Vehicle step tube
First Claim
1. A vehicle step tube comprising a one-piece extrusion having a longitudinal length and an upper surface, said extrusion including a step portion and a pair of non-step portions flanking said step portion, said extrusion including a plurality of exposed ribs extending upwardly from said upper surface along said length of said extrusion, said ribs having a second height in said step portion and a first height taller than said second height in said non-step portions.
1 Assignment
0 Petitions
Accused Products
Abstract
A vehicle step tube comprising a one-piece elongated extrusion having a plurality of vertical ribs extending from the upper surface. The ribs are relatively short in a step portion of the extrusion to form a step platform. The ribs are relatively tall in the non-step portions flanking the step portion. The ribs define transverse recesses in the step portion to enhance traction and aesthetics.
36 Citations
14 Claims
- 1. A vehicle step tube comprising a one-piece extrusion having a longitudinal length and an upper surface, said extrusion including a step portion and a pair of non-step portions flanking said step portion, said extrusion including a plurality of exposed ribs extending upwardly from said upper surface along said length of said extrusion, said ribs having a second height in said step portion and a first height taller than said second height in said non-step portions.
-
2. A vehicle step tube comprising a one-piece extrusion having a longitudinal length and an upper surface, said extrusion including a step portion and a pair of non-step portions flanking said step portion, said extrusion including a plurality of ribs extending from said upper surface along said length of said extrusion, said ribs having a second height in said step portion and a first height taller than said second height in said non-step portions, selected ones of said ribs defining transverse notches.
- 5. A step tube for attachment to a vehicle comprising a one-piece extrusion including a longitudinal length, a step portion, and opposing non-step portions, said extrusion including an upper surface and a plurality of exposed substantially vertical ribs extending upwardly from said upper surface along said longitudinal length, said ribs defining a first height in said non-step portions and a second height in said step portion, said second height shorter than said first height, said ribs further defining a plurality of transverse recesses within said step portion.
-
10. A method of manufacturing a step tube for a vehicle, comprising the steps of:
-
extruding a one-piece elongated beam having a plurality of exposed ribs extending upwardly from an upper surface; cutting said beam to a desired length having a step portion and opposing non-step portions; and reducing the height of said ribs in the step portion. - View Dependent Claims (13, 14)
-
-
11. A method of manufacturing a step tube for a vehicle, comprising the steps of:
-
extruding a one-piece elongated beam having a plurality of exposed ribs; cutting said one-piece beam to a desired length having a step portion and opposing non-step portions; reducing the height of said ribs in the step portion; and
forming transverse recesses in said ribs in the step portion.
-
-
12. A method of manufacturing a step tube for a vehicle, comprising the steps of:
-
extruding a one-piece elongated beam having a plurality of exposed ribs; cutting said one-piece beam to a desired length having a step portion and opposing non-step portions; reducing the height of said ribs in the step portion;
said reducing step including creating a transition portion between the step portion and each non-step portion in which the height of each rib transitions smoothly.
-
Specification