Apparatus and method for controlling outward movement of flexible walls defining an enclosed chamber of a device inflatable by air or other compressible fluid, the outward movement occurring in response to application of an external force over portions of a flexible wall to decrease the volume and increase...http://www.google.fr/patents/US5608931?utm_source=gb-gplus-shareBrevet US5608931 - Springlike couplings of flexible walls of inflatable body supports
Springlike couplings of flexible walls of inflatable body supports
