发明名称 |
Street cover hatch with air vent closed in the presence of rising water by ball float closure |
摘要 |
<p>Access to a street sub-surface duct is via an inspection shaft under a cover with a vent. The vent is protected by a ball float located within a surrounding cage. The vent is closed in the presence of rising water.</p> |
申请公布号 |
DE202005015356(U1) |
申请公布日期 |
2005.12.08 |
申请号 |
DE20052015356U |
申请日期 |
2005.09.21 |
申请人 |
EHD EISENHAMMER DRESDEN GMBH & CO. KG |
发明人 |
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分类号 |
E02D29/14;E03F5/02 |
主分类号 |
E02D29/14 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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