Back to results
US 4,709,781 AGranted
Sound-damping and heat-insulating composite plate
AssigneeAustria Metall Aktiengesellschaft
InventorWilhelm Scherzer
Life of this patent
Estimating the term…
Abstract
A sound-damping composite panel with elastic properties is provided by disposing a prefabricated porous core made from rubber granules or scrap, e.g. rubber tire scrap, between a pair of metal layers or sheets, e.g. of aluminum, and adhesively bonding the metal layers to the core under heat and pressure.
Claims7
A sound-damping composite body consisting essentially of two metal cover layers and a porous core layer, said core layer being positioned between the two metal cover layers and bonded to each of said metal layers, said core layer being composed of interbonded particles of rubber forming pores between them.
Dependencies are inferred from the claim text.