Patent ID: 6470635
Filing Date: 2002-10-29
Classification: F16L

Abstract:
A firestop coupling assembly for use in allowing utility members to pass through a partition of a structure and to prevent transmission of fire and smoke through the partition of the structure, which comprises:(a) a coupling constructed of plastic having an open first end and an open second end with a sidewall having an outer surface and an inner surface extending therebetween and having an inner passageway around a longitudinal axis of the assembly; and (b) a firestop extension mounted on the outer surface of the sidewall of the coupling and including a housing constructed of metal having an inner passageway and an intumescent material mounted in the inner passageway adjacent one end of the housing spaced apart from the coupling wherein a portion of the housing having the intumescent material extends beyond the second end of the coupling in a direction opposite the first end of the coupling and wherein when the intumescent material is heated above a predetermined temperature, the intumescent material expands to fill the inner passageway of the housing.