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US 4,923,034 AGranted
Vibration-controlling member
AssigneeMatsushita Electric Works, Ltd.
InventorsMasayuki Okuzawa, Yuza Okudaira, Futoshi Maeda
Life of this patent
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Abstract
A vibration-controlling member is made by containing a flake-shaped powdery substance having vibration controlling action in a retainer adhered to one surface of a surface sheet. Any external shock imparted to the member is subjected to the vibration controlling action due to a grain boundary friction of the powdery substance.
Claims4
A vibration-controlling member comprising:
- a top surface element, and
- a shock-absorbing and vibration-damping means backing said top surface element, said shock-absorbing and vibration-damping means including a flake-shaped powdery substance having a high flake diameter to thickness ratio providing shock-absorbing and vibration-damping action due to a grain boundary friction of the flake-shaped powdery substance and a retainer of a foamed body sheet of a polymeric material for enclosing therein said powdery substance and adhered to an inner surface of said top surface element, said foamed body sheet being formed of a water dispersion of an emulsion of said polymeric material, and said powdery substance and polymeric material being mixed at a weight ratio of 1:0.1 to 1.
Dependencies are inferred from the claim text.