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VEHICLE SEAT COMPRISING THREE FOAM LAYERS

  • US 3,833,259 A
  • Filed: 05/30/1972
  • Issued: 09/03/1974
  • Est. Priority Date: 05/30/1972
  • Status: Expired due to Term
First Claim
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1. A vehicle seat comprising:

  • top and bottom layers of open cell polyurethane foam having a density of approximately three pcf and exhibiting an indentation load deflection characteristic requiring approximately 30 lbs./50 in.2, to deflect a sample thereof through 25 percent of its thickness, as determined by SAE recommended practice, SAE J815 for the year 1972;

    said top and bottom layers sandwiching a center layer of closed-cell polyethylene foam having a density of approximately two pcf and exhibiting an indentation load deflection characteristic requiring approximately 300 lbs./50 in.2, to deflect a sample thereof through 25 percent of its thickness, as determined by said SAE recommended practice;

    the composite thickness of said layers of foam being no less than four inches nor more than ten inches, said center layer of foam having a thickness between 10 and 25 percent of said composite thickness and being placed in the bottom 60 percent of said composite thickness and said bottom layer being at least three-fourths of an inch thick.

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