| 摘要 |
An improved piston compression valve mechanism for a shock absorber includes a seal carrier member carried by the shock absorber piston and having a radially extending flange portion and a downwardly extending cylindrical portion, an o-ring seal mounted between upper and lower radially extending arms on the flange portion, and a coil spring mounted on the piston above the seal carrier member. The lower arm of the flange portion has an inner downwardly facing surface adapted to engage an upwardly facing valve seat on the piston, and the upper arm of the flange portion has an upwardly facing surface in force transmitting contact with the lower end of the coil spring. The cylindrical portion of the seal carrier member is provided with a plurality of flow openings spaced about its circumference and along its axial length which are normally in a closed position against the piston. During a compressive movement of the shock absorber, fluid in the compression chamber of the shock absorber increases its pressure on the outer downwardly facing surface of the flange portion, causing the seal carrier member to slide upwardly on the piston initially without spring resistance and then against increasing spring resistance, thereby gradually exposing the flow openings so as to permit fluid to move from the compression chamber to the rebound chamber in the shock absorber. The improved compression valve mechanism is dependent on fluid pressure, rather than fluid viscosity, resulting in a valve mechanism that reduces shock absorber fade at high fluid temperatures.
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