Inner sole

Abstract

An inner sole to be laid on an insole of a shoe can have a body made of flexible material and formed therein with a liquid containing space for sealingly and flowably containing liquid therein. The inner sole can include dam portions for dividing the liquid containing space into a toe region, a heel region and a middle region therebetween, and orifices for communicating the liquid between mutually adjacent regions at a predetermined flowing rate.

1 . An inner sole to be laid on an insole of a shoe having a body made of flexible material and formed therein with a liquid containing space for sealingly and flowably containing liquid therein, wherein the inner sole comprises dam portions dividing the liquid containing space into a toe region, a heel region and a middle region therebetween, and orifices for communicating the liquid between mutually adjacent regions at a predetermined flowing rate.  
     
     
         2 . An inner sole to be laid on an insole of a shoe of  claim 1  wherein each of the dam portions is formed with a convex configuration toward the toe region from the heel region.  
     
     
         3 . An inner sole to be laid on an insole of a shoe of  claim 1  further comprising a second dam portion for additionally dividing the toe region into a forward toe region and a rearward toe region, and an orifice formed in the second dam portion.  
     
     
         4 . An inner sole to be laid on an insole of a shoe of  claim 2  further comprising a second dam portion for additionally dividing the toe region into a forward toe region and a rearward toe region, and an orifice formed in the second dam portion.  
     
     
         5 . An inner sole to be laid on an insole of a shoe of  claim 1  further comprising a spread portion laterally extended from the middle region to a position corresponding to a shank portion of the shoe on which the inner sole is laid, a third dam portion partitioning the spread portion from the middle region, and orifices arranged at either ends of the third dam portion.  
     
     
         6 . An inner sole to be laid on an insole of a shoe of  claim 2  further comprising a spread portion laterally extended from the middle region to a position corresponding to a shank portion of the shoe on which the inner sole is laid, a third dam portion partitioning the spread portion from the middle region, and orifices arranged at either ends of the third dam portion.  
     
     
         7 . An inner sole to be laid on an insole of a shoe of  claim 3  further comprising a spread portion laterally extended from the middle region to a position corresponding to a shank portion of the shoe on which the inner sole is laid, a third dam portion partitioning the spread portion from the middle region, and orifices arranged at either ends of the third dam portion.  
     
     
         8 . An inner sole to be laid on an insole of a shoe of  claim 4  further comprising a spread portion laterally extended from the middle region to a position corresponding to a shank portion of the shoe on which the inner sole is laid, a third dam portion partitioning the spread portion from the middle region, and orifices arranged at either ends of the third dam portion.  
     
     
         9 . An inner sole to be laid on an insole of a shoe of  claim 1  wherein the liquid is water (W).  
     
     
         10 . An inner sole to be laid on an insole of a shoe of  claim 2  wherein the liquid is water (W).  
     
     
         11 . An inner sole to be laid on an insole of a shoe of  claim 3  wherein the liquid is water (W).  
     
     
         12 . An inner sole for a shoe, comprising a body made of flexible material, the body including a liquid containing space and a liquid disposed in the liquid containing space, the inner sole further comprising a toe dam portion and a heel dam portion dividing the liquid containing space into at least a toe region, a heel region and a middle region therebetween, the toe dam portion and the heel dam portion being configured to allow the liquid in the liquid containing space to flow through the toe and heel dam portions at predetermined flow rates.  
     
     
         13 . The inner sole according to  claim 12 , wherein the heel dam portion is configured to allow the liquid to flow through the heel dam portion at a first flow rate in a direction from the heel region toward to the middle region and at a second flow rate in a direction from the middle region toward the heel region, the second flow rate being larger than the first flow rate.  
     
     
         14 . The inner sole according to  claim 13 , wherein the heel dam portion is convex in a direction toward the middle region.  
     
     
         15 . The inner sole according to  claim 12 , wherein the toe dam portion is configured to allow the liquid to flow through the toe dam portion at a first flow rate in a direction from the middle region toward to the toe region and at a second flow rate in a direction from the toe region toward the middle region, the second flow rate being larger than the first flow rate.  
     
     
         16 . The inner sole according to  claim 15 , wherein the toe dam portion is convex in a direction toward the toe region.  
     
     
         17 . The inner sole according to  claim 12 , wherein both the toe and heel dam portions are configured to allow the liquid in the liquid containing space to flow through the toe and heel dam portions faster in a first direction than in a second direction opposite the first direction.  
     
     
         18 . An inner sole for a shoe, comprising a body made of flexible material, the body including a liquid containing space and a liquid disposed in the liquid containing space, the inner sole further comprising a toe dam portion and a heel dam portion dividing the liquid containing space into at least a toe region, a heel region and a middle region therebetween, the toe dam portion and the heel dam including means for controlling flow rate of the liquid through the toe and heel dam portions.  
     
     
         19 . The inner sole according to  claim 18 , wherein the means for controlling includes means for causing a flow rate in a direction extending from the toe region toward the heel region to be different from a flow rate in a direction from the heel region toward the toe region.  
     
     
         20 . The inner sole according to  claim 18 , wherein the means for causing includes means for making a flow rate in a direction extending from the toe region toward the heel region to be higher than a flow rate in a direction from the heel region toward the toe region.