发明名称 |
RIOOLKOLKDEKSELBLOKKERING. |
摘要 |
<p>A manhole assembly includes a cover rotatable within a frame to lock the cover therein, the cover being formed with at least one projection extending outwardly of its periphery. The frame is formed with at least one anchorage, and a rod is threaded at one end thereof and has an anchoring formation at the other end thereof. The rod may be engaged between the projection and the anchorage and a nut may be screwed on the threaded end of the rod to move the projection towards the anchorage and lock the cover in the frame.</p> |
申请公布号 |
NL177616(B) |
申请公布日期 |
1985.05.17 |
申请号 |
NL19750002289 |
申请日期 |
1975.02.26 |
申请人 |
PONT-A-MOUSSON S.A. TE NANCY, FRANKRIJK. |
发明人 |
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分类号 |
E02D29/14;(IPC1-7):E02D29/14 |
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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