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Inventor: Robert; Henri F. A.
Address: Herblay, FR
No. of patents: 1
Patents:
| Patent Number |
Title Of Patent |
Date Issued |
| 4860837 |
Rotary and reciprocating drilling machine |
August 29, 1989 |
| The invention relates to a drilling machine comprising a kelly (5) suspended from a boom (3) mounted for pivoting on a chassis (1), a rotary table (7) through which the kelly is movable axially, drive members provided in the rotary table for rotating the kelly and a rotary drilling t |
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