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Suspension unit

  • US 5,080,392 A
  • Filed: 04/26/1990
  • Issued: 01/14/1992
  • Est. Priority Date: 04/26/1990
  • Status: Expired due to Fees
First Claim
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1. An auxiliary shock absorbing unit for mounting parallel to a suspension system, comprising a housing means defining a cavity therein;

  • a piston means slidable in said housing means;

    first, second and third chamber means;

    a displaceable separation means defining and separating said second and third chamber means, said second chamber means being also delimited by said piston means and defining therein a first orifice means between said piston means and said separation means;

    a first passage means defined between said first and second chamber means, said first and second chamber means containing a working fluid with said third chamber means comprising a high pressure accumulator;

    an actuating means for positioning a valve means into one of at least a first and a second position thereof, wherein said valve means is adapted in said first position to allow fluid transfer through said first passage means and in said second position to block said first passage means whereby, in said second position of said valve means, a movement of said piston means forces a transfer of said working fluid within said second chamber means through said first orifice means thereby producing damping, the working fluid between said first orifice means and said separation means exerting a pressure on said separation means the displacement of which being at least partly opposed by said high pressure accumulator thereby providing a spring force to said auxiliary shock absorbing unit.

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