Method of and arrangement for positioning of a drilling apparatu

Details Method of and arrangement for positioning of a drilling apparatu Method of and arrangement for positioning of a drilling apparatu

1984-08-21

1986-05-06

Schran, Donald R.

Tool driving or impacting

Drive by means reacting to rotating eccentric mass

173 39, 173 20, 33185V, E21C 900

Patent

active

045865710

ABSTRACT:
The present invention relates to a method and an apparatus for positioning a drilling apparatus with respect to a drilling plane formed by holes to be drilled in a rock in a tunnel. Light beams pointing in opposite directions are developed and fixed with respect to the drilling unit and are directed towards marks on the tunnel walls by adjusting the base of the apparatus in a horizontal plane.

REFERENCES:
patent: 3181624 (1965-05-01), Lindberg
patent: 3998554 (1976-12-01), Burch et al.
patent: 4142798 (1979-03-01), Barbee, Jr.

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