发明名称 |
Containment manhole having spillage sealing means |
摘要 |
A containment manhole is disclosed which includes a hollow body having a closed bottom and an open top. A concentric opening is provided in the bottom to receive an underground tank fill therethrough and a circular, resilient seal is provided to seal the junction between the tank fill and the manhole bottom. Optionally, a drain valve may be provided in the manhole bottom to lead any spillage directly back to the tank fill. The manhole terminates upwardly in the machined ring and includes a gasketed junction with the ring. The ring includes an upper shoulder upon which the cover peripheral lip can rest and a lower shoulder of size to enable the cover peripheral edges to rest. An O-ring seal is provided intermediate the cover and the top ring to provide a first sealed junction and a circular gasket is affixed on the lower ring edge to provide a second seal when the cover is in position.
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申请公布号 |
US4706718(A) |
申请公布日期 |
1987.11.17 |
申请号 |
US19860875271 |
申请日期 |
1986.06.17 |
申请人 |
UNIVERSAL VALVE CO., INC. |
发明人 |
MILO, JOSEPH V. |
分类号 |
B65D90/10;(IPC1-7):F16L5/00 |
主分类号 |
B65D90/10 |
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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