Sole with V-oriented flex grooves
US4562651A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 8, 1983 |
| Grant date | Jan 7, 1986 |
| Priority date | — |
| Expiry date | Nov 8, 2003 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA43B13/22
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
An improved sole for use with footwear is disclosed. The sole includes at least one layer of material which is adapted to be attached to an upper of the footwear. A distal flex groove is formed in the sole and is coextensive with a medial metatarsal-phalanges line which extends between the first and second metatarsal-phalanges joints. A proximal flex groove is also formed in the sole and extends substantially parallel to a lateral metatarsal-phalanges line which extends along the second through fifth metatarsal-phalanges joints. The proximal and distal grooves join on another at the medial edge of the sole adjacent the first metatarsal-phalanges joint.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.