Hydraulic precussion apparatus

Details Hydraulic precussion apparatus Hydraulic precussion apparatus

B - Operations, Transporting

25

D

138/40.13

B25D 9/12 (2006.01) B25D 9/14 (2006.01)

Patent

CA 1127046

Abstract of the Disclosure This application relates to a hydraulic percussion apparatus comprising a body, a cylinder in the body and a per- cussion piston reciprocating in the cylinder. A distributing valve controls the stroke of the piston and moves in a valve housing. There is provided a valve for starting and stopping the percussion apparatus, a hydraulic pump and hydraulic channels which form a percussion circuit with a gas/liquid accumulator. A distributing valve circuit and a free circula- tion circuit for the pump are parallelly coupled with the per- cussion circuit, which circuits are connected to the pump and to the start-and-stop valve which has positions for controlling pressure in the circuits.

354815

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