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US 6,723,401 B1Granted
Vibration damping member and method of making same
AssigneeErgodyne Corporation
InventorsRobert T. McKnight, Clifford A. Metger, Kent Wilson
Life of this patent
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Abstract
A laminate article for damping mechanical vibrations. One embodiment of the damping article includes a neoprene layer, a foamed polyurethane middle layer, and a nonfoamed polyurethane layer. The layers are preferably adhered in an overlaying relation. The article reduces at least 40% of high frequency mechanical vibrations (200 Hz-1250 Hz) otherwise transmitted to the wearer.
Claims38
A substantially flexible article for damping mechanical vibrations, comprising:
- a first layer comprising a first layer polymer damping mechanical vibrational frequencies between about 31.5 Hz and 200 Hz;
- a second layer comprising a second layer viscoelastic polymer with a second layer density, the second layer damping mechanical vibrational frequencies between about 200 Hz and 1250 Hz;
- and
- a third layer comprising a third layer viscoelastic polymer with a third layer density, the second layer density between about 90 and 95 percent of the third layer density, the third layer damping mechanical vibrational frequencies between about 31.5 Hz and 200 Hz, the first, second, and third layers disposed in a substantially overlaying relation.
1 more element
Dependencies are inferred from the claim text.