Combined impact and pressure liquid rock drill

Details Combined impact and pressure liquid rock drill Combined impact and pressure liquid rock drill

E - Fixed Constructions

21

B

255/11, 255/13

E21B 7/18 (2006.01) B25D 9/12 (2006.01) E21B 10/60 (2006.01)

Patent

CA 1136118

Abstract A conventional type of impact rock drill is modified to include a fluid reservoir, valve and piston arrangement whereby each impact stroke of the driver ejects water at high pressure from the cutter bit, thereby increasing the mechanical cutting through hydraulic action of a small volume of high pressure jet of water.

361090

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