Patent ID: 7314072

Claim:
A self-inflating vessel, comprising: a) a generally circular vessel wall portion being inwardly deformable; b) a main chamber within the vessel; c) a substantially planar rigid airtight wall located adjacent the vessel wall and forming a chord with respect to the generally circular vessel wall portion, wherein a segment bounded by an arc of the generally circular vessel wall portion and the substantially planar rigid airtight wall forms a compressible pump chamber within the vessel and having a first volume when the vessel wall portion is undeformed and a second lesser volume when the vessel wall portion is deformed inwardly; d) first valving allowing the one-way intake of fluid from the exterior of the vessel into the compressible pump chamber when the pump chamber is at the first volume; and e) second valving allowing the one-way outflow of compressible fluid from the pump chamber into the main chamber when the pump chamber is at the second volume.