AIR PERCUSSION MACHINE WITH MEANS FOR INDEPENDENT TOOL ROTATION Russian patent published in 2006 - IPC E21B6/04 

FIELD: mining, particularly blast-hole and well drilling machines with separate drives for percussion and rotation.

SUBSTANCE: machine comprises percussion mechanism provided with annular rotation mechanism supply channel and annular exhaust channel formed on front end surface thereof. The annular exhaust channel has annular exhaust shutdown edge. Rotation mechanism includes stator and rotor and is provided with short teeth located at mid-length thereof. Slide with helical channels, spindle, barrel and tool are arranged in rear rotation mechanism part. Initial and terminal helical channel parts are shifted 70-80° angles apart. Annular supply channel and annular exhaust channel of percussion mechanism end are permanently connected with diametrically opposite parts of initial helical channel parts along helical channel arches defined by 140-160° angles to provide supply channel and exhaust shutdown edge dimensions corresponding to slide diameter.

EFFECT: increased operational reliability.

2 dwg