Patent ID: 9624638
Date: 2017-04-18
CPC Classifications: E02D

Claim:
1. A machine for making columns in ground, the machine comprising: a carrier having a mast extending along a longitudinal direction; a movable carriage mounted to slide along the mast; a ground perforation tool extending along a longitudinal axis parallel to said longitudinal direction and secured to said movable carriage, presenting a top end connected to building material feed means, and a bottom end provided with an orifice for injecting building material; a rotary drive system for driving the ground perforation tool in rotation; a body extending around the ground perforation tool so that the ground perforation tool is suitable for sliding through said body; and a coupling system for coupling together the body and the ground perforation tool, configured in such a manner that, in at least one configuration, moving the ground perforation tool in rotation entrains rotation of the body and moving the ground perforation tool in translation entrains the body in translation, and wherein the coupling system is a bayonet system.