Positioning device for rock drills
United States Patent 3295800
US Patent References:
Rock drilling apparatus
- - 2614807

Coal drill mount
- - 2690896

Vibrating conveyor
- - 3165197


Inventors:
Karl-erik, Qvarnstrom
Rune, Skattman Carl Valfrid
Publication Date:
01/03/1967
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Assignee:
ATLAS COPCO AB
Primary Class:
248/654
Other Classes:
173/193, 248/421
International Classes:
E21B7/02