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Fire and liquid seals for pipes and conduits and method of forming same

  • US 4,086,736 A
  • Filed: 12/16/1976
  • Issued: 05/02/1978
  • Est. Priority Date: 12/16/1976
  • Status: Expired due to Term
First Claim
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1. A fire seal for a structural wall penetration comprising a support pipe of circular cross-section embedded in and extending through a structural wall, a conduit of circular cross-section of smaller size than said support pipe oriented in and extending through said support pipe with the outer wall of said conduit being spaced from the inner wall of said support pipe, a packing of heat resistant thermal insulation material comprising a body of silicone foam occupying the space between the outer wall of said conduit and the inner wall surface of said support pipe, a first flexible boot means extending between one end of said support pipe and said conduit on one side of and externally of said structural wall, inelastic fastening means for clampingly and sealingly fastening said first flexible boot means to said support pipe and said conduit, a second flexible boot means positioned externally of said structural wall extending between a second end of said support pipe and a second end of said conduit on the opposite side of said structural wall from said first flexible boot, second inelastic fastening means clampingly and sealingly fastening said second flexible boot means to said second end of said support pipe and said second end of said conduit.

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