发明名称 Plow cutter assembly
摘要 A plow cutter assembly to be used in the strip mining of coal, the assembly comprising a container having a plurality of steel spikes mounted at an angle on its lower face. A hoist pulls the assembly along the face of a coal vein and the spikes shave off layers of coal.
申请公布号 US4065184(A) 申请公布日期 1977.12.27
申请号 US19760736149 申请日期 1976.10.27
申请人 TIPPER, JOHN M. 发明人 TIPPER, JOHN M.
分类号 E21C27/34;(IPC1-7):E21C35/20 主分类号 E21C27/34
代理机构 代理人
主权项
地址