发明名称 |
Pivot connections for use with mine roof supports |
摘要 |
A mine roof support has gap seals in the form of L-shaped plates on its roof cap and goaf shield. The side walls of the plates overlap at the junctures between the roof cap and goaf shield and are connected with pivot connections each of which is composed of a pin inserted into apertures in the side walls of the plates. The pin has a peripheral groove at its inner end region which receives an arcuate yoke plate serving as a support. The yoke plate is itself detachably secured in place with a releasable rod permitting the pivot connection to be easily dismantled.
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申请公布号 |
US4701079(A) |
申请公布日期 |
1987.10.20 |
申请号 |
US19860900978 |
申请日期 |
1986.08.27 |
申请人 |
GEWERKSCHAFT EISENHUTTE WESTFALIA |
发明人 |
MEISSNER, HORST |
分类号 |
E21D23/03;(IPC1-7):E21D19/00 |
主分类号 |
E21D23/03 |
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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