Method and apparatus for repairing ruptures in underground conduits

  • US 5,049,003 A
  • Filed: 12/24/1990
  • Issued: 09/17/1991
  • Est. Priority Date: 08/23/1989
  • Status: Expired due to Term
First Claim
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1. Apparatus for repairing ruptures in underground conduits comprising:

  • an inflatable bladder that is introducible into a generally cylindrical conduit proximate a rupture therein, said bladder having a generally smooth surface in its inflated condition;

    a flexible sleeve that is wrapped about and directly engagable by at least a portion of said bladder and is sufficiently large to cover said rupture; and

    means for inflating said bladder to urge said sleeve into generally conforming engagement with the entire inner circumferential surface of at least a section of said conduit such that said sleeve covers said rupture, said sleeve including an adhesive bonding substance that adheres said sleeve to said conduit and is hardenable to bond said sleeve to said conduit.

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