Underlayment for floor coverings

  • US 6,576,577 B1
  • Filed: 06/04/1999
  • Issued: 06/10/2003
  • Est. Priority Date: 12/03/1998
  • Status: Expired due to Fees
First Claim
Patent Images

1. An underlayment material for a non-textile flooring system, comprising:

  • (a) a flexible layer of frothed, polyurethane foam with an open cell structure and a density between 10 and 30 pounds per cubic foot;

    (b) a flexible substrate layer bonded to one side of the layer of polyurethane foam to form a thin underlayment material that is between about 0.05 and 0.125 inches thick wherein in use the underlayment material provides at least one of (a) smoothing imperfections beneath the flooring system, (b) providing a cushioning effect for the flooring system, and (c) reducing sound transmission through the flooring system; and

    (c) a non-textile flooring system.

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