Back to results
US 4,455,801 AGranted
Light weight vault wall
AssigneeCanadian Patents and Development Limited
InventorW. R. Merritt
Life of this patent
Estimating the term…
Abstract
A light weight composite panel for use in vaults or strong rooms, having a foamed plastic core, metal mesh embedded in the major faces of the core, a layer of wood on each face of the plastic core, and a sheet metal skin covering the layers of wood. An inner one of the sheet metal skins is preferably a heat conductive metal, such as aluminum.
Claims6
A strong wall for delaying unauthorized access to the interior of a vault or other structure constructed of said strong walls, said strong walls comprising:
- a foamed polymeric resin core capable of bonding with power tools and producing noxious fumes when burned, said core having inner and outer major faces,
- expanded metal mesh embedded in at least an outer face of said core,
- inner and outer wood panels covering both faces of said core,
- a heat conductive metal sheet covering the inner wood panel, and
- a metal sheet covering said outer wood panel.
2 more elements
Dependencies are inferred from the claim text.