24-01-2013 дата публикации
Номер: US20130022702A1
A collapsible bladder has flexible outer walls and at least one strut inside the enclosure. The strut is connected to the outer walls and controls the shape into which the enclosure may be collapsed. 1. A collapsible bladder , comprising:flexible outer walls forming an enclosure; andat least one strut inside the enclosure for controlling the shape into which the enclosure may be collapsed.2. The collapsible bladder of claim 1 , wherein:the flexible outer walls form corners, andthe at least one strut is connected to one of the corners for restraining the one corner against outward displacement.3. The collapsible bladder of claim 1 , wherein the at least one strut is flexible.4. The collapsible bladder of claim 1 , further comprising:a plurality of struts each having first and second ends, andwherein the first end of each of the struts is connected to one of the walls and the struts are joined together at their second ends.5. The collapsible bladder of claim 4 , wherein:the flexible outer walls form a plurality of corners, andeach of the struts has its first end connected to one of the corners.6. The collapsible bladder of claim 4 , wherein the struts intersect each other and are joined together.7. The collapsible bladder of claim 1 , wherein:the flexible outer walls form at least one corner,the at least one corner includes a pressure bulb, andthe at least one strut is connected to the at least one corner in the area of the pressure bulb.8. The collapsible bladder of claim 7 , wherein:the corner has an outer surface radius, andthe pressure bulb has a radius generally matching the surface area of the outer surface radius of the corner.9. The collapsible bladder of claim 1 , further comprising:a first plurality of the struts connected together in a ring joined to the walls, anda second plurality of the struts disposed within and connected to the ring.10. The collapsible bladder of claim 7 , wherein:adjacent ones of the flexible outer walls form corners, andthe at least ...
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