is disposed in a range of from the toe break of the wearer to approximately 2.5 centimeters behind the toe break of the wearer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.