Patent ID: 11879517
Assignee: KYB CORPORATION
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F  B | IPC F

Claim 0:
1. A shock absorber comprising:
a cylinder;
a piston inserted into the cylinder in a state allowing movement in an axial direction and demarcating an interior of the cylinder into an extension side chamber and a compression side chamber;
a piston rod having one end joined to the piston and another end that projects out from the cylinder;
a tank, connected to the compression side chamber, that pressurizes an interior of the cylinder;
a hard side damping element that imparts a resistance to a flow of a liquid moving between the extension side chamber and the compression side chamber;
a solenoid valve configured to change an aperture area of a bypass passage that bypasses the hard side damping element and communicates with the extension side chamber and the compression side chamber; and
a soft side damping element provided in series with the solenoid valve in the bypass passage, wherein
the hard side damping element includes an orifice and a leaf valve provided in parallel with the orifice, and
the soft side damping element includes a large-diameter orifice having a larger aperture area than the orifice of the hard side damping element.