Patent ID: 6698731
Filing Date: 2004-03-02
Classification: F16F

Abstract:
A multiple chamber piston for attenuating vibrations in a vehicle, the multiple chamber piston comprising:a bushing having a cylindrical outer surface and including a first fluid chamber connected to a second fluid chamber by a first channel, the bushing further including a third fluid chamber connected to a fourth fluid chamber by a second channel; a first air chamber disposed inbetween the first fluid chamber and the third fluid chamber being open to an environment surrounding the multiple chamber piston; a second air chamber disposed inbetween the second fluid chamber and the fourth fluid chamber being open to an environment surrounding the multiple chamber piston; and an outer metal casing encapsulating an outer circumference of the bushing that seals the first fluid chamber, the second fluid chamber, the third fluid chamber and the fourth fluid chamber; wherein: the first channel follows a contour of the outer cylindrical surface of the bushing when passing between the first fluid chamber and the second fluid chamber, the second channel follows the contour of the outer cylindrical surface when passing between the third fluid chamber and the fourth fluid chamber.