Hydraulic percussive machines

Details Hydraulic percussive machines Hydraulic percussive machines

B - Operations, Transporting

25

D

138/40.13

B25D 9/12 (2006.01) B25D 17/20 (2006.01) E21B 6/00 (2006.01) E21B 6/08 (2006.01)

Patent

CA 1044116

ABSTRACT OF DISCLOSURE A hydraulic percussive machine comprising a cylinder, a piston reciprocable up and down in the cylinder, an inlet for hydraulic fluid to the machine, an outlet for hydraulic fluid from the machine, valve and timing means for con- trolling the operation of the piston, a chuck for holding a tool, a mechanism for rotating the chuck, a cushioning flange on the piston, a dashpot space in the cylinder adapted to be entered by the flange on overtravel of the piston on its downstroke, and a first connection for feed- ing fluid trapped under pressure in the dashpot space to the chuck driving mechanism as a motive for that means.

274077

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