Sole including a system of blisters and devices for their deflation

Abstract

This invention relates to a sole for shoes which lodge two or more plastic blisters which can be deflated by the user with a simple rotation of a special device, obtaining every time a different inclination of the foot. This fact can be important for shoes for diabetics and for sportsmen.

1 . A sole including a system of blisters and devices for their deflation, characterized in that one or more plastic blisters are lodged into the sole, these blisters have a leaf spring shape and are produced with a plastic material having a high elastic modulus, each blister has a tube, internally this tube a pneumatic valve is fixed, the valve has a push button, each valve is fixed to a support, over this support a pushing roller with its horn is engaged through a central pin, the push buttons of the valves are settled in order to be pressed one by one by the horn every rotation of the pushing roller, once said push button is pressed the blister is deflated and it is maintained deflated until with another rotation the horn of the pushing roller leaves it and goes to press another valve's push button of the successive blister to be deflated and the previous one becomes inflated. 
     
     
         2 . A sole including a system of blisters and devices for their deflation as defined in  claim 1 , where the plastic blister and its external tube are produced with the process of blowing. 
     
     
         3 . A sole including a system of blisters and devices for their deflation, as defined in  claim 1 , where the plastic blister and its external tube are produced with the process of injection, producing separately two shells and after soldered together. 
     
     
         4 . A sole including a system of blisters and devices for their deflation, as defined in  claim 1 , where the plastic blister and its external tube are four and lodged into the correspondent areas of Inversion, Pronation, Supination and Eversion. 
     
     
         5 . A sole including a system of blisters and devices for their deflation, as defined in  claim 1 , where the pushing roller is a complex formed by the following parts: its central body has a horn whose concave part lodges the head of the push button of the valve, in its centre has a hole for the entering of the centring pin made on the centre of the fixing element, the pin has a cap mushroom shaped which maintains in a firm position the pushing roller but allows its rotation, the fixing element is glued into the hollowed part of the sole or pre-formed into it, a segment of the pushing roller goes out through the slit pre-formed in the correspondent part of the sole, this segment will show to the user the number which corresponds to the deflated blister. 
     
     
         6 . A sole including a system of blisters and devices for their deflation, as defined in  claim 1 , where the system is activated by an engine, whose correspondent circuit works as follows: when a sensor informs a microchip that the shoe is worn and the foot is raised the microchip activates the engine for moving the pushing roller from a blister to the nearest with the same effects mentioned for the manual operation, the power is supplied by a battery which has only to move three-four times a day and for few millimetres the pushing roller, this electric system does not need a switch because the sensor closes the circuit when the shoe is not worn and put in motion it only when the foot is raised. 
     
     
         7 . A sole including a system of blisters and devices for their deflation, as defined in  claim 1 , where the blisters are only two lodged into the plantar area and the correspondent tubes including their pneumatic valves are addressed to the external side of the sole, their push button is pressed manually by the user.