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Waterbed mattress with air cushion

  • US 5,107,557 A
  • Filed: 02/14/1991
  • Issued: 04/28/1992
  • Est. Priority Date: 02/14/1991
  • Status: Expired due to Term
First Claim
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1. A waterbed mattress comprising:

  • a vinyl watertight bladder for holding water, said watertight bladder having a top, a bottom, and sides when filled with water; and

    an inflatable air cushion disposed on the top of the vinyl watertight bladder and secured thereto, said air cushion extending generally the length and breadth of the top of the vinyl watertight bladder, said air cushion being of a size sufficient to totally support a supine user;

    said air cushion being composed of at least two layers of vinyl, the topmost layer of the air cushion being sealed by relatively small, discontinuous seals to another layer of the air cushion at a plurality of locations inside the periphery of the air cushion, a relatively small fraction of the total area of the topmost layer of the air cushion being taken up by said small, discontinuous seals, said another layer of the air cushion being physically secured to the bottom of the watertight bladder only indirectly by means of the sides of the watertight bladder.

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