Shoe with combined device for vapor permeation and forced air circulation
A shoe with a combined device for vapor permeation and forced air circulation including an assembly insole which is vapor-permeable or includes through holes, an upper which is fixed to the edges of the insole, a sole arranged below the insole and the edges of the upper, and at least one cavity, which is sealed from the rest provided inside the sole, the cavity having an upper wall which faces the vapor-permeable or perforated assembly insole and including a membrane which is waterproof and permeable to water vapor, the cavity having inlet and outlet ducts for changing the air contained therein.
1. A shoe comprising:
an assembly insole which is vapor-permeable or includes through holes;
an upper which is fixed to the edges of the insole;
a sole below the insole and at the edges of the upper; and
at least one cavity provided inside the sole, said at least one cavity including an upper wall which faces said vapor-permeable or perforated assembly insole, the upper wall being constituted by a membrane which covers and seals the cavity,
wherein the membrane is waterproof and permeable to water vapor,
wherein said at least one cavity includes inlet and outlet ducts for changing the air contained therein, each of the inlet and outlet ducts include one-way valves, and
wherein said at least one cavity includes first and second openings, the first opening configured to allow entry of air into said first cavity and the second opening configured to allow the outflow of air toward the outside.
2. The shoe according to claim 1 , wherein said at least one cavity is provided separately and is inserted in a corresponding hollow of said sole.
3. The shoe according to claim 1 , wherein said at least one cavity is formed directly by a hollow of said sole.
4. The shoe according to claim 1 , wherein said waterproof and vapor-permeable upper membrane is made of polymeric material, or polyurethane, expanded polytetrafluoroethylene or polyester, and is in contact with said insole so as to allow passage of humidity from the insole through said membrane.
5. The shoe according to claim 1 , wherein material which increases the humidity absorption capacity of said membrane, so-called hydrophilic material, and the consequent vapor permeation, is inserted in said at least one cavity, said material being selected among hydrophilic felt, materials with silicon, and open-cell foams.
6. The shoe according to claim 1 , wherein said membrane seals said at least one underlying cavity to ensure air pumping.
7. The shoe according to claim 1 , wherein said membrane and said at least one cavity are arranged at the forefoot.
8. The shoe according to claim 1 , wherein said inlet duct is connected to the outside of the shoe.
9. The shoe according to claim 1 , wherein the inlet duct is connected to the inside of the shoe.
10. The shoe according to claim 1 , wherein the outlet duct is connected to the outside of the shoe.
11. The shoe according to claim 1 , wherein the outlet duct is connected to at least one other cavity, which includes an outlet duct with a one-way valve connected to the outside of the shoe.
12. The shoe according to claim 11 , wherein said at least one other cavity is arranged at the heel.
13. The shoe according to claim 12 , wherein said at least one other cavity is provided separately and is inserted in a corresponding hollow of said sole.
14. The shoe according to claim 12 , wherein said at least one other cavity is formed directly by a hollow of said sole.