发明名称 |
Locking system for drainage shaft cover incorporates signal pin that self-destructs upon removal |
摘要 |
<p>A sub-surface vertical water drainage shaft has a flush-fitted shaft cover located within a surrounding frame. The frame has an inner transverse member with a trap hole for a locking signal pin inserted from above through the cover. The locking signal pin is destroyed by removal. Further claimed is a commensurate shaft cover.</p> |
申请公布号 |
DE102005033705(B3) |
申请公布日期 |
2006.12.21 |
申请号 |
DE20051033705 |
申请日期 |
2005.07.19 |
申请人 |
ACO SEVERIN AHLMANN GMBH & CO. KG |
发明人 |
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分类号 |
E02D29/14;E03F5/02;E03F5/04 |
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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