An apparatus and method is provided for substantially continuously drilling and disposing of drill cuttings and dust to minimize airborne contamination while providing protection against overload. A drill stem with a bit is advanced by a drill head to form the drill hole. A flushing mechanism utilizes...http://www.google.es/patents/US6216800?utm_source=gb-gplus-sharePatente US6216800 - In-situ drilling system with dust collection and overload control
In-situ drilling system with dust collection and overload control
