135146 ⎘
Drives for drilling with combined rotary and percussive action the rotation being intermittent, e.g. obtained by ratchet device Separate drives for percussion and rotation
Device for generating oscillations for a construction machine and method of operation
#2Multipurpose drill system
#3Down-the-hole hammer
#4AIR PRESSURE REUSED PNEUMATIC HAMMER DRILL
#5Vibration hammer
#6Percussion device, drilling machine including such a percussion device and method for controlling such a percussion device
#7Earth auger head and excavation method
#8Rotary percussive drilling device
#9Liquid driven downhole drilling machine