Fifth wheel slide rail

1. A slide rail assembly for a longitudinally adjustable fifth wheel hitch, said assembly configured for mounting to a truck frame member, said slide rail assembly comprising:

a. an angle member having a vertical portion with a plurality of apertures defined therein for securing said angle member to the vertical portion of a truck frame member using fasteners, and a horizontal portion extending from said vertical portion having a top surface; and

b. a slide rail having a generally t-shaped cross-section with a horizontal portion and a vertical portion, said vertical portion including a plurality of spaced-apart gaps; and

c. a stop block assembly including first and second blocks positioned on either side of said slide rail vertical portion, each of said stop blocks having at least two bores, said at least two bores corresponding to the at least two bores in the opposing block for receiving a fastener therein, and wherein at least one stop block includes at least one rectangular boss surrounding at least one of said bores and extending from the block toward said slide rail and configured to be received into said at least one said gap.

2. The slide rail assembly of claim 1 , wherein said second block includes two rectangular bosses surrounding said at least two bores, said at least two bores configured to be received within adjacent gaps.

3. The slide rail assembly of claim 1 , wherein said gaps have a narrowing width from inboard to outboard with respect to the truck frame.

4. A slide rail assembly for a longitudinally adjustable fifth wheel hitch, said assembly configured for mounting to a parallel truck frame members, said slide rail assembly comprising:

a. left and right lateral angle members, each having a vertical portion with a plurality of apertures defined therein for securing each said angle member to the vertical portion of each said parallel truck frame member using fasteners, and a horizontal portion extending from said vertical portion having a top surface; and

b. left and right slide rails, each said slide rail having a generally t-shaped cross-section with a horizontal portion and a vertical portion, each said vertical portion including a plurality of spaced-apart gaps; and

c. a stop block assembly mounted to each said slide rail, each said stop block assembly including first and second blocks positioned on either side of said slide rail vertical portion, each of said stop blocks having at least two bores, said at least two bores corresponding to the at least two bores in the opposing block for receiving a fastener therein, and wherein at least one stop block includes at least one rectangular boss surrounding at least one of said bores and extending from the block toward said slide rail and configured to be received into said at least one said gap.

5. The slide rail assembly of claim 4 , wherein each said second block includes two rectangular bosses surrounding said at least two bores, said at least two bores configured to be received within adjacent gaps.

6. The slide rail assembly of claim 4 , wherein said gaps have narrowing widths.

7. The slide rail assembly of claim 6 , wherein each said second block includes two rectangular bosses surrounding said at least two bores, said at least two bores configured with narrowing widths to be snugly received within adjacent gaps.

8. A slide rail assembly for a longitudinally adjustable fifth wheel hitch, said assembly configured for mounting to a parallel truck frame members, said slide rail assembly comprising:

a. left and right lateral angle members, each having a vertical portion with a plurality of apertures defined therein for securing each said angle member to the vertical portion of each said parallel truck frame member using fasteners, and a horizontal portion extending from said vertical portion having a top surface; and

b. left and right slide rails, each said slide rail having a generally horizontal portion extending toward the interior between said parallel truck frame member and a vertical portion, each said vertical portion including a plurality of spaced-apart gaps; and

c. a stop block assembly mounted to each said slide rail, each said stop block assembly including first and second blocks positioned on either side of said slide rail vertical portion, each of said stop blocks having at least two bores, said at least two bores corresponding to the at least two bores in the opposing block for receiving a fastener therein, and wherein at least one stop block includes at least one rectangular boss surrounding at least one of said bores and extending from the block toward said slide rail and configured to be received into said at least one said gap.

9. The slide rail assembly of claim 8 , wherein each of said slide rails includes a generally t-shaped cross-section.

10. The slide rail assembly of claim 8 , wherein each horizontal portion of each of said slide rails includes a generally arcuate portion.

11. The slide rail assembly of claim 10 , wherein each said slide rail comprises a second horizontal portion extending from the top of said vertical portion generally toward the exterior of the parallel truck frame members.

12. The slide rail assembly of claim 8 , wherein each horizontal portion of each of said slide rails includes a generally arcuate portion extending inboard with respect to the truck frame.

13. The slide rail assembly of claim 12 , wherein each said slide rail comprises a second horizontal portion extending outboard with respect to the truck frame.

14. The slide rail assembly of claim 8 , wherein said gaps narrow in width from inboard to outboard with respect to the truck frame.

15. The slide rail assembly of claim 14 , wherein each horizontal portion of each of said slide rails includes a generally arcuate portion extending inboard with respect to the truck frame.

16. The slide rail assembly of claim 15 , wherein each said slide rail comprises a second horizontal portion extending outboard with respect to the truck frame.

17. The slide rail assembly of claim 14 , wherein each of said slide rails includes a generally t-shaped cross-section.