Drop in fire stop assembly
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United States of America Patent
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Jul 23, 2024
Grant Date -
Feb 2, 2023
app pub date -
Jan 22, 2021
filing date -
Jan 22, 2021
priority date (Note) -
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Abstract
A concrete floor has a pipe passing through a hole in the floor. A drop-in fire stop assembly has a clam-shell configuration having first and second portions of a fire ring, split cage, split retainer ring, split intumescent ring, split inner smoke ring and split outer smoke ring each fastened together to rotate about a hinge on the split cage to open and close. The first and second portions have free ends that spread apart to fit around the tube in an open position, and close around the tube in a closed position. A latch on the free ends of the cage hold the two portions together in the closed position.
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