Pressure controlled suspension damper

  • US 20020108827A1
  • Filed: 02/09/2001
  • Published: 08/15/2002
  • Est. Priority Date: 02/09/2001
  • Status: Active Grant
First Claim
Patent Images

1. A suspension damper assembly for a vehicle suspension system comprising:

  • a housing;

    a pumping cylinder axially aligned inside said housing defining a pumping chamber having a piston stroking therein;

    an intermediate cylinder defining an intermediate chamber with said pumping cylinder and an outer chamber with said housing;

    suspension fluid disposed throughout each of said chambers;

    a valve controlling the distribution of fluid between said chambers thereby controlling the amount of vibration damping inside said pumping chamber, said valve comprising;

    a spring actuated member biased to restrict the flow of fluid between said outer chamber and said intermediate chamber;

    an air chamber coupled to a source of pressurized air; and

    a bellows disposed inside said air chamber exerting counter-force upon said spring relative to the air pressure inside said air chamber thereby increasing the amount of fluid flowing between said outer chamber and said intermediate chamber.

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