Claims
- 1. In combination, (A) a cryogenic liquid storage vessel comprising a load-bearing wall, a primary barrier layer of impermeable polyurethane foam, a circulatory system disposed therebetween defined by a network of cells having side walls which are generally in lateral orientation to the primary barrier layer and the load-bearing wall, at least some of said side walls having apertures therein thereby providing means whereby each cell is in communication with at least one adjacent cell in a manner defining a continuous controlled circulatory path passing through each cell of said network, and a secondary barrier layer of impermeable polyurethane foam partially filling the cells in the region between the apertures and adjacent the load-bearing wall, and (B) means for circulating a fluid through said circulatory system.
- 2. The invention of claim 1 wherein the network of cells is a honeycomb construction and those portions of the cell side walls in the region of the primary barrier layer are embedded in the impermeable polyurethane foam forming that layer.
- 3. The invention of claim 2 wherein the primary barrier layer contains a reinforcement.
- 4. The invention of claim 3 wherein the reinforcement is scrim, a woven fabric, or fibers.
Parent Case Info
This is a division, of application Ser. No. 428,554, filed 12-26-73, now U.S. Pat. No. 3,895,152.
US Referenced Citations (7)
Foreign Referenced Citations (1)
Number |
Date |
Country |
606,284 |
Aug 1948 |
UK |
Divisions (1)
|
Number |
Date |
Country |
Parent |
428554 |
Dec 1973 |
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