Patent ID: 7213787
Filing Date: 2007-05-08
Classification: B64D,F16L

Abstract:
1. An aircraft, comprising: a fuselage portion; a wing portion; a fuel tank carried by at least one of the fuselage portion and the wing portion; a first conduit coupled to the fuel tank, the first conduit having a first wall aligned with a flow direction in the first conduit; a second conduit disposed annularly around the first conduit, the second conduit having a second wall aligned with the flow direction; an access channel having an aperture in fluid communication with the first conduit, the access channel being isolated from fluid communication with the second conduit; a valve element in fluid communication with the access channel, the valve element being movable between a first position and a second position, the valve element being positioned to allow a first amount of flow through the access channel when in the first position, the valve element being positioned to allow no flow or a second amount of flow less than the first amount of flow through the access channel when in the second position; and a valve unit carrying the valve element, the valve unit including: