Title:
Tunnel boring machine having torsion counteracting means
United States Patent 2925258
Inventors:
Robbins, James S.
Publication Date:
02/16/1960
Export Citation:
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Assignee:
GOODMAN MFG CO
Primary Class:
299/31
Other Classes:
299/33, 299/60, 299/101, 299/110
International Classes:
E21D9/10; E21D9/11; E21D9/10
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US Patent References:
2846600Dynamoelectric machine
2837325Rotary type tunneling machine
2816747Cable pull assist for self-propelled longwall miner
2765154Boring type mining machine with tilt limiting means
2760766Tunnel excavator having rotary cutters mounted upon a rotatable cutting head
2756037Mining machines having oppositely rotating boring heads
2756036Excavating apparatus with relatively slidable supporting elements
2384397Machine for driving slopes and air courses in mines
1645007Mining machine
1353908Tunneling-machine