Title: Penetration resistant barrier

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.

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Inventors: Hoover, William R. (Albuquerque, NM, US)
Mead, Keith E. (Albuquerque, NM, US)
Street, Henry K. (Albuquerque, NM, US)

Application Number: 657518
Filing Date: 1976-02-12
Publication_date: 1977-09-20
Assignee: The United States of America as represented by the United States Energy (Washington, DC)
Primary Class(es): 428/332 109/80, 109/82, 428/417, 428/447, 428/450, 428/911
Other Classes:
US Patent Ref:

2279110	Apr, 1942	Collins	89/36.
2381779	Aug, 1945	Scott	109/80.
3220878	Nov, 1965	Pines	428/413.
3408966	Nov, 1968	Gartner	109/80.

Other Refs:
Primary Examiner: Lesmes, George F.
Assistant Examiner: Thibodeau, P. J.
Attorney: Carlson; Dean E., King; Dudley W., Weig; Robert W.