Fluid handling – Destructible or deformable element controlled – Heat destructible or fusible
Patent
1991-04-29
1993-02-02
Rivell, John
Fluid handling
Destructible or deformable element controlled
Heat destructible or fusible
137362, 52232, F16K 1714
Patent
active
051830701
ABSTRACT:
An improved firestop stack fitting assembly (10) for use in a building with a floor (22) and a ceiling (30) supported by a floor joist (36), is described. The fitting includes a flammable main conduit (12) mounted on a flammable pipe (18), provided with a non-flammable insert (20) mounted through an opening in the floor. An extension conduit (14) supports a non-flammable plug (40) which is released to fall into and seal off the sleeve and insert when a harness (42) is melted by heat from a fire burning below the ceiling of a lower story or burning in a joist space (28) between the ceiling and the floor to prevent the fire from spreading to an upper story above the floor through the insert. A tee fitting (150) can be optimally mounted in the joist space connected to a pipe (118) mounting an insert (120) and to drain pipe (162) and an extension conduit (164). The fitting assembly prevents the spread of fire and smoke through the insert and main conduit.
REFERENCES:
patent: 1510813 (1924-10-01), Williams
patent: 2128292 (1938-08-01), Finn
patent: 3726050 (1973-04-01), Wise et al.
patent: 4583565 (1986-04-01), Cornwall
patent: 4638829 (1987-01-01), Cornwall
patent: 4724858 (1988-02-01), Cornwall
McLeod Ian C.
Rivell John
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