Patent attributes
A hydraulic damper includes a cylinder holding a hydraulic fluid, a piston rod movable in and out of the cylinder, a rigid valve block coupled to the piston rod and having equiangularly spaced through holes, a piston coupled to the piston rod and having a plurality of axially extending through holes, a number of the through holes of the piston being respectively aimed at the through holes of the rigid valve block for allowing the hydraulic fluid to pass through the piston in one direction at a high speed during outward stroke of the piston rod and to pass through the piston in the other direction at a low speed during inward stroke of the piston and a plurality of spring strips for stopping against the rigid valve block, and a cushion block that buffers the impact of the rigid valve block when the piston rod is extended out of the cylinder.
