Cutterhead assembly for a shield-type tunneling machine
United States Patent 3309142
US Patent References:
/0977955.html
- - 0977955
/1055548.html
- - 1055548
Horizontal earth-boring machine
- - 1511957
Tunneling machine
- - 2134478
Rotary cutting, core breaking and conveying means
- - 2836408
/0977955.html
- - 0977955
/1055548.html
- - 1055548
Horizontal earth-boring machine
- - 1511957
Tunneling machine
- - 2134478
Rotary cutting, core breaking and conveying means
- - 2836408
Inventors:
Winberg, Douglas F.
Publication Date:
03/14/1967
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Export Citation:
Assignee:
ROBBINS & ASSOC JAMES S
Primary Class:
Other Classes:
175/413, 299/56, 175/382, 175/308, 299/85.200
International Classes:
E21D9/08; E21D9/12
Foreign References:
| DE68760C | ||||
| GB270007A | ||||
| GB762416A |