Abstract: A hydraulic damper of the monotube type in which the floating piston includes a first valve allowing fluid flow from the compression chamber to the compensation chamber when fluid pressure in the compression chamber exceeds that in the compensation chamber by a predetermined amount, and a second valve allowing fluid flow from the compensation chamber to the compression chamber when fluid pressure in the compensation chamber exceeds that in the compression chamber by a predetermined amount. Provides improved high speed damping.

Abstract: A suspension strut comprising a tube substantially closed at both ends and containing fluid; a piston assembly slidably mounted in the tube and making a sealing fit therewith, the piston assembly separating a compression chamber and a rebound chamber within the tube; a piston rod attached to the piston assembly and extending through the rebound chamber and out of one end of the tube; and a rebound stop mounted on the piston rod between the piston assembly and said one end of the tube, the rebound stop comprising a substantially rigid metallic ring secured to the piston rod and an annular bumper compressible between the metallic ring and the said one end of the tube during a rebound stroke, wherein the rebound stop and/or the one end of the tube is such as to alter the normal compression characteristics of the bumper on initial contact and compression of the bumper.