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US 4,049,864 AGranted
Penetration resistant barrier
AssigneeThe United States of America as represented by the United States Energy Research and Development Administration
InventorsWilliam R. Hoover, Keith E. Mead, Henry K. Street
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Abstract
The disclosure relates to a barrier for resisting penetration by such as hand tools and oxy-acetylene cutting torches. The barrier comprises a layer of firebrick, which is preferably epoxy impregnated sandwiched between inner and outer layers of steel. Between the firebrick and steel are layers of resilient rubber-like filler.
Claims3
A barrier for resisting penetration by cutting torch and hand tools comprising:
- an outer plate of mild steel from about 50 mils to about 1 inch thick;
- a first layer of silicone rubber from about 1/8 inch to about 1/2 inch thick;
- a layer of epoxy resin impregnated ceramic firebrick up to about 1 foot thick;
- a second layer of silicone rubber from about 1/8 inch to about 1/2 inch thick, said first and second layers of silicone rubber sandwiching said ceramic firebrick layer between them;
- and
- an inner plate of mild steel from about 50 mils to about 1 inch thick, said inner and outer plates of steel sandwiching between them said first mentioned sandwiched firebrick and silicone rubber layers.
3 more elements
Dependencies are inferred from the claim text.