Front fork
AssigneeKayaba Industry Co., Ltd.
InventorKen Furuya
Life of this patent
Estimating the term…
Abstract
One of a pair of the hydraulic shock absorbers each mounted in the right and left sides of a front wheel for a two-wheel vehicle includes a contraction-side damping valve (5a) disposed in a flow passage (11) communicating a rod-side oil chamber (R1) with a piston-side oil chamber (R2), the contraction-side damping valve (5a) permitting an operating oil to flow from the piston-side oil chamber (R2) to the rod-side oil chamber (R1) only when a volume in the piston-side oil chamber (R2) is reduced, and a contraction-side check valve (6) disposed in a flow passage (10) communicating the piston-side oil chamber (R2) with the reservoir (R), the contraction-side check valve (6) permitting the operating oil to flow from the reservoir (R) to the piston-side oil chamber (R2) only when a volume in the piston-side oil chamber (R2) is increased.
Claims4
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.
A front fork, comprising:
- a pair of hydraulic shock absorbers each mounted in the right side and left sides 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:
- an expansion-side damping valve disposed in the first flow passage, the expansion-side damping valve permitting an operating oil to flow from the rod-side oil chamber to the piston-side oil chamber when travel of the piston decreases a volume in the rod-side oil chamber, and prohibiting the operating oil to enter from the piston-side oil chamber to the rod-side oil chamber when travel of the piston increases the volume in the rod-side oil chamber, and
- an expansion-side check valve disposed in the second flow passage, the expansion-side check valve prohibiting an operating oil to flow from the reservoir to the rod-side oil chamber when travel of the piston decreases the volume in the rod-side oil chamber, and permitting the operating oil to flow from the reservoir to the rod-side oil chamber when travel of the piston increases the volume in the rod-side oil chamber;
- and
- wherein the only one of the pair of the hydraulic shock absorbers lacks a contraction-side damping valve and a contraction-side check valve.
Dependencies are inferred from the claim text.