Monolithic outsole
US4956927A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 1988 |
| Grant date | Sep 18, 1990 |
| Priority date | — |
| Expiry date | Dec 20, 2008 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA43B13/14
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
An outsole construction for a shoe which provides all midsole and outsole functions with a single homogeneous moldable material thorough geometry alone is disclosed. The invention employs cut-out geometry for engineering various characteristics into an outsole of a uniform, monolithic material. Such characteristics are obtained by removing material or reinforcing the material so that it functions as if it had different densities. The invention is based on the principle of minimum sufficient thickness in order to maintain the foot as close to the ground as possible. Energy absorption/cushioning is achieved in the invention by the following features: (1) a series of transverse slots along the lateral border to provide cushion conformability to the lower foot column; (2) an array of compression columns or holes in the heel region to accept the known pressure distributions; (3) an array of small holes in the ball region to add both cushioning and flexibility; (4) a raised heel cup to constrain the heel fat pad expansion during impact and enhance the natural shock absorbing characteristics of the foot; and (5) relief of the rear lateral heel border to dynamically smooth and cushion init…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.