CPC A43B 13/203 (2013.01) [A43B 13/186 (2013.01); A43B 13/189 (2013.01); A43B 13/20 (2013.01); A43B 13/206 (2013.01); A43B 21/28 (2013.01); A43B 23/029 (2013.01)] | 17 Claims |
1. An article of footwear comprising:
an upper;
a sole structure engaged with the upper; and
an adaptive fluid system, comprising:
a fluid chamber disposed in the sole structure;
a pump configured to deliver fluid to the fluid chamber, wherein the pump is an internal pump disposed in an insole of the article of footwear;
an adjustable pressure regulating valve disposed in the article of footwear and including a fluid inlet disposed downstream of the pump and a fluid outlet disposed upstream of the fluid chamber;
a first one way valve disposed between the fluid outlet of the pressure regulating valve and a fluid inlet of the fluid chamber;
a second one way valve disposed between the internal pump and the fluid inlet of the adjustable pressure regulating valve; and
wherein the first one way valve allows fluid to flow from the adjustable pressure regulating valve to the fluid chamber and wherein the first one way valve prevents fluid flow from the fluid chamber to the adjustable pressure regulating valve, and
wherein the second one way valve allows fluid flow from the internal pump to the adjustable pressure regulating valve and wherein the second one way valve prevents fluid from flowing from the adjustable pressure regulating valve to the internal pump.
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