HYDRAULIC DEVICE FOR CREATION OF HIGH-PRESSURE JET Russian patent published in 1997 - IPC

FIELD: mining industry. SUBSTANCE: this hydraulic device utilizes energy of high-pressure fluid jet and can be used for crushing rock. It has body and secured at its lower end is head with nozzles. Located in body are hollow piston with plunger and spool with overflow passages and bores. Arranged in lower part of body is displacer in the form of piston with double-side rod. Piston with plunger is installed for possibility of movement relative to displacer and with it they form two spaces for delivery of high-pressure jets both during working stroke of piston and during its idle stroke. This is achieved due to respectively radial passages, one axial and one spline passages in displacer which are connected with head nozzles through passages made in lower part of body and system of non-return valves. EFFECT: high efficiency. 4 dwg