초록 ▼

A non-return valve for a fuel tank, the valve comprising a substantially tubular body and a deformable shutter member fixed to said body, said shutter member being formed integrally by molding a plastics material and being shaped in such a manner as to return under its own elasticity into a shut pos

A non-return valve for a fuel tank, the valve comprising a substantially tubular body and a deformable shutter member fixed to said body, said shutter member being formed integrally by molding a plastics material and being shaped in such a manner as to return under its own elasticity into a shut position, with the valve body serving as a seat, whenever the shutter member is at rest and the pressure of fuel is no longer sufficient to overcome the elastic return action of the shutter member.

대표청구항 ▼

1. A fuel tank comprising a non-return valve comprising a body having a substantially tubular part and a portion spaced from said tubular part, an elastic deformable shutter member capable of taking a closed position and an open position, said deformable shutter having a flexible portion

1. A fuel tank comprising a non-return valve comprising a body having a substantially tubular part and a portion spaced from said tubular part, an elastic deformable shutter member capable of taking a closed position and an open position, said deformable shutter having a flexible portion having a region in contact with said tubular part in said closed position and spaced apart from said tubular part in said open position, a stud made integrally with said flexible portion, said stud being fixed to said portion of the body spaced from said tubular part. 2. A fuel tank according to claim 1, wherein, in said closed position, the periphery of said flexible portion rests against one end of said tubular part. 3. A fuel tank according to claim 1, wherein said flexible portion and said stud are made of elastomer. 4. A fuel tank according to claim 1, wherein said body has an outside collar fixed on said fuel tank. 5. A fuel tank according to claim 1, wherein said stud is snapped on said body. 6. A fuel tank according to claim 1, wherein said stud has an annular groove. 7. A fuel tank according to claim 1, wherein said flexible portion is flat around an opening of an internal cavity of said stud. 8. A fuel tank according to claim 1, wherein said body has a holed portion for fixing said stud and wherein said stud extends through said holed portion. 9. A fuel tank according to claim 1, wherein said valve is made of two pieces only. 10. A fuel tank according to claim 1, wherein said body has a first portion extending outwardly of a wall of the fuel tank and a second portion extending inwardly of said wall. 11. A fuel tank according to claim 1, wherein said flexible portion has an overall concave face facing toward said body in said closed position. 12. A fuel tank comprising a non-return valve comprising a body having a substantially tubular part and a portion spaced from said tubular part, an elastic deformable shutter member capable of taking a closed position and an open position, said deformable shutter having a flexible portion having a region in contact with said tubular part in said closed position and spaced apart from said tubular part in said open position, a hollow stud made integrally with said flexible portion, said stud being fixed to said portion of the body spaced from said tubular part. 13. A fuel tank according to claim 12, wherein, in said closed position, the periphery of said flexible portion rests against one end of said tubular part. 14. A fuel tank according to claim 12, wherein said flexible portion and said stud are made of elastomer. 15. A fuel tank according to claim 12, wherein said body has an outside collar fixed on said fuel tank. 16. A fuel tank according to claim 12, wherein said stud is snapped on said body. 17. A fuel tank according claim 12, wherein said stud has an annular groove. 18. A fuel tank according to claim 12, wherein said flexible portion is flat around an opening of an internal cavity of said stud. 19. A fuel tank according to claim 12, wherein said body has a holed portion for fixing said stud and wherein said stud extends through said holed portion. 20. A fuel tank according to claim 12, wherein said valve is made of two pieces only. 21. A fuel tank according to claim 12, wherein said body has a first portion extending outwardly of a wall of the fuel tank and a second portion extending inwardly of said wall. 22. A fuel tank according to claim 12, wherein said flexible portion has an overall concave face facing toward said body in said closed position. 23. A fuel tank according to claim 12, wherein said hollow stud has a cavity opening out at a first end on a concave face of said flexible portion and closed at a second end opposite the first end. 24. A fuel tank according to claim 23, wherein said cavity has cross-section that decreases from the first to the second end.