Traitement en cours

Veuillez attendre...

Paramétrages

Paramétrages

Aller à Demande

1. US6406088 - Crash rail for a vehicle

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

What is claimed is:

1. A crash rail for a vehicle comprising:
a root portion which can be anchored to a part of the vehicle;
a tip portion which is spaced apart from the root portion and which is located nearer a potential impact point of the vehicle when the root portion is anchored to the said part of the vehicle; and
a middle portion which extends from the root portion to the tip portion; wherein:
the crash rail comprises a wall which defines a groove or a cavity in the crash rail;
the groove or the cavity in the crash rail has a cross-sectional area which increases gradually from the tip portion to the root portion;
the wall has a thickness which increases gradually from the tip portion to the root portion;
the wall is composed of a composite material having fibres set in a resin material;
the crash rail can be crushed when the vehicle impacts with another object to thereby absorb energy of the impact;
during the impact the crash rail disintegrates with the resin separating from the fibres set therein; and
during the impact the crash rail disintegrates progressively with the tip portion disintegrating first and then the middle portion and lastly the root portion.
 
2. A crash rail as claimed in claim 1 wherein the wall comprises longitudinal fibres which extend along the wall from the root portion towards the tip portion.
 
3. A crash rail as claimed in claim 2 wherein all of the longitudinal fibres extend from the root portion, the longitudinal fibres being arranged in bundles of different lengths, some of the fibres extending to the tip portion and the rest being of graduated length so as to stop short of the tip portion.
 
4. A crash rail as claimed in claim 3 wherein each bundle of longitudinal fibres is arranged so that each fibre lies side by side to form a lamina of defined length and each bundle forms a separate lamina of different length.
 
5. A crash rail as claimed in claim 2 wherein the wall comprises additionally multidirectional fibres distributed along the length of the crash rail.
 
6. A crash rail as claimed in claim 5 wherein the multidirectional fibres are present in a mat set in the resin material.
 
7. A crash rail as claimed in claim 5 wherein the multidirectional fibres are provided near the surface of the wall of the crash rail.
 
8. A crash rail as claimed in claim 5 wherein at the tip portion of the crash rail the percentage of the wall which comprises the multidirectional fibres is greater than the percentage of the wall comprising the multidirectional fibres at the root portion.
 
9. A crash rail as claimed in claim 5 wherein at the root portion of the crash rail the percentage of the wall which comprises longitudinal fibres is greater than the percentage of the wall comprising the longitudinal fibres at the tip portion.
 
10. A crash rail as claimed in claim 1 which is formed as a single piece hollow moulding with a cavity extending therethrough.
 
11. A crash rail as claimed in claim 10 wherein the cavity is of generally square cross-section.
 
12. A crash rail as claimed in claim 10 wherein the cavity is of generally rectangular cross-section.
 
13. A crash rail as claimed in claim 10 wherein the cavity is of generally circular cross-section.
 
14. A crash rail as claimed in claim 1 comprising two moulded portions each having a groove, whereby when the moulded portions are joined together the grooves in the moulded portions co-operate together to define a cavity extending along the crash rail.
 
15. A crash rail as claimed in claim 14 wherein the grooves are each U-shaped and together define a square cross-section cavity.
 
16. A crash rail as claimed in claim 14 wherein the grooves are each U-shaped and together define a rectangular cross-section cavity.
 
17. A crash rail as claimed in claim 14 wherein the grooves are each of semi-circular section and together define a circular cross-section cavity.
 
18. A crash rail as claimed in claim 14 wherein each moulded portion has two flanges adjacent the groove therein and the flanges of the moulded portions are adhered together to join the moulded portions.
 
19. A crash rail as claimed in claim 1 comprising two corrugated moulded portions each having a pair of parallel spaced apart grooves which when the moulded portions are joined together form a pair of parallel extending cavities.
 
20. A crash rail as claimed in claim 19 wherein the pair of grooves are both U-shaped and together define square cross-section cavities.
 
21. A crash rail as claimed in claim 19 wherein the pair of grooves are both U-shaped and together define rectangular cross-section cavities.
 
22. A crash rail as claimed in claim 19 wherein the pair of grooves are both of semi-circular section and together define circular section cavities.
 
