Patent ID: 7413064

Claim:
A front fork, comprising: a pair of hydraulic shock absorbers each mounted in the right side and left side of a front wheel for a two-wheel vehicle, wherein: each of the pair of the hydraulic shock absorbers includes: a cylinder; a piston rod inserted in the cylinder to enter into and go out from the cylinder; a piston received in the cylinder and connected to the piston rod, the piston defining a rod-side oil chamber and a piston-side oil chamber inside the cylinder and having a first flow passage to communicate the rod-side oil chamber with the piston-side oil chamber, and a reservoir communicated through a second flow passage with the rod-side oil chamber and the piston-side oil chamber, but wherein: only one of the pair of the hydraulic shock absorbers further includes: a contraction-side damping valve disposed in the first flow passage, the contraction-side damping valve permitting an operating oil to flow from the piston-side oil chamber to the rod-side oil chamber when travel of the piston decreases a volume in the piston-side oil chamber, and prohibiting the operating oil to enter from the rod-side oil chamber to the piston-side oil chamber when travel of the piston increases the volume in the piston-side oil chamber, and a contraction-side check valve disposed in the second flow passage, the contraction-side check valve prohibiting the operating oil to flow from the piston-side oil chamber to the reservoir when travel of the piston decreases the volume in the piston-side oil chamber, and permitting the operating oil to flow from the reservoir to the piston-side oil chamber when travel of the piston increases the volume in the piston-side oil chamber; and wherein the only one of the pair of the hydraulic shock absorbers lacks an expansion-side damping valve and an expansion-side check valve.