发明名称 |
Liquid infiltration prevention structures for preventing liquid infiltration manhole assemblies gate value sealing structures for preventing settling or shifting of key box bonnets and method for using said structures |
摘要 |
A gate valve box adaptor structure, the present invention provides a permanent support for the key box bonnet that is unaffected by the surrounding environment. The adaptor is supported on the gate valve to a positive location for the key box bonnet at a level which prevents infiltration of soil and moisture into the bonnet. The adaptor is provided with a resilient gasket of a unique design to provide a cushion and to create a seal for the bonnet on the gate valve.A plurality of liquid infiltration prevention structures for preventing liquid infiltration into manhole assemblies.
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申请公布号 |
US6226929(B1) |
申请公布日期 |
2001.05.08 |
申请号 |
US19990456611 |
申请日期 |
1999.12.08 |
申请人 |
GAGAS MICHAEL |
发明人 |
GAGAS MICHAEL |
分类号 |
E02D27/12;E02D29/12;E02D29/14;F16L17/06;H02G15/04;(IPC1-7):E02D29/12 |
主分类号 |
E02D27/12 |
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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