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Andrei A. Trofimuk Patents |
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Inventor: Trofimuk; Andrei A.
Address: Novosibirsk, SU
No. of patents: 1
Patents:
| Patent Number |
Title Of Patent |
Date Issued |
| 4230191 |
Machine for making underground excavations |
October 28, 1980 |
| A machine for making underground excavations by compacting soil comprises an eccentric shaft having journals on which there are mounted for a free rotation in a sequence, beginning from the front end, a conical member and tapered rolls forming in combination a conically expanding body. T |
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