Drainage system and apparatus for treating runoff
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United States of America Patent
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Aug 22, 2017
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app pub date -
Apr 6, 2015
filing date -
Apr 17, 2014
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Abstract
A drainage system, comprising a collector which is arranged to collect liquid and a drainage pipe having a pipe inlet that opens into the collector such that liquid collected by the collector drains through the pipe inlet. The drainage pipe is provided with a vent spaced away from the pipe inlet. The vent is arranged such that, when liquid collected by the collector occludes the pipe inlet, liquid flowing through the drainage pipe draws air into the drainage pipe through the vent.
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