Title:
Tunnel driving machine steering system
United States Patent 3415574
US Patent References:
Excavating apparatus with relatively slidable supporting elements
- - 2756036
Feeding means for rotary head tunneling machine
- - 3061287
Rock driling machine
- - 3203737
Tunneling machine steering system
- - 3345108
Excavating apparatus with relatively slidable supporting elements
- - 2756036
Feeding means for rotary head tunneling machine
- - 3061287
Rock driling machine
- - 3203737
Tunneling machine steering system
- - 3345108
Inventors:
Ernst, Lauber
Publication Date:
12/10/1968
View Patent Images:
Export Citation:
Assignee:
HABEGGER AG MASCHF
Primary Class:
Other Classes:
299/56, 175/76
International Classes:
E21D9/10; E21D9/11
Foreign References:
| DE833335C | ||||
| PL37909A |