Retrofittable fire-stop device

Details Retrofittable fire-stop device Retrofittable fire-stop device

1992-08-07

1993-11-02

Fox, John C.

Fluid handling

Ambient condition change responsive

Atmospheric

52 1, 52232, F16K 300

Patent

active

052576418

ABSTRACT:
A retrofittable fire-stop device for use with PVC or other plastic piping is disclosed. The device includes drive means for forcing a cutting member through plastic piping in response to heat. The cutting member blocks the hole and also supports blocking means which expands within the remaining pipe to prevent fire and smoke from moving from room to room through the piping.

REFERENCES:
patent: 4109423 (1978-08-01), Perrain
patent: 4307546 (1981-12-01), Dolder
patent: 4788800 (1988-12-01), Whitely

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