Patent ID: 6813790
Filing Date: 2004-11-09
Classification: A47C,A61G

Abstract:
A cushioning device comprising:a first fluid bladder support structure having a first surface and an opposing second surface; a second fluid bladder support structure having a first surface and an opposing second surface, wherein the first and second fluid bladder support structures deform under application of a load and reform upon removal of the load; at least one fluid accumulation reservoir; a first conduit interconnecting the first fluid bladder support structure in fluid communication with the second fluid bladder support structure, wherein the first conduit comprises a first one-way valve which permits fluid flow from the first fluid bladder support structure to the second fluid bladder support structure; a second conduit interconnecting the second fluid bladder support structure in fluid communication with the at least one fluid accumulation reservoir, wherein the second conduit comprises a second one-way valve which permits fluid flow from the second fluid bladder support structure to the at least one fluid accumulation reservoir and wherein the second one-way valve is a pressure relief valve; and a third conduit interconnecting the at least one fluid accumulation reservoir in fluid communication with the first fluid bladder support structure, wherein the third conduit comprises a third one-way valve which permits fluid flow from the at least one fluid accumulation reservoir to the first fluid bladder support structure.