发明名称 |
Composite underground fluid conduit of concrete and steel sections |
摘要 |
A composite underground shaft lining assembly particularly suitable for use as a leak proof water conduit is formed with a plurality of annular concrete sections joined together by interposed layers of flexible joint material forming a composite concrete cylinder, with a composite steel cylinder formed of annular steel sections being arranged about the outer cylindrical surface of the composite concrete cylinder. The annular steel sections of the composite steel cylinder are joined together by spring rings located adjacent the flexible joints formed between the annular concrete sections.
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申请公布号 |
US4241762(A) |
申请公布日期 |
1980.12.30 |
申请号 |
US19790015628 |
申请日期 |
1979.02.27 |
申请人 |
GUTEHOFFNUNGSHUTTE STERKRADE AG |
发明人 |
LENDLA, HEINZ;LINK, HEINZ;SCHUPP, HERIBERT |
分类号 |
E21D5/012;E21D5/11;(IPC1-7):F16L1/00 |
主分类号 |
E21D5/012 |
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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