Patent ID: 7331121

Claim:
A shoe sole ( 1 ) comprising: a chamber ( 11 ), a pumping device ( 12 ) and a connection tube ( 13 ) which is in communication with the chamber ( 11 ) and the pumping device ( 12 ), the connection tube ( 13 ) located longitudinally in the shoe sole and an end tube ( 130 ) connected transversely to a distal end of the connection tube ( 13 ), a first valve ( 131 ) received in the connection tube ( 13 ) so as to prevent air from flowing back into the pumping device ( 12 ), an inlet tube ( 121 ) extending from the pumping device ( 12 ) so as to introduce air from outside into the pumping device ( 12 ), an outlet tube ( 112 ) extending from the pumping device ( 12 ) and located in the chamber ( 11 ) so as to introduce air from the pumping device ( 12 ) into the chamber ( 11 ), a plurality of outlets ( 133 ) defined in the end tube ( 130 ), the outlets ( 133 ) located at a front section of the sole and adapted to be located beneath toes of wearer's foot, the connection tube ( 13 ) having a neck portion ( 132 ) which defines a narrowed path in the connection tube ( 13 ), the neck portion ( 132 ) located between the pumping device ( 12 ) and the outlets ( 133 ).