Hydraulic fluid pressure adjusting device for rock breaker type percussion apparatus, has movable part whose movement causes deformation of washer for creating passage on circuit that drifts part of hydraulic fluid flow to adjust pressure

摘要

The device has two parts (17, 18) mounted in a bore of the body, where the part (17) is immovable, and the part (18) is movable in the direction of the part (17) under the action of hydraulic fluid supply pressure. The movement of the part (18) causes deformation of a washer (19) for creating a passage on a drifting circuit which drifts a part of the fluid supply flow towards a hydraulic fluid retaining circuit to adjust inlet pressure.