Patent ID: 6336297
Filing Date: 2002-01-08
Classification: F16L

Abstract:
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.