An obturating assembly includes a body having an aperture for passage to the pipe of a fuel supply spout of predetermined outer diameter and an obturator that is moveable with respect to the body. In accordance with the invention, the head further includes an access assembly having a shell through w
An obturating assembly includes a body having an aperture for passage to the pipe of a fuel supply spout of predetermined outer diameter and an obturator that is moveable with respect to the body. In accordance with the invention, the head further includes an access assembly having a shell through which the spout must pass before reaching the obturator, the shell having a plurality of flexible tabs generally forming an assembly of funnel shape of which the minor diameter is less than the outer diameter of the spout and of which the major diameter is greater than the outer diameter of the spout.
대표청구항▼
The invention claimed is: 1. A head for a fuel filler pipe of a vehicle, the head comprising an obturating assembly, the obturating assembly further comprising: a body having an aperture for passage to said pipe of a fuel supply spout of predetermined outer diameter; an obturator movable with respe
The invention claimed is: 1. A head for a fuel filler pipe of a vehicle, the head comprising an obturating assembly, the obturating assembly further comprising: a body having an aperture for passage to said pipe of a fuel supply spout of predetermined outer diameter; an obturator movable with respect to said body, able to assume an obturating position in which it conceals said passage aperture and a freeing position in which it does not conceal said passage aperture, said obturator flapping rearwardly and outwardly between said obturating position and said freeing position, said obturator being elastically urged towards said obturating position, said obturator being adapted to be driven by said spout from the obturating position to the freeing position when said spout meets the obturator during a thrusting movement of the spout into the head; and an access assembly having a shell through which the spout must pass before reaching the obturator, said shell having a plurality of flexible tabs generally forming an assembly of funnel shape of which the minor diameter is less than said outer diameter of said spout and of which the major diameter is greater than said outer diameter of said spout so that the minor diameter portion of the assembly of funnel shape bears snugly around the spout; wherein the obturator in the obturating position is obliquely disposed with respect to the thrusting movement of the spout, whereby an angular travel of the obturator between the obturating position and the freeing position is reduced; and wherein the shell is disposed in the access assembly with a radial play configured to allow the shell to be appropriately positioned when it cooperates with the spout. 2. A head according to claim 1, wherein said shell comprises a side wall the general form of which is tubular with a circular section, said flexible tabs being attached at the major diameter end of the funnel-shaped assembly which they form. 3. A head according to claim 2, wherein the minor diameter end of the funnel-shaped assembly formed by said tabs is at the same level as the rear end of said side wall. 4. A head according to claim 2, wherein said flexible tabs are connected to said side wall exclusively at the major diameter end of said funnel-shaped assembly. 5. A head according to claim 2, wherein each said flexible tab is of substantially constant thickness, said side wall having a similar thickness. 6. A head according to claim 1, wherein said access assembly further comprises a cover and a shell support, with, in the assembled state of the access assembly, said shell being disposed in said support and with said support being disposed in said cover, the major diameter end of said funnel-shaped assembly formed by said flexible tabs facing an aperture of said cover whereas the minor diameter end of said funnel-shaped assembly faces an aperture of said shell support, the latter aperture being adapted to allow the passage of said spout. 7. A head according to claim 6, wherein the radial play is between said shell and said shell support. 8. A head according to claim 6, wherein said cover comprises at the rear a skirt of step form provided with tongues for snap-fitting onto at least one of said access assembly or pipe. 9. A head according to claim 1, wherein said body comprises a separating wall disposed within a side wall. 10. A head according to claim 9, wherein said separating wall has a periphery connected in entirety to said side wall. 11. A head according to claim 9, wherein the general form of said side wall is tubular with a circular section. 12. A head according to claim 1, wherein said body has guide means for guiding said spout towards said passage aperture. 13. A head according to claim 12, wherein said guide means, comprise at least one member projecting from the perimeter of said passage aperture towards the front end of said body. 14. A head according to claim 13, wherein a said member projects from a portion of the perimeter of said passage aperture that is the closest to the front end of said body. 15. A head according to claim 13, wherein a said member projects from a portion of the perimeter of said passage aperture that is the furthest from the front end of said body. 16. A head according to claim 13, wherein at least one said member has an inner surface connected to the edge of said passage aperture. 17. A head according to claim 1, wherein it further comprises an obturator support engaged within and fixed to said body, said support being provided with means for flap mounting of said obturator. 18. A head according to claim 17, wherein said flap mounting means are disposed in the vicinity of the front end of the support and are aligned with a chord close to its periphery. 19. A head according to claim 18, wherein said support has an opening in line with said mounting means adapted to house a closure which the obturator comprises. 20. A head according to claim 17, wherein said flap mounting means of the obturator comprise two bosses and two apertures provided in said bosses and in a side wall of said support. 21. A head according to claim 17, wherein said body comprises a separating wall disposed within a side wall; and in that the front end of said support is formed like said separating wall. 22. A head according to claim 17, wherein said obturator comprises lugs for flap mounting, and in that a hinge pin is engaged in said flap mounting means of said support and in said lugs, and in that a helical central portion of a spring is disposed around said hinge pin between said lugs, respective projecting portions of said spring bearing respectively on said obturator and on said body. 23. A head according to claim 17, wherein said body and said support have mutual snap-fitting means.
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이 특허에 인용된 특허 (23)
Vetter,Siegfried; Stephan,Markus, Automatic tank closure for a fuel tank.
Christner Susan A. (1235 S. Maple Rd. ; Apt. 301 Ann Arbor MI 48103) Janda Elaine R. (1235 S. Maple Rd. ; Apt. 301 Ann Arbor MI 48103), Fuel tank tube vapor/fuel seal.
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