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Spring ring tissue expander

  • US 4,828,560 A
  • Filed: 02/17/1988
  • Issued: 05/09/1989
  • Est. Priority Date: 02/17/1988
  • Status: Expired due to Term
First Claim
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1. A tissue expansion device for implantation beneath the skin, thereafter to be expanded to enlarge the surface area of the skin overlying the device, comprising:

  • (a) a shell consisting of a thin flexable, expandable elastomeric envelope of substantially uniform thickness containing a substantially leakproof chamber therein;

    (b) a spring loaded marginal tensioning loop, said tensioning loop disposed within said leakproof chamber to exert a substantially uniform outward pressure against the interior wall of said shell, said outward pressure being sufficient to stretch said shell at least enough to remove wrinkles from said shell; and

    (c) means for introducing a fluid into said leakproof chamber.

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