Abstract: A pneumatic system that eliminates stops due to dirt in the lasers of an Autonomous Drilling Machine uses the resources of the equipment (Compressed Air) to maintain a positive pressure inside the metal protectors of the lasers, thus preventing the entry of dust in suspension and keeping the lasers clean. This avoids unduly stops of the machine due to dust contamination. The system uses a pneumatic control board connected through a flexible line to the machine's compressor's manifold, a frame, a pressure regulator, and a filter. The protectors for the lasers have perforations that allow the installation of diffusors. The diffusors are installed in the protectors to allow entrance of contamination-free compressed air. A flexible line, with its fittings and couplings, connects the pneumatic control board to each of the diffusors.

Abstract: Adjustable Breakout Wrench for Blasthole Drill Rods of Different Diameters that works through an automatic sequence of movements, which are approaches (turns), bar tightening, and exponential torque combined with pressure from two hydraulic cylinders, which act with built-in sequential valve regulation, as well as automatic adjustment that considers the wear in the external diameter of the rod. This tool, which has the general shape of an alligator wrench, can be mounted on drilling machines. It is designed to loose threaded rod joints of different diameters. For this purpose, it provides a practical and quick exchange of Jaw Kits, which have the preconceived dimensions to efficiently tighten each rod measure. This tool is efficient, practical, easy to maintain and above all versatile so that it can operate in drilling production with different diameters of rods, only making simple changes of components without disassembling the wrench from its support.