Feed leg for a percussive drilling machine

Details Feed leg for a percussive drilling machine Feed leg for a percussive drilling machine

E - Fixed Constructions

21

B

255/37

E21B 19/087 (2006.01)

Patent

CA 1060428

A FEED LEG FOR A PERCUSSIVE DRILLING MACHINE ABSTRACT OF THE DISCLOSURE A hydraulically-extendable feed leg for a percussive drilling machine, which includes a variable- -volume closed chamber for containing a pressurised compressible fluid which acts, in use of the feed leg, to cushion shocks applied to the feed leg from the drilling machine. -1-

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