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FR2683242A1
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Modular slab for horizontal partition.
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FR2331754A1
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Air distributor for building ventilation system - has rigid mineral fibre panelled walls with internally suspended ventilator and partitions
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FR2323082A1
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Fire retarding ventilator valve - has spring loaded poppet valve kept open by fusible nut on guide shaft
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FR2315651A1
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Automatic ventilation duct blocking device - has elastically pivoted flaps held open by fusible pins and closing onto collar
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FR2314432A1
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Attachment of branch pipe to main ventilation duct - using inclined tags which allow pipe to be screwed into duct
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FR2257848A2
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Branch pipe coupling bush - has thin and thick lips separated by groove for edge of main pipe hole
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FR2239643A1
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Self-supporting sleeve for tubes or ducts - is rapidly installed to support tubes passing through walls
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