Fluid flow system for spring-cushioned shoe

A shoe comprising:

• a shoe sole including an outer sole, an inner sole, and a mid-sole disposed above the outer sole and below the inner sole, the middle sole defining a first vacuity in the heel region of the mid-sole, and a second vacuity in the ball region of the mid-sole;
• a first spring disposed within the first vacuity, and a second spring disposed within the second vacuity;
• and
• a fluid channel connecting the first vacuity to the second vacuity, the fluid channel
• allowing movement of fluid between the first and second vacuities.

A shoe sole assembly comprising:

• a compressible material defining a vacuity;
• a spring disposed within the vacuity;
• and
• a fluid passageway in fluid communication with the vacuity, the passageway configured to allow evacuation of fluid from the vacuity upon compression of the vacuity.

A shoe sole assembly comprising:

• a sole member defining a vacuity;
• a spring disposed within the vacuity;
• and
• means for allowing evacuation of fluid from the vacuity upon compression of the vacuity.

A method of manufacturing a spring-cushioned shoe sole assembly, the method comprising:

• forming at least a portion of the sole assembly from a compressible material, the portion defining a vacuity;
• disposing a spring within the vacuity;
• and
• forming a fluid passageway in fluid communication with the vacuity, the passageway allowing fluid to escape from the vacuity upon compression of the vacuity.