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Intumescent floor opening frame

  • US 6,848,227 B2
  • Filed: 10/01/2002
  • Issued: 02/01/2005
  • Est. Priority Date: 07/24/2002
  • Status: Expired due to Fees
First Claim
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1. A framing assembly comprising first and second frame members for bordering top and bottom sides of a conduit opening through a building floor, each of said frame members comprising a rigid body portion with a conduit passage therethrough, said assembly further including a rigid cover securable atop said first frame ember to one side of the conduit passage through the first frame ember, said second frame member being provided with a lining of intumescent material around the conduit passage through said second frame member, the intumescent material having sufficient expansion capacity to close off the conduit passage through the second frame member under conditions which produce an intumescing of the lining.

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  • 4 Assignments
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