Patent ID: 7043857

Claim:
A shoe comprising: a bottom; a major longitudinal axis; an upper having an arch region and a heel region; a rear sole including an outsole and a midsole, the rear sole being below at least a portion of the heel region of the upper, the rear sole having a forward portion and an opposite rearward portion; a plate having an upper surface, a lower surface, an interior portion and peripheral portions and positioned between at least a portion of the outsole of the rear sole and at least a portion of the heel region of the upper, at least one of the peripheral portions of the plate being proximate at least one of a medial side of the shoe, a lateral side of the shoe and a rear of the shoe, the interior portion of the plate being positioned over a void and exposed to the void, at least a portion of the plate capable of being deflected in a direction substantially perpendicular to the major longitudinal axis of the shoe; at least one opening in the shoe, the opening being in air communication with the void to expose the interior portion of the plate from outside the shoe through the opening and the void; an arch bridge integral with the plate extending from a position proximate a forward portion of the plate, forward beneath at least a portion of the arch region of the upper; and a substantially air-tight enclosure located at least in part between a portion of the upper and a portion of the bottom of the shoe, the air-tight enclosure having a top, a bottom, a vertical central axis passing through the top and the bottom of the air-tight enclosure, an exterior surface, and an interior chamber having a height parallel with the vertical central axis, the interior chamber having a top portion, a bottom portion, and a middle portion connecting the top and bottom portions, the interior chamber having a transverse-cross-sectional dimension in a plane generally perpendicular to the vertical central axis that is variable in the middle portion along at least a portion of the height of the interior chamber, at least a portion of the exterior surface being exposed to and visible from at least one of the medial side of the shoe, the lateral side of the shoe and the rear of the shoe.