Title:
Mining and excavating machine of the rotary type
United States Patent 2919121
US Patent References:
/0537899.html
- - 0537899
/1073184.html
- - 1073184
Excavator and pipe layer
- - 2211223
Mining machines having oppositely rotating boring heads
- - 2756037
Rotary type tunneling machine
- - 2798707
/0537899.html
- - 0537899
/1073184.html
- - 1073184
Excavator and pipe layer
- - 2211223
Mining machines having oppositely rotating boring heads
- - 2756037
Rotary type tunneling machine
- - 2798707
Inventors:
Ruth, Joseph P.
Publication Date:
12/29/1959
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Export Citation:
Assignee:
Ruth, Joseph P.
Primary Class:
Other Classes:
175/388, 299/62, 175/62, 175/102, 175/99, 175/95, 175/94, 299/87.100, 175/76, 405/138, 175/319
International Classes:
E21C35/08; E21D9/11; E21C35/00; E21D9/10
US Patent References:
| 2821374 | Coal mining machine having a pivotally mounted cutter tube |
Foreign References:
| AU165358B |