Shock absorber
OwnerSen-Hsiang CHOUinventor
Life of this patent
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Abstract
A shock absorber has an upper cylinder, a piston valve mounted on a lower end of the upper cylinder, a free piston slidably mounted in the upper cylinder and dividing the upper cylinder into an air chamber and an upper oil chamber, a lower cylinder slidably mounted around the lower end of the upper cylinder and has a lower oil chamber. Since the free piston and the air chamber are disposed in the upper cylinder, the shock absorber has a compact structure. Furthermore, when the upper and lower cylinders slide relatively, the free piston slides accordingly to regulate volume of the upper oil chamber and to provide a damping effect. The hydraulic oil in the shock absorber does not contact air and therefore no air permeates into the hydraulic oil.
Claims20
A shock absorber comprising
- an upper cylinder module having
- an upper cylinder;
- a top cap mounted on an upper end of the upper cylinder;
- and
- a piston valve securely mounted on a lower end of the upper cylinder;
- a free piston slidably mounted in the upper cylinder;
- an air chamber defined in the upper cylinder and between the top cap and the free piston;
- an upper oil chamber defined in the upper cylinder and between the free piston and the piston valve;
- a lower cylinder module having
- a lower cylinder mounted around the lower end of the upper cylinder and being slidable relative to the upper cylinder;
- and
- a bottom cap mounted on a lower end of the lower cylinder;
- and
- a lower oil chamber defined in the lower cylinder and between the piston valve and the bottom cap.
Dependencies are inferred from the claim text.