Mining machine having independently operable skids
United States Patent 2935309
US Patent References:
Walking-motion propelling apparatus
- - 1429551
Coal mining machine
- - 2062657
Earth drilling machine
- - 2394194
Mining machine
- - 2616677
Mining process and system by remote control
- - 2699328
Walking-motion propelling apparatus
- - 1429551
Coal mining machine
- - 2062657
Earth drilling machine
- - 2394194
Mining machine
- - 2616677
Mining process and system by remote control
- - 2699328
Inventors:
Mccarthy, Vincent J.
Publication Date:
05/03/1960
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Export Citation:
Assignee:
SALEM TOOL CO
Primary Class:
Other Classes:
299/55, 180/8.500
International Classes:
E21C25/58; E21C25/00
US Patent References: