HYDRAULIC DAMPER Russian patent published in 2001 - IPC

FIELD: vibration protection systems of road-building machines. SUBSTANCE: hydraulic damper has reservoir, cylinder with two radial holes positioned in reservoir, rod with piston arranged in cylinder, two valves designed to pass liquid from above- and under-piston spaces of cylinder to reservoir. Damper also has hydraulic channel connecting the above- and under-piston spaces and throttling member built in hydraulic channel and made as spring-loaded tapered valve with bushing which adjusts tightening of tapered valve spring. Travel of tapered valve is limited by calibrated screw. The invention makes it possible to enhance damping efficiency due to adjustment of its value depending on operating conditions. EFFECT: higher efficiency. 4 dwg