RAILWAY CAR DAMPER Russian patent published in 2016 - IPC B61F5/24 F15B21/00 

FIELD: transport.

SUBSTANCE: claimed device, a vessel, comprises the first open/close valve arranged at first channel to connect the chamber from rod side with chamber from the piston side. Said chambers are defined by the piston that can open and shutoff the first channel. The second open/close valve arranged in the first channel communicating the chamber from the side of piston with vessel to open and shutoff the second channel. The pump is designed to be actuated at predefined rpm to feed fluid from said tank to the chamber on rod side. The pump rpm is decreased at the force set by the signal lower than the normal limiting lower magnitude. The latter makes the lower limiting magnitude of the force to be generated by the drive at the pump revolution at normal rpm.

EFFECT: higher damping efficiency, hence, higher comfort for passengers.

8 cl, 4 dwg