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Acoustical barrier for vehicles
   
Document Number
US Patent 4800984
Issued Date
January 31, 1989
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Abstract
An acoustical barrier usable for sound deadening and vibration dampening in vehicles which includes a base layer of a flexible foam secured at the outer surface to an insulation layer of polyurethane elastomer molded to the shape of the area to be insulated such as an automobile fire wall area. The inner surface of the base layer will preferably be in contact with the area to be insulated. The polyurethane elastomer of the insulation layer will preferably include a natural mineral filler impregnated therein. The insulating layer provides the rigid form for holding of the flexible foam, which itself provides a stand-off to hold the insulating layer in spaced relation with respect to the vibrating surface. The polyurethane elastomer can vary in thickness in proportion to the level of acoustical activity of the area to be insulated.
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Acoustical barrier for vehicles - US Patent 4800984 Drawing
Drawing from US Patent 4800984
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Number of Claims:
15
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Owner
Published
January 31, 1989
Application Number
07/042,188
Filed
April 24, 1987
US Classification
181/290   181/294
Int'l Classification
B32B   5/18   (20060101)   B60R   13/08   (20060101)  
Examiner
Attorney/Law Firm
USPTO Field of Search
181/290   181/291   181/294   181/DIG.1  
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Description
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