23. A crash rail as claimed in claim 19 wherein the moulded portions each have flanges moulded adjacent the grooves therein and each flange of one moulded portion is adhered to a facing flange of the other moulded portion to join the moulded portions.
 
24. A crash rail as claimed in claim 1 comprising a corrugated moulded portion having a groove and a panel joined to the moulded portion, the panel having a generally flat surface which defines with the groove a cavity extending along the crash rail.
 
25. A crash rail as claimed in claim 24 wherein the groove is U-shaped and defines with the generally flat surface a square cross-section cavity.
 
26. A crash rail as claimed in claim 24 wherein the groove is U-shaped and defines with the generally flat surface a rectangular cross-section cavity.
 
27. A crash rail as claimed in claim 24 wherein the groove is semi-circular and defines with the generally flat surface a semi-circular cross-section cavity.
 
28. A crash rail as claimed in claim 1 comprising a moulded portion having a pair of parallel extending grooves and a panel joined to the moulded portion, wherein the panel has a generally flat surface which defines with the grooves a pair of spaced apart cavities extending along the crash rail.
 
29. A crash rail as claimed in claim 28 wherein the grooves are U-shaped and define with the generally flat surface square cross-section cavities.
 
30. A crash rail as claimed in claim 28 wherein the grooves are U-shaped and define with the generally flat surface rectangular cross-section cavities.
 
31. A crash rail as claimed in claim 28 wherein the grooves are semi-circular and define with the generally flat surface semi-circular cross-section cavities.
 
32. A crash rail as claimed in claim 24 wherein the panel is adhered to the moulded portion by an adhesive which permits the panel to peel away from the moulded portion as the moulded portion disintegrates during impact.
 
33. A crash rail as claimed in claim 32 wherein the moulded portion has flanges to which the generally flat surface of the panel is adhered to join the moulded portion to the panel.
 
34. A crash rail as claimed in claim 33 wherein the generally flat surface-is slightly corrugated at least in those regions of the panel which are adhered to the flanges, the corrugations in the generally flat surfaces leaving areas where the adhesive does not interconnect the flanges and such areas acting to impede the spread of cracks through the adhesive.
 
35. A wheeled motor vehicle having a passenger cabin and a bumper located forward of the passenger cabin and a crash rail as claimed in claim 1 interconnecting the passenger cabin and the bumper.
 
36. A wheeled motor vehicle having a passenger cabin and a bumper located forward of the passenger cabins and a plurality crash rails each as claimed in claim 1, each crash rail being spaced apart from the other crash rails and each crash rail interconnecting the passenger cabin and the bumper.
 
37. A wheeled motor vehicle having a passenger cabin, an engine in an engine bay located forward of the passenger cabin, a bumper located forward of the engine bay and a pair of crash rails each as claimed in claim 1 interconnecting the passenger cabin and the bumper in spaced part configuration with one on either side of the engine bay.
 
38. A wheeled motor vehicle having a passenger cabin, an engine in an engine bay located forward of the passenger cabin, a bumper located forward of the engine bay and a pair of crash rails each as claimed in claim 24 wherein the panel of each crash rail has a surface which provides a liner surface for the engine bay.
 
39. A wheeled motor vehicle having a passenger cabin and a bumper located to the rear of the passenger cabin and a crash rail as claimed in claim 1 interconnecting the passenger cabin (10) and the bumper.
 
40. A wheeled motor vehicle having a passenger cabin and a bumper located to the rear of the passenger cabin (10) and a plurality crash rails each as claimed in claim 1, each rail being spaced apart and interconnecting the passenger cabin and the bumper.
 
41. A wheeled motor vehicle having a passenger cabin, an engine in an engine bay located to the rear of the passenger cabin, a bumper located to the rear of the engine bay and a pair of crash rails each as claimed in claim 1 interconnecting the passenger cabin and the bumper in spaced apart configuration with one on either side of the engine.
 
42. A wheeled motor vehicle having a passenger cabin, an engine in an engine bay located to the rear of the passenger cabin, a bumper located to the rear of the engine bay and a pair of crash rails each as claimed in claim 24 wherein the panel of each crash rail has a surface which provides a liner surface for the engine bay.
 
43. A wheeled motor vehicle as claimed in claim 35 wherein the crash rail or rails are connected to the passenger cabin by slotting the end or ends of the rail or rails into matching slots in uprights attached to the passenger cabin.