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1. WO1999001677 - ENSEMBLE TIGE DE PISTON ET PISTON

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 piston rod and piston assembly comprising:
a piston assembly including a piston formed from a moldable material ; and
a thin-walled tubular piston rod having an exterior surface with a piston attachment portion shaped to receive said piston, said piston being molded on said piston rod such that fastener connection elements are not needed to couple said piston to said piston rod.

2. A piston rod and piston assembly as in claim 1, wherein said piston attachment portion of said piston rod includes at least one groove for receiving said piston during molding of said piston on said piston rod.

3. A piston rod and piston assembly as in claim 1, wherein said piston attachment portion of said piston rod includes at least one knurl for receiving said piston during molding of said piston on said piston rod.

4. A piston rod and piston assembly as in claim 1, wherein said piston attachment portion of said piston rod includes dimples for receiving said piston during molding of said piston on said piston rod.

5. A piston rod and piston assembly as in claim 1, wherein said exterior surface of said piston rod is chrome plated.

6. A piston rod and piston assembly as in claim 5, wherein said piston rod is formed of steel.

7. A piston rod and piston assembly as in claim 5, wherein said piston is formed of plastic injection molded onto said piston attachment portion of said piston rod.

8. A piston rod and piston assembly as in claim 7, wherein said plastic is nylon 6,6.

9. A piston rod and piston assembly as in claim 1, wherein holes are formed through said piston rod on each side of said piston, thereby forming a fluid passage from a first side of said piston, through said piston rod, and to a second side of said piston.

10. A piston rod for use in a suspension system of a bicycle suspension fork, said piston rod being a thin-walled tubular chromed steel rod.

11. A piston rod as in claim 10, wherein said wall of said piston rod is approximately 0.0275 inches.

12. A piston rod as in claim 10, wherein said piston rod has an exterior surface with a piston attachment portion, said exterior surface being plated with chrome except at said piston attachment portion.

13. A piston rod as in claim 12, further comprising a piston formed on said piston attachment portion.

14. A piston rod as in claim 13, wherein said piston is molded on said piston attachment portion such that fastener connection elements are not needed to couple said piston to said piston rod.

15. A piston rod as in claim 13, wherein holes are formed through said piston rod on each side of said piston, thereby forming a fluid passage from a first side of said piston, through said piston rod, and to a second side of said piston such that said piston rod is usable in a damping system of the bicycle suspension fork.

16. A piston rod as in claim 10, wherein said -piston rod has a first end and a second end, said piston rod further comprising an insert positioned within and coupled to said second end of said piston rod, said insert coupling said piston rod to the bicycle suspension fork.

17. A piston rod as in claim 16, wherein said insert and said second end of said piston rod are crimped together.

18. A piston rod as in claim 16, wherein said insert includes a knurled outer surface enabling said insert to cut a seat in the bicycle suspension fork and thereby secure said piston rod to the bicycle suspension fork.

19. A method of forming a piston rod for use in a bicycle suspension fork, said method comprising the steps of:
providing a thin-walled tubular piston rod; and
forming a piston on said piston rod such that fastener connection elements are not needed to couple said piston to said piston rod.

20. A method as in claim 19, wherein:
said tubular rod is plated with chrome except at a piston attachment portion; and
said piston is coupled to said piston attach-ment portion on said tubular rod.

21. A method as in claim 20, wherein said piston is injection molded onto said piston attachment portion.