DEVICE FOR RECORDING STATIC PRESSURE CHARACTERISTICS OF CURRENT COLLECTOR Russian patent published in 1994 - IPC

FIELD: electrified rolling stock. SUBSTANCE: device has hydraulic single-acting damper whose housing is coupled with pressure pedal and piston, through rod, with base of displacement electric converter. Piston has through channel with fitted-in check valve whose output is arranged at rod side. Under-piston and above-piston spaces communicate through bypass channel furnished with working fluid flow regulator. The latter is made in form of screw shutoff cock. Used as working fluid is liquid with low solidification point, for instance, spindle oil. In service, false operation of pressure pickups caused by possible pulsations and vibrations when vehicle current collector passes over pickups is prevented. EFFECT: enhanced reliability of operation. 3 cl, 2 dwg