Fire-proof seals

Details Fire-proof seals Fire-proof seals

1990-01-26

1992-02-25

Picard, Leo P.

Electricity: conductors and insulators

Conduits, cables or conductors

Single duct conduits

174151, H02G 322

Patent

active

050916050

ABSTRACT:
A fire-proof seal for a tubular conduit (16) of thermally conductive material adapted to contain an elongate member (24) extending axially outside the conduit, the seal comprising a thermally conductive sleeve (34) surrounding the member externally of the conduit and in thermal contact with an external flange (40) of the conduit, and a thermally fusible material (30) surrounding the member within the conduit, whereby, in the event of a fire in the vicinity of the member externally of the conduit, heat is transmitted through the sleeve into the conduit so as to fuse the thermally fusible material and block the interior of the conduit.

REFERENCES:
patent: 3830957 (1974-08-01), Oberdiear
patent: 3895177 (1975-07-01), Muslin
patent: 4088381 (1978-05-01), Harnett

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