초록 ▼

A firestop coupling assembly for allowing the passage of utility members through a hole in a partition while preventing the transmission of fire and smoke through the hole. The coupling assembly includes a coupling and a firestop extension. The firestop extension has a housing with an inner passagew

A firestop coupling assembly for allowing the passage of utility members through a hole in a partition while preventing the transmission of fire and smoke through the hole. The coupling assembly includes a coupling and a firestop extension. The firestop extension has a housing with an inner passageway. Intumescent material is mounted in the inner passageway of the housing. The firestop extension is mounted on the coupling such that the intumescent material extends downward beyond a second end of the coupling. When the coupling assembly is exposed to heat, the intumescent material expands into the inner passageway of the housing of the firestop extension and blocks the second end of the housing of the coupling which prevents the transmission of smoke and fire through the coupling assembly.

대표청구항 ▼

1. 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 w

1. 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 inner 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 when the intumescent material is heated above a predetermined temperature, the intumescent material expands to fill the inner passageway of the housing.