Patent ID: 6247248
Filing Date: 2001-06-19
Classification: A43B

Abstract:
A footwear ventilation system comprising:(a) a lasting board; and(b) a ventilation unit comprising:(i) an inflow valve allowing one-way airflow;(ii) a displacement chamber of essentially a wedge shape, said displacement chamber compressing when under a force but expanding to the wedge shape when the force is removed;(iii) a plurality of tubular channels connecting the displacement chamber to the inflow valve; and(iv) an outflow valve connected to the displacement chamber, said outflow valve allowing one-way airflow,wherein the lasting board is placed under a shoe upper and on top of the ventilation unit and the ventilation unit is placed on top of a shoe midsole having a forefoot section and a heel section,and wherein the ventilation unit is placed on the shoe midsole with the inflow valve of the ventilation unit over the forefoot section of the shoe midsole and the displacement chamber of the ventilation unit over the heel section of the shoe midsole.