Patent ID: 9228632
Filing Date: 2016-01-05
CPC Classification: F16F

Claim Text:
1. A damping force variable shock absorber comprising: a base shell having an upper opening; a damping force variable valve assembly attached to an outside of the base shell; an inner tube within the base shell; a piston rod within the inner tube, the piston rod being movable in a length direction of the inner tube; a piston valve connected to one end of the piston rod, wherein the piston valve partitions an internal space of the inner tube into a rebound chamber and a compression chamber; a separator tube within a space between the inside of the base shell and the inner tube, wherein the separator tube partitions the space between the inside of the base shell and the inner tube into a low-pressure chamber and a high-pressure chamber; a rod guide, the upper opening of the base shell being closed by the rod guide; and an amplitude selective valve inside the rod guide, the amplitude selective valve comprising: wherein the amplitude selective valve and the damping force variable valve assembly are installed on a serial passage between the rebound chamber and the low-pressure chamber.