发明名称 |
Quick opening internal manway for towers |
摘要 |
A manway cover is formed using two like door panels made of lightweight, corrosion-resistant material which are hand operable from either side of the manway and can be installed without tools.
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申请公布号 |
US4294049(A) |
申请公布日期 |
1981.10.13 |
申请号 |
US19800117159 |
申请日期 |
1980.01.31 |
申请人 |
MARATHON OIL COMPANY |
发明人 |
YOUNG, DICK K.;SUMNER, KENNETH E. |
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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