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US 4,137,949 AGranted
Method of making a fire retardant conduit
AssigneeGeneral Electric Company
InventorsPeter J. Linko, III, Stanley C. Harrier
Life of this patent
Estimating the term…
Abstract
A conduit such as a metal or flexible material fuel or oil tube is provided with a barrier to metallic fires through the use of the combination of carbon or graphite impregnated with a polymer resin to provide insulative as well as ablative characteristics.
Claims3
A method for making a fire-retardant conduit comprising the steps of:
- providing a plurality of first cloth members made from carbon fibers and preimpregnated with a binder;
- applying each of the plurality of first members in sequence about a conduit wall to provide a first fire-retardant barrier portion;
- providing at least one of a second cloth member made from glass fibers and preimpregnated with a binder;
- applying the glass fiber member about the first member to provide a second fire-retardant barrier portion;
- applying a film of release material over the second portion;
- applying over the release film a shrinkable plastic material having the capability of contracting upon the application of heat;
- applying heat to the shrinkable material sufficient to cause it to contract and to press the first and second barrier portions toward the conduit wall and into contact with each other;
- and then
- curing the binder impregnated in the members.
6 more elements
Dependencies are inferred from the claim text.