Patent ID: 9163690
Filing Date: 2015-10-20
Classification: F16F

Abstract:
1. A hydraulic shock absorber comprising: a damper tube; a rod guide disposed in one open end portion of the damper tube; a support piece disposed in the other end portion of the damper tube; a cylinder inserted inside the damper tube and sandwiched and secured between the rod guide and the support piece in the axial direction, the cylinder being multiple-walled with N units of tubes fitted together; and a piston rod penetrating the rod guide and slidably inserted inside the innermost tube of the cylinder, wherein contact surfaces, where at least one end surface of (N−1) units of tubes of the cylinder is in contact with a seating surface of at least one of the rod guide and the support piece in the axial direction, are formed at a plurality of discrete circumferential positions on the end surface of the tubes in the state where the tubes of the cylinder are sandwiched and secured.