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Fittings with redundant seals for aircraft fuel lines, fuel tanks, and other systems

  • US 7,533,850 B2
  • Filed: 12/12/2005
  • Issued: 05/19/2009
  • Est. Priority Date: 06/09/2005
  • Status: Expired due to Fees
First Claim
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1. An aircraft system, comprisinga fuel tank having a tank wall with an inner surface, an outer surface, and an aperture extending from the inner surface to the outer surface;

  • anda fluid-tight fitting positioned in the aperture, the fitting including;

    a first member having a flange and a barrel, the flange being aligned generally parallel with the tank wall, the barrel having a first portion extending through the tank aperture and a second portion extending away from the tank, the barrel further having a passageway;

    a fastener connected to the first portion of the barrel;

    a first flange seal between the flange and the tank wall;

    a second flange seal between the flange and the tank wall, the second flange seal being disposed generally radially outwardly from the first flange seal;

    a second member positioned within the passageway of the barrel;

    a first barrel seal positioned between the second member and barrel; and

    a second barrel seal positioned between the second member and the barrel.

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