Pipe joints or couplings – Connector for conduit housing electromagnetic line: – Having box and connector
Patent
1986-01-14
1987-06-02
Murtagh, John E.
Pipe joints or couplings
Connector for conduit housing electromagnetic line:
Having box and connector
52220, 277 26, 277189, F16L 500
Patent
active
046697594
ABSTRACT:
A fire-stop stack fitting (34) includes a cylindrically-shaped coupling wall (36) having a stop (52) therein for receiving pipes to be coupled from first and second ends. The first end of the cylindrically-shaped coupling wall is affixed to a cavity forming wall (42) defining a cavity which is open in an inwardly radial direction and in a first-end axial direction but which is closed in an outwardly radial direction and in a second-end axial direction. An attachment flange (46) is affixed to the first end of the cavity-forming wall for attaching the fire-stop stack fitting to a concrete form (50). An intumescent material (44) is placed in an intumescent-material cavity (62) and the flange of the fire-stop stack fitting is fastened to a concrete form wall. After concrete (56) has hardened and the form wall (50) is removed, pipes (38, 40) are inserted in opposite ends of the cylindrically-shaped wall (36). The intumescent-material is quickly heated by fire on the first side of the wall since the intumescent-material cavity is open to that side and the intumescent material is free to expand radially into the pipe (40) inserted into the first end of the fitting.
REFERENCES:
patent: 3294358 (1966-12-01), Hagedorn
patent: 3346230 (1967-10-01), Tolf, Jr.
patent: 4237667 (1980-12-01), Pallucci et al.
patent: 4261598 (1981-04-01), Cornwall
patent: 4313286 (1982-02-01), Harbeke
patent: 4404983 (1983-09-01), Scheurenbrand et al.
patent: 4424867 (1984-01-01), Mallow
patent: 4453354 (1984-06-01), Harbeke
patent: 4458460 (1984-07-01), Kohaut
patent: 4619087 (1986-10-01), Harbeke
patent: 4619471 (1986-10-01), Harbeke
patent: 4623170 (1986-11-01), Cornwall
Coastal Construction Products, Inc., Section 07251, "Intumescent Fireproofing".
Murtagh John E.
Rudy Andrew Joseph
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