A low permeation weldable fuel tank assembly is provided to reduce fuel vapor permeation from a fuel tank. The weldable fuel tank assembly has a mounting portion mountable to the fuel tank and a valve housing that is attachable to the mounting portion. In one aspect, the mounting portion includes a
A low permeation weldable fuel tank assembly is provided to reduce fuel vapor permeation from a fuel tank. The weldable fuel tank assembly has a mounting portion mountable to the fuel tank and a valve housing that is attachable to the mounting portion. In one aspect, the mounting portion includes a fuel vapor permeation barrier. In another aspect, an anti-permeation cap with a fuel vapor permeation barrier is affixed to a portion of a tank assembly.
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That which is claimed is: 1. A fuel system apparatus for weldable attachment to a fuel tank, the fuel system apparatus comprising: a mounting portion defining a passageway in communication with an inside of the fuel tank, the mounting portion including a multi-layer permeation barrier having multip
That which is claimed is: 1. A fuel system apparatus for weldable attachment to a fuel tank, the fuel system apparatus comprising: a mounting portion defining a passageway in communication with an inside of the fuel tank, the mounting portion including a multi-layer permeation barrier having multiple layers including a weldable layer, the multi-layer permeation barrier configured to block fuel vapor permeation from about the mounting portion, the mounting portion further including a weld foot defining an exterior side and an interior side, the sides configured for welding to a surface of the fuel tank at respective weldpoints, the multi-layer permeation barrier being disposed at least within the weld foot and configured within the weld foot such that the sides of the weld foot are welded to the fuel tank surface at the respective weldpoints, the multi-layer permeation barrier being spaced apart from the weldpoints; and a valve assembly attached to the mounting portion and at least partially disposed in the inside of the fuel tank and configured to selectively open or close communication between the passageway to the inside of the fuel tank. 2. The fuel system apparatus of claim 1, wherein the multi-layer permeation barrier is disposed on the weldable layer spaced apart from the surface of the fuel tank. 3. The fuel system apparatus of claim 1, wherein the multi-layer permeation barrier is selected from the group consisting of a polymer, a metal, an adhesive, an anti-permeation material, and combinations thereof. 4. The fuel system apparatus of claim 3, wherein the polymer is one of an HDPE or a conductive HDPE. 5. The fuel system apparatus of claim 3, wherein the anti-permeation material is EVOH. 6. The fuel system apparatus of claim 1, wherein the mounting portion is comprised substantially of the multi-layer permeation barrier and defines a mounting surface and further including an interface disposed between the mounting surface and the valve assembly, the interface having a complementary surface configured for attachment to the mounting surface. 7. The fuel system apparatus of claim 6, wherein the mounting portion defines an extension spaced apart from the interface with the weldable layer forming a portion of the weldable extension, the multi-layer permeation barrier disposed on the weldable extension such that the multi-layer permeation barrier is spaced apart from the surface. 8. The fuel system apparatus of claim 6, further comprising means for sealing the valve assembly and the interface together. 9. The fuel system apparatus of claim 8, wherein the means for sealing is selected from the group consisting of an o-ring, a sealant, a gasket, and combinations thereof. 10. The fuel system apparatus of claim 1, wherein the mounting portion is unitarily formed with the weld foot. 11. The fuel system apparatus of claim 1, wherein the multi-layer permeation barrier is only in the weld foot. 12. The fuel system apparatus of claim 1, wherein the mounting portion defines a nozzle having an outlet and a sleeve disposed in the nozzle, the outlet in communication with an atmosphere external to the fuel tank, the sleeve configured to increase a rigidity of the nozzle. 13. A fuel vapor control valve for weldable attachment to a fuel tank, the fuel vapor control valve comprising: a mounting portion connectable to a surface of the fuel tank, the mounting portion defining a passageway in communication with an inside of the fuel tank, the mounting portion having a weld foot defining an exterior side and an interior side, the weld foot sides weldable to a surface of the fuel tank; a valve assembly attached to the mounting portion for selectively opening and closing the flow through the passageway; and an anti-permeation portion attached to and substantially covering the mounting portion spaced apart from the weld foot sides welded at the surface, wherein the anti-permeation portion is configured to block fuel vapor permeation from the fuel tank, the anti-permeation portion comprising a multi-layer permeation barrier. 14. The fuel system apparatus of claim 13, wherein the multi-layer permeation barrier is made from a material selected from the group consisting of a polymer, a metal, an adhesive, an anti-permeation material, and combinations thereof. 15. The fuel system apparatus of claim 13, wherein the mounting portion defines a nozzle having an outlet in communication with an atmosphere apart from the fuel tank, the multi-layer permeation barrier disposed on the nozzle such that the fuel vapor permeation is reduced from the nozzle. 16. The fuel system apparatus of claim 13, further comprising a nozzle having an outlet in communication with an atmosphere apart from the fuel tank, wherein the nozzle is configured for connection to the mounting portion and to a fuel vapor recovery canister spaced apart from the fuel tank. 17. The fuel system apparatus of claim 16, wherein the nozzle includes a sleeve disposed in the nozzle, the sleeve configured to increase a rigidity of the nozzle. 18. The fuel system apparatus of claim 13, wherein the anti-permeation portion includes EVOH. 19. A method for attaching an anti-permeation portion to a fuel vapor control valve for weldable attachment to a fuel tank, the method comprising the steps of: a) providing a mounting portion connectable to a surface of the fuel tank, the mounting portion having a weld foot defining an exterior side and an interior side, the sides weldable to the surface; b) extruding an anti-permeation portion with the mounting portion; and c) attaching the mounting portion such that the anti-permeation portion is spaced apart from the surface and the weld foot sides are welded to the surface, wherein the anti-permeation portion is configured to block fuel vapor permeation from the fuel tank, the anti-permeation portion comprising a multi-layer permeation barrier. 20. The method as in claim 19, wherein the attaching step is selected from one of a welding step, an adhesive step, a mechanical affixation step, and combinations thereof. 21. The method as in claim 19, wherein the multi-layer permeation barrier includes EVOH. 22. The method as in claim 19, further including the step of welding the weld foot to the surface of the fuel tank. 23. The method as in claim 19, further including the step of inserting a nozzle in the mounting portion subsequent to or substantially simultaneously with attaching the anti-permeation portion. 24. The method as in claim 23, further including the step of inserting a sleeve in the nozzle, the sleeve configured to increase a rigidity of the nozzle.
Van Schaftingen, Jules-Joseph; Leonard, Stephane; Gerard, Yannick; Dougnier, Fran?ois; Op De Beeck, Jo?l; Wouters, Paul, System and method for closing a tank opening.
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