Ventilated insole

Abstract

An insole includes an insole pad which has a toe section, a heel section and a shank section and which is constituted of top and bottom sheets heat sealed together. The top and bottom sheets confine therebetween a first air chamber in the toe section, a second air chamber in the heel section and an air passage in the shank section. The air passage is relatively narrower than the first and second air chambers. A compressible resilient member is disposed in the second air chamber so that, when the heel section is compressed and released, the second air chamber can act as an air pump to draw air into the first air chamber and force the air out of the first air chamber through vent holes formed in the toe section.

I claim:  
     
         1 . An insole comprising 
 an insole pad having a heel section, a toe section, and a shank section between said heel and toe sections, said insole pad being constituted of top and bottom sheets which are laid one over the other and which are heat sealed together,    said top and bottom sheets confining therebetween a first air chamber at said toe section, a second air chamber at said heel section, and an elongated and narrow air passage extending in said shank section and connected fluidly to said first and second air chambers, said air passage being narrower than said first and second air chambers,    said insole pad further having a resilient member disposed in said second air chamber, said insole pad being compressible when said heel section is compressed and expandable to return said heel section to an uncompressed original state,    said top sheet having vent holes formed in said toe section.    
     
     
         2 . The insole as claimed in  claim 1 , wherein said resilient member is configured as a resilient block disposed in said second air chamber and formed with a plurality of through-holes extending along a direction from said top sheet to bottom sheet.  
     
     
         3 . The insole as claimed in  claim 1 , wherein said top sheet further has a plurality of protrusions projecting downward and toward said bottom sheet.