Patent ID: 7665256

Claim:
A device for firestopping a through-penetration opening in a partition, said device comprising: (a) a housing containing a central opening, wherein the cross-sectional area of the housing is greater than the cross-sectional area of the through-penetration opening, and further wherein said housing is arranged external to the through-penetration opening with at least a portion thereof extending along a surface of the partition thereby to allow the housing to be installed adjacent the through-penetration opening, said housing central opening is greater than said through-penetration opening, (b) a first firestop material arranged within said housing, wherein said firestop material is adjustable and comprises a pleated sheet of firestop material that is repeatably and reversibly extendable and retractable toward and away from one or more items passing through the through-penetration opening, thereby allowing additional items to be readily added to the through-penetration opening or removed from the through-penetration opening, and (c) further comprising stationary firestop material arranged along said side walls adjacent said central opening, and said housing further comprises an attachment mechanism for movably supporting said first firestop material within said housing.