Ducting fire protection

Details Ducting fire protection Ducting fire protection

1976-11-11

1979-03-13

Schwadron, Martin P.

Fluid handling

Destructible or deformable element controlled

Heat destructible or fusible

251 4, 264230, 264261, 285187, 285423, F16K 1738

Patent

active

041436717

ABSTRACT:
A length of fiberglass duct with a thermoplastic sleeve positioned within the duct as a liner, with the sleeve fixed to the duct at the downstream end of the sleeve. Flames or high temperature fluids moving through the duct soften the thermoplastic sleeve and causes the sleeve to collapse blocking further movement through the duct. In an alternative embodiment, the sleeve is used as a splice between two pieces of duct with the heat in the duct causing the softening and collapse of the sleeve.

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patent: 3504615 (1970-04-01), Kurz
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patent: 3592207 (1971-07-01), Borello
patent: 3720153 (1973-03-01), Jardinier et al.
patent: 3726050 (1973-04-01), Wise et al.
patent: 3756137 (1973-09-01), Scharres
patent: 3835875 (1974-09-01), Morse
patent: 3921657 (1975-11-01), Bergmark et al.

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