DROP IN FIRE STOP ASSEMBLY
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United States of America Patent
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Issued Date -
Oct 3, 2024
app pub date -
Jun 8, 2024
filing date -
Jan 23, 2020
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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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