135138 ⎘
Drives for drilling, used in the borehole; Down-hole impacting means, e.g. hammers; Fluid operated hammers of the self propelled-type, e.g. with a reverse mode to retract the device from the hole
Earth Drilling Device
#2Diaphragm wall down-the-hole hammer trenching machine and use method thereof
#3Ground drilling device, method for the production and use thereof
#4Down-the-hole hammer drill bit retaining assembly
#5Reversible pneumatic pipe ramming tool
#6Percussion boring device
#7Percussion drilling device
#8Percussion boring device and method for reversing a percussion boring device
#9Ram boring device
#10Optimized soil penetrating machine
#11Two-port percussion mole
#12Ground-drilling device
#13Ram boring device
#14A REVERSIBLE, PERCUSSIVE, RAM-BORING MACHINE
#15Pneumatic impact tool
#16Pneumatic impact piercing tool
#17Boring head method and boring head for a ground boring device
#18Pneumatically reversible ram boring device
#19Downhole data and/or power transmission system
#20Underground piercing tool
#21Reversible penetrating machine with a differential air distributing mechanism
#22Sonic drill
#23Pneumatic ground piercing tool
#24Pneumatic impact piercing tool
#25Method and system for operating a reversible pneumatic ground piercing tool