A fuel pump arrangement has multiple fuel pumps for fitting to aircraft fuel tanks and allowing maintenance of the pumps without requiring access from inside the tanks, particularly one having a housing with two fuel pumps for mounting in or adjacent a single aperture in the wall of a fuel tank, eac
A fuel pump arrangement has multiple fuel pumps for fitting to aircraft fuel tanks and allowing maintenance of the pumps without requiring access from inside the tanks, particularly one having a housing with two fuel pumps for mounting in or adjacent a single aperture in the wall of a fuel tank, each pump being individually removable from the housing by withdrawal away from the tank. A sleeve is moveable also in the same direction as the pump to obstruct inlets in the housing and isolate the housing from the fuel in the tank so the tank need not be drained.
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1. A fuel pump arrangement for mounting in or adjacent an aperture in a wall of a fuel tank, the arrangement comprising: a housing comprising a first cavity and a second cavity arranged side by side, the first cavity having a first axis extending generally perpendicular or obliquely to the wall of t
1. A fuel pump arrangement for mounting in or adjacent an aperture in a wall of a fuel tank, the arrangement comprising: a housing comprising a first cavity and a second cavity arranged side by side, the first cavity having a first axis extending generally perpendicular or obliquely to the wall of the fuel tank, a first fuel inlet disposed in a side of the first cavity, and a first slide valve comprising a first sleeve including a first sleeve aperture that, in use, coincides with the first fuel inlet, the first slide valve being displaceable along the first axis, and the second cavity having a second axis extending generally perpendicular or obliquely to the wall of the fuel tank, a second fuel inlet disposed in a side of the second cavity, and a second slide valve comprising a second sleeve including a second sleeve aperture that, in use, coincides with the second fuel inlet, the second slide valve being displaceable along the second axis;a first fuel pump disposed in the first cavity; anda second fuel pump disposed in the second cavity,wherein withdrawal of the first fuel pump out of the first cavity displaces the first slide valve along the first axis such that the first sleeve obstructs the first fuel inlet so as to isolate the first cavity from the fuel tank, andwherein withdrawal of the second fuel pump out of the second cavity displaces the second slide valve along the second axis such that the second sleeve obstructs the second fuel inlet so as to isolate the second cavity from the fuel tank. 2. The arrangement of claim 1, wherein each cavity includes an outlet including a non-return valve. 3. The arrangement of claim 2, wherein each non-return valve includes a valve flap and guide plate supporting the valve flap on the housing. 4. The arrangement of claim 3, wherein the guide plate is held in place by a removable fixing, and wherein the guide plate is rotatable for dismantling when the removable fixing is removed. 5. The arrangement of claim 4, wherein the removable fixing comprises a single fixing. 6. The arrangement of claim 2, wherein each non-return valve is withdrawable from its respective cavity using access from that respective cavity once that cavity's respective pump has been removed. 7. The arrangement of claim 1, wherein the housing is comprised of fiber-reinforced plastic. 8. The arrangement of claim 7, wherein the fiber-reinforced plastic comprises PEEK that is reinforced with 20% to 35% carbon fibers. 9. The arrangement of claim 1, wherein the housing further includes a mesh strainer formed around the fuel inlets, externally of the housing. 10. The arrangement of claim 9, wherein the housing is comprised of a fiber-reinforced plastic, and wherein the strainer is bonded to the plastic of the housing. 11. The arrangement of claim 1, wherein each cavity includes a vapor discharge valve located in the housing. 12. The arrangement of claim 11, wherein each vapor discharge valve is removable from within its respective cavity when the respective pump is removed from the respective cavity. 13. The arrangement of claim 1, wherein the housing further includes a flanged base portion for securing the housing to, or adjacent, the wall of the fuel tank, wherein the flanged base portion surrounds the first and second cavities, andwherein the first and second cavities are accessible from outside of the fuel tank, and allow removal of the first and second cavity's respective pumps from outside the fuel tank. 14. The arrangement of claim 1, wherein the housing is adhesively bonded or bondable directly to the fuel tank or a fuel tank supporting structure. 15. The arrangement of claim 1, wherein rotation of the first fuel pump after the first slide valve obstructs the first fuel inlet separates the first fuel pump from the first slide valve, and wherein rotation of the second fuel pump after the second slide valve obstructs the second fuel inlet separates the second fuel pump from the second slide valve. 16. A method of servicing the fuel pump arrangement of claim 1, the arrangement being disposed at least partially within the fuel tank, the method comprising: disposing one of the fuel pumps in a respective one of the cavities of the arrangement;partially withdrawing the one fuel pump from the respective cavity together with the slide valve of the one fuel pump; andwithdrawing the one fuel pump fully from the respective cavity leaving the slide valve to isolate the cavity from the fuel tank. 17. The method of claim 16, further comprising draining the fuel tank then removing any one or more parts of the fuel pump arrangement including the slide valve, a non-return valve, and a vapor discharge valve, from the fuel tank and the respective cavity using access to the cavity from the outside of the fuel tank.
Cotton Kenneth J. (Caro MI) Herndon James A. (Cass City MI) Roche Ronald H. (Cass City MI) Stark John S. (Cass City MI) Werner Matthew L. (Caro MI), Liquid propane fuel delivery system.
Gollehur, Robert J.; Miller, Stephen H.; Cannon, Marcel R.; Freiwald, John T.; Balgaard, Steven P.; Jensen, Charles E.; Brower, Anthony J., Vehicle body panel access feature.
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