FIRESTOP COLLAR
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United States of America Patent
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Apr 27, 2016
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Apr 27, 2015
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Abstract
A firestop collar (10) for sealing of openings, especially of line penetrations (12), that pass through walls (11) or ceilings has a frame (16) and a block (20) of optionally intumescent material disposed therein, and is characterized in that the block (20) is a regular polyhedron.
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