HYDRAULIC DAMPER Russian patent published in 2017 - IPC F16F9/49 F16F9/58 

FIELD: machine engineering.

SUBSTANCE: hydraulic damper (10) contains the piston valve (22) fixed at the end of the piston rod (11), the base valve (27), the tank chamber (15). The base valve includes the compression side channel (31). The first coil spring (28) is provided between the first valve (24) and the base valve, and the second coil spring (23) is provided between the first valve and the piston valve. The compression side channel is closed by the first valve near the maximum compression state, reducing the oil flow rate, entering the tank chamber. The second valve (33), passing through the first valve centers and the base valve, regulates the oil flow rate, entering the tank chamber (15), when the pressure is equal to or exceeds the specified level of the pressure in the oil chamber (21b). In the second embodiment, the third valve is provided on the lower part of the first valve.

EFFECT: damping force characteristic change.

3 cl, 30 dwg