Patent ID: 6460652
Filing Date: 2002-10-08
Classification: E21B

Abstract:
A rock drilling apparatus having a boom arrangement comprising:a rock drilling apparatus having a control deck and a vertical axle disposed behind the control deck; a boom comprising at least two boom parts articulated to each other; an actuator arranged at an end of the boom; the boom including a first, vertical articulation and a horizontal articulation adapted to move the actuator to desired positions, the boom including a substantially horizontal first boom part having a first end adapted to be pivotably connected to the vertical axle at the first articulation, and at least one other boom part pivotably arranged at a second, free end of the first boom part, and wherein the boom is movable between a transport position and a working position by turning the first boom part about the vertical axle, and wherein the at least one other boom part is movable in a longitudinal direction of the rock drilling apparatus proximate at least one longitudinal side of the rock drilling apparatus and disposed at a distance from the control deck and, when the boom is moved to the transport position, the actuator is proximate the control deck, wherein the rock drilling apparatus has a front end and a rear end, the vertical axle is disposed between the control deck and the rear end, and the actuator is disposed proximate the front end when the boom is in the working position.