Patent Number: 6,305,133

Title: Self sealing firestop coupling assembly

Abstract: 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.

Inventors: Cornwall; Kenneth R. (Duluth, GA)


International Classification: F16L 5/02 (20060101); F16L 5/04 (20060101); F16L 005/00 ()

Expiration Date: 10/23/2018