发明名称 Track-mounted shoe-supported inclining mining machine
摘要 The shoes on the goaf side of a longwall mineral mining machine comprise pivotally connected components so that the machine can hinge about these shoes during steering adjustments. Longitudinal pins connect components of goaf side shoes so that a pinion driven by the machine is maintained in engagement with a rack fixed to the track.
申请公布号 US4054321(A) 申请公布日期 1977.10.18
申请号 US19760709244 申请日期 1976.07.27
申请人 COAL INDUSTRY (PATENTS) LTD 发明人 JARVIS, WILLIAM JOSEPH
分类号 E21C29/02;E21C35/06;E21C35/08;(IPC1-7):E21C27/36;E21C27/24 主分类号 E21C29/02
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