发明名称 |
SHIELD ASSEMBLIES FOR INSTALLATION IN UNDERGROUND ROADWAYS AND ROCK EXCAVATING MACHINES INCLUDING SUCH SHIELD ASSEMBLIES |
摘要 |
<p>A shield assembly for installation in an underground roadway or tunnel comprises an articulated upper shield assembly, a lower shield assembly and a plurality of hydraulic rams for urging the upper shield assembly upwards relatively to the lower shield assembly, a telescopic arrangement being provided which guides the upper shield assembly in a direction along the roadway or tunnel but which allows the end margins of the upper shield assembly to move outwardly relative to the end margins of the lower shield assembly.</p> |
申请公布号 |
GB2037843(A) |
申请公布日期 |
1980.07.16 |
申请号 |
GB19780048634 |
申请日期 |
1978.12.15 |
申请人 |
COAL INDUSTRY (PATETNS) LTD |
发明人 |
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分类号 |
E21D9/06;E21D9/08;E21D9/087;(IPC1-7):21D9/06 |
主分类号 |
E21D9/06 |
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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