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Shock absorbing struts for aircraft landing gear

  • US 4,597,548 A
  • Filed: 06/17/1983
  • Issued: 07/01/1986
  • Est. Priority Date: 06/17/1983
  • Status: Expired due to Term
First Claim
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1. A shock absorbing airplane landing gear strut comprising:

  • a first fluid containing chamber;

    a second fluid containing chamber;

    a ground contacting member;

    means for connecting said first and second chambers between the body of said airplane and said ground contacting member;

    means for varying the volume of at least one of said chambers responsive to loads applied to said ground contacting member on landing or taxiing of said airplane;

    first fluid flow path means connected between said chambers including a first orifice therein,second fluid flow path means connected between said chambers in parallel with said first path and including a second orifice therein;

    means for varying the area of at least one said orifices including a spool valve normally blocking said at least one orifice, responsive to the magnitude of said load exceeding a predetermined threshold;

    means for sensing the pressure in one of said chambers; and

    means connected to said pressure sensing means for producing a signal responsive to said load exceeding said threshold for moving said spool valve to open said orifice, the area of the other of said orifices being independently varied responsive to loads applied to said strut.

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