发明名称 |
Apparatus for use in mining or tunnelling installations |
摘要 |
Apparatus for use in mining or tunnelling installations comprises a shield for housing excavation machinery, and a floor sill for supporting said machinery. The shield is constituted by a plurality of generally cylindrical sections. Means are provided for advancing the shield whilst the floor sill is held stationary. Means are also provided for advancing the floor sill whilst the shield is held stationary.
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申请公布号 |
US4055959(A) |
申请公布日期 |
1977.11.01 |
申请号 |
US19760745748 |
申请日期 |
1976.11.29 |
申请人 |
GEWERKSCHAFT EISENHUTTE WESTFALIA |
发明人 |
FRITZ, GISELHER |
分类号 |
E21D9/06;E21D9/08;(IPC1-7):E01G3/02 |
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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