Hydraulic percussive machines

Details Hydraulic percussive machines Hydraulic percussive machines

B - Operations, Transporting

25

D

138/40.13

B25D 9/12 (2006.01)

Patent

CA 1109362

A B S T R A C T In a hydraulic percussive rock drilling machine of the differential piston area type, in which hydraulic fluid is constantly supplied to a return stroke chamber and fluid alternately supplied to and exhausted from a working stroke chamber, the dashpots for damping overtravel are provided in the working stroke chamber.

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