Telescopic Shock Absorber
● Construction
This is formed by two concentric tubes, the inner tube being the pressure cylinder and the outer a reservoir for hydraulic fluid a piston and a piston rod assembly work in the cylinder. A valve assembly is fitted in the bottom of the cylinder and abuts a cap welded to the lower end of the reservoir. The top piston rod passes through an oil seal in a cap welded to the top of the reservoir. The top piston rod passes through an oil seal in a cap welded to the top of the reservoir tube. The top of the piston carries a further cap to which is attached a dust cover. Rubber bushed mounting eyes are welded to the top and bottom caps. The piston is drilled with too rings of holes, the outer ring controlled by a spring loaded flap valve, the inner ring is controlled by another flap valve backed by a support ring a helical spring abutting a shouldered nut which retains the piston and valves on the piston rod. In the lower end of the pressure cylinder is the valve assembly. The valve body has a large central hole and a ring smaller hole. A spring loaded recuperation valve is fitted over the large over the large central hole and spring discs cover the ring of smaller holes.
