Title:
Tunnel boring machine having torsion counteracting means
United States Patent 2925258

Inventors:
Robbins, James S.
Publication Date:
02/16/1960
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Assignee:
GOODMAN MFG CO
Primary Class:
299/31
Other Classes:
299/60, 299/101, 299/110, 299/33
International Classes:
E21D9/10; E21D9/11
US Patent References:
2760766Tunnel excavator having rotary cutters mounted upon a rotatable cutting head
2765154Boring type mining machine with tilt limiting means
2816747Cable pull assist for self-propelled longwall miner
2837325Rotary type tunneling machine
2846600Dynamoelectric machine