Pressure vessel
AssigneeE. I. Du Pont de Nemours and Company
InventorsBarbara Klimowicz O'Rourke, Mark Allan Lamontia, Joseph Herbert Mason
Life of this patent
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Abstract
An improved pressure vessel comprising a polymer inner bladder inside a containment envelope is provided which is well-suited for transporting hazardous materials therewithin via air transport. The improved pressure vessel features a seal placed over the closure of the containment envelope which has been found to suppress failure of the pressure vessel by creep which occurs as a result of the high internal pressure that the pressure vessel experiences at high altitudes. The seal also serves to indicate whether or not the containment envelope has been tampered with after having been sealed.
Claims10
An improved pressure vessel, comprising:
- a flexible, air permeable, liquid permeable, containment envelope having an interior cavity and an access opening closed by a closure and forming a seam;
- a separate, flexible, air tight, liquid impervious, inner bladder having an interior cavity and an access opening, the inner bladder being disposed within the interior cavity of the containment envelope in an unexpanded state, wherein the inner bladder in a fully expanded condition outside of the containment envelope is larger than the interior cavity of the containment envelope;
- and
- a seal comprising a piece of flexible sheet material adhered to the exterior of the containment envelope over the seam.
Dependencies are inferred from the claim text.