Patent ID: 7395615

Claim:
A pumping device of a shoe ( 100 ) comprising: a cushion body ( 110 ) formed inside a sole of the shoe ( 110 ) and having front and back air chambers ( 120 and 130 ) formed therein in such a manner as to be disposed at the front and back portions thereof; an automatic pump ( 140 ) mounted adjacent to the back air chamber ( 130 ) in such a manner as to communicate with the back air chamber ( 130 ) and having a height (H 2 ) higher than a height (H 1 ) of the back air chamber ( 130 ); a suction valve ( 150 ) and a check valve ( 160 ) mounted at the front and back sides of the automatic pump ( 140 ) respectively; and a pressure adjusting valve ( 170 ) formed at a connecting valve ( 125 ) for connecting the back air chamber ( 130 ) with the front air chamber ( 120 ).