DRILL FOR CORING COMPACTED AND POORLY-LOOSE MATERIALS Russian patent published in 1999 - IPC

FIELD: mining industry. SUBSTANCE: drill has rod. Mounted on rod is rotation handle with bush. Height of positioning rotation handle relative to rod is adjusted by means of stopper. Secured on lower part of rod is collector sleeve with auger deepener in its lower part having flat spiral on its external surface. Flat spiral of auger deepener is provided with sharp edge. Holder is fastened in lower part of rod. Auger deepener is rigidly fastened inside lower part of collector sleeve by its upper planes creating its spiral. Flat spiral is fastened on external surface of collector sleeve. Pitch of spiral flights is similar. After penetrating into material and delivery of sample into collector sleeve, drill is unscrewed by turning it counterclockwise. Sample is removed after detaching holder and turning collector sleeve upside down. Application of aforesaid embodiment of coring drill improves representativeness of sample. Drill is handy in use and more productive. EFFECT: higher efficiency. 4 cl, 4 dwg