A rock drilling rig includes a movable carrier with a boom attached to it and movable in various ways. The free end of the boom is provided with drilling equipment. The drilling equipment is enclosed in a casing that prevents noise generated during drilling from spreading to the surroundings.The casing is arranged to move together with a feed beam and relative to the cradle mounted on the end of the boom.A flexible noise attenuating skirt projects forwardly from a front end of the casing for forming a sealed chamber around a drilling head.
|Publication status||Published - 13 Mar 2001|
|MoE publication type||H1 Granted patent|