Patent ID: 7707744
Filing Date: 2010-05-04
Classification: A43B,B29C,B29D,B29L,Y10T

Abstract:
1. A sealed chamber formed from a polymer material and enclosing a fluid, the chamber comprising: a first subchamber having at least two outwardly-extending first lobes, the first subchamber having a first volume; a second subchamber having at least two outwardly-extending second lobes, the second subchamber having a second volume that is less than the first volume; and a third subchamber having a third volume that is less than the second volume, each of the first subchamber, the second subchamber, and the third subchamber having a first surface and an opposite second surface devoid of internal connections that secure interior portions of the first surface to interior portions of the second surface, and a pressure of the fluid being substantially equal to an ambient pressure of air surrounding the chamber.