Patent ID: 9108738
Filing Date: 2015-08-18
Classification: B64D,F17C

Abstract:
1. An apparatus comprising: a number of fuel tanks, each fuel tank in the number of fuel tanks comprising a number of branches; a refueling system for the number of fuel tanks, wherein the refueling system has a manifold configured to supply fuel to the number of fuel tanks through the number of branches, each of the number of branches comprising: a primary branch in the number of branches, the primary branch connected to the manifold at a first end of the primary branch, a second end of the primary branch providing fuel to a fuel tank in the number of fuel tanks; a primary valve associated with the primary branch downstream of the first end of the primary branch; an orifice plate positioned in the primary branch downstream of the primary valve, the orifice plate sized for a vent overfill condition at a maximum allowed fueling pressure; a secondary branch having a first end and a second end, each end connected to the primary branch, wherein a first end of the secondary branch is connected to the primary branch in a location downstream from the primary valve and upstream from the orifice plate in the primary branch and the second end of the secondary branch is positioned downstream from the orifice plate; and a secondary valve associated with the secondary branch, between the first end and the second end of the secondary branch, wherein the primary valve and the secondary valve are independently controlled, and wherein the secondary valve is downstream from the primary valve.