초록 ▼

A firestop coupling assembly (10 or 210) for allowing the passage of utility members (50 or 52) through a penetration in a partition (54 or 56) while preventing the transmission of fire and smoke through the penetration. The coupling assembly includes an outer sleeve (12 or 212) and an inner conduit

A firestop coupling assembly (10 or 210) for allowing the passage of utility members (50 or 52) through a penetration in a partition (54 or 56) while preventing the transmission of fire and smoke through the penetration. The coupling assembly includes an outer sleeve (12 or 212) and an inner conduit (16 or 216). The outer sleeve has a concentric indention (12D or 212D) around its inner surface within which is mounted an intumescent material (20 or 220). In one (1) embodiment, the inner conduit is mounted in the open top end of the outer sleeve so that the second end (16B or 216B) of the inner conduit is adjacent the intumescent material. In another embodiment, the inner conduit is adjustable along the length of the outer sleeve. A plug (22 or 222) can be provided in at least one end of the inner conduit allowing passage of at least one (1) utility member through the assembly. In another embodiment, the inner diameter of the inner conduit is only slightly greater than the outer diameter of the utility member so that the utility member can be solvent welded to the inner surface of the inner conduit. When the coupling assembly is exposed to heat, the intumescent material expands into the inner passageway of the outer sleeve and prevents the transmission of smoke and fire through the coupling assembly.

대표청구항 ▼

1. A firestop coupling assembly to allow a utility member 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) an outer sleeve having an open first end and an open second end with a sidewall having an out

1. A firestop coupling assembly to allow a utility member 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) an outer sleeve having an open first end and an open second end with a sidewall having an outer surface and an inner surface extending the rebetween and forming an inner passageway along a longitudinal axis, the inner passageway having a first portion adjacent the first end and a second portion adjacent the second end wherein the outer sleeve is adapted to be mounted completely within the partition of the structure; (b) an inner conduit having an open first end and an open second end with a sidewall having an outer surface and an inner surface extending therebetween and forming an inner passageway having a longitudinal axis, wherein the inner conduit is a separate piece and is mounted in the first portion of the outer sleeve outer sleeve such as to not extend into the second portion of the inner passageway and such that the longitudinal axis of the outer sleeve is co-axial with the longitudinal axis of the inner conduit wherein the inner passageway of the outer sleeve and the inner passageway of the inner conduit are configured to accommodate the utility member to allow passage of the utility member through one partition; (c) an intumescent material mounted only in the second portion of the inner passageway of the outer sleeve adjacent the second end of the outer sleeve wherein when the intumescent material is heated above a predetermined temperature, the intumescent material expands to fill the inner passageway of the outer sleeve wherein the outer sleeve and the inner conduit are constructed of a fire rated polyvinyl resin so that the intumescent material can collapse the utility member to prevent the fire and smoke from spreading through the partition; and (d) a polyvinyl resin plug having at least one opening extending through the plug and mounted in the first end of the inner conduit to close the open first end of the inner conduit such that a longitudinal axis of the opening is parallel to the longitudinal axis of the inner conduit.