发明名称 Method and apparatus for installing mine roof supports
摘要 An apparatus for use in installing mine roof supports includes a vehicle which carries a coil of rod material. The rod material is fed from the coil and straightened. The straightened rod material is inserted into a hole drilled in the roof of the mine. An anchor is set to hold the rod material in the hole. A mine roof support plate is pressed against the roof of the mine and a fastener is tightened against the mine roof support plate to hold it in place. The rod material is then cut to separate the length of rod in the hole from the coil.
申请公布号 US4589803(A) 申请公布日期 1986.05.20
申请号 US19840569050 申请日期 1984.01.09
申请人 TOTTEN, III, ARTHUR B. 发明人 TOTTEN, III, ARTHUR B.
分类号 E21D20/00;E21D21/00;(IPC1-7):E21D20/00 主分类号 E21D20/00
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